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AT      AUTOMOTIVE TECHNOLOGY NATEF TASK LIST (2002)

 

AT1       ENGINE REPAIR

AT1A                    General Engine Diagnosis; Removal and Reinstallation (R & R)

AT1A01                Identify and interpret engine concern; determine necessary action P1

AT1A02                Research applicable vehicle and service information, such as internal engine operation, vehicle service history, service precautions, and technical service bulletins              P1

AT1A03                Locate and interpret vehicle and major component identification numbers (VIN, vehicle certification labels, and calibration decals)            P1

AT1A04                Inspect engine assembly for fuel, oil, coolant, and other leaks; determine necessary action     P1

AT1A05                Diagnose engine noises and vibrations; determine necessary action P2

AT1A06                Diagnose the cause of excessive oil consumption, unusual engine exhaust color, odor, and sound; determine necessary action                P2

AT1A07                Perform engine vacuum tests; determine necessary action  P1

AT1A08                Perform cylinder power balance tests; determine necessary action P1

AT1A09                Perform cylinder compression tests; determine necessary action      P1

AT1A10                Perform cylinder leakage tests; determine necessary action                P1

AT1A11                Remove and reinstall engine in a late model front-wheel drive vehicle (OBDI or newer); reconnect all attaching components and restore the vehicle to running condition   P1

AT1A12                Remove and reinstall engine in a late model rear-wheel drive vehicle (OBDI or newer); reconnect all attaching components and restore the vehicle to running condition   P3

AT1B                    Cylinder Head and Valve Train Diagnosis and Repair

AT1B01                Remove cylinder head(s); visually inspect cylinder head(s) for cracks; check gasket surface areas for warpage and leakage; check passage condition       P2

AT1B02                Install cylinder heads and gaskets; tighten according to manufacturer’s specifications and procedures            P1

AT1B03                Inspect valve springs for squareness and free height comparison; determine necessary action              P2

AT1B04                Replace valve stem seals on an assembled engine; inspect valve spring retainers, locks, and valve grooves; determine necessary action            P2

AT1B05                Inspect valve guides for wear; check valve stem-to-guide clearance; determine necessary action          P3

AT1B06                                Inspect valves and valve seats; determine necessary action                P3

AT1B07                Check valve face-to-seat contact and valve seat concentricity (runout); determine necessary action     P3

AT1B08                Check valve spring assembled height and valve stem height; determine necessary action       P3

AT1B09                Inspect pushrods, rocker arms, rocker arm pivots and shafts for wear, bending, cracks, looseness, and blocked oil passages (orifices); determine necessary action P2

AT1B10                                Inspect hydraulic or mechanical lifters; determine necessary action P2

AT1B11                                Adjust valves (mechanical or hydraulic lifters)       P1

AT1B12                Inspect camshaft drives (including gear wear and backlash, sprocket and chain wear); determine necessary action    P2

AT1B13                Inspect and replace timing belts (chains), overhead camdrive sprockets, and tensioners; check belt/chain tension; adjust as necessary          P1

AT1B14                                Inspect camshaft for runout, journal wear and lobe wear    P2

AT1B15                Inspect camshaft bearing surface for wear, damage, out-of-round, and alignment; determine necessary action                P3

AT1B16                Establish camshaft(s) timing and cam sensor indexing according to manufacturer’s specifications and procedures          P1

AT1C                    Engine Block Assembly Diagnosis and Repair

AT1C01                Disassemble engine block; clean and prepare components for inspection and reassembly      P2

AT1C02                Inspect engine block for visible cracks, passage condition, core and gallery plug condition, and surface warpage; determine necessary action            P2

AT1C03                Inspect internal and external threads; restore as needed (includes installing thread inserts)  P2

AT1C04                Inspect and measure cylinder walls for damage, wear, and ridges; determine necessary action            P2

AT1C05                                Deglaze and clean cylinder walls                P2

AT1C06                Inspect and measure camshaft bearings for wear, damage, out-of-round, and alignment; determine necessary action    P3

AT1C07                Inspect crankshaft for end play, straightness, journal damage, keyway damage, thrust flange and sealing surface condition, and visual surface cracks; check oil passage condition; measure journal wear; check crankshaft sensor reluctor ring (where applicable); determine necessary action             P2

AT1C08                Inspect and measure main and connecting rod bearings for damage, clearance, and end play; determine necessary action (includes the proper selection of bearings)              P2

AT1C09                Identify piston and bearing wear patterns that indicate connecting rod alignment and main bearing bore problems; inspect rod alignment and bearing bore condition            P3

AT1C10                                Inspect and measure pistons; determine necessary action  P2

AT1C11                                Remove and replace piston pin    P3

AT1C12                                Inspect, measure, and install piston rings                P1

AT1C13                Inspect auxiliary (balance, intermediate, idler, counterbalance or silencer) shaft(s); inspect shaft(s) and support bearings for damage and wear; determine necessary action; reinstall and time           P2

AT1C14                                Inspect or replace crankshaft vibration damper (harmonic balancer)  P3

AT1C15                Assemble the engine using gaskets, seals, and formed-in-place (tube-applied) sealants, thread sealers, etc according to manufacturer’s specifications              P2

AT1D                    Lubrication and Cooling Systems Diagnosis and Repair

AT1D01                Perform oil pressure tests; determine necessary action         P1

AT1D02                Inspect oil pump gears or rotors, housing, pressure relief devices, and pump drive; perform necessary action                P2

AT1D03                Perform cooling system, cap, and recovery system tests (pressure, combustion leakage, and temperature); determine necessary action            P1

AT1D04                Inspect, replace, and adjust drive belts, tensioners, and pulleys; check pulley and belt alignment        P1

AT1D05                Inspect and replace engine cooling and heater system hoses             P1

AT1D06                Inspect, test, and replace thermostat and housing P2

AT1D07                Test coolant; drain and recover coolant; flush and refill cooling system with recommended coolant; bleed air as required                P1

AT1D08                Inspect, test, remove, and replace water pump        P1

AT1D09                Remove and replace radiator        P2

AT1D10                Inspect, and test fans(s) (electrical or mechanical), fan clutch, fan shroud, and air dams         P2

AT1D11                Inspect auxiliary oil coolers; determine necessary action    P3

