C1235

C1234 RR Wheel Speed Circuit Open or Shorted

Part 1 Of 2:

Part 2 Of 2:

CIRCUIT DESCRIPTION
The wheel speed sensor used on this vehicle is a single point magnetic pickup. This sensor produces an AC signal that the EBTCM uses the frequency from to calculate the wheel speed.

CONDITIONS FOR SETTING THE DTC
All of the following conditions occur:
^ The ignition is ON.
^ The EBTCM detects one of the following conditions:
^ An open
^ A short to ground
^ A short to voltage

ACTION TAKEN WHEN THE DTC SETS
^ A malfunction DTC is stored.
^ The ABS/TCS/Stabilitrak is disabled.
^ The ABS indicator is turned ON.
^ The TRACTION CONTROL indicator is turned ON.
^ The DIC displays the SERVICE STABILITY SYS message.

CONDITIONS FOR CLEARING THE DTC
^ The condition for DTC is no longer present and you used scan tool Clear DTCs function.
^ The condition for DTC is no longer present and you used the On-Board Clear DTCs function.
^ The EBTCM does not detect the DTC in 50 drive cycles.

DIAGNOSTIC AIDS
^ It is very important that a thorough inspection of the wiring and connectors be performed. Failure to carefully and fully inspect wiring and connectors may result in misdiagnosis, causing part replacement with reappearance of the malfunction.
^ An intermittent malfunction can be caused by poor connections, broken insulation, or a wire that is broken inside the insulation.
^ If an intermittent malfunction exists, refer to Intermittents and Poor Connections Diagnosis in Wiring Systems.

TEST DESCRIPTION
The numbers below refer to step numbers on the diagnostic table.
4. This step checks for an open in the wheel speed sensor or circuit.
12. This step checks for a short to ground in the wheel speed sensor or circuit.
19. This step checks for a short to voltage in the wheel speed sensor high circuit.
21. This step checks for a short to voltage in the wheel speed low sensor circuit.