PINPOINT TEST D: DTCs C0031:01; C0034:01; C0037:01, C003A:01, C0031:19, C0034:19, C0037:19 AND C003A:19

WARNING: This page is about a different car, the 2014 Lincoln MKX and 2014 Ford Edge. 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.

D1 CHECK FOR FAULT REPEATABILITY
- Ignition ON.
- Using a scan tool, clear all CMDTCs .
- Drive the vehicle at least 20 km/h (12 mph).
- Bring the vehicle to a safe stop.
- Enter the following diagnostic mode on the scan tool: Self-Test - ABS Module.
Is the DTC still present?
- 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 : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. TEST DRIVE the vehicle at least 20 km/h (12 mph). REPEAT the self-test.
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.
- Ignition ON.
- Select the correct system polarity on the Rotunda Active Wheel Speed Sensor Tester and turn the power switch to the ON position.
Is the tester 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. TEST DRIVE the vehicle at least 20 km/h (12 mph). REPEAT the self-test.
- No : INSTALL a new wheel speed sensor. REFER to WHEEL SPEED SENSOR - FRONT or WHEEL SPEED SENSOR - REAR . CLEAR the DTCs. TEST DRIVE the vehicle at least 20 km/h (12 mph). REPEAT the self-test.
D4 CHECK FOR CORRECT ABS MODULE OUTPUT
- Ignition OFF.
- Disconnect: Suspect Wheel Speed Sensor.
- Ignition ON.
- For DTCs C0031:01 and 19, measure the voltage between:
  - LF wheel speed sensor C150-2 , circuit VCA03 (VT/WH), harness side and LF wheel speed sensor C150-1 , circuit RCA17 (YE), harness side.
    
    Fig 1: Measuring Voltage Between LF Wheel Speed Sensor C150-2, Circuit VCA03 (VT/WH) And C150-1, Circuit RCA17 (YE)
    Courtesy of FORD MOTOR CO.
For DTCs C0034:01 and 19, measure the voltage between:
- RF wheel speed sensor C160-1 , circuit VCA05 (GY/VT), harness side and RF wheel speed sensor C160-2 , circuit RCA19 (VT), harness side.
  
  Fig 2: Measuring Voltage Between RF Wheel Speed Sensor C160-1, Circuit VCA05 (GY/VT) And C160-2, Circuit RCA19 (VT)
  Courtesy of FORD MOTOR CO.
For DTCs C0037:01 and 19, measure the voltage between:
- LR wheel speed sensor C440-1 , circuit VCA04 (BU/OG), harness side and LR wheel speed sensor C440-2 , circuit RCA18 (BN/GN), harness side.
  
  Fig 3: Measuring Voltage Between LR Wheel Speed Sensor C440-1, Circuit VCA04 (BU/OG) And C440-2, Circuit RCA18 (BN/GN)
  Courtesy of FORD MOTOR CO.
For DTCs C003A:01 and 19, measure the voltage between:
- RR wheel speed sensor C426-1 , circuit VCA06 (WH/OG), harness side and RR wheel speed sensor C426-2 , circuit RCA20 (BN), harness side.
  
  Fig 4: Measuring Voltage Between LR Wheel Speed Sensor C426-1, Circuit VCA06 (WH/OG) And C440-2, Circuit RCA20 (BN)
  Courtesy of FORD MOTOR CO.
Is the voltage greater than 10 volts?
- Yes : GO to D5 .
- No : GO to D6.
D5 CHECK THE WHEEL SPEED SENSOR CIRCUITS FOR A SHORT TO BATTERY VOLTAGE
- Ignition OFF.
- Disconnect: ABS Module C135 .
- Ignition ON.
- For LF sensor, measure the voltage between:
  - ABS module C135-45 , circuit VCA03 (VT/WH), harness side and ground.
  - ABS module C135-46 , circuit RCA17 (YE), harness side and ground.
    
    Fig 5: Measuring Voltage Between ABS Module C135-45, Circuit VCA03 (VT/WH) And Ground
    Courtesy of FORD MOTOR CO.
- For RF sensor, measure the voltage between:
  - ABS module C135-33 , circuit RCA19 (VT), harness side and ground.
  - ABS module C135-34 , circuit VCA05 (GY/VT), harness side and ground.
    
