Pinpoint Test G: DTC C0031:11, 15; C0034:11, 15; C0037:11, 15; Or C003A:11, 15
Anti-Lock Control - Traction Control and Stability Assist
Pinpoint Tests
Pinpoint Test G: DTC C0031:11, 15; C0034:11, 15; C0037:11, 15; or C003A:11, 15
Normal Operation
Active wheel speed sensors generate a square wave signal that is sent to the ABS module. The wheel speed sensor circuits are connected to the ABS module through 2 wires and a connector at each wheel speed sensor. When the ignition switch is turned to the RUN position, the ABS module carries out a self-test by sending a reference voltage through the wheel speed sensor circuits and sensors.
Both voltage and ground are supplied to the active wheel speed sensors through the ABS module.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Wheel speed sensor
- Wheel speed sensor ring
- ABS module
PINPOINT TEST G: DTC C0031:11, 15; C0034:11, 15; C0037:11, 15 OR C003A:11, 15
NOTICE: Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multi-meter probes.
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G1 CHECK FOR FAULT REPEATABILITY
- Connect the scan tool.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Clear the ABS module DTCs .
- Drive the vehicle at least 20 km/h (12 mph).
- Enter the following diagnostic mode on the scan tool: Self Test - ABS Module .
- Retrieve and record the ABS module DTCs.
- Are DTCs C0031:11, 15, C0034:11, 15, C0037:11, 15 and/or C003A:11, 15 retrieved?
Yes
If the Rotunda Active Wheel Speed Sensor Tester is available, GO to G2.
If the Rotunda Active Wheel Speed Sensor Tester is not available, for DTC C0031:15, C0034:15, C0037:15, or C003A:15, GO to G4. For DTC C0031:11, C0034:11, C0037:11, or C003A:11, GO to G5.
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 ABS Module DTC Chart. Anti-Lock Control - Traction Control and Stability Assist
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G2 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 G3.
No
GO to G6.
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G3 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 Wheel Speed Sensor - Front or Wheel Speed Sensor - Rear 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 bearing and magnetic strip and INSTALL new if necessary. If the wheel bearing and magnetic strip is OK, INSTALL a new wheel speed sensor. REFER to Wheel Speed Sensor - Front Wheel Speed Sensor - Front or Wheel Speed Sensor - Rear Wheel Speed Sensor - Rear. CLEAR the DTCs. REPEAT the self-test.
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G4 CHECK THE WHEEL SPEED SENSOR CIRCUITS FOR A SHORT TO VOLTAGE
NOTICE: No measurements should be taken with the wheel speed sensor connected. Damage to the wheel speed sensor will result.
- Ignition OFF.
- Disconnect: ABS Module C155 .
- Disconnect: Suspect Wheel Speed Sensor .
- Ignition ON.
- For DTC C0031:15 (LF), measure the voltage between ground and:
- ABS module C155-45, circuit 8-CF32 (WH), harness side.
- ABS module C155-46, circuit 9-CF32 (BN), harness side.
- For DTC C0034:15 (RF), measure the voltage between ground and:
- ABS module C155-33, circuit 9-CF38 (BN/RD), harness side.
- ABS module C155-34, circuit 8-CF38 (WH/RD), harness side.
- For DTC C0037:15 (LR), measure the voltage between ground and:
- ABS module C155-36, circuit 8-CF34 (WH/BU), harness side.
- ABS module C155-37, circuit 9-CF34 (BN/BU), harness side.
- For DTC C003A:15 (RR), measure the voltage between ground and:
- ABS module C155-42, circuit 9-CF40 (BN/GN), harness side.
- ABS module C155-43, circuit 8-CF40 (WH/GN), harness side.
- Is any voltage present?
Yes
REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.
No
GO to G6.
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G5 CHECK THE WHEEL SPEED SENSOR CIRCUITS FOR A SHORT TO GROUND
NOTE: Both circuits must be checked for each DTC.
- Ignition OFF.
- For DTC C0031:01 (LF), measure the resistance between ground and:
- ABS module C155-45, circuit 8-CF32 (WH), harness side.
- ABS module C155-46, circuit 9-CF32 (BN), harness side.
