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Home >> Ford Truck >> 2011 >> F 350 2WD Super Duty V8-6.2L Flex Fuel >> Repair and Diagnosis >> Brakes and Traction Control >> Antilock Brakes / Traction Control Systems >> Testing and Inspection >> Pinpoint Tests >> Anti-Lock Control - Four-Channel >> Pinpoint Test S: DTCs C0031:13, C0031:17, C0031:23 (LF), C0034:13, C0034:17, C0034:23 (RF), C0037:13, C0037:17, C0037:23 (LR),

Pinpoint Test S: DTCs C0031:13, C0031:17, C0031:23 (LF), C0034:13, C0034:17, C0034:23 (RF), C0037:13, C0037:17, C0037:23 (LR),




Anti-Lock Control - Four-Channel

Pinpoint Tests

Pinpoint Test S: DTCs C0031:13, C0031:17, C0031:23 (LF), C0034:13, C0034:17, C0034:23 (RF), C0037:13, C0037:17, C0037:23 (LR), C003A:13, C003A:17, C003A:23 (RR)

Refer to Wiring Diagram Set 42, Vehicle Dynamic Systems for schematic and connector information. Diagrams By Number

Normal Operation

The active wheel speed sensors generate a square wave signal that is sent to the ABS module. The wheel speed sensor circuitry connects to the ABS module through 2 wires and a connector at each wheel speed sensor. When the ignition is turned to the RUN position, the ABS module carries out a self-test by sending a reference voltage to all of the wheel speed sensors and their circuitry to determine if they are functional.





This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Wheel speed sensor
- ABS module

PINPOINT TEST S: DTCs C0031:13, C0031:17, C0031:23 (LF), C0034:13, C0034:17, C0034:23 (RF), C0037:13, C0037:17, C0037:23 (LR), C003A:13, C003A:17, C003A:23 (RR)

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

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S1 CHECK FOR FAULT REPEATABILITY

- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Clear Continuous DTCs.
- Drive the vehicle at least 20 km/h (12 mph).
- Enter the following diagnostic mode on the scan tool: ABS Module Self-Test.
- Is the DTC still present?

Yes
If the Rotunda Active Wheel Speed Sensor Tester is available, GO to S2. If the Rotunda Active Wheel Speed Sensor Tester is not available, GO to S4.

No
INSPECT the wheel speed sensors and wheel speed sensor wiring. REPAIR or INSTALL new as necessary. REFER to Wheel Speed Sensor - Front, Four Wheel Drive (4WD) Wheel Speed Sensor - Front or Wheel Speed Sensor - Rear, Four-Channel Wheel Speed Sensor - Rear, Four-Channel.

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S2 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 module output LED illuminated?

Yes
GO to S3.

No
GO to S5.

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S3 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 and Lifting Service and Repair.
- 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 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. REFER to Wheel Speed Sensor - Front, Four Wheel Drive (4WD) Wheel Speed Sensor - Front, Wheel Speed Sensor - Front, Rear Wheel Drive (RWD) Wheel Speed Sensor - Front or Wheel Speed Sensor - Rear, Four-Channel Wheel Speed Sensor - Rear, Four-Channel. 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, INSTALL a new wheel speed sensor. REFER to Wheel Speed Sensor - Front, Four Wheel Drive (4WD) Wheel Speed Sensor - Front, Wheel Speed Sensor - Front, Rear Wheel Drive (RWD) Wheel Speed Sensor - Front or Wheel Speed Sensor - Rear, Four-Channel Wheel Speed Sensor - Rear, Four-Channel. CLEAR the DTCs. REPEAT the self-test.

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S4 CHECK THE WHEEL SPEED SENSOR CIRCUITS FOR A SHORT TO BATTERY VOLTAGE

- 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:








- Is any voltage present?

Yes
REPAIR the affected circuit(s) for a short to voltage. CLEAR the DTCs. REPEAT the self-test.

No
GO to S5.

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S5 CHECK THE WHEEL SPEED SENSOR CIRCUITS FOR A SHORT TO GROUND

- Ignition OFF.
- Disconnect: ABS Module C135.
- Measure the resistance between the suspect wheel speed sensor connector, harness side and ground as follows:








- Are the resistances greater than 10,000 ohms?

Yes
GO to S6.

