Automotive Service Technician and Mechanic - 2021
Competency-based
ONET: 49-3023.00
1
Years
99
Skills
On-the-job training
- Occupational Skills - Suspension and Steering
- Research vehicle service information including fluid type.
- Supplemental restraint system (SRS) verify indicator lamp operation.
- Diagnose steering column noises, looseness, and binding concerns (including tilt/telescoping mechanisms).
- Inspect rack and pinion steering gear inner tie rod ends (sockets) and bellows boots; replace as needed.
- Inspect power steering fluid level and condition.
- Flush, fill, and bleed power steering system; use proper fluid type per manufacturer specification.
- Remove, inspect, replace, and adjust power steering pump drive belt.
- Inspect, remove, and replace power steering hoses and fittings.
- Inspect, remove, and replace pitman arm, relay (centerlink/intermediate) rod, idler arm, mountings, and steering linkage damper.
- Inspect, replace, and adjust tie rod ends (sockets), tie rod sleeves, and clamps.
- Inspect, test and diagnose electrically assisted power steering systems.
- Test power steering system pressure; determine needed action.
- Inspect, remove, and replace upper and lower control arms, bushings, shafts, and rebound bumpers.
- Inspect, remove, and replace strut rods and bushings.
- Inspect, remove, and replace upper and/or lower ball joints (with or without wear indicators).
- Inspect, remove, and replace steering knuckle assemblies.
- Inspect, remove, and replace short and long arm suspension system coil springs and spring insulators.
- Inspect, remove, and replace torsion bars and mounts
- Inspect, remove, and replace front/rear stabilizer bar (sway bar) bushings, brackets, and links.
- Inspect, remove, and replace strut cartridge or assembly, strut coil spring, insulators (silencers), and upper strut bearing mount.
- Inspect, remove, and replace track bar, strut rods/radius arms, and related mounts and bushings.
- Inspect rear suspension system leaf spring(s), spring insulators (silencers), shackles, brackets, bushings, center pins/bolts, and mounts.
- Inspect, remove, and replace shock absorbers; inspect mounts and bushings.
- Remove, inspect, service, and replace front and rear wheel bearings.
- Describe the function of suspension and steering control systems and components, (i.e., active suspension and stability control).
- Check steering axis inclination (SAI).
- Inspect tire condition; identify tire wear patterns; check for correct tire size, application (load and speed ratings), and air pressure as listed on the tire information placard/label.
- Rotate tires according to manufacturers’ recommendation including vehicles equipped with tire pressure monitoring systems (TPMS)
- Diagnose tire pull problems; determine needed action.
- Dismount, inspect, and remount tire on wheel equipped with tire pressure monitoring system sensor.
- Repair tire following vehicle manufacturer approved procedure.
- Identify indirect and direct tire pressure monitoring system (TPMS); calibrate system; verify operation of instrument panel lamps.
- Demonstrate knowledge of steps required to remove and replace sensors in a tire pressure monitoring system (TPMS) including relearn procedure
- Occupational Skills - Brakes
- Research vehicle service information including fluid type.
- Diagnose poor stopping, pulling or dragging concerns caused by malfunctions in the hydraulic system; determine needed action.
- Inspect brake lines, flexible hoses, and fittings for leaks, dents, kinks, rust, cracks, bulging, wear, and loose fittings/supports; determine needed action.
- Select, handle, store, and fill brake fluids to proper level; use proper fluid type per manufacturer specification.
- Identify components of hydraulic brake warning light system.
- Remove, clean, and inspect brake drum; measure brake drum diameter; determine serviceability.
- Remove, clean, inspect, and/or replace brake shoes, springs, pins, clips, levers, adjusters/self-adjusters, other related brake hardware, and backing support plates; lubricate and reassemble.
- Pre-adjust brake shoes and parking brake; install brake drums or drum/hub assemblies and wheel bearings; perform final checks and adjustments.
- Remove and clean caliper assembly; inspect for leaks, damage, and wear; determine needed action.
- Inspect caliper mounting and slides/pins for proper operation, wear, and damage; determine needed action.
- Remove, inspect, and replace brake pads and retaining hardware; determine needed action.
- Lubricate and reinstall caliper, brake pads, and related hardware; seat brake pads; inspect for leaks.
- Clean and inspect rotor and mounting surface; measure rotor thickness, thickness variation, and lateral runout; determine needed action.
- Remove and replace rotor. Demonstrate use of on car lathe. Machine rotor.
- Retract and re-adjust caliper piston on an integrated parking brake system.
- Check brake pad wear indicator; determine needed action.
- Identify components of the brake power assist system (vacuum and hydraulic); check vacuum supply (manifold or auxiliary pump) to vacuum-type power booster.
- Diagnose wheel bearing noises, wheel shimmy, and vibration concerns; determine needed action.
