C0036
DTC C0035-C0051
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.
DTC Descriptor
DTC C0035 00
- Left Front Wheel Speed Sensor Circuit
DTC C0036 00
- Left Front Wheel Speed Sensor Circuit Range Performance
DTC C0040 00
- Right Front Wheel Speed Sensor Circuit
DTC C0041 00
- Right Front Wheel Speed Sensor Circuit Range Performance
DTC C0045 00
- Left Rear Wheel Speed Sensor Circuit
DTC C0046 00
- Left Rear Wheel Speed Sensor Circuit Range Performance
DTC C0050 00
- Right Rear Wheel Speed Sensor Circuit
DTC C0051 00
- Right Rear Wheel Speed Sensor Circuit Range Performance
Diagnostic Fault Information
Circuit/System Description
The toothed wheel generates a pulse as it moves past the sensor. Each tooth-gap-tooth series on the wheel generates the pulses. The electronic brake control module (EBCM) uses the frequency of these pulses to determine the wheel speed. The pulse generated depends on the air gap between the sensor and the toothed wheel and on the wheel speed.
Conditions for Running the DTC
* Ignition ON.
* Vehicle speed is greater than 6 km/h (4 mph) with the brake pedal not applied.
OR
* Vehicle speed is greater than 15 km/h (9 mph) and the brake pedal is actuated.
* A DTC is not set for the other wheel speed sensor on the same axle.
Conditions for Setting the DTC
* A short to voltage, short to ground, or an open/high resistance is detected on a wheel speed sensor circuit.
* A malfunctioning WSS.
* There is a problem in the toothed ring.
* Incorrect WSS installed
* Sensor signal out of the calibrated range
* Signal noise via WSS
Action Taken When the DTC Sets
* The EBCM disables the antilock brake system (ABS) for the duration of the ignition cycle.
* The ABS warning indicator turns ON.
* If equipped, a DIC message may be displayed.
* The electronic brake force distribution (EBD) is enabled.
Conditions for Clearing the DTC
* The condition for setting the DTC is no longer present.
* The EBCM clears the history DTC when a current DTC is not detected in 50 consecutive drive cycles.
* The ABS indicator may remain illuminated until a vehicle speed of 13 km/h (8 mph) or greater is achieved.
Diagnostic Aids
If 2 or more wheel speed sensors are inoperative diagnose each wheel speed sensor individually.
Be sure that the speed sensor wiring is properly routed and retained. This will help to prevent false signals due to the pickup of electrical noise.
It is very important to perform a thorough inspection of the wiring and the connectors. Failure to inspect the wiring and the connectors carefully and completely may result in misdiagnosis, causing part replacement with the reappearance of the malfunction.
Important: If the WSS signal fault input to the EBCM, the ABS warning lamp turns ON. If a sensor signal fault can be removed by the scan tool, the ABS warning lamp does not turn OFF. In order to turn ABS warning lamp OFF, you should drive the vehicle up to 12 km/h (7 mph).
You can use the scan tool to monitor wheel speeds during a road test. Watch the wheel speeds being displayed on the scan tool to see if any of the readings are unusual, such as one sensor varying in speed from the other 3, a signal going intermittently high or low, etc. If this does not identify the intermittent, wet the speed sensor harness on the underside of the vehicle and perform a road test, monitoring the wheel speeds with the scan tool.
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. Also rotate steering wheel from stop to stop for intermittent condition caused from open or chaffing of the front wheel speed sensor harness.
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 (Connector Views)
Description and Operation
ABS Description and Operation (Description and Operation)
Electrical Information Reference
* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)
Scan Tool Reference
Control Module References (Programming and Relearning) for scan tool information
Circuit/System Verification
Ignition ON, 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. Test for less than 1 volt between the low reference circuit terminal of the appropriate sensor listed below and ground.
* LF Sensor circuit terminal 9
* RF Sensor circuit terminal 6
* LR Sensor circuit terminal 3
* RR Sensor circuit terminal 11
• If greater than the specified range, test the low reference circuit for a short to voltage.
3. Ignition ON, test for less than 1 volt between the signal circuit terminal of the appropriate sensor listed below and ground.
* LF Sensor circuit terminal 8
* RF Sensor circuit terminal 5
* LR Sensor circuit terminal 2
* RR Sensor circuit terminal 12
• If greater than the specified range, test the signal circuit for a short to voltage.
4. Ignition OFF, test for infinite resistance between the following low reference circuit terminal of the appropriate sensor listed below and ground.
* LF Sensor circuit terminal 9
* RF Sensor circuit terminal 6
* LR Sensor circuit terminal 3
* RR Sensor circuit terminal 11
• If less than the specified value, test the low reference circuit for a short to ground.
5. Ignition OFF, test for infinite resistance between the signal circuit terminal of the appropriate sensor listed below and ground.
* LF Sensor circuit terminal 8
* RF Sensor circuit terminal 5
* LR Sensor circuit terminal 2
* RR Sensor circuit terminal 12
• If less than the specified value, test the signal circuit for a short to ground.
6. Ignition OFF, disconnect the harness connector at the appropriate WSS.
7. Test for less than 2 ohm between the appropriate low reference circuit terminals listed below.
* LF Sensor circuit terminal 9 at the EBCM harness connector and terminal 2 at the WSS harness connector.
* RF Sensor circuit terminal 6 at the EBCM harness connector and terminal 2 at the WSS harness connector.
* LR Sensor circuit terminal 3 at the EBCM harness connector and terminal 2 at the WSS harness connector.
* RR Sensor circuit terminal 11 at the EBCM harness connector and terminal 2 at the WSS harness connector.
• If greater than the specified value, test the low reference circuit for an open or high resistance.
8. Ignition OFF, test for less than 2 ohm between the appropriate signal circuit terminals listed below.
* LF Sensor circuit terminal 8 at the EBCM harness connector and terminal 1 at the WSS harness connector.
* RF Sensor circuit terminal 5 at the EBCM harness connector and terminal 1 at the WSS harness connector.
* LR Sensor circuit terminal 2 at the EBCM harness connector and terminal 1 at the WSS harness connector.
* RR Sensor circuit terminal 12 at the EBCM harness connector and terminal 1 at the WSS 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 appropriate 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 Speed Sensor Replacement (Front Wheel Speed Sensor Replacement)
* Rear Wheel Speed Sensor Replacement (Rear Wheel Speed Sensor Replacement)
* Control Module References (Programming and Relearning) for EBCM replacement, setup, and programming