    Fig 6: Measuring Voltage Between ABS Module C135-34, Circuit VCA05 (GY/VT) And Ground
    Courtesy of FORD MOTOR CO.
- For LR sensor, measure the voltage between:
  - ABS module C135-36 , circuit VCA04 (BU/OG), harness side and ground.
  - ABS module C135-37 , circuit RCA18 (BN/GN), harness side and ground.
    
    Fig 7: Measuring Voltage Between ABS Module C135-36, Circuit VCA04 (BU/OG) And Ground
    Courtesy of FORD MOTOR CO.
- For RR sensor, measure the voltage between:
  - ABS module C135-42 , circuit RCA20 (BN), harness side and ground.
  - ABS module C135-43 , circuit VCA06 (WH/OG), harness side and ground.
    
    Fig 8: Measuring Voltage Between C135-42, Circuit RCA20 (BN) And Ground
    Courtesy of FORD MOTOR CO.
Is any voltage present?
- Yes : REPAIR the affected circuit(s) for a short to voltage. CLEAR the DTCs. TEST DRIVE the vehicle at least 20 km/h (12 mph). REPEAT the self-test.
- No : INSTALL a new wheel speed sensor. REFER to WHEEL SPEED SENSOR - FRONT or WHEEL SPEED SENSOR - REAR . CLEAR the DTCs. TEST DRIVE the vehicle at least 20 km/h (12 mph). REPEAT the self-test.
D6 CHECK THE WHEEL SPEED SENSOR CIRCUITS FOR A SHORT TO GROUND
- Ignition OFF.
- Disconnect: ABS Module C135 .
- For LF sensor, measure the resistance between:
  - ABS module C135-45 , circuit VCA03 (VT/WH), harness side and ground.
  - ABS module C135-46 , circuit RCA17 (YE), harness side and ground.
    
    Fig 9: Measuring Voltage Between Circuit VCA03 (VT/WH) And Ground
    Courtesy of FORD MOTOR CO.
- For RF sensor, measure the resistance between:
  - ABS module C135-34 , circuit VCA05 (GY/VT), harness side and ground.
  - ABS module C135-33 , circuit RCA19 (VT), harness side and ground.
    
    Fig 10: Measuring Resistance Between C135-33, Circuit RCA19 (VT) And Ground
    Courtesy of FORD MOTOR CO.
- For LR sensor, measure the resistance between:
  - ABS module C135-36 , circuit VCA04 (BU/OG), harness side and ground.
  - ABS module C135-37 , circuit RCA19 (BN/GN), harness side and ground.
    
    Fig 11: Measuring Resistance Between C135-36, Circuit VCA04 (BU/OG) And Ground
    Courtesy of FORD MOTOR CO.
- For RR sensor, measure the resistance between:
  - ABS module C135-43 , circuit VCA06 (WH/OG), harness side and ground.
  - ABS module C135-42 , circuit RCA20 (BN), harness side and ground.
    
    Fig 12: Measuring Resistance Between ABS Module C135-43, Circuit VCA06 (WH/OG) And Ground
    Courtesy of FORD MOTOR CO.
Are the resistances greater than 10, 000 ohms?
- Yes : GO to D7 .
- No : REPAIR the affected circuit(s) for a short to ground. CLEAR the DTCs. TEST DRIVE the vehicle at least 20 km/h (12 mph). REPEAT the self-test.

D7 CHECK THE WHEEL SPEED CIRCUITS FOR AN OPEN

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

For front wheel speed sensors, measure the resistance between ABS module C135 , harness side and the suspect wheel speed sensor connector, harness side as follows:

Sensor Location	Wheel Speed Sensor	Circuit	ABS Module
LF	C150-2	VCA03 (VT/WH)	C135-45
	C150-1	RCA17 (YE)	C135-46
RF	C160-1	VCA05 (GY/VT)	C135-34
	C160-2	RCA19 (VT)	C135-33

Fig 13: Measuring Resistance Between ABS Module C135, Harness Side And Suspect Wheel Speed Sensor Connector

Courtesy of FORD MOTOR CO.

For rear wheel speed sensors, measure the resistance between ABS module C135 , harness side and the suspect wheel speed sensor connector, harness side as follows:

Sensor Location	Wheel Speed Sensor	Circuit	ABS Module
LR	C440-1	VCA04 (BU/OG)	C135-36
	C440-2	RCA18 (BN/GN)	C135-37
RR	C426-1	VCA06 (WH/OG)	C135-43
	C426-2	RCA20 (BN)	C135-42

Fig 14: Measuring Resistance Between ABS Module C135 And Suspect Wheel Speed Sensor Connector

Courtesy of FORD MOTOR CO.

