DTC C1145, C1155, C1165, C1175 [ABS]

id0402a7805700

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 ABS HU/CM terminals and ABS wheel-speed sensor terminals:
―  ABS HU/CM terminal Q—RF ABS wheel-speed sensor terminal A
―  ABS HU/CM terminal O—RF ABS wheel-speed sensor terminal B
―  ABS HU/CM terminal I—LF ABS wheel-speed sensor terminal A
―  ABS HU/CM terminal K—LF ABS wheel-speed sensor terminal B
―  ABS HU/CM terminal E—RR ABS wheel-speed sensor terminal A
―  ABS HU/CM terminal C—RR ABS wheel-speed sensor terminal B
―  ABS HU/CM terminal U—LR ABS wheel-speed sensor terminal A
―  ABS HU/CM terminal W—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 ABS HU/CM connectors.
•  Inspect for continuity between the following ABS HU/CM connector terminals (vehicle harness-side) and body ground:
―  RF ABS wheel-speed sensor(+): Q
―  RF ABS wheel-speed sensor(-): O
―  LF ABS wheel-speed sensor(+): I
―  LF ABS wheel-speed sensor(-): K
―  RR ABS wheel-speed sensor(+): E
―  RR ABS wheel-speed sensor(-): C
―  LR ABS wheel-speed sensor(+): U
―  LR ABS wheel-speed sensor(-): W
•  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 ABS HU/CM connector terminals (vehicle harness-side) and body ground:
―  RF ABS wheel-speed sensor(+): Q
―  RF ABS wheel-speed sensor(-): O
―  LF ABS wheel-speed sensor(+): I
―  LF ABS wheel-speed sensor(-): K
―  RR ABS wheel-speed sensor(+): E
―  RR ABS wheel-speed sensor(-): C
―  LR ABS wheel-speed sensor(+): U
―  LR ABS wheel-speed sensor(-): W
•  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.
(See FRONT ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION.)
(See REAR ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION.)
3
INSPECT FOR OPEN CIRCUIT IN ABS WHEEL-SPEED SENSOR WIRING HARNESS
•  Inspect for continuity between the ABS HU/CM connectors (vehicle harness-side) and the following vehicle harness-side connector terminals of the ABS wheel-speed sensors:
―  RF ABS wheel-speed sensor(+): Q—A
―  RF ABS wheel-speed sensor(-): O—B
―  LF ABS wheel-speed sensor(+): I—A
―  LF ABS wheel-speed sensor(-): K—B
―  RR ABS wheel-speed sensor(+): E—A
―  RR ABS wheel-speed sensor(-): C—B
―  LR ABS wheel-speed sensor(+): U—A
―  LR ABS wheel-speed sensor(-): W—B
•  Is there continuity?
Yes
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.)
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 ABS CM, then go to the next step.
(See ABS HU/CM REMOVAL/INSTALLATION.)
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 ON-BOARD DIAGNOSIS [ABS].)
No
DTC troubleshooting completed.