AT1D12                Inspect, test, and replace oil temperature and pressure switches and sensors P2

AT1D13                Perform oil and filter change         P2

 

AT2       AUTOMATIC TRANSMISSION AND TRANSAXLE

AT2A                    General Transmission and Transaxle Diagnosis

AT2A01                Identify and interpret transmission/transaxle concern; assure proper engine operation; determine necessary action    P1

AT2A02                Research applicable vehicle and service information, such as transmission/transaxle system operation, vehicle service history, service precautions, and technical service bulletins                P1

AT2A03                Locate and interpret vehicle and major component identification numbers (VIN, vehicle certification labels, and calibration decals)            P1

AT2A04                Diagnose fluid usage, level, and condition concerns; determine necessary action P1

AT2A05                Perform pressure tests; determine necessary action               P1

AT2A06                Perform stall test; determine necessary action         P2

AT2A07                Perform lock-up converter system tests; determine necessary action  P1

AT2A08                Diagnose electronic, mechanical, hydraulic, vacuum control system concerns; determine necessary action     P1

AT2A09                Diagnose noise and vibration concerns; determine necessary action  P2

AT2A10                Diagnose transmission/transaxle gear reduction/multiplication concerns using driving, driven, and held member (power flow) principles  P1

AT2B                    Transmission and Transaxle Maintenance and Adjustment

AT2B01                Inspect, adjust or replace throttle valve (TV) linkages or cables; manual shift linkages or cables; transmission range sensor; check gear select indicator (as applicable)     P1

AT2B02                Service transmission; perform visual inspection; replace fluids and filters   P1

AT2C                     In-Vehicle Transmission and Transaxle Repair

AT2C01                Inspect, adjust or replace (as applicable) vacuum modulator; inspect and repair or replace lines and hoses    P3

AT2C02                                Inspect, repair, and replace governor assembly      P3

AT2C03                                Inspect and replace external seals and gaskets       P2

AT2C04                Inspect extension housing, bushings and seals; perform necessary action    P3

AT2C05                                Inspect, leak test, flush, and replace cooler, lines, and fittings           P2

AT2C06                Inspect and replace speedometer drive gear, driven gear, vehicle speed sensor (VSS), and retainers    P2

AT2C07                Diagnose electronic transmission control systems using a scan tool; determine necessary action         P1

AT2C08                I               Inspect, replace, and align powertrain mounts       P2

AT2D                    Off-Vehicle Transmission and Transaxle Repair

AT2D01                Removal, Disassembly, and Reinstallation

AT2D011             Remove and reinstall transmission and torque converter (rear-wheel drive) P2

AT2D012             Remove and reinstall transaxle and torque converter assembly        P1

AT2D013             Disassemble, clean, and inspect transmission/transaxle    P1

AT2D014             Inspect, measure, clean, and replace valve body (includes surfaces and bores, springs, valves, sleeves, retainers, brackets, check-balls, screens, spacers, and gaskets)             P2

AT2D015             Inspect servo bore, piston, seals, pin, spring, and retainers; determine necessary action          P3

AT2D016             Inspect accumulator bore, piston, seals, spring, and retainer; determine necessary action       P3

AT2D017             Assemble transmission/transaxle              P1

AT2D02                Oil Pump and Converter

AT2D021             Inspect converter flex plate, attaching parts, pilot, pump drive, and seal areas P2

AT2D022             Measure torque converter endplay and check for interference; check stator clutch P2

AT2D023             Inspect, measure, and reseal oil pump assembly and components   P1

AT2D03               Gear Train, Shafts, Bushings and Case

AT2D031             Measure endplay or preload; determine necessary action   P1

AT2D032             Inspect, measure, and replace thrust washers and bearings               P2

AT2D033             Inspect oil delivery seal rings, ring grooves, and sealing surface areas           P2

AT2D034             Inspect bushings; determine necessary action         P2

AT2D035             Inspect and measure planetary gear assembly (includes sun, ring gear, thrust washers, planetary gears, and carrier assembly); determine necessary action P2

AT2D036             Inspect case bores, passages, bushings, vents, and mating surfaces; determine necessary action          P2

AT2D037             Inspect transaxle drive, link chains, sprockets, gears, bearings, and bushings; perform necessary action          P2

AT2D038             Inspect, measure, repair, adjust or replace transaxle final drive components P2

AT2D039             Inspect and reinstall parking pawl, shaft, spring, and retainer; determine necessary action   P3

AT2D04               Friction and Reaction Units

AT2D041             Inspect clutch drum, piston, check-balls, springs, retainers, seals, and friction and pressure plates; determine necessary action                P2

AT2D042             Measure clutch pack clearance; determine necessary action              P1

AT2D043             Air test operation of clutch and servo assemblies   P1

AT2D044             Inspect roller and sprag clutch, races, rollers, sprags, springs, cages, and retainers; replace as needed              P1

AT2D045             Inspect bands and drums; determine necessary action        P2

 

AT3       MANUAL DRIVE TRAIN AND AXLES

AT3A                    General Drive Train Diagnosis

AT3A01                Identify and interpret drive train concern; determine necessary action           P1

AT3A02                Research applicable vehicle and service information, such as drive train system operation, vehicle service history, service precautions, and technical service bulletins              P1

AT3A03                Locate and interpret vehicle and major component identification numbers (VIN, vehicle certification labels, calibration decals)            P1

AT3A04                Diagnose fluid usage, level, and condition concerns; determine necessary action P1

AT3A05                Drain and fill manual transmission/transaxle and final drive unit P2

AT3B                    Clutch Diagnosis and Repair

AT3B01                Diagnose clutch noise, binding, slippage, pulsation, and chatter; determine necessary action              P1

AT3B02                Inspect clutch pedal linkage, cables, automatic adjuster mechanisms, brackets, bushings, pivots, and springs; perform necessary action                P1

AT3B03                Inspect hydraulic clutch slave and master cylinders, lines, and hoses; determine necessary action     P1

AT3B04                Inspect release (throw-out) bearing, lever, and pivot; determine necessary action P1

AT3B05                                Inspect and replace clutch pressure plate assembly and clutch disc  P1

AT3B06                                Bleed clutch hydraulic system      P1

AT3B07                                Inspect, remove or replace pilot bearing or bushing (as applicable) P1

