DTC C1145, C1155, C1165, C1175[AJ (3.0L Duratec)]

id040242805700

DTC
C1145, C1155, C1165, C1175
ABS wheel-speed sensor
MALFUNCTION
•  C1145
―  ABS wheel-speed sensor (RF) circuit malfunction
•  C1155
―  ABS wheel-speed sensor (LF) circuit malfunction
•  C1165
―  ABS wheel-speed sensor (RR) circuit malfunction
•  C1175
―  ABS wheel-speed sensor (LR) circuit malfunction

Diagnostic Procedure

STEP

INSPECTION

ACTION
1
INSPECT FOR SHORT TO POWER SUPPLY
•  Turn the ignition switch off.
•  Disconnect the ABS HU/CM connectors.
•  Turn the ignition switch to the ON position.
•  Measure the resistance between the following ABS HU/CM terminals and body ground.
―  C1145 (RF): terminal P and S
―  C1155 (LF): terminal U and X
―  C1165 (RR): terminal J and G
―  C1175 (LR): terminal I and L
•  Is there voltage?
Yes
•  Repair or replace the suspect ABS wheel-speed sensor circuit, and clear DTC from the memory.
No
•  Go to the next step.
2
INSPECT FOR SHORT TO GROUND
•  Turn the ignition switch off.
•  Measure the resistance between the following ABS HU/CM terminals and body ground.
―  C1145 (RF): terminal P and S
―  C1155 (LF): terminal U and X
―  C1165 (RR): terminal J and G
―  C1175 (LR): terminal I and L
•  Is the resistance more than 10,000 ohms?
Yes
•  Go to the next step.
No
•  Repair or replace the suspect ABS wheel-speed sensor circuit, and clear DTC from the memory.
3
I INSPECT FOR OPEN CIRCUIT
•  Turn the ignition switch off.
•  Disconnect the suspect ABS wheel-speed sensor connector.
•  Measure the resistance between the following ABS HU/CM terminals and the ABS wheel-speed sensor connector.
―  C1145 (RF): terminal P—A
―  C1145 (RF): terminal S—B
―  C1155 (LF): terminal U—A
―  C1155 (LF): terminal X—B
―  C1165 (RR): terminal J—A
―  C1165 (RR): terminal G—B
―  C1175 (LR): terminal I—A
―  C1175 (LR): terminal L—B
•  Is the resistance less than 5 ohms?
Yes
•  Connect the ABS wheel-speed sensor connector and go to the next step.
No
•  Repair or replace the suspect ABS wheel-speed sensor circuit and clear the DTC from the memory.
4
INSPECT ABS CM OUTPUT
•  Connect the ABS HU/CM connector.
•  Measure the voltage between the following ABS wheel-speed sensor terminals.
―  C1145: ABS wheel-speed sensor (RF) connector terminal A—B
―  C1155: ABS wheel-speed sensor (LF) connector terminal A—B
―  C1165: ABS wheel-speed sensor (RR) connector terminal A—B
―  C1175: ABS wheel-speed sensor (LR) connector terminal A—B
•  Is the voltage more than 9 V?
Yes
•  Replace the ABS wheel-speed sensor and clear the DTC from the memory.
No
•  Replace the ABS CM and clear the DTC from the memory.