DTC C1145, C1155, C1165, C1175 [DSC]

B3E040243000W19

DTC

C1145, C1155, C1165, C1175

ABS wheel-speed sensor

DETECTION CONDITION

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

POSSIBLE CAUSE

• Open circuit or short to ground in the wiring harness between the following DSC HU/CM terminals and the ABS wheel-speed sensor terminals:
- DSC HU/CM terminal AP-RF ABS wheel-speed sensor terminal A
- DSC HU/CM terminal AS-RF ABS wheel-speed sensor terminal B
- DSC HU/CM terminal I-LF ABS wheel-speed sensor terminal A
- DSC HU/CM terminal F-LF ABS wheel-speed sensor terminal B
- DSC HU/CM terminal O-RR ABS wheel-speed sensor terminal A
- DSC HU/CM terminal R-RR ABS wheel-speed sensor terminal B
- DSC HU/CM terminal AJ-LR ABS wheel-speed sensor terminal A
- DSC HU/CM terminal AG-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 the DSC HU/CM connectors.
• Inspect for continuity between the following DSC HU/CM connector terminals (vehicle harness-side) and body ground:
- RF ABS wheel-speed sensor(+): AP
- RF ABS wheel-speed sensor(-): AS
- LF ABS wheel-speed sensor(+): I
- LF ABS wheel-speed sensor(-): F
- RR ABS wheel-speed sensor(+): O
- RR ABS wheel-speed sensor(-): R
- LR ABS wheel-speed sensor(+): AJ
- LR ABS wheel-speed sensor(-): AG
• Is there continuity?
Yes
Go to the next step.
No
Go to Step 3.
2
INSPECT ABS WHEEL-SPEED SENSOR WIRING HARNESS FOR SHORT TO GROUND
• Disconnect the ABS wheel-speed sensor connectors.
• Inspect for continuity between the following DSC HU/CM connector terminals (vehicle harness-side) and body ground:
- RF ABS wheel-speed sensor(+): AP
- RF ABS wheel-speed sensor(-): AS
- LF ABS wheel-speed sensor(+): I
- LF ABS wheel-speed sensor(-): F
- RR ABS wheel-speed sensor(+): O
- RR ABS wheel-speed sensor(-): R
- LR ABS wheel-speed sensor(+): AJ
- LR ABS wheel-speed sensor(-): AG
• Is there continuity?
Yes
Repair or replace the wiring harness, then go to Step 4.
No
Replace the ABS wheel-speed sensor, then go to Step 4.
3
INSPECT ABS WHEEL-SPEED SENSOR WIRING HARNESS FOR OPEN CIRCUIT
• Inspect for continuity between the DSC HU/CM connectors (vehicle harness-side) and the following vehicle harness-side terminals of ABS wheel-speed sensors:
- RF ABS wheel-speed sensor(+): AP-A
- RF ABS wheel-speed sensor(-): AS-B
- LF ABS wheel-speed sensor(+): I-A
- LF ABS wheel-speed sensor(-): F-B
- RR ABS wheel-speed sensor(+): O-A
- RR ABS wheel-speed sensor(-): R-B
- LR ABS wheel-speed sensor(+): AJ-A
- LR ABS wheel-speed sensor(-): AG-B
• Is there continuity?
Yes
Go to the next step.
No
Replace the ABS wheel-speed sensor, then go to the next step.
4
VERIFY THAT THE SAME DTC IS NOT PRESENT
• Reconnect all disconnected connectors.
• Clear the DTCs from the memory.
• Are the same DTCs present?
Yes
Repeat the inspection from Step 1.
If the malfunction recurs, replace the DSC HU/CM, then go to the next step.
No
Go to the next step.
5
VERIFY THAT NO OTHER DTCS ARE PRESENT
• Are any other DTCs output?
Yes
Go to the applicable DTC inspection.
(See DTC Table.)
No
DTC troubleshooting completed.