PINPOINT TEST D: DTCs C1145, C1155, C1165 AND C1175

WARNING: This page is about a different car, the 2012 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

NOTE: If the ignition is turned to the ON position when a wheel speed sensor is disconnected, the ABS module disables the output to that sensor. Make sure all test connections are made at the wheel speed sensor connector before turning the ignition to the ON position.

D1 CHECK FOR FAULT REPEATABILITY
- Connect the scan tool.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Clear the Continuous DTCs.
- Drive the vehicle at least 16 km/h (10 mph).
- Retrieve the Continuous Memory Diagnostic Trouble Codes (CMDTCs).
- Is DTC C1145, C1155, C1165 or C1175 retrieved?
  - Yes : If the Rotunda Active Wheel Speed Sensor Tester is available, GO to D2. If the Rotunda Active Wheel Speed Sensor Tester is not available, GO to D4.
  - No : INSPECT the wheel speed sensors and wheel speed sensor wiring. REPAIR or INSTALL new as necessary. If any other DTCs are retrieved, GO to the ABS Module DTC Chart .
D2 CHECK THE ABS MODULE OUTPUT USING THE ROTUNDA ACTIVE WHEEL SPEED SENSOR TESTER
- Ignition OFF.
- Disconnect: Suspect Wheel Speed Sensor.
- Connect the Rotunda Active Wheel Speed Sensor Tester to the wheel speed sensor connectors.
- Select the correct system polarity on the tester and turn the tester power switch to the ON position.
- Ignition ON.
- Is the module output LED illuminated?
  - Yes : GO to D3.
  - No : GO to D6.
D3 CHECK THE WHEEL SPEED SENSOR OUTPUT WITH THE ROTUNDA ACTIVE WHEEL SPEED SENSOR TESTER
- Raise the suspect wheel until it can spin freely. REFER to JACKING & LIFTING .
- While monitoring the Rotunda Active Wheel Speed Sensor Tester, 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 overload level LED is not illuminated and the sensor output LEDs do not illuminate or if the current overload level LED is illuminated red, INSTALL a new wheel speed sensor. REFER to Wheel Speed Sensor - Front or Wheel Speed Sensor - Rear . CLEAR the DTCs. REPEAT the self-test. If the current overload level LED is not illuminated and the sensor output LEDs illuminate green but do not flash, INSTALL a new wheel speed sensor. REFER to Wheel Speed Sensor - Front or Wheel Speed Sensor - Rear . CLEAR the DTCs. REPEAT the self-test. If the outputs LEDs still do not flash when spinning the wheel, INSTALL a new wheel bearing magnetic strip or tone ring (rear). REFER to FRONT SUSPENSION - REAR WHEEL DRIVE (RWD) , FRONT SUSPENSION - FOUR WHEEL DRIVE (4WD) or Wheel Speed Sensor Ring - Rear .

D4 CHECK THE WHEEL SPEED SENSOR CIRCUITS FOR A SHORT TO VOLTAGE

NOTE: Check both circuits for each DTC.

Ignition OFF.
Disconnect: ABS Module C135.
Disconnect: Suspect Wheel Speed Sensor.
Ignition ON.

Measure the voltage between the suspect wheel speed sensor connector, harness side and ground as follows:

Wheel Speed Sensor	Circuit
C150-1 (LF)	VCA03 (VT/WH)
C150-2 (LF)	RCA17 (YE)
C160-1 (RF)	VCA05 (GY/VT)
C160-2 (RF)	RCA19 (VT)
C426-1 (RR)	VCA06 (WH/OG)
C426-2 (RR)	RCA20 (BN)
C440-1 (LR)	VCA04 (BU/OG)
C440-2 (LR)	RCA18 (BN/GN)

Fig 1: Measuring Voltage Between Suspect Wheel Speed Sensor Connector, Harness Side And Ground

Courtesy of FORD MOTOR CO.

Is any voltage present?
- Yes : REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.
- No : GO to D5.

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

NOTE: Check both circuits for each DTC.

Ignition OFF.

