11. General Diagnostics Table
A: SYMPTOMS AND PROBABLE CAUSES
Symptom Probable faulty units/parts
Vehicle instability during brakingVehicle pulls to either side.ABSCM&H/U (solenoid valve)
ABS sensor
Brake (caliper & piston, pads)
Wheel alignment
Tire specifications, tire wear and air pressures
Incorrect wiring or piping connections
Road surface (uneven, camber)
Vehicle spins.ABSCM&H/U (solenoid valve)
ABS sensor
Brake (pads)
Tire specifications, tire wear and air pressures
Incorrect wiring or piping connections
Poor brakingLong braking/stopping distanceABSCM&H/U (solenoid valve)
Brake (pads)
Air in brake line
Tire specifications, tire wear and air pressures
Incorrect wiring or piping connections
Wheel locks.ABSCM&H/U (solenoid valve, motor)
ABS sensor
Incorrect wiring or piping connections
Brake draggingABSCM&H/U (solenoid valve)
ABS sensor
Master cylinder
Brake (caliper & piston)
Parking brake
Axle & wheels
Brake pedal play
Long brake pedal strokeAir in brake line
Brake pedal play
Vehicle pitchingSuspension play or fatigue (reduced damping)
Incorrect wiring or piping connections
Road surface (uneven)
Unstable or uneven brakingABSCM&H/U (solenoid valve)
ABS sensor
Brake (caliper & piston, pads)
Tire specifications, tire wear and air pressures
Incorrect wiring or piping connections
Road surface (uneven)
Vibration and/or noise (while
driving on slippery roads)Excessive pedal vibrationIncorrect wiring or piping connections
Road surface (uneven)
Noise from ABSCM&H/UABSCM&H/U (mount bushing)
ABS sensor
Brake piping
Noise from front of vehicleABSCM & H/U (mount bushing)
ABS sensor
Master cylinder
Brake (caliper & piston, pads, rotor)
Brake piping
Brake booster & check valve
Suspension play or fatigue
Noise from rear of vehicleABS sensor
Brake (caliper & piston, pads, rotor)
Parking brake
Brake piping
Suspension play or fatigue
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4-4dBRAKES [ABS 5.3i TYPE]
11. General Diagnostics Table
