Antilock Braking System (ABS)

DTC 32, 33, 34, & 35 Wheel Speed Sensor Circuit Open Or Shorted (Part 1 0f 2):

DTC 32, 33, 34, & 35 Wheel Speed Sensor Circuit Open Or Shorted (Part 2 Of 2):

DTC's 32, 33, 34, & 35 Wheel Speed Sensor Circuit Open Or Shorted:

CIRCUIT DESCRIPTION
As a toothed ring passes by the wheel speed sensor, changes in the electromagnetic field cause the wheel speed sensor to produce an AC voltage signal whose frequency is proportional to wheel speed. The magnitude of this signal is directly related to wheel speed and the proximity of the wheel speed sensor to the toothed ring often referred to as the air gap.

DTC WILL SET WHEN
DTC can be set anytime after initialization. If either of the wheel speed circuits are open or shorted to voltage or ground, a malfunction exists.

ACTION TAKEN
A malfunction DTC is stored, ABS/TCS is disabled and the "ANTILOCK" and "TRACTION OFF" Indicator lamps are turned "ON."

DTC CHART TEST DESCRIPTION
Number(s) below refer to circled number(s) on the diagnostic chart.
1. Checks for proper resistance of the wheel speed sensor coil.
2. Checks for a short to ground in the wheel speed sensor wiring.
3. Checks for a short to voltage in the wheel speed sensor wiring.
4. Checks for a short to voltage in the WSS CKT.
5. Ensures that the malfunction was not due to physical damage of the circuitry.

DIAGNOSTIC AIDS
Possible causes:
- Wheel speed sensor circuit open.
- Wheel speed sensor circuit shorted to ground.
- Wheel speed sensor circuit shorted to voltage greater than 4 volts.

An intermittent malfunction may be caused by a poor connection, rubbed through wire insulation, or a wire that is broken inside the insulation.

If the customer's comments reflect that the ABS or TCS warning lamps are "ON" only during moist environmental changes (rain, snow, vehicle wash), all wheel speed sensor circuitry should be thoroughly inspected for signs of water intrusion.

Any circuitry that is suspected of causing the intermittent complaint should be thoroughly checked for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, poor terminal to wiring connections or physical damage to the wiring harness.