- Remove, clean, inspect, repack, and install wheel bearings; replace seals; install hub and adjust bearings.
- Check parking brake system and components for wear, binding, and corrosion; clean, lubricate, adjust and/or replace as needed.
- Replace wheel bearing and race.
- Remove and replace sealed wheel bearing assembly.
- Identify and inspect electronic brake control system components (ABS, TCS, ESC); determine needed action.
- Depressurize high-pressure components of an electronic brake control system.
- Test, diagnose, and service electronic brake control system speed sensors, toothed ring (tone wheel), and circuits using a graphing multimeter (GMM)/digital storage oscilloscope (DSO).
- Diagnose electronic brake control system braking concerns caused by vehicle modifications (tire size, curb height, final drive ratio, etc.).
- Occupational Skills - Electrical/Electronic Systems
- Demonstrate proper use of a test light on an electrical circuit.
- Use fused jumper wires to check operation of electrical circuits.
- Inspect, test, repair, and/or replace components, connectors, terminals, harnesses, and wiring in electrical/electronic systems (including solder repairs); determine needed action. Demonstrate use of digital multimeter.
- Repair data bus wiring harness.
- Confirm proper battery capacity for vehicle application; perform battery capacity and load test; determine needed action.
- Identify safety precautions for high voltage systems on electric, hybrid, hybrid-electric, and diesel vehicles.
- Identify electrical/electronic modules, security systems, radios, and other accessories that require reinitialization or code entry after reconnecting vehicle battery.
- Identify hybrid vehicle auxiliary (12v) battery service, repair, and test procedures.
- Demonstrate knowledge of an automatic idle-stop/start-stop system.
- Inspect, replace, and adjust generator (alternator) drive belts; check pulleys and tensioners for wear; check pulley and belt alignment.
- Remove, inspect, and replace generator (alternator).
- Reset maintenance indicators as required.
- Diagnose operation of comfort and convenience accessories and related circuits (such as: power window, power seats, pedal height, power locks; determine needed repairs.
- Diagnose operation of security/anti-theft systems and related circuits (such as: theft deterrent, door locks, remote keyless entry, remote start, and starter/fuel disable); determine needed repairs.
- Diagnose operation of entertainment and related circuits (such as: radio, DVD, remote CD changer, navigation, amplifiers, speakers, antennas, and voice-activated accessories); determine needed repairs.
- Diagnose operation of safety systems and related circuits (such as: horn, airbags, seat belt pretensioners; determine needed repairs.
- Diagnose body electronic systems circuits using a scan tool; check for module communication errors (data communication bus systems); determine needed action.
- Describe the process for software transfer, software updates, or reprogramming of electronic modules.
- Occupational Skills - Engine Performance
- Research vehicle service information including vehicle service history.
- Diagnose the cause of excessive oil consumption, coolant consumption, unusual exhaust color, odor, and sound; determine needed action.
- Perform engine absolute manifold pressure tests (vacuum/boost); determine needed action.
- Verify correct camshaft timing including engines equipped with variable valve timing systems (VVT).
- Retrieve and record diagnostic trouble codes (DTC), OBD monitor status, and freeze frame data; clear codes when applicable.
- Perform active tests of actuators using a scan tool; determine needed action.
- Describe the use of OBD monitors for repair verification.
- Diagnose the causes of emissions or drivability concerns with stored or active diagnostic trouble codes (DTC); obtain, graph, and interpret scan tool data.
- Diagnose emissions or drivability concerns without stored or active diagnostic trouble codes; determine needed action.
- Diagnose drivability and emissions problems resulting from malfunctions of interrelated systems (cruise control, security alarms, suspension controls, traction controls; determine needed action.
- Inspect, test, and/or replace ignition control module, powertrain/engine control module; reprogram/initialize as needed.
- Replace fuel filter(s).
- Inspect, test, and replace fuel injectors.
- Inspect condition of exhaust system hangers, brackets, clamps, and heat shields; determine needed action.
- Check and refill diesel exhaust fluid (DEF).
- Test the operation of turbocharger/supercharger systems; determine needed action.
- Inspect, test, service, and replace positive crankcase ventilation (PCV) filter/breather, valve, tubes, orifices, and hoses; perform needed action.
- Diagnose emissions and drivability concerns caused by the exhaust gas recirculation (EGR) system; inspect, test, service, and replace the components of the EGR system; determine needed action.
- Diagnose emissions and drivability concerns caused by the secondary air injection system; inspect, test, repair, and replace electrical/electronically-operated components and circuits of secondary air injection systems; determine needed action.
- Diagnose emissions and drivability concerns caused by the evaporative emissions control (EVAP) system; determine needed action.
- Diagnose emission and drivability concerns caused by catalytic converter system; determine needed action.
- Interpret diagnostic trouble codes (DTCs) and scan tool data related to the emissions control systems; determine needed action.
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