No
REPAIR the affected circuit(s) for a short to ground. CLEAR the DTCs. REPEAT the self-test.

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S6 CHECK THE WHEEL SPEED CIRCUITS FOR AN OPEN

- Disconnect: Suspect Wheel Speed Sensor.
- Measure the resistance between ABS module connector C135, harness side and the suspect wheel speed sensor connector, harness side as follows:








- Are the resistances less than 5 ohms?

Yes
GO to S7.

No
REPAIR the affected circuit(s) for an open circuit. CLEAR the DTCs. REPEAT the self-test.

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S7 CHECK FOR SHORTED WHEEL SPEED SENSOR CIRCUITS

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








- Is the resistance greater 10,000 ohms?

Yes
GO to S8.

No
REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.

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S8 CHECK FOR CORRECT ABS MODULE OUTPUT

- Connect: ABS Module C135.
- Ignition ON.
- Measure the voltage between the suspect wheel speed sensor connector, harness side.








- Is the voltage greater than 10 volts?

Yes
INSTALL a new wheel speed sensor. REFER to Wheel Speed Sensor - Front, Four Wheel Drive (4WD) Wheel Speed Sensor - Front, Wheel Speed Sensor - Front, Rear Wheel Drive (RWD) Wheel Speed Sensor - Front or Wheel Speed Sensor - Rear, Four-Channel Wheel Speed Sensor - Rear, Four-Channel. CLEAR the DTCs. REPEAT the self-test.

No
GO to S9.

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S9 CHECK THE WHEEL SPEED SENSOR OUTPUT

- Ignition OFF.
- Disconnect: Wheel Speed Sensor C150.
- For LF wheel DTCs, connect a fused jumper wire between LF wheel speed sensor C150-1, circuit VCA03 (VT/WH), harness side and LF wheel speed sensor C150, pin 1, circuit VCA03 (VT/WH), component side.




- Connect the automotive meter between LF wheel speed sensor C150-2, circuit RCA17 (YE), harness side and LF wheel speed sensor C150, pin 2, circuit RCA17 (YE), component side.
- For RF wheel DTCs, connect a fused jumper wire between RF wheel speed sensor C160-1, circuit VCA05 (GY/VT), harness side and RF wheel speed sensor C160, pin 1, circuit VCA05 (GY/VT), component side.




- Connect the automotive meter between RF wheel speed sensor C160-2, circuit RCA19 (VT), harness side and RF wheel speed sensor C160, pin 2, circuit RCA19 (VT), component side.
- For LR wheel DTCs, connect a fused jumper wire between LR wheel speed sensor C440-1, circuit VCA07 (BU/OG), harness side and LR wheel speed sensor C440, pin 1, circuit VCA07 (BU/OG), component side.




- Connect the automotive meter between LR wheel speed sensor C440-2, circuit RCA21 (BN/GN), harness side and LR wheel speed sensor C440, pin 2, circuit RCA21 (BN/GN), component side.
- For RR wheel DTCs, connect a fused jumper wire between LF wheel speed sensor C426-1, circuit VCA06 (WT/OG) or (BU/OG) harness side and RR wheel speed sensor C426, pin 1, circuit VCA06 (WT/OG) or (BU/OG) component side.




- Connect the automotive meter between RR wheel speed sensor C426-2, circuit RCA20 (BN) or RCA20 (BN/GN), harness side and LF wheel speed sensor C426, pin 2, circuit RCA20 (BN) or (BN/GN), component side.
- Ignition ON.
- Measure the current while slightly rotating the wheel using incremental turns.
- Does the automotive meter switch between the low state (5-8 mA) and the high state (12-16 mA)?

Yes
GO to S10.

No
INSTALL a new wheel speed sensor. REFER to Wheel Speed Sensor - Front, Four Wheel Drive (4WD) Wheel Speed Sensor - Front or Wheel Speed Sensor - Rear, Four-Channel Wheel Speed Sensor - Rear, Four-Channel. CLEAR the DTCs. REPEAT the self-test.

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S10 CHECK FOR CORRECT ABS MODULE OPERATION

- Disconnect: ABS Module.
- Check for:
- corrosion
- pushed-out pins
- spread terminals
- Connect: ABS Module.
- Make sure the connector is seated 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 Service and Repair. TEST the system for normal operation.

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.

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