ABS - Integrated Chassis Control

DTC C1233: RF Wheel Speed Sensor Circuit Open Or Shorted (Part 1 Of 2):

DTC C1233: RF Wheel Speed Sensor Circuit Open Or Shorted (Part 2 Of 2):

DTC C1233 Schematic:

CIRCUIT DESCRIPTION
The 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.

CONDITION FOR SETTING THE DTC
The DTC can be set any time the ignition is in the RUN position, and the EBTCM senses an open, a short to ground, or a short to battery.

ACTION TAKEN WHEN THE DTC SETS
A malfunction DTC is stored, ABS/TCS/ICCS is disabled and the ABS and TRACTION CONTROL Indicator lamps are turned ON. Vehicles with ICCS2 will display the STABILITY REDUCED message on the DIC.

CONDITIONS FOR CLEARING THE DTC
Condition for DTC is no longer present and scan tool clear DTC function is used. Fifty start cycles have passed with no DTCs detected.

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 the is broken inside the insulation.

TEST DESCRIPTION
The numbers below refer to step numbers on the diagnostic table.
4. Checks for an open in the WSS.
5. Checks if WSS is shorted to ground.
7. Checks if WSS CKT is shorted to ground.
9. Checks if WSS CKT is shorted to ground.
11. Checks for open in WSS CKTs.