ASE A4 common mistakes
ASE A4 · Understand the traps and how to avoid them.
Adjusts toe first and treats toe as the only alignment angle, skipping ride-height, camber, caster, and thrust-angle checks.
Toe is the easiest and most visible adjustment, so candidates jump to tie-rod turning before verifying the conditions that affect toe and steering-wheel position.
What to do instead
Follow the alignment sequence: inspect and set ride height, check subframe/thrust angle, adjust camber and caster, then set toe last with the steering wheel centered.
Centers an off-center steering wheel by turning only one tie rod or by unequal tie-rod adjustment without checking steering-angle sensor or clockspring position.
The steering wheel looks like a simple toe problem, so candidates correct the visible symptom without considering tie-rod equalization, bump steer, or steering-angle sensor calibration.
What to do instead
Center the steering wheel and secure it, adjust each tie rod equally in opposite directions to set toe, then verify/calibrate the steering-angle sensor if equipped.
Condemns a ball joint by prying it while the suspension is hanging at full droop or by prying in the wrong direction.
Unloaded suspension changes ball-joint geometry and can show false play; candidates may also pry against a spring-loaded joint instead of measuring specified axial/radial play.
What to do instead
Use the OEM inspection procedure: load the suspension at normal ride height where required, pry/measure in the specified direction, and compare against the service limit.
Chases a pull or vibration with alignment only, without road-testing, checking tire pressure/size matching, or measuring tire/wheel runout and conicity.
Tire defects, mismatched tires, and runout can mimic alignment problems, and alignment cannot correct a tire-induced pull or vibration.
What to do instead
Road-test and inspect tires first: verify pressure and size, swap tires side-to-side or front-to-rear, measure radial/axial runout, and correct tire/wheel issues before alignment.
Replaces a power steering pump for whine or poor assist without checking fluid level, aeration/bleeding, belt condition, and pressure/flow.
Low fluid, air in the system, a slipping belt, or a restricted line can produce the same symptoms as a failed pump.
What to do instead
Check and correct fluid level, bleed air per OEM procedure, inspect the belt and pulley, and perform pressure/flow testing before condemning the pump.
Attempts to adjust camber or caster to specification without first measuring ride height and inspecting for subframe shift or damaged suspension components.
Ride height and subframe position change camber, caster, and thrust angle; adjusting alignment on a bent or mislocated foundation produces a false result.
What to do instead
Measure ride height against specification, inspect for subframe shift/collision damage, correct ride-height or subframe issues first, then perform the alignment.
Reuses torque-to-yield suspension fasteners or tightens rubber-bushing pivot bolts with the suspension at full droop.
Candidates treat all fasteners as reusable and tighten bushings in the easiest position, which twists the rubber and can cause premature failure or incorrect ride height.
What to do instead
Replace torque-to-yield fasteners per OEM, and torque bushing pivot bolts at normal ride height with the suspension loaded unless the service procedure states otherwise.
Services the steering column or clockspring without disabling the SRS and without locking/centering the steering wheel.
The airbag and clockspring are easily damaged during column work, and candidates may not follow the required SRS disable and steering-lock precautions.
What to do instead
Disable the SRS per OEM procedure, wait the specified time, lock the steering wheel in the centered position, and center/index the clockspring before reassembly.
Completes an alignment or steering-column repair without resetting/calibrating the steering-angle sensor or reinitializing ADAS features.
Mechanical alignment alone does not update the electronic zero point; candidates may not scan for steering-angle or stability-control codes after repairs.
What to do instead
Use a scan tool to clear codes and perform steering-angle sensor calibration/relearn and any required ADAS or stability-control initialization after alignment or column work.
Mounts directional or asymmetric tires backward or skips TPMS relearn after tire/wheel service.
Candidates focus on mounting and balancing and overlook sidewall direction/outboard markings and the need to register sensor IDs.
What to do instead
Match directional arrows and asymmetric outboard markings during mounting, then perform the specified TPMS relearn and verify pressures.