Pinpoint Test D: DTCs C1145 (RF), C1155 (LF), C1175 (REAR): Testing

WARNING: This page is about a different car, the 2006 Ford Pickup, 2006 Ford F550 Super Duty, 2006 Ford F450 Super Duty, and 2006 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: Use the flex probe kit for all test connections to prevent damage to the wiring terminals. Do not use standard multimeter probes.

D1 CHECK FOR FAULT REPEATABILITY
NOTE: Both circuits must be checked for each DTC.
- Connect the scan tool.
- Enter the following diagnostic mode on the scan tool: Clear the Continuous DTCs.
- Drive the vehicle at least 16 km/h (10 mph).
- Retrieve and document continuous DTCs.
- Is DTC C1145, C1155 or C1175 retrieved?
Yes : If the active wheel speed sensor tool is available, Go to D2. If the active wheel speed sensor tool is not available, Go to D4.

No : If any other DTCs are retrieved, Go to the ANTI-LOCK BRAKE SYSTEM (ABS) MODULE DIAGNOSTIC TROUBLE CODE (DTC) INDEX .
D2 CHECK THE ABS MODULE OUTPUT USING THE SPECIAL TOOL
- Key in OFF position.
- Disconnect: Suspect Wheel Speed Sensor.
- Connect the special tool to the wheel speed sensor connectors.
- Key in ON position.
- Select the correct system polarity on the special tool and turn the special tool power switch to the ON position.
- Is the module output LED illuminated?
Yes : Go to D3.

No : Go to D6.
D3 CHECK THE WHEEL SPEED SENSOR OUTPUT WITH THE SPECIAL TOOL
- Raise the suspect wheel until it can spin freely. Refer to JACKING & LIFTING .
- While monitoring the special tool, slowly spin the suspect wheel.
- Do the sensor output LEDs illuminate and flash and is the current overload LED not illuminated?
Yes : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.

No : If the current level LED is not illuminated and the sensor output LEDs do not illuminate or if the current level LED is illuminated red, INSTALL a new wheel speed sensor. For the front wheel speed sensor, REFER to WHEEL SPEED SENSOR - FRONT, REAR WHEEL DRIVE (RWD) or WHEEL SPEED SENSOR - FRONT, FOUR WHEEL DRIVE (4WD) . For the rear wheel speed sensor, REFER to WHEEL SPEED SENSOR - REAR . CLEAR the DTCs. REPEAT the self-test.

If the current level LED is not illuminated and the sensor output LEDs illuminate green but do not flash, INSPECT the wheel speed sensor tone ring and INSTALL new if necessary. If the tone ring is OK, INSTALL a new wheel speed sensor. For the front wheel speed sensor, REFER to WHEEL SPEED SENSOR - FRONT, REAR WHEEL DRIVE (RWD) or WHEEL SPEED SENSOR - FRONT, FOUR WHEEL DRIVE (4WD) . For the rear wheel speed sensor, REFER to WHEEL SPEED SENSOR - REAR . CLEAR the DTCs. REPEAT the self-test.

D4 CHECK FOR A SHORT TO VOLTAGE

NOTE: Both circuits must be checked for each DTC.

Key in OFF position.
Disconnect: ABS Module C135.
Disconnect: Suspect Wheel Speed Sensor.
Key in ON position.

Measure the voltage between ABS module connector, harness side and ground, as follows:

DTC CIRCUIT REFERENCE

DTC	ABS Module Connector-Pin	Circuit
C1145 (RF)	C135-26	514 (YE/RD)
C1145 (RF)	C135-27	516 (YE/BK)
C1155 (LF)	C135-12	521 (TN/OG)
C1155 (LF)	C135-13	522 (TN/BK)
C1175 (rear)	C135-42	523 (RD/PK)
C1175 (rear)	C135-41	519 (LG/BK)

Is voltage present?

Yes : REPAIR the circuit(s) in question. CLEAR the DTCs. REPEAT the self-test.

No : Go to D5.

