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C0045




DTC C0035, C0040, C0045, or C0050

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.

* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C0035 06
- Left Front Wheel Speed Sensor Circuit Low Voltage/Open

DTC C0035 08
- Left Front Wheel Speed Sensor Circuit Performance - Signal Invalid

DTC C0035 0E
- Left Front Wheel Speed Sensor Circuit Low Resistance

DTC C0035 0F
- Left Front Wheel Speed Sensor Circuit Signal Erratic

DTC C0035 18
- Left Front Wheel Speed Sensor Circuit Low Signal Amplitude

DTC C0035 3A
- Left Front Wheel Speed Sensor Circuit Incorrect Component Installed

DTC C0035 5A
- Left Front Wheel Speed Sensor Circuit Not Plausible

DTC C0040 06
- Right Front Wheel Speed Sensor Circuit Low Voltage/Open

DTC C0040 08
- Right Front Wheel Speed Sensor Circuit Performance - Signal Invalid

DTC C0040 0E
- Right Front Wheel Speed Sensor Circuit Low Resistance

DTC C0040 0F
- Right Front Wheel Speed Sensor Circuit Signal Erratic

DTC C0040 18
- Right Front Wheel Speed Sensor Circuit Low Signal Amplitude

DTC C0040 3A
- Right Front Wheel Speed Sensor Circuit Incorrect Component Installed

DTC C0040 5A
- Right Front Wheel Speed Sensor Circuit Not Plausible

DTC C0045 06
- Left Rear Wheel Speed Sensor Circuit Low Voltage/Open

DTC C0045 08
- Left Rear Wheel Speed Sensor Circuit Performance - Signal Invalid

DTC C0045 0E
- Left Rear Wheel Speed Sensor Circuit Low Resistance

DTC C0045 0F
- Left Rear Wheel Speed Sensor Circuit Signal Erratic

DTC C0045 18
- Left Rear Wheel Speed Sensor Circuit Low Signal Amplitude

DTC C0045 3A
- Left Rear Wheel Speed Sensor Circuit Incorrect Component Installed

DTC C0045 5A
- Left Rear Wheel Speed Sensor Circuit Not Plausible

DTC C0050 06
- Right Rear Wheel Speed Sensor Circuit Low Voltage/Open

DTC C0050 08
- Right Rear Wheel Speed Sensor Circuit Performance - Signal Invalid

DTC C0050 0E
- Right Rear Wheel Speed Sensor Circuit Low Resistance

DTC C0050 0F
- Right Rear Wheel Speed Sensor Circuit Signal Erratic

DTC C0050 18
- Right Rear Wheel Speed Sensor Circuit Low Signal Amplitude

DTC C0050 3A
- Right Rear Wheel Speed Sensor Circuit Incorrect Component Installed

DTC C0050 5A
- Right Rear Wheel Speed Sensor Circuit Not Plausible

Diagnostic Fault Information










Circuit/System Description

The wheel speeds are detected by active wheel speed sensors. The tone ring consists of permanent magnets. Each wheel speed sensor receives signal voltage from the electronic brake control module and provides an alternating current square wave signal to the electronic brake control module. As the wheel spins, the electronic brake control module uses the frequency of the high and low signals to calculate the wheel speed.

Conditions for Running the DTC

C0035 06, C0040 06, C0045 06, and C0050 06

Ignition ON.

C0035 08, C0040 08, C0045 08, and C0050 08

* Ignition ON

* Vehicle speed is greater than 35 km/h (22 MPH).

C0035 0E, C0040 0E, C0045 0E, and C0050 0E

Vehicle speed greater than 40 km/h (25 MPH).

C0035 0F, C0040 0F, C0045 0F, and C0050 0F

* Ignition ON

* Vehicle speed is greater than 35 km/h (22 MPH).

C0035 18, C0040 18, C0045 18, and C0050 18

* Ignition ON

* Vehicle speed is greater than 10 km/h (6 MPH).

C0035 3A, C0040 3A, C0045 3A, and C0050 3A

* Ignition ON

* Vehicle speed is greater than 20 km/h (13 MPH).

C0035 5A, C0040 5A, C0045 5A, and C0050 5A

* Ignition ON

* Vehicle speed is greater than 20 km/h (13 MPH).

Conditions for Setting the DTC

C0035 06, C0040 06, C0045 06, or C0050 06

* A short to voltage, or open/high resistance is detected on the wheel speed sensor low reference circuit.

* A short to ground, open/high resistance, or short to voltage is detected on the wheel speed sensor signal circuit.

C0035 08, C0040 08, C0045 08, or C0050 08

* Electromagnetic interference with the wheel speed sensor harness.

* A missing or false wheel speed signal is detected with a change in rotational direction.