AT3B08                Inspect flywheel and ring gear for wear and cracks, determine necessary action P1

AT3B09                Inspect engine block, clutch (bell) housing, transmission/transaxle case mating surfaces, and alignment dowels; determine necessary action            P3

AT3B10                Measure flywheel runout and crankshaft endplay; determine necessary action P3

AT3C                     Transmission/Transaxle Diagnosis and Repair

AT3C01                                Remove and reinstall transmission/transaxle        P1

AT3C02                Disassemble, clean, and reassemble transmission/transaxle components    P2

AT3C03                Inspect transmission/transaxle case, extension housing, case mating surfaces, bores, bushings, and vents; perform necessary action                P3

AT3C04                Diagnose noise, hard shifting, jumping out of gear, and fluid leakage concerns; determine necessary action   P2

AT3C05                Inspect, adjust, and reinstall shift linkages, brackets, bushings, cables, pivots, and levers      P2

AT3C06                                Inspect and reinstall powertrain mounts  P3

AT3C07                                Inspect and replace gaskets, seals, and sealants; inspect sealing surfaces     P2

AT3C08                                Remove and replace transaxle final drive P3

AT3C09                Inspect, adjust, and reinstall shift cover, forks, levers, grommets, shafts, sleeves, detent mechanism, interlocks, and springs         P2

AT3C10                Measure endplay or preload (shim or spacer selection procedure) on transmission/transaxle shafts; perform necessary action                P1

AT3C11                Inspect and reinstall synchronizer hub, sleeve, keys (inserts), springs, and blocking rings     P2

AT3C12                Inspect and reinstall speedometer drive gear, driven gear, vehicle speed sensor (VSS), and retainers  P2

AT3C13                Diagnose transaxle final drive assembly noise and vibration concerns; determine necessary action   P3

AT3C14                Remove, inspect, measure, adjust, and reinstall transaxle final drive pinion gears (spiders), shaft, side gears, side bearings, thrust washers, and case assembly P2

AT3C15                Inspect lubrication devices (oil pump or slingers); perform necessary action P3

AT3C16                Inspect, test, and replace transmission/transaxle sensors and switches       P1

AT3D                    Drive Shaft and Half Shaft, Universal and Constant-Velocity (CV) Joint Diagnosis and Repair

AT3D01                Diagnose constant-velocity (CV) joint noise and vibration concerns; determine necessary action         P1

AT3D02                Diagnose universal joint noise and vibration concerns; perform necessary action P1

AT3D03                Replace front wheel drive (FWD) front wheel bearing          P2

AT3D04                Inspect, service, and replace shafts, yokes, boots, and CV joints        P1

AT3D05                Inspect, service, and replace shaft center support bearings P3

AT3D06                Check shaft balance; measure shaft runout; measure and adjust driveline angles P2

AT3E                     Drive Axle Diagnosis and Repair

AT3E01                                Ring and Pinion Gears and Differential Case Assembly

AT3E0101            Diagnose noise and vibration concerns; determine necessary action  P2

AT3E0102            Diagnose fluid leakage concerns; determine necessary action           P2

AT3E0103            Inspect and replace companion flange and pinion seal; measure companion flange runout  P2

AT3E0104            Inspect ring gear and measure runout; determine necessary action  P2

AT3E0105            Remove, inspect, and reinstall drive pinion and ring gear, spacers, sleeves, and bearings      P2

AT3E0106            Measure and adjust drive pinion depth    P2

AT3E0107            Measure and adjust drive pinion bearing preload P1

AT3E0108            Measure and adjust side bearing preload and ring and pinion gear total backlash and backlash variation on a differential carrier assembly (threaded cup or shim types)  P2

AT3E0109            Check ring and pinion tooth contact patterns; perform necessary action       P1

AT3E0110            Disassemble, inspect, measure, and adjust or replace differential pinion gears (spiders), shaft, side gears, side bearings, thrust washers, and case             P2

AT3E0111            Reassemble and reinstall differential case assembly; measure runout; determine necessary action  P2

AT3E02                                Limited Slip Differential

AT3E021              Diagnose noise, slippage, and chatter concerns; determine necessary action P3

AT3E022              Inspect and flush differential housing; refill with correct lubricant  P2

AT3E023              Inspect and reinstall clutch (cone or plate) components      P3

AT3E024              Measure rotating torque; determine necessary action           P3

AT3E03                                Drive Axle Shaft

AT3E031              Diagnose drive axle shafts, bearings, and seals for noise, vibration, and fluid leakage concerns; determine necessary action                P2

AT3E032              Inspect and replace drive axle shaft wheel studs   P3

AT3E033              Remove and replace drive axle shafts        P1

AT3E034              Inspect and replace drive axle shaft seals, bearings, and retainers   P2

AT3E035              Measure drive axle flange runout and shaft endplay; determine necessary action P2

AT3F                     Four-wheel Drive/All-wheel Drive Component Diagnosis and Repair

AT3F01                 Diagnose noise, vibration, and unusual steering concerns; determine necessary action           P3

AT3F02                 Inspect, adjust, and repair shifting controls (mechanical, electrical, and vacuum), bushings, mounts, levers, and brackets                P3

AT3F03                 Remove and reinstall transfer case              P3

AT3F04                 Disassemble, service, and reassemble transfer case and components  P3

AT3F05                 Inspect front-wheel bearings and locking hubs; perform necessary action    P3

AT3F06                 Check drive assembly seals and vents; check lube level       P3

AT3F07                 Diagnose test, adjust, and replace electrical/electronic components of four-wheel drive systems         P3

 

AT4                       SUSPENSION AND STEERING

AT4A                    General Suspension and Steering Systems Diagnosis

AT4A01                Identify and interpret suspension and steering concern; determine necessary action                P1

AT4A02                Research applicable vehicle and service information, such as suspension and steering system operation, vehicle service history, service precautions, and technical service bulletins                P1

AT4A03                Locate and interpret vehicle and major component identification numbers (VIN, vehicle certification labels, calibration decals)            P1

AT4B                     Steering Systems Diagnosis and Repair

AT4B01                                Disable and enable supplemental restraint system (SRS)    P1