Measure the resistance between the wheel speed sensor connector, harness side and ground as follows:

Wheel Speed Sensor	Circuit
C150-1 (LF)	VCA03 (VT/WH)
C150-2 (LF)	RCA17 (YE)
C160-1 (RF)	VCA05 (GY/VT)
C160-2 (RF)	RCA19 (VT)
C426-1 (RR)	VCA06 (WH/OG)
C426-2 (RR)	RCA20 (BN)
C440-1 (LR)	VCA04 (BU/OG)
C440-2 (LR)	RCA18 (BN/GN)

Fig 2: Measuring Resistance Between Wheel Speed Sensor Connector, Harness Side And Ground

Courtesy of FORD MOTOR CO.

Are the resistances greater than 10, 000 ohms?
- Yes : GO to D6.
- No : REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.

D6 CHECK THE WHEEL SPEED SENSOR CIRCUITS FOR AN OPEN

NOTE: Check both circuits for each DTC.

Ignition OFF.
Disconnect: ABS Module C135.
Disconnect: Suspect Wheel Speed Sensor.

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

ABS Module	Circuit	Wheel Speed Sensor
C135-21	VCA03 (VT/WH)	C150-1 (LF)
C135-34	RCA17 (YE)	C150-2 (LF)
C135-18	VCA05 (GY/VT)	C160-1 (RF)
C135-6	RCA19 (VT)	C160-2 (RF)
C135-19	VCA06 (WH/OG)	C426-1 (RR)
C135-31	RCA20 (BN)	C426-2 (RR)
C135-33	VCA04 (BU/OG)	C440-1 (LR)
C135-20	RCA18 (BN/GN)	C440-2 (LR)

Fig 3: Measuring Resistance Between ABS Module Connector, Harness Side And Suspect Wheel Speed Sensor Connector, Harness Side

Courtesy of FORD MOTOR CO.

Are the resistances less than 5 ohms?
- Yes : GO to D7.
- No : REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the ABS self-test.

D7 CHECK SHORTED WHEEL SPEED SENSOR CIRCUITS FOR A SHORT TOGETHER

Measure the resistance between the suspect wheel speed sensor connector, harness side as follows:

ABS Module	Circuit	Wheel Speed Sensor
C135-21	VCA03 (VT/WH)	C150-1 (LF)
C135-34	RCA17 (YE)	C150-2 (LF)
C135-18	VCA05 (GY/VT)	C160-1 (RF)
C135-6	RCA19 (VT)	C160-2 (RF)
C135-19	VCA06 (WH/OG)	C426-1 (RR)
C135-31	RCA20 (BN)	C426-2 (RR)
C135-33	VCA04 (BU/OG)	C440-1 (LR)
C135-20	RCA18 (BN/GN)	C440-2 (LR)

Fig 4: Measuring Resistance Between Suspect Wheel Speed Sensor Connector, Harness Side

Courtesy of FORD MOTOR CO.

Is the resistance greater than 10, 000 ohms?
- Yes : GO to D8.
- No : REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.

D8 CHECK THE ABS MODULE OUTPUT
NOTE: Make sure all test connections are made at the wheel speed sensor before the ignition key is turned to the ON position.

NOTE: Use a meter with a min/max feature and/or recording capabilities to obtain accurate measurements. The ABS module disables the voltage output immediately if the wheel speed sensor is not present.
- Ignition OFF.
- Connect: ABS Module C135.
- Connect the meter to the suspect wheel speed sensor electrical connector pins, harness side.
- Set the meter to measure DC voltage.
- Set the meter range to greater than 15 volts.
- Enable the min/max or recording feature.
- Ignition ON.
- Check the maximum recorded voltage on the meter.
- Is the maximum recorded voltage greater than 10 volts?
  - Yes : INSTALL a new wheel speed sensor. REFER to Wheel Speed Sensor - Front or Wheel Speed Sensor - Rear . CLEAR the DTCs. REPEAT the self-test.
  - No : GO to D9.
D9 CHECK FOR CORRECT ABS MODULE OPERATION
- Disconnect: ABS Module C135.
- Check for:
  - corrosion
  - damaged pins
  - pushed-out pins
- Connect: ABS Module C135.
- Make sure the connector seats correctly, then 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.