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.
3

VERIFY TROUBLESHOOTING COMPLETED

• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the memory.
• Are the same DTCs present?
Yes
Replace the DSC HU/CM, then go to the next step.
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.