D5 CHECK FOR A SHORT TO GROUND

NOTE: Both circuits must be checked for each DTC.

Key in OFF position.

Measure the resistance between ABS module connector, harness side and ground, as follows:

DTC CIRCUIT REFERENCE

DTC	ABS Module Connector-Pin	Circuit
C1145 (RF)	C135-26	514 (YE/RD)
C1145 (RF)	C135-27	516 (YE/BK)
C1155 (LF)	C135-12	521 (TN/OG)
C1155 (LF)	C135-13	522 (TN/BK)
C1175 (rear)	C135-42	523 (RD/PK)
C1175 (rear)	C135-41	519 (LG/BK)

Are the resistances greater than 10,000 ohms?

Yes : Go to D6.

No : REPAIR the circuit(s) in question. CLEAR the DTCs. TEST the system for normal operation.

D6 CHECK FOR AN OPEN

NOTE: Both circuits must be checked for each DTC.

Key in OFF position.
Disconnect: ABS Module C135.
Disconnect: Suspect Wheel Speed Connector.

Measure the resistance between ABS module C135, harness side and suspected wheel speed sensor connector, harness side, as follows:

DTC WHEEL SPEED SENSOR CONNECTOR-PIN REFERENCE

DTC	Circuit	ABS Module Connector-Pin	Wheel Speed Sensor Connector-Pin
C1145 (RF)	514 (YE/RD)	C135-26	C160-1
C1145 (RF)	516 (YE/BK)	C135-27	C160-2
C1155 (LF)	521 (TN/OG)	C135-12	C150-1
C1155 (LF)	522 (TN/BK)	C135-13	C150-2
C1175 (rear)	523 (RD/PK)	C135-42	C455-2
C1175 (rear)	519 (LG/BK)	C135-41	C455-1

Are the resistances less than 5 ohms?

Yes : Go to D7.

No : REPAIR the circuit(s) in question. CLEAR the DTCs. REPEAT the self-test.

D7 CHECK FOR SHORTED WHEEL SPEED SENSOR CIRCUITS
- Measure the resistance between suspect front wheel speed sensor pins, harness side with the meter in the 10 megohm range.
  
  Fig 1: Checking Shorted Wheel Speed Sensor Circuits (1 Of 2)
  Courtesy of FORD MOTOR CO.
- Measure the resistance between rear wheel speed sensor pins, harness side with the meter in the 10 megohm range.
  
  Fig 2: Checking Shorted Wheel Speed Sensor Circuits (2 Of 2)
  Courtesy of FORD MOTOR CO.
- Is there any continuity?
Yes : REPAIR the circuit(s) in question. CLEAR the DTCs. REPEAT the self-test.

No : Go to D8.
D8 CHECK THE ABS MODULE OUTPUT
- Connect: ABS Module C135.
- Key in ON position.
- Measure the voltage between the suspect front wheel speed sensor pins, harness side.
  
  Fig 3: Checking ABS Module Output
  Courtesy of FORD MOTOR CO.
- Measure the voltage between the rear wheel speed sensor pins, harness side.
  
  Fig 4: Checking ABS Module Output (2 Of 2)
  Courtesy of FORD MOTOR CO.
- Are the voltages greater than 10 volts?
Yes : INSTALL a new wheel speed sensor. For the front wheel speed sensor, REFER to WHEEL SPEED SENSOR - FRONT, REAR WHEEL DRIVE (RWD) or WHEEL SPEED SENSOR - FRONT, FOUR WHEEL DRIVE (4WD) . CLEAR the DTCs. REPEAT the self-test. For the rear wheel speed sensor, REFER to WHEEL SPEED SENSOR - REAR . CLEAR the DTCs. TEST the system for normal operation.

No : Go to D9.
D9 CHECK FOR CORRECT ABS MODULE OPERATION
- Disconnect the ABS connector.
- Check for:
  - corrosion.
  - pushed-out pins.
- Connect the ABS connector and make sure that it is seated correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes : INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE . CLEAR the DTCs. REPEAT the self-test.

No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.