AT4B02                Remove and replace steering wheel; center/time supplemental restraint system (SRS) coil (clock spring)         P1

AT4B03                Diagnose steering column noises, looseness, and binding concerns (including tilt mechanisms); determine necessary action                P2

AT4B04                Diagnose power steering gear (non-rack and pinion) binding, uneven turning effort, looseness, hard steering, and fluid leakage concerns; determine necessary action      P3

AT4B05                Diagnose power steering gear (rack and pinion) binding, uneven turning effort, looseness, hard steering, and fluid leakage concerns; determine necessary action P3

AT4B06                Inspect steering shaft universal-joint(s), flexible coupling(s), collapsible column, lock cylinder mechanism, and steering wheel; perform necessary action  P2

AT4B07                Adjust manual or power non-rack and pinion worm bearing preload and sector lash             P3

AT4B08                Remove and replace manual or power rack and pinion steering gear; inspect mounting bushings and brackets                P1

AT4B09                Inspect and replace manual or power rack and pinion steering gear inner tie rod ends (sockets) and bellows boots      P1

AT4B10                                Inspect power steering fluid levels and condition  P1

AT4B11                                Flush, fill, and bleed power steering system             P2

AT4B12                                Diagnose power steering fluid leakage; determine necessary action  P2

AT4B13                                Remove, inspect, replace, and adjust power steering pump belt  P1

AT4B14                                Remove and reinstall power steering pump             P3

AT4B15                Remove and reinstall power steering pump pulley; check pulley and belt alignment                P3

AT4B16                                Inspect and replace power steering hoses and fittings         P2

AT4B17                Inspect and replace pitman arm, relay (centerlink/intermediate) rod, idler arm and mountings, and steering linkage damper  P2

AT4B18                Inspect, replace, and adjust tie rod ends (sockets), tie rod sleeves, and clamps P1

AT4B19                Test and diagnose components of electronically controlled steering systems using a scan tool; determine necessary action                P3

AT4C                    Suspension Systems Diagnosis and Repair

AT4C01                                Front Suspension

AT4C0101           Diagnose short and long arm suspension system noises, body sway, and uneven riding height concerns; determine necessary action P1

AT4C0102           Diagnose strut suspension system noises, body sway, and uneven riding height concerns; determine necessary action    P1

AT4C0103           Remove, inspect, and install upper and lower control arms, bushings, shafts, and rebound bumpers                P3

AT4C0104           Remove, inspect and install strut rods (compression/tension) and bushings  P2

AT4C0105           Remove, inspect, and install upper and/or lower ball joints              P2

AT4C0106           Remove, inspect, and install steering knuckle assemblies   P2

AT4C0107           Remove, inspect, and install short and long arm suspension system coil springs and spring insulators           P2

AT4C0108           Remove, inspect, install, and adjust suspension system torsion bars; inspect mounts              P3

AT4C0109           Remove, inspect, and install stabilizer bar bushings, brackets, and links      P2

AT4C0110           Remove, inspect, and install strut cartridge or assembly, strut coil spring, insulators (silencers), and upper strut bearing mount    P1

AT4C0111           Lubricate suspension and steering systems             P2

AT4C02                                Rear Suspension

AT4C021              Remove, inspect, and install coil springs and spring insulators       P2

AT4C022              Remove, inspect, and install transverse links, control arms, bushings, and mounts  P2

AT4C023              Remove, inspect, and install leaf springs, leaf spring insulators (silencers), shackles, brackets, bushings, and mounts P3

AT4C024              Remove, inspect, and install strut cartridge or assembly, strut coil spring, and insulators (silencers)  P2

AT4C03                                Miscellaneous Service

AT4C031              Inspect, remove, and replace shock absorbers         P1

AT4C032              Remove, inspect, and service or replace front and rear wheel bearings           P1

AT4C033              Test and diagnose components of electronically controlled suspension systems using a scan tool; determine necessary action P3

AT4D                    Wheel Alignment Diagnosis, Adjustment, and Repair

AT4D01                Differentiate between steering and suspension concerns using principles of steering geometry (caster, camber, toe, etc) P1

AT4D02                Diagnose vehicle wander, drift, pull, hard steering, bump steer, memory steer, torque steer, and steering return concerns; determine necessary action        P1

AT4D03                Perform prealignment inspection; perform necessary action              P1

AT4D04                Measure vehicle riding height; determine necessary action                P1

AT4D05                Check and adjust front and rear wheel camber; perform necessary action     P1

AT4D06                Check and adjust caster; perform necessary action                P1

AT4D07                Check and adjust front wheel toe; adjust as needed              P1

AT4D08                Center steering wheel      P1

AT4D09                Check toe-out-on-turns (turning radius); determine necessary action             P2

AT4D10                Check SAI (steering axis inclination) and included angle; determine necessary action             P2

AT4D11                Check and adjust rear wheel toe  P2

AT4D12                Check rear wheel thrust angle; determine necessary action                P2

AT4D13                Check for front wheel setback; determine necessary action P2

AT4D14                Check front cradle (subframe) alignment; determine necessary action            P3

AT4E                     Wheel and Tire Diagnosis and Repair

AT4E01                                Diagnose tire wear patterns; determine necessary action    P1

AT4E02                                Inspect tires; check and adjust air pressure              P1

AT4E03                Diagnose wheel/tire vibration, shimmy, and noise; determine necessary action P2

AT4E04                                Rotate tires according to manufacturer’s recommendations               P1

AT4E05                Measure wheel, tire, axle, and hub runout; determine necessary action         P2

AT4E06                                Diagnose tire pull (lead) problem; determine necessary action  P2

AT4E07                                Balance wheel and tire assembly (static and dynamic)        P1

AT4E08                                Dismount, inspect, repair, and remount tire on wheel          P2

AT4E09                                Reinstall wheel; torque lug nuts   P1

AT4E10                                Inspect and repair tire     P2

 

AT5       BRAKES

AT5A                    General Brake Systems Diagnosis

AT5A01                Identify and interpret brake system concern; determine necessary action      P1

AT5A02                Research applicable vehicle and service information, such as brake system operation, vehicle service history, service precautions, and technical service bulletins              P1

AT5A03                Locate and interpret vehicle and major component identification numbers (VIN, vehicle certification labels, calibration decals)            P1

