Code 32/33/34/35 - Wheel Speed Sensor Circuit Open Or Shorted To Battery Or Ground: Notes
- Code 32 - Left Front Wheel
- Code 33 - Right Front Wheel
- Code 34 - Left Rear Wheel
- Code 35 - Right Rear Wheel
NOTE:
On vehicles without traction control, only Code 35 will be displayed in the event of a rear wheel sensor fault.
As toothed ring passes wheel speed sensor, changes in magnetic field causes wheel speed sensor to produce an AC voltage signal whose frequency is proportional to wheel speed. The magnitude of the signal is directly related to wheel speed and proximity of wheel speed sensor to toothed ring, referred to as air gap. EBCM uses this signal to compare individual wheel speed data and to detect wheel lock-up.
Code 32 can set anytime after initialization if front wheel speed sensor circuits are open or shorted to voltage or ground. Code will be stored, ABS will be disabled and ABS warning light will be illuminated.
NOTE:
Test numbers refer to numbers on diagnostic chart. Use only 10-megohm (minimum) DVOM for all voltage and resistance tests. For identification of circuits and terminals referenced in charts and text, see WIRING DIAGRAMS .
- Checks if sensor resistance is correct.
- Checks for short to ground in wheel speed sensor wiring.
- Checks for short to voltage in wheel speed sensor wiring.
- Checks for short to voltage in EBCM wheel speed signal low circuit.
- Checks for short to voltage in EBCM wheel speed signal high circuit.
- Ensures malfunction is not due to physical damage of circuitry.