C0050
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 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/System Description
The wheel speed sensor receives ignition voltage from the electronic brake control module and provides a square wave signal back to the module. As the wheel spins, the electronic brake control module uses the frequency of the square wave signal to calculate the 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 an open/high resistance is detected on a wheel speed sensor signal circuit.
* An open or a high resistance is detected on a wheel speed sensor low reference signal.
C0035 0F - C0050 0F
An erratic wheel speed sensor signal is detected.
C0035 18 - C0050 18
A missing wheel speed sensor signal is detected.
C0035 5A - C0050 5A
Difference between fastest and slowest wheel speed is greater than 50%.
Action Taken When the DTC Sets
* The electronic brake control module 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 electronic brake control module will turn OFF the indicator in the next ignition cycle.
Diagnostic Aids
* Do not use a magnet to clean the encoder ring.
* Inspect the wheel hub bearing encoder ring for rust or corrosion.
* If two or more wheel speed sensors are inoperative, diagnose each wheel speed sensor individually.
* 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 Sunshade - Left (D6I)
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 1.6 km/h (1 mph) of each other.
• If any parameter is not within 1.6 km/h (1 mph) of each other
Refer to Circuit/System Testing.
• If each parameter is within 1.6 km/h (1 mph) of each other
3. All OK.
Circuit/System Testing
Note: If any of the symptom codes 0F, 18 or 5A are set, refer to the Diagnostic Fault Information table for possible mechanical faults or conditions.
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.
• 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 ohm in the signal circuit end to end.
• If 2 ohm or greater, repair the open/high resistance in the circuit.
• If less than 2 ohm, replace the K17 electronic brake control module.
• If 11 V or greater
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.
• 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. Test for less than 1 V between the low reference circuit and ground.
• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V
4. Ignition OFF.
5. Test for less than 2 ohm in the low reference circuit end to end.
• If 2 ohm or greater, repair the open/high resistance in the circuit.
• If less than 2 ohm, replace the K17 electronic brake control module.
• If the parameter changes
5. 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 Front Wheel Speed Sensor Replacement
* Rear Wheel Speed Sensor Replacement (Disc Brake) Rear Wheel Speed Sensor Replacement (Disc Brake)Rear Wheel Speed Sensor Replacement (Drum Brake) Rear Wheel Speed Sensor Replacement (Drum Brake)
* Control Module References Control Module References for electronic brake control module replacement, programming and setup