Tasksheets

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.