Are the resistances less than 5 ohms?

Yes : GO to D8 .
No : REPAIR the affected circuit(s). CLEAR the DTCs. TEST DRIVE the vehicle at least 20 km/h (12 mph). REPEAT the self-test.

D8 CHECK FOR SHORTED WHEEL SPEED SENSOR CIRCUITS
- For LF sensor, measure the resistance between:
  - LF wheel speed sensor C150-2 , circuit VCA03 (VT/WH), harness side and LF wheel speed sensor C150-1 , circuit RCA17 (YE), harness side.
    
    Fig 15: Measuring Resistance Between LF Wheel Speed Sensor C150-2, Circuit VCA03 (VT/WH) And LF Wheel Speed Sensor
    Courtesy of FORD MOTOR CO.
- For RF sensor, measure the resistance between:
  - RF wheel speed sensor C160-1 , circuit VCA05 (GY/VT), harness side and RF wheel speed sensor C160-2 , circuit RCA19 (VT), harness side.
    
    Fig 16: Measuring Resistance Between RF Wheel Speed Sensor C160-1, Circuit VCA05 (GY/VT) And RF Wheel Speed Sensor
    Courtesy of FORD MOTOR CO.
- For LR sensor, measure the resistance between:
  - LR wheel speed sensor C440-1 , circuit VCA04 (BU/OG), harness side and LR wheel speed sensor C440-2 , circuit RCA18 (BN/GN), harness side.
    
    Fig 17: Measuring Resistance Between LR Wheel Speed Sensor C440-1, Circuit VCA04 (BU/OG), And LR Wheel Speed Sensor
    Courtesy of FORD MOTOR CO.
- For RR sensor, measure the resistance between:
  - RR wheel speed sensor C426-1 , circuit VCA06 (WH/OG), harness side and RR wheel speed sensor C426-2 , circuit RCA20 (BN), harness side.
    
    Fig 18: Measuring Resistance Between RR Wheel Speed Sensor C426-1, Circuit VCA06 (WH/OG) And RR Wheel Speed Sensor
    Courtesy of FORD MOTOR CO.
Is the resistance greater 10, 000 ohms?
- Yes : GO to D9 .
- No : REPAIR the affected circuit(s). CLEAR the DTCs. TEST DRIVE the vehicle at least 20 km/h (12 mph). REPEAT the self-test.
D9 CHECK FOR FAULT REPEATABILITY
- Connect: ABS Module C135 .
- Connect: Suspect Wheel Speed Sensor.
- Ignition ON.
- Using a scan tool, clear all CMDTCs .
- Drive the vehicle at least 20 km/h (12 mph).
- Bring the vehicle to a safe stop.
- Enter the following diagnostic mode on the scan tool: Self-Test - ABS Module.
Is the original ABS module DTC(s) still present?
- Yes : GO to D10 .
- No : If a new ABS module DTC is present, DIAGNOSE the new DTC. REFER to the ABS MODULE DTC CHART .
  If no ABS module DTCs are present, the system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
D10 CHECK THE HARNESS AND CONNECTORS
- Disconnect: ABS Module C135 .
- Disconnect: Suspect Wheel Speed Sensor.
- Inspect the connectors (including any in-line connectors) for:
  - corrosion
  - loose or spread terminals
  - loose or frayed wire connections at terminals
Were any concerns found?
- Yes : REPAIR as necessary
  Refer to OEM CONNECTOR REPAIR PROCEDURES for schematic and connector information.
- No : GO to D11 .
D11 CHECK FOR CORRECT ABS MODULE OPERATION
- Check ABS module C135 for:
  - corrosion
  - pushed-out pins
  - spread terminals
- Connect: ABS Module C135 .
- Connect: Suspect Wheel Speed Sensor.
- Make sure the connector is seated correctly, then operate the system and verify the concern is still present.
Is the concern still present?
- Yes : For vehicles without adaptive cruise control, INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE . TEST the system for normal operation.
  For vehicles with adaptive cruise control, INSTALL a new HCU . REFER to HYDRAULIC CONTROL UNIT (HCU) .
- 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.