Antilock Brake System - Non-Hybrid Less than 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 Instructionsprovides an overview of each diagnostic category.
DTC Descriptors
DTC C0710 00
- Steering Position Signal
DTC C0710 5A
- Steering Position Signal Plausibility Failure
Diagnostic Fault Information
Circuit/System Description
The electronic brake control module (EBCM) applies a 5 V reference and provides a low reference to the steering wheel angle sensor and the brake booster vacuum sensor. The EBCM monitors the signal circuit and the three phase circuits to determine the steering wheel position. The EBCM receives three signal inputs from the steering angle sensor. The Phase C Index Pulse signal is only High when the steering wheel is centered or within a few degrees of the straight ahead position. The 2 input signals Phase A and Phase B are approximately 90 degrees out of phase. Once calibrated, the EBCM dynamically interprets the relationship between the Phase A and Phase B 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
* 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 EBCM disables the vehicle stability enhancement system (VSES) for the duration of the ignition cycle.
* The driver information center (DIC) displays the Service Stability System message.
* The antilock brake system (ABS) remains functional.
* The VSES Caution indicator turns ON.
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 100 consecutive drive cycles.
Diagnostic Aids
* During diagnosis, park the vehicle on a level surface.
* The vehicle should not pull in either direction while driving straight on a level surface.
* Find out from the customer the conditions under which the DTC was set. This information will help to duplicate the failure.
* The snapshot function on the scan tool can help find an intermittent DTC.
Reference Information
Schematic Reference
Antilock Brake System Schematics Non-Hybrid Less than 3900 kg (8600 lb) GVW
Connector End View Reference
Component Connector End Views Connector End Views By Name
Description and Operation
ABS Description and Operation ABS (Non-Hybrid Less than 3900 kg (8600 lb) GVW)
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 Relearningfor scan tool information
Circuit/System Verification
1. Ignition ON, observe the scan tool Steering Wheel Position parameter. The reading should correspond with the actual steering wheel position as the steering wheel is turned through its entire range of motion.
2. Observe the scan tool Digital HWPS Index Pulse parameter. The parameter should cycle between Low and High as the steering wheel is centered and then turned through its entire range of motion.
Circuit/System Testing
Note: If only DTC C0710 is set refer to Only DTC C0710 Set, if both DTC C0710 and C1100 are set, refer to Both DTC C0710 and C1100 Set.
Only DTC C0710 Set
1. Ignition OFF, disconnect the harness connector at the steering angle sensor.
2. Ignition OFF, scan tool disconnected, all vehicle systems OFF, this may take up to 2 minutes, test for less than 20 ohm between the low reference circuit terminal 2 and ground.
• If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the EBCM.
3. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal 1 and ground.
• If less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the EBCM.
• If greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the EBCM.
4. Test for 4.8-5.2 V between the 5 V reference circuit terminal 1 and the signal circuit terminal 6.
• If not within the specified range, test the signal circuit for short to voltage or an open/high resistance. If the circuit tests normal, replace the EBCM.
5. Ignition OFF, disconnect the harness connector at the EBCM.
6. Test for infinite resistance between the signal circuit terminal 4 and ground.
• If not the specified value, test the signal circuit for a short to ground.
7. Connect the harness connector at the EBCM.
Note: When measuring voltage, the voltage values are based on a battery charge of 12.5 V and the steering wheel is in the center position.
8. Ignition ON, at the steering angle sensor connector harness, test for 6.8-11 V between the signal circuit terminals listed below and ground.
* Phase A terminal 3
* Phase B terminal 4
* Phase C terminal 5
• If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the EBCM.
• If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the EBCM.
9. If the circuits test normal, replace the steering angle sensor.
Both DTC C0710 and C1100 Set
1. Ignition OFF, disconnect the harness connector at the brake booster vacuum sensor and the steering angle sensor.
2. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminals listed below and ground.
* Terminal 3 at the brake booster vacuum sensor
* Terminal 1 at the steering angle sensor
• If less than the specified range, test both 5 V reference circuits for a short to ground. If the circuits test normal, replace the EBCM.
• If greater than the specified range, test both 5 V reference circuits for a short to voltage. If the circuits test normal, replace the EBCM.
3. If all circuits test normal, test or replace the brake booster sensor or steering angle sensor as required.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Steering Wheel Position Sensor Replacement Steering Wheel Position Sensor Replacement
* Power Brake Booster Vacuum Sensor Replacement Service and Repair
* Control Module References Programming and Relearningfor EBCM replacement, setup and programming