- For DTC C0034:01 (RF), measure the resistance between ground and:
- ABS module C155-33, circuit 9-CF38 (BN/RD), harness side.
- ABS module C155-34, circuit 8-CF38 (WH/RD), harness side.
- For DTC C0037:01 (LR), measure the resistance between ground and:
- ABS module C155-36, circuit 8-CF34 (WH/BU), harness side.
- ABS module C155-37, circuit 9-CF34 (BN/BU), harness side.
- For DTC C003A:01 (RR), measure the resistance between ground and:
- ABS module C155-42, circuit 9-CF40 (BN/GN), harness side.
- ABS module C155-43, circuit 8-CF40 (WH/GN), harness side.
- Are the resistances greater than 10,000 ohms?
Yes
GO to G6.
No
REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.
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G6 CHECK THE WHEEL SPEED CIRCUITS FOR AN OPEN
- Ignition OFF.
- Disconnect: ABS Module C155 (if not previously disconnected) .
- Disconnect: Suspect Wheel Speed Sensor (if not previously disconnected) .
- Measure the resistance between ABS module connector C155, harness side and the suspect wheel speed sensor connector, harness side as indicated in the following chart:
- Are the resistances less than 5 ohms?
Yes
GO to G7.
No
REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.
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G7 CHECK FOR SHORTED WHEEL SPEED SENSOR CIRCUITS
- For DTC C0031:11, 15 (LF), measure the resistance between:
- LF wheel speed sensor C150-2, circuit 8-CF32 (WH), harness side and LF wheel speed sensor C150-1, circuit 9-CF32 (BN), harness side.
- For DTC C0034:11, 15 (RF), measure the resistance between:
- RF wheel speed sensor C160-2, circuit 8-CF38 (WH/RD), harness side and RF wheel speed sensor C160-1, circuit 9-CF38 (BN/RD), harness side.
- For DTC C0037:11, 15 (LR), measure the resistance between:
- LR wheel speed sensor C440-2, circuit 8-CF34 (WH/BU), harness side and LR wheel speed sensor C440-1, circuit 9-CF34 (BN/BU), harness side.
- For DTC C003A:11, 15 (RR), measure the resistance between:
- RR wheel speed sensor C426-2, circuit 8-CF40 (WH/GN), harness side and RR wheel speed sensor C426-1, circuit 9-CF40 (BN/GN), harness side.
- Is the resistance greater 10,000 ohms?
Yes
GO to G8.
No
REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.
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G8 CHECK FOR CORRECT ABS MODULE OUTPUT
- Connect: ABS Module C155 .
- Ignition ON.
- For DTC C0031:11, 15 (LF), measure the voltage between:
- LF wheel speed sensor C150-2, circuit 8-CF32 (WH), harness side and LF wheel speed sensor C150-1, circuit 9-CF32 (BN), harness side.
- For DTC C0034:11, 15 (RF), measure the voltage between:
- RF wheel speed sensor C160-2, circuit 8-CF38 (WH/RD), harness side and RF wheel speed sensor C160-1, circuit 9-CF38 (BN/RD), harness side.
- For DTC C0037:11, 15 (LR), measure the voltage between:
- LR wheel speed sensor C440-2, circuit 8-CF34 (WH/BU), harness side and LR wheel speed sensor C440-1, circuit 9-CF34 (BN/BU), harness side.
- For DTC C003A:11, 15 (RR), measure the voltage between:
- RR wheel speed sensor C426-2, circuit 8-CF40 (WH/GN), harness side and RR wheel speed sensor C426-1, circuit 9-CF40 (BN/GN), harness side.
- Is the voltage greater than 10 volts?
Yes
INSTALL a new wheel speed sensor. REFER to Wheel Speed Sensor - Front Wheel Speed Sensor - Front or Wheel Speed Sensor - Rear Wheel Speed Sensor - Rear. CLEAR the DTCs. REPEAT the self-test.
No
GO to G9.
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G9 CHECK FOR CORRECT ABS MODULE OPERATION
- Disconnect: ABS Module C155 .
- Check the connector for:
- corrosion.
- pushed-out pins.
- spread terminals.
- Connect: ABS Module C155 .
- 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 Hydraulic Control Unit (HCU). REFER to Hydraulic Control Unit (HCU) 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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