AT5B                     Hydraulic System Diagnosis and Repair

AT5B01                Diagnose pressure concerns in the brake system using hydraulic principles (Paschal’s Law)               P1

AT5B02                                Measure brake pedal height; determine necessary action    P2

AT5B03                Check master cylinder for internal and external leaks and proper operation; determine necessary action         P2

AT5B04                                Remove, bench bleed, and reinstall master cylinder              P1

AT5B05                Diagnose poor stopping, pulling or dragging concerns caused by malfunctions in the hydraulic system; determine necessary action            P1

AT5B06                Inspect brake lines, flexible hoses, and fittings for leaks, dents, kinks, rust, cracks, bulging or wear; tighten loose fittings and supports; determine necessary action P2

AT5B07                Fabricate and/or install brake lines (double flare and ISO types); replace hoses, fittings, and supports as needed                P2

AT5B08                                Select, handle, store, and fill brake fluids to proper level     P1

AT5B09                Inspect, test, and/or replace metering (hold-off), proportioning (balance), pressure differential, and combination valves    P2

AT5B10                                Inspect, test, and adjust height (load) sensing proportioning valve  P3

AT5B11                Inspect, test, and/or replace components of brake warning light system       P3

AT5B12                                Bleed (manual, pressure, vacuum or surge) brake system    P1

AT5B13                                Flush hydraulic system   P3

AT5C                    Drum Brake Diagnosis and Repair

AT5C01                Diagnose poor stopping, noise, pulling, grabbing, dragging or pedal pulsation concerns; determine necessary action    P1

AT5C02                Remove, clean (using proper safety procedures), inspect, and measure brake drums; determine necessary action                P1

AT5C03                                Refinish brake drum        P1

AT5C04                Remove, clean, and inspect brake shoes, springs, pins, clips, levers, adjusters/self-adjusters, other related brake hardware, and backing support plates; lubricate and reassemble    P1

AT5C05                                Remove, inspect, and install wheel cylinders          P2

AT5C06                Pre-adjust brake shoes and parking brake before installing brake drums or drum/hub assemblies and wheel bearings               P1

AT5C07                Install wheel, torque lug nuts, and make final checks and adjustments         P1

AT5D                    Disc Brake Diagnosis and Repair

AT5D01                Diagnose poor stopping, noise, pulling, grabbing, dragging or pedal pulsation concerns; determine necessary action    P1

AT5D02                Remove caliper assembly from mountings; clean and inspect for leaks and damage to caliper housing; determine necessary action                P1

AT5D03                Clean and inspect caliper mounting and slides for wear and damage; determine necessary action     P1

AT5D04                Remove, clean, and inspect pads and retaining hardware; determine necessary action           P1

AT5D05                Disassemble and clean caliper assembly; inspect parts for wear, rust, scoring, and damage; replace seal, boot, and damaged or worn parts          P2

AT5D06                Reassemble, lubricate, and reinstall caliper, pads, and related hardware; seat pads, and inspect for leaks       P1

AT5D07                Clean, inspect, and measure rotor with a dial indicator and a micrometer; follow manufacturer’s recommendations in determining need to machine or replace P1

AT5D08                Remove and reinstall rotor             P1

AT5D09                Refinish rotor according to manufacturer’s recommendations          P1

AT5D10                Adjust calipers equipped with an integrated parking brake system  P3

AT5D11                Install wheel, torque lug nuts, and make final checks and adjustments         P1

AT5E                     Power Assist Units Diagnosis and Repair

AT5E01                Test pedal free travel with and without engine running; check power assist operation            P2

AT5E02                Check vacuum supply (manifold or auxiliary pump) to vacuum-type power booster                P2

AT5E03                Inspect the vacuum-type power booster unit for vacuum leaks; inspect the check valve for proper operation; determine necessary action            P2

AT5E04                Inspect and test hydro-boost system and accumulator for leaks and proper operation; determine necessary action                P3

AT5F                     Miscellaneous (Wheel Bearings, Parking Brakes, Electrical, Etc.) Diagnosis and Repair

AT5F01                 Diagnose wheel bearing noises, wheel shimmy, and vibration concerns; determine necessary action P1

AT5F02                 Remove, clean, inspect, repack, and install wheel bearings and replace seals; install hub and adjust wheel bearings               P1

AT5F03                 Check parking brake cables and components for wear, rusting, binding, and corrosion; clean, lubricate, or replace as needed              P2

AT5F04                 Check parking brake operation; determine necessary action              P1

AT5F05                 Check operation of parking brake indicator light system     P3

AT5F06                 Check operation of brake stop light system; determine necessary action        P1

AT5F07                 Replace wheel bearing and race   P1

AT5F08                 Inspect and replace wheel studs  P1

AT5F09                 Remove and reinstall sealed wheel bearing assembly          P2

AT5G                    Antilock Brake and Traction Control Systems

AT5G01                Identify and inspect antilock brake system (ABS) components; determine necessary action    P1

AT5G02                Diagnose poor stopping, wheel lock-up, abnormal pedal feel or pulsation, and noise concerns caused by the antilock brake system (ABS); determine necessary action    P2

AT5G03                Diagnose antilock brake system (ABS) electronic control(s) and components using self-diagnosis and/or recommended test equipment; determine necessary action P1

AT5G04                Depressurize high-pressure components of the antilock brake system (ABS)               P3

AT5G05                Bleed the antilock brake system’s (ABS) front and rear hydraulic circuits     P2

AT5G06                Remove and install antilock brake system (ABS) electrical/electronic and hydraulic components       P3

AT5G07                Test, diagnose and service ABS speed sensors, toothed ring (tone wheel), and circuits using a graphing multimeter (GMM)/digital storage oscilloscope (DSO) (includes output signal, resistance, shorts to voltage/ground, and frequency data)        P1

AT5G08                Diagnose antilock brake system (ABS) braking concerns caused by vehicle modifications (tire size, curb height, final drive ratio, etc.)        P3

AT5G09                Identify traction control system components           P3

 

AT6       ELECTRICAL/ELECTRONIC SYSTEMS

AT6A                    General Electrical System Diagnosis

AT6A01                Identify and interpret electrical/electronic system concern; determine necessary action          P1

