ASE 4: SUSPENSION AND STEERING

General
MAST4001 Research vehicle service information such as fluid type, vehicle service history, service precautions, technical service bulletins, and recalls including vehicles equipped with advanced driver assistance systems (ADAS).
MAST4002 Identify suspension and steering system components and configurations.
MAST4058 Retrieve and record DTCs, OBD monitor status, and freeze frame data; clear codes and data when directed.
MAST4003 Disable and enable supplemental restraint system (SRS)
MAST4059 Identify and interpret suspension and steering system concerns
Steering Systems
MAST4010 Inspect rack and pinion steering gear tie rod ends (sockets) and bellows boots
MAST4011 Inspect power steering fluid level and condition.
MAST4012 Drain and replace power steering system fluid
MAST4013 Inspect for power steering fluid leakage
MAST4014 Remove, inspect, replace, and/or adjust power steering pump drive belt.
MAST4017 Inspect, remove, and/or replace power steering hoses and fittings.
MAST4018 Inspect, remove, and/or replace pitman arm, relay (centerlink/intermediate) rod, idler arm, mountings, and steering linkage damper.
MAST4019 Inspect, replace, and/or adjust tie rod ends (sockets), tie rod sleeves, and clamps (non-rack and pinion).
MAST4020 Inspect and test electric power steering system
MAST4004 Remove and replace steering wheel
MAST4005 Diagnose steering column noises, looseness, and binding concerns (including tilt/telescoping mechanisms); determine needed action.
MAST4006 Diagnose power steering gear (non-rack and pinion) binding, uneven turning effort, looseness, hard steering, and noise concerns; determine needed action.
MAST4007 Diagnose power steering gear (rack and pinion) binding, uneven turning effort, looseness, hard steering, and noise concerns; determine needed action.
MAST4008 Inspect steering shaft universal joint(s), flexible coupling(s), collapsible column, lock cylinder mechanism, and steering wheel; determine needed action.
MAST4009 Remove and replace rack and pinion steering gear
MAST4015 Remove and reinstall power steering pump.
MAST4016 Remove and reinstall press fit power steering pump pulley
MAST4022 Test power steering system pressure
Suspension Systems
MAST4025 Inspect, remove, and/or replace upper and/or lower control arms, bushings, and shafts.
MAST4060 Inspect and replace rebound/jounce bumpers.
MAST4026 Inspect, remove, and/or replace track bar, strut rods/radius arms, and related mounts and bushings.
MAST4027 Inspect, remove, and/or replace upper and/or lower ball joints (with or without wear indicators).
MAST4029 Inspect, remove, and/or replace suspension system coil springs and spring insulators.
MAST4030 Inspect, remove, and/or replace torsion bars and mounts.
MAST4031 Inspect, remove, and/or replace front/rear stabilizer bar (sway bar) bushings, brackets, and links.
MAST4032 Inspect, remove, and/or replace strut assembly, strut coil spring, insulators, and upper strut bearing mount.
MAST4034 Inspect, remove, and/or replace components of suspension systems (Coil, Leaf, and Torsion).
MAST4061 Inspect, remove, and/or replace components of electronically controlled suspension systems.
MAST4028 Inspect, remove, and/or replace steering knuckle assemblies.
MAST4023 Diagnose suspension system noises, body sway, and uneven ride height concerns; determine needed action.
Related Suspension and Steering Service
MAST4035 Inspect, remove, and/or replace shock absorbers; inspect mounts and bushings.
MAST4036 Inspect, service, and/or replace front and rear wheel bearings.
MAST4037 Describe the function of electronically controlled suspension and steering systems and components, (i.e., active suspension and stability control).
Wheel Alignment
MAST4039 Perform pre-alignment inspection
MAST4062 Describe four-wheel alignment angles (camber, caster, and toe) and effects on vehicle handling/tire wear.
MAST4040 Prepare vehicle for wheel alignment on alignment machine; perform four-wheel alignment by checking and adjusting front caster, front and rear camber, and toe as required; center steering wheel.
MAST4041 Check toe-out-on-turns (turning radius)
MAST4042 Check steering axis inclination (SAI) and included angle
MAST4043 Check rear wheel thrust angle
MAST4044 Check for front wheel setback
MAST4045 Identify front and/or rear cradle (subframe) misalignment
MAST4046 Reset steering angle sensor.
MAST4038 Diagnose vehicle wander, drift, pull, hard steering, bump steer, memory steer, torque steer, and steering return concerns; determine needed action.
Wheels and Tires
MAST4047 Inspect tire condition/age; identify tire wear patterns; check for correct tire size, application (service-class, load, and speed ratings), and air pressure as listed on the tire information placard/label.
MAST4049 Rotate tires according to manufacturer's recommendation, including vehicles equipped with tire pressure monitoring systems (TPMS).
MAST4052 Dismount, inspect, and remount tire on wheel (with/without TPMS); balance wheel and tire assembly.
MAST4054 Inspect tire and wheel assembly for air loss
MAST4055 Repair tire following tire manufacturer approved procedure.
MAST4056 Identify indirect and direct tire pressure monitoring system (TPMS)
MAST4057 Demonstrate knowledge of steps required to remove and replace sensors (per OEM/sensor manufacturer) in a tire pressure monitoring system (TPMS).
MAST4063 Perform Road Force balance/match mounting.
MAST4048 Diagnose wheel/tire vibration, shimmy, and noise; determine needed action.
MAST4050 Measure wheel, tire, axle flange, and hub runout; determine needed action.
MAST4051 Diagnose tire pull problems
Tasksheets Included From Other ASE Foundation Standards
A0013 Identify vehicle systems which pose a safety hazard during service such as: supplemental restraint systems (SRS), electronic brake control systems, stop/start systems, and remote start systems.