PINPOINT TEST B : Wheel Speed Sensor Erratic Signal Faults: Notes
Diagnostic Overview
Wheel Speed Sensor Erratic Signal Faults
Normal Operation and Fault Conditions
The wheel speed sensor utilizes the magnetic strip on the wheel bearing to generate a square wave signal proportional to wheel speed that is sent to the ABS module. The wheel bearing, magnetic strip and wheel speed sensor must be undamaged and free from any contamination to produce a clean signal for use by the ABS module. Also, all 4 tires and wheels must be of the same, manufacturer recommended size for the wheel speed sensor to generate an accurate wheel speed.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| C0030:07 | Left Front Tone Wheel: Mechanical Failure | These DTCs set in continuous memory and on-demand if there is damage to the wheel speed sensor magnetic strip, damage to the wheel bearing, or contamination or deformation of the wheel bearing seal. |
| C0033:07 | Right Front Tone Wheel: Mechanical Failure | |
| C0036:07 | Left Rear Tone Wheel: Mechanical Failure | |
| C0039:07 | Right Rear Tone Wheel: Mechanical Failure | |
| C0031:29 | Left Front Wheel Speed Sensor: Signal Invalid | These DTCs set in continuous memory and on-demand if the wheel speed sensor magnetic strip is damaged, or if the wheel bearing is not installed correctly. These DTCs also set if an incorrectly sized tire is installed on the vehicle or if an incorrect wheel speed sensor or wheel bearing is installed. |
| C0031:64 | Left Front Wheel Speed Sensor: Signal Plausibility Failure | |
| C0034:29 | Right Front Wheel Speed Sensor: Signal Invalid | |
| C0034:64 | Right Front Wheel Speed Sensor: Signal Plausibility Failure | |
| C0037:29 | Left Rear Wheel Speed Sensor: Signal Invalid | |
| C0037:64 | Left Rear Wheel Speed Sensor: Signal Plausibility Failure | |
| C003A:29 | Right Rear Wheel Speed Sensor: Signal Invalid | |
| C003A:64 | Right Rear Wheel Speed Sensor: Signal Plausibility Failure | |
| C0031:2F | Left Front Wheel Speed Sensor: Signal Erratic | These DTCs set in continuous memory and on-demand if the wheel speed sensor magnetic strip is damaged, or if the wheel bearing is not installed correctly. These DTCs also set if an incorrectly sized tire is installed on the vehicle, an incorrect wheel bearing is installed or high frequency interference is present. |
| C0034:2F | Right Front Wheel Speed Sensor: Signal Erratic | |
| C0037:2F | Left Rear Wheel Speed Sensor: Signal Erratic | |
| C003A:2F | Right Rear Wheel Speed Sensor: Signal Erratic |