AT6A02                Research applicable vehicle and service information, such as electrical/electronic system operation, vehicle service history, service precautions, and technical service bulletins                P1

AT6A03                Locate and interpret vehicle and major component identification numbers (VIN, vehicle certification labels, and calibration decals)            P1

AT6A04                Diagnose electrical/electronic integrity for series, parallel and series-parallel circuits using principles of electricity (Ohm’s Law)   P1

AT6A05                Use wiring diagrams during diagnosis of electrical circuit problems P1

AT6A06                Demonstrate the proper use of a digital multimeter (DMM) during diagnosis of electrical circuit problems      P1

AT6A07                Check electrical circuits with a test light; determine necessary action             P2

AT6A08                Measure source voltage and perform voltage drop tests in electrical/electronic circuits using a voltmeter; determine necessary action            P1

AT6A09                Measure current flow in electrical/electronic circuits and components using an ammeter; determine necessary action    P1

AT6A10                Check continuity and measure resistance in electrical/electronic circuits and components using an ohmmeter; determine necessary action            P1

AT6A11                Check electrical circuits using fused jumper wires; determine necessary action P2

AT6A12                Locate shorts, grounds, opens, and resistance problems in electrical/electronic circuits; determine necessary action    P1

AT6A13                Measure and diagnose the cause(s) of excessive key-off battery drain (parasitic draw); determine necessary action    P1

AT6A14                Inspect and test fusible links, circuit breakers, and fuses; determine necessary action              P1

AT6A15                Inspect and test switches, connectors, relays, solid state devices, and wires of electrical/electronic circuits; perform necessary action                P1

AT6A16                Repair wiring harnesses and connectors  P1

AT6A17                Perform solder repair of electrical wiring  P1

AT6B                    Battery Diagnosis and Service

AT6B01                                Perform battery state-of-charge test; determine necessary action       P1

AT6B02                Perform battery capacity test; confirm proper battery capacity for vehicle application; determine necessary action                P1

AT6B03                                Maintain or restore electronic memory functions   P1

AT6B04                                Inspect, clean, fill, and replace battery       P2

AT6B05                                Perform slow/fast battery charge                P2

AT6B06                Inspect and clean battery cables, connectors, clamps, and hold-downs; repair or replace as needed   P1

AT6B07                Start a vehicle using jumper cables and a battery or auxiliary power supply P1

AT6C                    Starting System Diagnosis and Repair

AT6C01                                Perform starter current draw tests; determine necessary action P1

AT6C02                Perform starter circuit voltage drop tests; determine necessary action             P1

AT6C03                Inspect and test starter relays and solenoids; determine necessary action     P2

AT6C04                                Remove and install starter in a vehicle      P1

AT6C05                Inspect and test switches, connectors, and wires of starter control circuits; perform necessary action P2

AT6C06                Differentiate between electrical and engine mechanical problems that cause a slow-crank or no-crank condition                P2

AT6D                    Charging System Diagnosis and Repair

AT6D01                Perform charging system output test; determine necessary action P1

AT6D02                Diagnose charging system for the cause of undercharge, no-charge, and overcharge conditions          P1

AT6D03                Inspect, adjust, or replace generator (alternator) drive belts, pulleys, and tensioners; check pulley and belt alignment            P2

AT6D04                Remove, inspect, and install generator (alternator)                P1

AT6D05                Perform charging circuit voltage drop tests; determine necessary action        P1

AT6E                     Lighting Systems Diagnosis and Repair

AT6E01                Diagnose the cause of brighter than normal, intermittent, dim, or no light operation; determine necessary action                P1

AT6E02                                Inspect, replace, and aim headlights and bulbs      P2

AT6E03                Inspect and diagnose incorrect turn signal or hazard light operation; perform necessary action P2

AT6F                     Gauges, Warning Devices, and Driver Information Systems Diagnosis and Repair

AT6F01                 Inspect and test gauges and gauge sending units for cause of intermittent, high, low, or no gauge readings; determine necessary action            P1

AT6F02                 Inspect and test connectors, wires, and printed circuit boards of gauge circuits; determine necessary action   P3

AT6F03                 Diagnose the cause of incorrect operation of warning devices and other driver information systems; determine necessary action P1

AT6F04                 Inspect and test sensors, connectors, and wires of electronic instrument circuits; determine necessary action P2

AT6G                    Horn and Wiper/Washer Diagnosis and Repair

AT6G01                Diagnose incorrect horn operation; perform necessary action           P2

AT6G02                Diagnose incorrect wiper operation; diagnose wiper speed control and park problems; perform necessary action                P2

AT6G03                Diagnose incorrect washer operation; perform necessary action P2

AT6H                    Accessories Diagnosis and Repair

AT6H01               Diagnose incorrect operation of motor-driven accessory circuits; determine necessary action                P2

AT6H02               Diagnose incorrect heated glass operation; determine necessary action         P3

AT6H03               Diagnose incorrect electric lock operation; determine necessary action          P2

AT6H04               Diagnose incorrect operation of cruise control systems; determine necessary action P3

AT6H05               Diagnose supplemental restraint system (SRS) concerns; determine necessary action (Note: Follow manufacturer’s safety procedures to prevent accidental deployment.)            P2

AT6H06               Disarm and enable the airbag system for vehicle service     P1

AT6H07               Diagnose radio static and weak, intermittent, or no radio reception; determine necessary action          P3

AT6H08               Remove and reinstall door panel P1

AT6H09               Diagnose body electronic system circuits using a scan tool; determine necessary action          P2

AT6H10               Check for module communication errors using a scan tool P3

AT6H11               Diagnose the cause of false, intermittent, or no operation of anti-theft system P2

 

AT7       HEATING AND AIR CONDITIONING

AT7A                    A/C System Diagnosis and Repair

AT7A01                Identify and interpret heating and air conditioning concern; determine necessary action       P1

AT7A02                Research applicable vehicle and service information, such as heating and air conditioning system operation, vehicle service history, service precautions, and technical service bulletins P1

AT7A03                Locate and interpret vehicle and major component identification numbers (VIN, vehicle certification labels, calibration decals)            P1

AT7A04                Performance test A/C system; diagnose A/C system malfunctions using principles of refrigeration   P1

AT7A05                Diagnose abnormal operating noises in the A/C system; determine necessary action              P2

