DTC C1145, C1155, C1165, C1175

BHE040243000W21

DTC

C1145

C1155

C1165

C1175

RF ABS wheel-speed sensor (open circuit)

LF ABS wheel-speed sensor (open circuit)

RR ABS wheel-speed sensor (open circuit)

LR ABS wheel-speed sensor (open circuit)

DETECTION CONDITION

• Open circuit has been detected in the ABS wheel-speed sensor or the ABS wheel-speed sensor wiring harness on any of the four vehicle wheels.

POSSIBLE CAUSE

• Open circuit 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 OPEN CIRCUIT

• Turn the ignition switch off.
• Disconnect DSC HU/CM connector.
• Measure resistance between suspected sensor terminals of DSC HU/CM connector (harness-side).
– RF ABS wheel-speed sensor: AC-AE
– LF ABS wheel-speed sensor: AL-AJ
– RR ABS wheel-speed sensor: AF-AI
– LR ABS wheel-speed sensor: AH-AK
• Is the resistance normal?

Resistance

Front ABS wheel-speed sensor:
0.79-2.2 kilohms
Rear ABS wheel-speed sensor:
1.3-1.7 kilohms
Yes
Go to Step 4.
No
Go to the next step.
2

INSPECT ABS WHEEL-SPEED SENSOR

• Turn the ignition switch off.
• Disconnect suspected sensor connectors and inspect resistance between sensor terminals (part-side).
• Is the resistance normal?

Resistance

Front ABS wheel-speed sensor:
0.79-2.2 kilohms
Rear ABS wheel-speed sensor:
1.3-1.7 kilohms
Yes
Go to the next step.
No
Replace the ABS wheel-speed sensor, then go to Step 4.
3

INSPECT DSC HU/CM TO ABS WHEEL-SPEED SENSOR FOR OPEN CIRCUIT

• Inspect for continuity between suspected sensor terminals of DSC HU/CM connector (harness-side) and ABS wheel-speed sensor connector. (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 poor connections of DSC HU/CM connector and/or ABS wheel-speed sensor connectors, then go to the next step.
No
Repair or replace the wiring harness for open circuits between DSC HU/CM and ABS wheel-speed sensors, then go to the next step.
4

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.
5

VERIFY AFTER REPAIR PROCEDURE

• Are any other DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC Table.)
No
DTC troubleshooting completed.