SAAB WIS ONLINE

PRE-RELEASE

INSPECTION

INSPECTION

Symptom Probable faulty units/parts
Vehicle instability during braking

Vehicle pulls to either side.


ABSCM&H/U (solenoid valve)

ABS wheel speed 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 wheel speed sensor

Brake (pads)

Tire specifications, tire wear and air pressures

Incorrect wiring or piping connections


Poor braking

Long braking/stopping distance


ABSCM&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 wheel speed sensor

Incorrect wiring or piping connections


Brake dragging


ABSCM&H/U (solenoid valve)

ABS wheel speed sensor

Master cylinder

Brake (caliper & piston)

Parking brake

Axle & wheels

Brake pedal play


Long brake pedal stroke


Air in brake line

Brake pedal play


Vehicle pitching


Suspension play or fatigue (reduced damping)

Incorrect wiring or piping connections

Road surface (uneven)


Unstable or uneven braking


ABSCM&H/U (solenoid valve)

ABS wheel speed 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 vibration


Incorrect wiring or piping connections

Road surface (uneven)


Noise from ABSCM&H/U


ABSCM&H/U (mount bushing)

ABS wheel speed sensor

Brake piping


Noise from front of vehicle


ABSCM&H/U (mount bushing)

ABS wheel speed sensor

Master cylinder

Brake (caliper & piston, pads, rotor)

Brake piping

Brake booster & check valve

Suspension play or fatigue


Noise from rear of vehicle


ABS wheel speed sensor

Brake (caliper & piston, pads, rotor)

Parking brake

Brake piping

Suspension play or fatigue




PRE-RELEASE