AT7A06                Identify refrigerant type; conduct a performance test of the A/C system; determine necessary action  P1

AT7A07                Leak test A/C system; determine necessary action                P1

AT7A08                Inspect the condition of discharged oil; determine necessary action  P2

AT7A09                Determine recommended oil for system application              P1

AT7B                     Refrigeration System Component Diagnosis and Repair

AT7B01                                Compressor and Clutch

AT7B011              Diagnose A/C system conditions that cause the protection devices (pressure, thermal, and PCM) to interrupt system operation; determine necessary action P2

AT7B012              Inspect A/C compressor drive belts; determine necessary action     P2

AT7B013              Inspect, test, and/or replace A/C compressor clutch components and/or assembly P2

AT7B014              Remove and reinstall A/C compressor and mountings; measure oil quantity; determine necessary action       P1

AT7B02                                Evaporator, Condenser, and Related Components

AT7B021              Determine need for an additional A/C system filter; perform necessary action P3

AT7B022              Remove and inspect A/C system mufflers, hoses, lines, fittings, O-rings, seals, and service valves; perform necessary action                P2

AT7B023              Inspect A/C condenser for airflow restrictions; perform necessary action     P1

AT7B024              Remove and reinstall receiver/drier or accumulator/drier; measure oil quantity; determine necessary action P1

AT7B025              Remove and install expansion valve or orifice (expansion) tube       P2

AT7B026              Inspect evaporator housing water drain; perform necessary action  P3

AT7B027              Remove and reinstall evaporator; measure oil quantity; determine necessary action P3

AT7B028              Remove and reinstall condenser; measure oil quantity; determine necessary action  P3

AT7C                     Heating, Ventilation, and Engine Cooling Systems Diagnosis and Repair

AT7C01                Diagnose temperature control problems in the heater/ventilation system; determine necessary action              P2

AT7C02                Perform cooling system, cap, and recovery system tests (pressure, combustion leakage, and temperature); determine necessary action            P1

AT7C03                Inspect engine cooling and heater system hoses and belts; perform necessary action                P1

AT7C04                                Inspect, test, and replace thermostat and housing P1

AT7C05                Determine coolant condition and coolant type for vehicle application; drain and recover coolant        P1

AT7C06                Flush system; refill system with recommended coolant; bleed system             P1

AT7C07                Inspect and test cooling fan, fan clutch, fan shroud, and air dams; perform necessary action                P1

AT7C08                Inspect and test electric cooling fan, fan control system and circuits; determine necessary action         P1

AT7C09                                Inspect and test heater control valve(s); perform necessary action      P2

AT7C10                                Remove and reinstall heater core P3

AT7D                    Operating Systems and Related Controls Diagnosis and Repair

AT7D01                Diagnose malfunctions in the electrical controls of heating, ventilation, and A/C (HVAC) systems; determine necessary action                P2

AT7D02                Inspect and test A/C-heater blower, motors, resistors, switches, relays, wiring, and protection devices; perform necessary action                P1

AT7D03                Test and diagnose A/C compressor clutch control systems; determine necessary action         P1

AT7D04                Diagnose malfunctions in the vacuum and mechanical components and controls of the heating, ventilation, and A/C (HVAC) system; determine necessary action P2

AT7D05                Inspect and test A/C-heater control panel assembly; determine necessary action P3

AT7D06                Inspect and test A/C-heater control cables and linkages; perform necessary action  P3

AT7D07                Inspect A/C-heater ducts, doors, hoses, cabin filters and outlets; perform necessary action   P3

AT7D08                Check operation of automatic and semi-automatic heating, ventilation, and air-conditioning (HVAC) control systems; determine necessary action          P3

AT7E                     Refrigerant Recovery, Recycling, and Handling

AT7E01                Perform correct use and maintenance of refrigerant handling equipment      P1

AT7E02                Identify (by label application or use of a refrigerant identifier) and recover A/C system refrigerant     P1

AT7E03                                Recycle refrigerant            P1

AT7E04                                Label and store refrigerant             P1

AT7E05                                Test recycled refrigerant for non-condensable gases             P1

AT7E06                                Evacuate and charge A/C system               P1

 

AT8       ENGINE PERFORMANCE

AT8A                    General Engine Diagnosis

AT8A01                Identify and interpret engine performance concern; determine necessary action P1

AT8A02                Research applicable vehicle and service information, such as engine management system operation, vehicle service history, service precautions, and technical service bulletins                P1

AT8A03                Locate and interpret vehicle and major component identification numbers (VIN, vehicle certification labels, and calibration decals)            P1

AT8A04                Inspect engine assembly for fuel, oil, coolant, and other leaks; determine necessary action     P2

AT8A05                Diagnose abnormal engine noise or vibration concerns; determine necessary action                P2

AT8A06                Diagnose abnormal exhaust color, odor, and sound; determine necessary action P2

AT8A07                Perform engine absolute (vacuum/boost) manifold pressure tests; determine necessary action             P1

AT8A08                Perform cylinder power balance test; determine necessary action    P1

AT8A09                Perform cylinder compression tests; determine necessary action      P1

AT8A10                Perform cylinder leakage test; determine necessary action  P1

AT8A11                Diagnose engine mechanical, electrical, electronic, fuel, and ignition concerns with an oscilloscope and/or engine diagnostic equipment; determine necessary action  P1

AT8A12                Prepare 4 or 5 gas analyzer; inspect and prepare vehicle for test, and obtain exhaust readings; interpret readings, and determine necessary action   P1

AT8A13                Verify engine operating temperature; determine necessary action      P1

AT8A14                Perform cooling system pressure tests; check coolant condition; inspect and test radiator, pressure cap, coolant recovery tank, and hoses; perform necessary action              P1

AT8A15                Verify correct camshaft timing      P2

AT8B                    Computerized Engine Controls Diagnosis and Repair

AT8B01                Retrieve and record stored OBD I diagnostic trouble codes; clear codes         P2

AT8B02                Retrieve and record stored OBD II diagnostic trouble codes; clear codes        P1

AT8B03                Diagnose the causes of emissions or driveability concerns resulting from malfunctions in the computerized engine control system with stored diagnostic trouble codes               P1