C0035 0E, C0040 0E, C0045 0E, or C0050 0E

A detection of wheel speed sensor signal noise.

C0035 0F, C0040 0F, C0045 0F, or C0050 0F

An erratic wheel speed sensor signal is detected.

C0035 18, C0040 18, C0045 18, or C0050 18

A missing wheel speed sensor signal is detected.

C0035 3A, C0040 3A, C0045 3A, or C0050 3A

The wheel speed sensor is not mounted correctly or the wrong sensor is installed.

C0035 5A, C0040 5A, C0045 5A, or C0050 5A

The difference between fastest and slowest wheel speed is greater than fifty percent.

Action Taken When the DTC Sets

* The ABS indicator turns ON.

* The traction off Indicator turns ON.

* The traction/stability control indicator turns ON.

* The Service Stabilitrak message may be displayed on the driver information center.

* The electronic brake control module disables the ABS, and the traction control and stability control for the duration of the ignition cycle.

Conditions for Clearing the DTC

* The DTC clears when the diagnostic runs and passes.

* The history DTC will clear after 40 consecutive fault-free ignition cycles have occurred.

Diagnostic Aids

* Do not use a magnet to clean the tone ring.

* Inspect the sensor and ring for rust or corrosion.

* If two or more wheel speed sensors are inoperative, diagnose each wheel speed sensor individually.

* If any of the symptom codes 0F, 08, 18, 3A, or 5A are set, refer to the Diagnostic Fault Information table for possible mechanical faults or conditions.

* If the customer comments that the ABS indicator is ON only during moist environmental conditions (rain, snow, vehicle wash, etc.), inspect the wheel speed sensor wiring for signs of water intrusion.

Reference Information

Schematic Reference

Antilock Brake System Schematics [1][2]Antilock Brakes / Traction Control Systems

Connector End View Reference

Component Connector End Views Fuel Pump and Level Sensor Assembly

Description and Operation

ABS Description and Operation Description and Operation

Electrical Information Reference

* Circuit Testing Circuit Testing

* Connector Repairs Connector Repairs

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Control Module References for scan tool information

Circuit/System Verification

1. Test drive the vehicle in a straight line at a speed greater than 40 km/h (25 MPH).

2. Verify all scan tool Wheel Speed Sensor parameters are within 4 km/h (2.5 MPH) of each other.

• If any parameter is not within 4 km/h (2.5 MPH) of each other
Refer to Circuit/System Testing.

• If each parameter is within 4 km/h (2.5 MPH) of each other

3. All OK.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the appropriate B5 Wheel Speed Sensor. It may take up to 2 minutes for all vehicle systems to power down.

2. Test for less than 5 ohms between the low reference circuit terminal 2 and ground.

• If 5 ohms or greater

1. Ignition OFF, disconnect the harness connector at the K17 Electronic Brake Control Module.

2. Test for less than 2 ohms in the low reference circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.

• If less than 2 ohms, replace the K17 Electronic Brake Control Module.

• If less than 5 ohms

3. Ignition ON.

4. Test for greater than 11 V between the signal circuit terminal 1 and ground.

• If less than 11 V

1. Ignition OFF, disconnect the harness connector at the K17 Electronic Brake Control Module.

2. Test for infinite resistance between the signal circuit and ground.

• If less than infinite resistance, repair the short to ground on the circuit.

• If infinite resistance.

3. Test for less than 2 ohms in the signal circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.

• If less than 2 ohms, replace the K17 Electronic Brake Control Module.

• If 11 V or greater

5. Install a 3 A fused jumper wire at the signal circuit terminal 1, ignition ON.

6. Verify the scan tool Wheel Speed Sensor parameter changes while rapidly tapping the fused jumper wire to the low reference circuit terminal 2.

• If the parameter does not change

1. Ignition OFF, disconnect the harness connector at the K17 Electronic Brake Control Module, ignition ON.

2. Test for less than 1 V between the signal circuit and ground.

• If 1 V or greater, repair the short to voltage on the circuit.

• If less than 1 V

3. Replace the K17 Electronic Brake Control Module.

• If the parameter changes

7. Test or replace the B5 Wheel Speed Sensor.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

* Front Wheel Speed Sensor Replacement (J64) Front Wheel Speed Sensor Replacement (J64)Front Wheel Speed Sensor Replacement (J55) Front Wheel Speed Sensor Replacement (J55)

* Rear Wheel Speed Sensor Replacement (J64) Rear Wheel Speed Sensor Replacement (J64)Rear Wheel Speed Sensor Replacement (J55) Rear Wheel Speed Sensor Replacement (J55)

* Control Module References Control Module References for Electronic Brake Control Module replacement, programming and setup

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