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DTC C0035, C0040, C0045, or C0050

DTC C0035, C0040, C0045, or C0050

Diagnostic Instructions


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

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

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


DTC Descriptor

DTC C0035 06

Left Front Wheel Speed Sensor Circuit Low Voltage/Open

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 5A

Left Front Wheel Speed Sensor Circuit Not Plausible

DTC C0040 06

Right Front Wheel Speed Sensor Circuit Low Voltage/Open

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 5A

Right Front Wheel Speed Sensor Circuit Not Plausible

DTC C0045 06

Left Rear Wheel Speed Sensor Circuit Low Voltage/Open

DTC C0045 0F

Rear Wheel Speed Sensor Circuit Signal Erratic

DTC C0045 18

Left Rear Wheel Speed Sensor Circuit Low Signal Amplitude

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 0F

Right Rear Wheel Speed Sensor Circuit Signal Erratic

DTC C0050 18

Right Rear Wheel Speed Sensor Circuit Low Signal Amplitude

DTC C0050 5A

Right Rear Wheel Speed Sensor Circuit Not Plausible

Diagnostic Fault Information

Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
Left Front Wheel Speed Sensor 12 V Reference C0035 06 C0035 06 C0035 06 C0035 0F, C0035 18, C0035 5A
Right Front Wheel Speed Sensor 12 V Reference C0040 06 C0040 06 C0040 06 C0040 0F, C0040 18, C0040 5A
Left Rear Wheel Speed Sensor 12 V Reference C0045 06 C0045 06 C0045 06 C0045 0F, C0045 18, C0045 5A
Right Rear Wheel Speed Sensor 12 V Reference C0050 06 C0050 06 C0050 06 C0050 0F, C0050 18, C0050 5A
Left Front Wheel Speed Sensor Low Reference C0035 06 C0035 06 C0035 06 C0035 0F, C0035 18, C0035 5A
Right Front Wheel Speed Sensor Low Reference C0040 06 C0040 06 C0040 06 C0040 0F, C0040 18, C0040 5A
Left Rear Wheel Speed Sensor Low Reference C0045 06 C0045 06 C0045 06 C0045 0F, C0045 18, C0045 5A
Right Rear Wheel Speed Sensor Low Reference C0050 06 C0050 06 C0050 06 C0050 0F, C0050 18, C0050 5A


Component Condition DTCs
Wheel Speed Sensor
• Physical damage

• Debris on the wheel speed sensor or the encoder ring

• Looseness

• Air gap between the wheel speed sensor and the encoder ring too large

• Water intrusion in the wiring harness


0F, 18, 5A


Circuit/System Description

The wheel speeds are detected by active wheel speed sensors and encoder rings. The encoder ring consists of permanent magnets. Each wheel speed sensor receives 12 V reference voltages from the electronic brake control module (EBCM). The wheel speed sensor produces changing current between 7-14 mA on the EBCM signal circuit. As the wheel spins, the EBCM uses the frequency of the square wave signal to calculate the actual wheel speed.

Conditions for Running the DTC

C0035 06 - C0050 06

Ignition ON


C0035 0F - C0050 0F

• Ignition ON

• Vehicle speed is greater than 35 km/h (22 mph)



C0035 18 - C0050 18

• Ignition ON

• Vehicle speed is greater than 10 km/h (6 mph)



C0035 5A - C0050 5A

• Ignition ON

• Vehicle speed is greater than 20 km/h (13 mph)


Conditions for Setting the DTC

C0035 06 - C0050 06

A short to voltage, short to ground or open/high resistance on the wheel speed sensor 12 V reference or low reference circuit is detected for 0.14 second.

C0035 0F - C0050 0F

An erratic wheel speed sensor signal is detected for 0.17 second.

C0035 18 - C0050 18

A missing wheel speed sensor signal is detected for 180 seconds.

C0035 5A - C0050 5A

Difference between fastest and slowest wheel speed is greater than 50% for 30 seconds.

Action Taken When the DTC Sets


• The EBCM disables the ABS, traction control, and stability control for the duration of the ignition cycle.

• The ABS indicator turns ON.

• The traction control/stability control-active indicator turns ON.


Conditions for Clearing the DTC


• A current DTC clears when the diagnostic runs and passes.

• The EBCM will turn OFF the indicator in the next ignition cycle.


Diagnostic Aids


• Do not use a magnet to clean the encoder ring.

• If 2 or more wheel speed sensors are inoperative, diagnose each wheel speed sensor individually.


Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

ABS Description and Operation

Electrical Information Reference


• Circuit Testing

• Connector Repairs

• Testing for Intermittent Conditions and Poor Connections

• Wiring Repairs


Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification


1. Drive the vehicle in a straight line at a speed greater than 20 km/h (13 mph).

2. Verify all scan tool Wheel Speed Sensor parameters are within 1.6 km/h 1 mph of each other.

3. All OK


Circuit/System Testing


1. Ignition OFF, disconnect the harness connector at the appropriate B5 wheel speed sensor, ignition ON.

2. Test for greater than 11 V between the signal circuit terminal B and ground.

2.1. Ignition OFF, disconnect the harness connector at the K17 EBCM.

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

2.3. Test for less than 2 Ω in the signal circuit end to end.

3. Install a 3 A fused jumper wire at the signal circuit terminal B.

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

4.1. Ignition OFF, disconnect the harness connector at the K17 EBCM, ignition ON.

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

4.3. Test for less than 1 V between the low reference circuit and ground.

4.4. Ignition OFF.

4.5. Test for infinite resistance between the low reference circuit and ground.

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

5. Test or replace the B5 wheel speed sensor.


Component Testing

Note

The following wheel speed sensor test is polarity sensitive. The wheel speed sensor can be permanently damaged if the polarity is reversed during the test.



1. Ignition OFF, disconnect the harness connector at the appropriate B5 wheel speed sensor.

2. Connect a 3 A fused jumper wire between the signal terminal B and 12 V.

3. Connect a DMM set to read DC amperage between the low reference terminal A and ground.

4. Spin the wheel very slowly.

5. Test for a DC current switching between a low value of 4-8 mA and a high value of 11-16 mA.

6. All OK.


Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.


• Front Wheel Speed Sensor Replacement

• Rear Wheel Speed Sensor Replacement

• Control Module References for EBCM replacement, programming and setup


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