AT8B04                Diagnose emissions or driveability concerns resulting from malfunctions in the computerized engine control system with no stored diagnostic trouble codes; determine necessary action               P1

AT8B05                                Check for module communication errors using a scan tool P2

AT8B06                Inspect and test computerized engine control system sensors, powertrain control module (PCM), actuators, and circuits using a graphing multimeter (GMM)/digital storage oscilloscope (DSO); perform necessary action    P1

AT8B07                                Obtain and interpret scan tool data            P1

AT8B08                Access and use service information to perform step-by-step diagnosis           P1

AT8B09                Diagnose driveability and emissions problems resulting from malfunctions of interrelated systems (cruise control, security alarms, suspension controls, traction controls, A/C, automatic transmissions, non-OEM-installed accessories, or similar systems); determine necessary action            P3

AT8C                    Ignition System Diagnosis and Repair

AT8C01                Diagnose ignition system related problems such as no-starting, hard starting, engine misfire, poor driveability, spark knock, power loss, poor mileage, and emissions concerns on vehicles with electronic ignition (distributorless) systems; determine necessary action           P1

AT8C02                Diagnose ignition system related problems such as no-starting, hard starting, engine misfire, poor driveability, spark knock, power loss, poor mileage, and emissions concerns on vehicles with distributor ignition (DI) systems; determine necessary action          P1

AT8C03                Inspect and test ignition primary circuit wiring and solid state components; perform necessary action             P2

AT8C04                                Inspect, test and service distributor             P3

AT8C05                Inspect and test ignition system secondary circuit wiring and components; perform necessary action               P2

AT8C06                                Inspect and test ignition coil(s); perform necessary action  P1

AT8C07                Check and adjust ignition system timing and timing advance/retard (where applicable)       P3

AT8C08                Inspect and test ignition system pick-up sensor or triggering devices; perform necessary action P1

AT8D                    Fuel, Air Induction, and Exhaust Systems Diagnosis and Repair

AT8D01                Diagnose hot or cold no-starting, hard starting, poor driveability, incorrect idle speed, poor idle, flooding, hesitation, surging, engine misfire, power loss, stalling, poor mileage, dieseling, and emissions problems on vehicles with carburetor-type fuel systems; determine necessary action P3  (This task is gone now)

AT8D02                Diagnose hot or cold no-starting, hard starting, poor driveability, incorrect idle speed, poor idle, flooding, hesitation, surging, engine misfire, power loss, stalling, poor mileage, dieseling, and emissions problems on vehicles with injection-type fuel systems; determine necessary action            P1

AT8D03                Check fuel for contaminants and quality; determine necessary action            P3

AT8D04                Inspect and test mechanical and electrical fuel pumps and pump control systems for pressure, regulation and volume; perform necessary action               P1

AT8D05                Replace fuel filters            P1

AT8D06                Inspect and test cold enrichment system and components; perform necessary action               P3

AT8D07                Inspect throttle body, air induction system, intake manifold and gaskets for vacuum leaks and/or unmetered air                P2

AT8D08                Inspect and test fuel injectors        P2

AT8D09                Check idle speed and fuel mixture              P2

AT8D10                Adjust idle speed and fuel mixture             P3

AT8D11                Inspect the integrity of the exhaust manifold, exhaust pipes, muffler(s), catalytic converter(s), resonator(s), tail pipe(s), and heat shield(s); perform necessary action            P2

AT8D12                Perform exhaust system back-pressure test; determine necessary action        P1

AT8D13                Test the operation of turbocharger/supercharger systems; determine necessary action P3

AT8E                     Emissions Control Systems Diagnosis and Repair

AT8E01                                Positive Crankcase Ventilation

AT8E011              Diagnose oil leaks, emissions, and driveability problems resulting from malfunctions in the positive crankcase ventilation (PCV) system; determine necessary action          P2

AT8E012              Inspect, test and service positive crankcase ventilation (PCV) filter/breather cap, valve, tubes, orifices, and hoses; perform necessary action                P2

AT8E02                                Exhaust Gas Recirculation

AT8E021              Diagnose emissions and driveability problems caused by malfunctions in the exhaust gas recirculation (EGR) system; determine necessary action            P1

AT8E022              Inspect, test, service and replace components of the EGR system, including EGR tubing, exhaust passages, vacuum/pressure controls, filters and hoses; perform necessary action        P2

AT8E023              Inspect and test electrical/electronic sensors, controls, and wiring of exhaust gas recirculation (EGR) systems; perform necessary action                P2

AT8E03                                Exhaust Gas Treatment

AT8E031              Diagnose emissions and driveability problems resulting from malfunctions in the secondary air injection and catalytic converter systems; determine necessary action      P2

AT8E032              Inspect and test mechanical components of secondary air injection systems; perform necessary action             P3

AT8E033              Inspect and test electrical/electronically-operated components and circuits of air injection systems; perform necessary action                P3

AT8E034              Inspect and test catalytic converter performance    P1

AT8E04                                Intake Air Temperature Controls

AT8E041              Diagnose emissions and driveability problems resulting from malfunctions in the intake air temperature control system; determine necessary action            P3

AT8E042              Inspect and test components of intake air temperature control system; perform necessary action         P3

AT8E05                                Early Fuel Evaporation (Intake Manifold Temperature) Controls

AT8E051              Diagnose emissions and driveability problems resulting from malfunctions in the early fuel evaporation control system; determine necessary action            P3

AT8E052              Inspect and test components of early fuel evaporation control system; perform necessary action          P3

AT8E06                                Evaporative Emissions Controls

AT8E061              Diagnose emissions and driveability problems resulting from malfunctions in the evaporative emissions control system; determine necessary action            P1

AT8E062              Inspect and test components and hoses of evaporative emissions control system; perform necessary action    P2

AT8E063              Interpret evaporative emission related diagnostic trouble codes (DTCs); determine necessary action  P1

AT8F                     Engine Related Service

AT8F01                 Adjust valves on engines with mechanical or hydraulic lifters         P1

AT8F02                 Remove and replace timing belt; verify correct camshaft timing        P1

AT8F03                 Remove and replace thermostat   P2

AT8F04                 Inspect and test mechanical/electrical fans, fan clutch, fan shroud/ducting, air dams, and fan control devices; perform necessary action                P1