DTC C1145, C1155, C1165, C1175 [ABS/TCS]

id040214801100

Caution
• When attaching the tester lead to the ABS (ABS/TCS) HU/CM harness connector, the SST (49 G066 001) must be used. (See ABS (ABS/TCS) HU/CM INSPECTION.)

DTC

C1145

C1155

C1165

C1175

RF ABS wheel-speed sensor

LF ABS wheel-speed sensor

RR ABS wheel-speed sensor

LR ABS wheel-speed sensor

DETECTION CONDITION

• Abnormal input is detected.

POSSIBLE CAUSE

• Open or short to ground circuit in harness between ABS (ABS/TCS) HU/CM terminal and ABS wheel-speed sensor(s) terminal below
- ABS (ABS/TCS) HU/CM terminal G-RF ABS wheel-speed sensor terminal A
- ABS (ABS/TCS) HU/CM terminal D-RF ABS wheel-speed sensor terminal B
- ABS (ABS/TCS) HU/CM terminal I-LF ABS wheel-speed sensor terminal A
- ABS (ABS/TCS) HU/CM terminal E-LF ABS wheel-speed sensor terminal B
- ABS (ABS/TCS) HU/CM terminal A-RR ABS wheel-speed sensor terminal A
- ABS (ABS/TCS) HU/CM terminal B-RR ABS wheel-speed sensor terminal B
- ABS (ABS/TCS) HU/CM terminal C-LR ABS wheel-speed sensor terminal A
- ABS (ABS/TCS) HU/CM terminal F-LR ABS wheel-speed sensor terminal B
• ABS wheel-speed sensor(s) malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
INSPECT ABS WHEEL-SPEED SENSOR CIRCUIT FOR OPEN CIRCUIT
• Turn ignition key to OFF.
• Disconnect ABS (ABS/TCS) HU/CM connector.
• Measure resistance between suspected sensor terminals of ABS (ABS/TCS) HU/CM connector (harness side).
- RF ABS wheel-speed sensor: G-D
- LF ABS wheel-speed sensor: I-E
- RR ABS wheel-speed sensor: A-B
- LR ABS wheel-speed sensor: C-F
• Is resistance within 1.3-1.7 kilohm?
Yes
Go to next step.
No
Go to Step 3.
2
INSPECT ABS WHEEL-SPEED SENSOR CIRCUIT FOR SHORT TO GROUND
• Turn ignition key to OFF.
• Inspect continuity between suspected sensor terminal(s) of ABS (ABS/TCS) HU/CM connector (harness side) and ground(s).
- RF ABS wheel-speed sensor (+): G
- RF ABS wheel-speed sensor (-): D
- LF ABS wheel-speed sensor (+): I
- LF ABS wheel-speed sensor (-): E
- RR ABS wheel-speed sensor (+): A
- RR ABS wheel-speed sensor (-): B
- LR ABS wheel-speed sensor (+): C
- LR ABS wheel-speed sensor (-): F
• Is there continuity?
Yes
Repair or replace harness for short to ground circuit between ABS (ABS/TCS) HU/CM and ABS wheel-speed sensor(s), then go to Step 5.
No
Go to Step 5.
3
INSPECT ABS WHEEL-SPEED SENSOR
• Turn ignition key to OFF.
• Disconnect suspected sensor connector(s) and inspect resistance between sensor terminals (part side).
• Is resistance within 1.3-1.7 kilohm?
Yes
Go to next step.
No
Replace ABS wheel-speed sensor, then go to Step 5.
4
INSPECT ABS (ABS/TCS) HU/CM TO ABS WHEEL-SPEED SENSOR CIRCUIT FOR OPEN CIRCUIT
• Inspect continuity between suspected sensor terminal(s) of ABS (ABS/TCS) HU/CM connector (harness side) and ABS wheel-speed sensor connector. (vehicle harness side)
- RF ABS wheel-speed sensor (+): G-A
- RF ABS wheel-speed sensor (-): D-B
- LF ABS wheel-speed sensor (+): I-A
- LF ABS wheel-speed sensor (-): E-B
- RR ABS wheel-speed sensor (+): A-A
- RR ABS wheel-speed sensor (-): B-B
- LR ABS wheel-speed sensor (+): C-A
- LR ABS wheel-speed sensor (-): F-B
• Is there continuity?
Yes
Repair or replace poor connections of ABS (ABS/TCS) HU/CM connector and/or ABS wheel-speed sensor connector(s), then go to next step.
No
Repair or replace harness for open circuits between ABS (ABS/TCS) HU/CM and ABS wheel-speed sensor(s), then go to next step.
5
VERIFY TROUBLESHOOTING COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear DTC from memory
• Is same DTC present?
Yes
Replace ABS (ABS/TCS) HU/CM, then go to next step.
No
Go to next step.
6
VERIFY AFTER REPAIR PROCEDURE
• Is there any other DTC present?
Yes
Go to applicable DTC inspection.
No
Troubleshooting completed.