C0050
DTC C0035-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 00
-
Left Front Wheel Speed Sensor Circuit
DTC C0035 0F
-
Left Front Wheel Speed Sensor Circuit Erratic Signal
DTC C0035 18
-
Left Front Wheel Speed Sensor Circuit Signal Amplitude Less Than Minimum
DTC C0040 00
-
Right Front Wheel Speed Sensor Circuit
DTC C0040 0F
-
Right Front Wheel Speed Sensor Circuit Erratic Signal
DTC C0040 18
-
Right Front Wheel Speed Sensor Circuit Signal Amplitude Less Than Minimum
DTC C0045 00
-
Left Rear Wheel Speed Sensor Circuit
DTC C0045 0F
-
Left Rear Wheel Speed Sensor Circuit Erratic Signal
DTC C0045 18
-
Left Rear Wheel Speed Sensor Circuit Signal Amplitude Less Than Minimum
DTC C0050 00
-
Right Rear Wheel Speed Sensor Circuit
DTC C0050 0F
-
Right Rear Wheel Speed Sensor Circuit Erratic Signal
DTC C0050 18
-
Right Rear Wheel Speed Sensor Circuit Signal Amplitude Less Than Minimum
Diagnostic Fault Information
Circuit/System Description
The wheel speed sensor receives ignition voltage from the electronic brake control module (EBCM) and provides an output signal to the EBCM. As the wheel spins, the wheel speed sensor sends the EBCM a DC square wave signal. The EBCM uses the frequency of the square wave signal to calculate the wheel speed.
Conditions for Running the DTC
C0035-C0050 00
* The ignition is ON.
* Ignition voltage is greater than 8 volts.
C0035-C0050 0F
* The ignition is ON.
* Ignition voltage is greater than 8 volts.
* The brake pedal is not pressed.
* A DTC is not set for the other wheel speed circuit on the same axle.
C0035-C0050 18
* The ignition is ON.
* Ignition voltage is greater than 8 volts.
* The brake pedal is not pressed.
* No other wheel speed circuit DTCs are set.
* At least two other wheel speeds are not 0 km/h.
Conditions for Setting the DTC
C0035-C0050 00
An open, a short to ground or a short to voltage is detected on the wheel speed sensor signal circuit by the EBCM.
C0035-C0050 0F
If the EBCM detects a change in wheel speed that exceeds 20 km/h (12 mph) between two 10-millisecond wheel speed samples. If the condition occurs 3 times in 200 milliseconds, the code is set.
C0035-C0050 18
The code is set when the following conditions exist:
* One wheel speed is 0 km/h.
* The remaining wheel speeds are greater than 8 km/h (5 mph).
* The difference between the remaining wheel speeds is less than 11 km/h (7 mph) from each other.
Action Taken When the DTC Sets
If equipped, the following actions occur:
* The EBCM disables the ABS/TCS for the duration of the ignition cycle.
* The ABS indicator illuminates.
* The Traction OFF indicator illuminates.
* If the other wheel speed sensor on the same axle sets an additional DTC, the EBCM disables the DRP for the duration of the ignition cycle.
* When the EBCM disables DRP, the red Brake warning indicator illuminates.
Diagnostic Aids
C0035-0050 18
Under the following conditions, two Wheel Speed Sensor Input is 0 and DTCs are set:
* The two suspect wheel speeds equal zero for 6 seconds.
* The other wheel speeds are greater than 16 km/h (10 mph).
* The other wheel speeds are within 11 km/h (7 mph) of each other.
Diagnose each wheel speed sensor individually.
C0035-C0050 18, 0F, 00
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. If the DTC is not current, clear all DTCs and simulate the effects of water intrusion by using the following procedure:
1. Spray the suspected area with a 5 percent saltwater solution. To create a 5 percent saltwater solution, add 2 teaspoons of salt to 8 fl oz of water (10 g of salt to 200 ml of water).
2. Test drive the vehicle over various road surfaces: bumps, turns, etc., above 40 km/h (25 mph) for at least 30 seconds.
3. If the DTC returns, replace the suspected wheel speed sensor or repair the wheel speed sensor wiring.
4. Rinse the area thoroughly when completed.
Reference Information
Schematic Reference
Antilock Brake System Schematics [1][2]Antilock Brakes / Traction Control Systems
Connector End View Reference
Component Connector End Views 1-2 Shift Solenoid (SS) Valve (MN5)
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 Programming and Relearning for scan tool information
Circuit/System Verification
Observe the scan tool Wheel Speed Sensor parameter. The reading should be the same speed on all sensors when driving in a straight line at a speed greater than 20 km/h (13 mph).
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the EBCM.
2. Ignition ON, test for less than 1 V between the ignition voltage circuit terminal of the appropriate sensor listed below and ground.
* Left front sensor circuit terminal 45
* Right front sensor circuit terminal 34
* Left rear sensor circuit terminal 36
* Right rear sensor circuit terminal 43
• If greater than the specified range, test the ignition voltage circuit for a short to voltage.
3. Test for less than 1 V between the signal circuit terminal of the appropriate sensor listed below and ground.
* Left front sensor circuit terminal 46
* Right front sensor circuit terminal 33
* Left rear sensor circuit terminal 37
* Right rear sensor circuit terminal 42
• If not the specified value, test the signal circuit for a short to voltage.
4. Ignition OFF, test for infinite resistance between the ignition voltage circuit terminal of the appropriate sensor listed below and ground.
* Left front sensor circuit terminal 45
* Right front sensor circuit terminal 34
* Left rear sensor circuit terminal 36
* Right rear sensor circuit terminal 43
• If not the specified value, test the ignition voltage circuit for a short to voltage.
5. Test for infinite resistance between the signal circuit terminals of the appropriate sensor listed below and ground.
* Left front sensor circuit terminal 46
* Right front sensor circuit terminal 33
* Left rear sensor circuit terminal 37
* Right rear sensor circuit terminal 42
• If not the specified value, test the signal circuit for a short to ground.
6. Ignition OFF, disconnect the harness connector at the appropriate wheel speed sensor.
7. Ignition OFF, test for less than 2 ohms between the appropriate ignition voltage circuit terminals listed below.
* Left front sensor circuit terminal 45 at the EBCM harness connector and terminal B at the wheel speed sensor harness connector.
* Right front sensor circuit terminal 34 at the EBCM harness connector and terminal B at the wheel speed sensor harness connector.
* Left rear sensor circuit terminal 36 at the EBCM harness connector and terminal B at the wheel speed sensor harness connector.
* Right rear sensor circuit terminal 43 at the EBCM harness connector and terminal B at the wheel speed sensor harness connector.
• If greater than the specified value, test the ignition voltage circuit for an open or high resistance.
8. Test for less than 2 ohms between the appropriate signal circuit terminals listed below.
* Left front sensor circuit terminal 46 at the EBCM harness connector and terminal A at the wheel speed sensor harness connector.
* Right front sensor circuit terminal 33 at the EBCM harness connector and terminal A at the wheel speed sensor harness connector.
* Left rear sensor circuit terminal 37 at the EBCM harness connector and terminal A at the wheel speed sensor harness connector.
* Right rear sensor circuit terminal 42 at the EBCM harness connector and terminal A at the wheel speed sensor harness connector.
• If greater than the specified value, test the signal circuit for an open or high resistance.
9. If all circuits test normal, replace the wheel speed sensor. If the DTC resets, replace the EBCM.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Front Wheel Bearing and Hub Replacement Front Suspension
* Rear Wheel Bearing and Hub Replacement Rear Suspension
* Control Module References Programming and Relearning for EBCM replacement, setup, and programming