PINPOINT TEST D: DTCs C1145, C1155, C1165 AND C1175 - WHEEL SPEED SENSOR INPUT CIRCUIT FAILURE

WARNING: This page is about a different car, the 2006 Mercury Montego, 2006 Ford Freestyle, and 2006 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: Touching the connector terminals with hands may cause damage to the sensor.

D1 CHECK FOR FAULT REPEATABILITY
- Connect the scan tool.
- Key in ON position.
- 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, C1165 or C1175 retrieved?
Yes: For DTCs C1145 and C1155, 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.

For DTCs C1165 and C1175, GO to D4.

No: INSPECT the wheel speed sensors, wheel speed sensor wiring and wheel speed sensor tone rings. REPAIR or INSTALL new as necessary. 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 . 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 . CLEAR the DTCs. REPEAT the self-test.

D4 CHECK THE WHEEL SPEED SENSOR CIRCUITS 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 C135, harness side and ground as follows:

ABS MODULE CONNECTOR-PIN AND CIRCUIT DESCRIPTION

DTC	ABS Module Connector-Pin	Circuit
C1145	C135-18	514 (YE/RD)
C1145	C135-6	516 (YE/BK)
C1155	1135-34	522 (TN/BK)
C1155	C135-21	521 (TN/OG)
C1165	C135-31	524 (PK/BK)
C1165	C135-19	523 (RD/PK)
C1175	C135-33	518 (LG/RD)
C1175	C135-20	519 (LG/BK)

Is voltage present?

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

No: GO to D5.

D5 CHECK THE WHEEL SPEED SENSOR CIRCUITS FOR A SHORT TO GROUND

NOTE: Both circuits must be checked for each DTC.

Key in OFF position.

Measure the resistance between ABS module C135, harness side and ground as follows:

ABS MODULE CONNECTOR-PIN AND CIRCUIT DESCRIPTION

DTC	ABS Module Connector-Pin	Circuit
C1145	C135-18	514 (YE/RD)
C1145	C135-6	516 (YE/BK)
C1155	C135-34	522 (TN/BK)
C1155	C135-21	521 (TN/OG)
C1165	C135-31	524 (PK/BK)
C1165	C135-19	523 (RD/PK)
C1175	C135-33	518 (LG/RD)
C1175	C135-20	519 (LG/BK)

Are the resistances greater than 10,000 ohms?

Yes: GO to D6.

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

D6 CHECK THE WHEEL SPEED SENSOR CIRCUITS FOR AN OPEN

NOTE: Both circuits must be checked for each DTC.

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

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

WHEEL SPEED SENSOR CONNECTOR-PIN AND CIRCUIT DESCRIPTION

DTC	Circuit	ABS Module Connector-Pin	Wheel Speed Sensor Connector-Pin
C1145	516 (YE/BK)	C135-6	RH front wheel speed sensor C160-1
C1145	514 (YE/RD)	C135-18	RH front wheel speed sensor C160-2
C1155	522 (TN/BK)	C135-34	LH front wheel speed sensor C150-1
C1155	521 (TN/OG)	C135-21	LH front wheel speed sensor C150-2
C1165	523 (RD/PK)	C135-19	RH rear wheel speed sensor C3116-1
C1165	524 (PK/BK)	C135-31	RH rear wheel speed sensor C3116-2
C1175	518 (LG/RD)	C135-33	LH rear wheel speed sensor C3117-2
C1175	519 (LG/BK)	C130-20	LH rear wheel speed sensor C3117-1

Are the resistances less than 5 ohms?

Yes: GO to D7.

No: REPAIR the circuit in question. CLEAR the DTCs. REPEAT the ABS self-test.

D7 CHECK FOR SHORTED WHEEL SPEED SENSOR CIRCUITS
- Measure the resistance between the suspect wheel speed sensor pins, harness side with the meter in the 10 megaohm range.
  
  Fig 1: Measuring Resistance Between Suspect Wheel Speed Sensor Pins & Harness Side
  Courtesy of FORD MOTOR CO.
- Is there any continuity?
Yes: REPAIR the circuit 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 wheel speed sensor pins, harness side.
  
  Fig 2: Measuring Voltage Between Suspect Wheel Speed Sensor Pins & Harness Side
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
Yes: GO to D10.

No: GO to D9.
D9 CHECK FOR CORRECT ABS MODULE OPERATION
- Disconnect: ABS Module C135.
- Check for:
  - corrosion.
  - pushed-out pins.
- Connect the ABS module connector and make sure it seats 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.
D10 CHECK FOR CORRECT WHEEL SPEED SENSOR OPERATION
- Disconnect: Wheel Speed Sensor Connector.
- Check for:
  - corrosion
  - pushed-out pins
- Connect the wheel speed sensor connector and make sure it seats correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes: INSTALL a new wheel speed sensor. REFER to WHEEL SPEED SENSOR - FRONT , WHEEL SPEED SENSOR - REAR, FRONT WHEEL DRIVE (FWD) or WHEEL SPEED SENSOR - REAR, ALL WHEEL DRIVE (AWD) . 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.