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DTC C1233, C1234, C1235, C1236

BHE040243000W26

DTC | C1233 C1234 C1235 C1236 | LF ABS wheel-speed sensor (short to ground) RF ABS wheel-speed sensor (short to ground) RR ABS wheel-speed sensor (short to ground) LR ABS wheel-speed sensor (short to ground)
DETECTION CONDITION | • C1233, C1234, C1235, C1236 – The vehicle wheel speed of any of the four vehicle wheels is 2.75 km/h {1.71 mph} or less when driving at the specified vehicle speed or more.
POSSIBLE CAUSE | • Short to ground in the wiring harness between the following DSC HU/CM terminal and the ABS wheel-speed sensor terminal: – DSC HU/CM terminal AC-RF ABS wheel-speed sensor terminal A – DSC HU/CM terminal AE-RF ABS wheel-speed sensor terminal B – DSC HU/CM terminal AL-LF ABS wheel-speed sensor terminal A – DSC HU/CM terminal AJ-LF ABS wheel-speed sensor terminal B – DSC HU/CM terminal AF-RR ABS wheel-speed sensor terminal A – DSC HU/CM terminal AI-RR ABS wheel-speed sensor terminal B – DSC HU/CM terminal AH-LR ABS wheel-speed sensor terminal A – DSC HU/CM terminal AK-LR ABS wheel-speed sensor terminal B • ABS wheel-speed sensor malfunction • Poor connection at connectors (female terminal)

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | INSPECT ABS WHEEL-SPEED SENSOR FOR SHORT TO GROUND • Turn the ignition switch off. • Disconnect DSC HU/CM connector. • Inspect for continuity between suspected sensor terminals of DSC HU/CM connector (harness-side) and grounds. – RF ABS wheel-speed sensor (+): AC – RF ABS wheel-speed sensor (-): AE – LF ABS wheel-speed sensor (+): AL – LF ABS wheel-speed sensor (-): AJ – RR ABS wheel-speed sensor (+): AF – RR ABS wheel-speed sensor (-): AI – LR ABS wheel-speed sensor (+): AH – LR ABS wheel-speed sensor (-): AK • Is there continuity? | Yes | Go to the next step.
No | Go to Step 3.
2 | INSPECT DSC HU/CM TO ABS WHEEL-SPEED SENSOR FOR SHORT TO GROUND • Inspect for continuity between suspected sensor terminals of DSC HU/CM connector (harness-side) and ABS wheel-speed sensor connectors (vehicle harness-side). – RF ABS wheel-speed sensor (+): AC-A – RF ABS wheel-speed sensor (-): AE-B – LF ABS wheel-speed sensor (+): AL-A – LF ABS wheel-speed sensor (-): AJ-B – RR ABS wheel-speed sensor (+): AF-A – RR ABS wheel-speed sensor (-): AI-B – LR ABS wheel-speed sensor (+): AH-A – LR ABS wheel-speed sensor (-): AK-B • Is there continuity? | Yes | Repair or replace the wiring harness for short to ground s between DSC HU/CM and ABS wheel-speed sensors, then go to the next step.
No | Replace the ABS wheel-speed sensor, then go to the next step. (See FRONT ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION.) (See REAR ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION.)
3 | VERIFY TROUBLESHOOTING COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the memory. (See Clearing DTCs Procedures.) • Are the same DTCs present? | Yes | Replace the DSC HU/CM, then go to the next step. (See DSC HU/CM REMOVAL/INSTALLATION.)
No | Go to the next step.
4 | VERIFY AFTER REPAIR PROCEDURE • Are any other DTCs present? | Yes | Go to the applicable DTC inspection. (See DTC Table.)
No | DTC troubleshooting completed.