General Diagnostic Table: Inspection
GENERAL DIAGNOSTIC
| Symptom | Main probable cause | Other probable cause | |
|---|---|---|---|
| Poor brake performance | Long braking/stopping distance | VDCH/M VDCCM Brake pads Air in brake line Tire specifications, tire wear and air pressures Incorrect wiring or piping |
ABS wheel speed sensor or clearance of sensor malfunction Defective steering angle sensor or improper neutral position Yaw rate & lateral G sensor installation malfunction Master cylinder Brake caliper Disc rotor Brake pipe Brake booster |
| Wheels will lock-up. | VDCH/M VDCCM ABS wheel speed sensor or clearance of sensor malfunction Incorrect wiring or piping |
Defective steering angle sensor or improper neutral position Yaw rate & lateral G sensor installation malfunction Brake caliper Brake pipe |
|
| Brake drag | VDCH/M VDCCM ABS wheel speed sensor or clearance of sensor malfunction Master cylinder Brake caliper Parking brake Axle & wheels Brake pedal play |
Defective steering angle sensor or improper neutral position Yaw rate & lateral G sensor installation malfunction Brake pads Brake pipe |
|
| Excessive brake pedal stroke | Air in brake line Brake pedal play |
VDCH/M Master cylinder Brake caliper Brake pads Brake pipe Brake booster |
|
| Vehicle pitching | VDCH/M VDCCM Uneven road Suspension play or fatigue (poor damping) Incorrect wiring or piping |
ABS wheel speed sensor or clearance of sensor malfunction Defective steering angle sensor or improper neutral position Yaw rate & lateral G sensor installation malfunction |
|
| Poor brake performance | Unbalance braking or unbalanced brake effect | VDCH/M VDCCM ABS wheel speed sensor or clearance of sensor malfunction Brake caliper Brake pads Uneven road Tire specifications, tire wear and air pressures Incorrect wiring or piping |
ABS wheel speed sensor or clearance of sensor malfunction Defective steering angle sensor or improper neutral position Yaw rate & lateral G sensor installation malfunction Master cylinder Disc rotor Brake pipe Axle & wheels Coronal road/ road with bank Suspension play or fatigue (poor damping) |
Vibration and/or noise
|
Excessive brake pedal vibration Uneven road Incorrect wiring or piping |
VDCH/M Brake booster Suspension play or fatigue (poor damping) |
|
| Noise from VDCH/M | VDCH/M (mount bushing) ABS wheel speed sensor or clearance of sensor malfunction Brake pipe |
VDCCM Defective steering angle sensor or improper neutral position Yaw rate & lateral G sensor installation malfunction |
|
| Noise from the front side of vehicle | VDCH/M (mount bushing) ABS wheel speed sensor or clearance of sensor malfunction Master cylinder Brake caliper Brake pads Disc rotor Brake pipe Brake booster Suspension play or fatigue (poor damping) |
Axle & wheels Tire specifications, tire wear and air pressures |
|
| Noise in compartment | VDCCM Defective steering angle sensor or improper neutral position Yaw rate & lateral G sensor installation malfunction |
||
| Noise from the rear side of vehicle | ABS wheel speed sensor or clearance of sensor malfunction Brake caliper Brake pads Disc rotor Parking brake Brake pipe Suspension play or fatigue (poor damping) |
Axle & wheels Tire specifications, tire wear and air pressures |
|
| Engine does not accelerate or goes into a stall when accelerating suddenly or driving on a slippery surface. | VDCH/M VDCCM ABS wheel speed sensor or clearance of sensor malfunction Master cylinder Brake caliper Parking brake Incorrect wiring or piping |
Defective steering angle sensor or improper neutral position Yaw rate & lateral G sensor installation malfunction Brake pads Brake pipe |
|
| Poor straight stability of TCS | Vehicle goes either left or right from straighten direction. | VDCH/M VDCCM ABS wheel speed sensor or clearance of sensor malfunction Defective steering angle sensor or improper neutral position Yaw rate & lateral G sensor installation malfunction Brake caliper Brake pads Wheel alignment Uneven road Coronal road/ road with bank Tire specifications, tire wear and air pressures Incorrect wiring or piping |
Disc rotor Brake pipe Axle & wheels Suspension play or fatigue (poor damping) |
| Vehicle spin | VDCH/M VDCCM ABS wheel speed sensor or clearance of sensor malfunction Defective steering angle sensor or improper neutral position Yaw rate & lateral G sensor installation malfunction Brake pads Tire specifications, tire wear and air pressures Incorrect wiring or piping |
Brake caliper Brake pipe |
|
| Steering wheel drag while driving | VDCH/M VDCCM ABS wheel speed sensor or clearance of sensor malfunction Defective steering angle sensor or improper neutral position Yaw rate & lateral G sensor installation malfunction Incorrect wiring or piping joint Power steering system |
Brake caliper Brake pads Disc rotor Wheel alignment Uneven road Coronal road/ road with bank Suspension play or fatigue (poor damping) Tire specifications, tire wear and air pressures |
|
| VDC operates while driving normally. | VDCH/M VDCCM ABS wheel speed sensor or clearance of sensor malfunction Defective steering angle sensor or improper neutral position Yaw rate & lateral G sensor installation malfunction Wheel alignment Uneven road Coronal road/ road with bank Suspension play or fatigue (poor damping) Tire specifications, tire wear and air pressures Incorrect wiring or piping Power steering system |
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| VDC warning light/VDC OFF indicator light does not come on when the VDC OFF switch is depressed.
NOTE:
When keep depressing the VDC OFF switch for more than 10 seconds while engine running, VDC OFF indicator light go off and block the later switch operation. To return VDC operation, turn the ignition switch from OFF to ON.
|
Harness VDC warning light/VDC OFF indicator light bulb VDC OFF Switch |
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