Antilock Brake System - Non-Hybrid Greater than/Equal to 3900 kg (8600 lb) GVW
DTC C0710
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 C0710 17
- Steering Position Signal Shape/Waveform Failure
DTC C0710 55
- Steering Position Signal Expected Number of Transitions/Events not Reached
DTC C0710 5A
- Steering Position Signal Plausibility Failure
DTC C0710 0F
- Steering Position Signal Erratic
Diagnostic Fault Information
Circuit/System Description
The electronic brake control module (EBCM) supplies a 5 V reference and provides a low reference to the steering angle sensor. The EBCM monitors the signal circuit and the three phase circuits to determine the steering wheel position. The EBCM receives a analog signal and two digital signal inputs from the steering angle sensor. The analog signal is 2.5 V when the steering wheel is centered or within a few degrees of the straight ahead position. The analog signal is used to track the first 225° of rotation in either direction. The EBCM dynamically interprets the relationship between the Phase A and Phase B digital inputs, and determines the position of the steering wheel and the direction of the steering wheel rotation.
Conditions for Running the DTC
* The ignition is ON.
* Ignition voltage is greater than 9 V.
Conditions for Setting the DTC
C0710 17
The steering angle sensor analog signal is less than 0.4 V or greater than 4.6 V.
C0710 55
The steering wheel angle does not change but the yaw signal is changing while the vehicle speed is greater than 15 km/h (10 mph) and is not in electronic stability control event.
C0710 5A
* The steering wheel angle and the actual vehicle turning rate disagree.
* The steering wheel angle sensor analog signal and digital signal do not agree.
* The steering wheel angle sensor signal has a value greater than physically possible.
C0710 0F
The steering wheel angle sensor detects an impossibly fast steering angle movement.
Conditions for Setting the DTC
* Opens, short to ground, or short to voltage.
* The calculated steering angle from the steering angle sensor does not correlate with the steering angle calculated from the yaw rate.
Action Taken When the DTC Sets
* The Stability indicator turns ON.
* The antilock brake system remains functional.
* The driver information center displays the Service Stability System message.
* The EBCM disables the vehicle stability enhancement system for the duration of the ignition cycle.
Conditions for Clearing the DTC
* The condition for the DTC is no longer present.
* The EBCM automatically clears the history DTC when a current DTC is not detected in 40 consecutive drive cycles.
Diagnostic Aids
* During diagnosis, park the vehicle on a level surface.
* The snapshot function on the scan tool can help find an intermittent DTC.
* Verify the steering wheel and steering wheel angle sensor is installed correctly.
* The vehicle should not pull in either direction while driving straight on a level surface.
* Verify the steering shaft coupling to the steering gear is properly installed and aligned.
* Find out from the customer the conditions under which the DTC was set. This information will help to duplicate the failure.
* During high humidity conditions, condensation from the HVAC system may cause this DTC. If this DTC is reoccurring or set as a history code, inspect the steering angle sensor connector for water intrusion or corrosion.
* Confirm that all tires are of the proper size and that all are matching brands. Check and adjust all tires to the stated cold air pressure as identified on the tire placard. If a mis-sized or non-matching brand tire is present, inform the customer that in order for the vehicle stability enhanced system to function normally, tires need to be a uniform size and rolling diameter.
* To correct a fretting condition disconnect the suspect connector and add Nyogel lubricant 760G (dielectric grease) to both sides of the connector terminals. Then reconnect the connector and wipe away any excess lubricant. This will correct the additional terminal contact resistance due to the terminal fretting corrosion.
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 (M30)
Description and Operation
ABS Description and Operation (Without JL4) Description and OperationABS Description and Operation (With JL4) 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
Note: If the condition is intermittent or cannot be duplicated, disconnect the connectors and add Nyogel lubricant 760G. This procedure will correct the high resistance condition due to terminal fretting corrosion.
1. Ignition ON.
2. Verify the scan tool Steering Wheel Position parameter corresponds to the actual steering wheel position as the steering wheel is turned through its entire range of motion.
• If the parameter does not correspond with the steering wheel position or the reading is erratic
Refer to Circuit/System Testing.
• If the parameter corresponds with the steering wheel position
3. Verify the scan tool Digital SWPS Phase A parameter cycles between Low and High as the steering wheel is centered and then turned through its entire range of motion.
• If the parameter does not cycle between Low and High as the steering wheel is turned
Refer to Circuit/System Testing.
• If the parameter cycles between Low and High as the steering wheel is turned
4. Verify the scan tool Digital SWPS Phase B parameter cycles between Low and High as the steering wheel is centered and then turned through its entire range of motion.
• If the parameter does not cycle between Low and High as the steering wheel is turned
Refer to Circuit/System Testing.
• If the parameter cycles between Low and High as the steering wheel is turned
5. All OK.
Circuit/System Testing
1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the steering angle sensor. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for less than 20 ohms between the low reference circuit terminal 2 and ground.
• If 20 ohms or greater
1. Ignition Off, disconnect the harness connector at the EBCM.
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 EBCM.
• If less than 20 ohms
3. Ignition ON.
4. Test for 4.8-5.2 V between the 5 V reference circuit terminal 1 and ground.
• If less than 4.8 V
1. Ignition OFF, disconnect the harness connector at the EBCM.
2. Test for infinite resistance between the 5 V reference circuit and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance
3. Test to less than 2 ohms in the 5 V reference circuit end to end.
• If 2 ohms for greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the EBCM.
• If greater than 5.2 V
1. Ignition OFF, disconnect the harness connector at the EBCM, ignition ON.
2. Test for less than 1 V between the 5 V reference circuit terminal 1 and ground
• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V, replace the EBCM.
• If between 4.8-5.2 V
5. Test for 4.8-5.2 V between the 5 V reference circuit terminal 1 and the signal circuit terminal 6.
• If less than 4.8 V
1. Ignition OFF, disconnect the harness connector at the EBCM.
2. Test for less than 2 ohms in the signal circuit end to end.
• If greater than 2 ohms, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the EBCM.
• If greater than 5.2 V
1. Ignition OFF, disconnect the harness connector at the EBCM, ignition ON.
2. Test for less than 1 V between the signal circuit and ground.
• If greater than 1 V, repair the short to voltage on the circuit.
• If less than 1 V, replace the EBCM.
• If between 4.8-5.2 V
6. Ignition OFF, disconnect the harness connector at the EBCM.
7. Test for infinite resistance between the signal circuit terminal 9 and ground.
• If less than infinite resistance
Repair the short to ground on the circuit.
• If infinite resistance
8. Connect the harness connector at the EBCM.
9. Ignition ON.
Note: When measuring voltage at the steering angle sensor harness connector, the voltage values are based on a battery charge of 12.5 V and the steering wheel is in the center position.
10. Test for 6.8-11.7 V between the signal circuit terminals listed below and ground with the steering wheel in the center position.
* Terminal 3
* Terminal 4
* Terminal 5
• If less than 6.8 V
1. Ignition OFF, disconnect the harness connector at the EBCM.
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 on 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 EBCM.
• If greater than 11.7 V
1. Ignition OFF, disconnect the harness connector at the EBCM, 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, replace the EBCM.
• If between 6.8-11.7 V
11. Test or replace the steering angle sensor.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Steering Wheel Position Sensor Replacement Steering Wheel Position Sensor Replacement
* Control Module References Control Module References for EBCM replacement, programming and setup