Circuit Description
Under normal driving conditions, the electronic brake control module (EBCM) monitors the steering angle sensor inputs to see if the steering wheel is moving. If the steering wheel is not moving for a set period of time, the EBCM assumes the vehicle is going in a straight line. At this point, the EBCM looks at the steering angle sensor inputs and considers the degree angle to be zero. This is called the offset value.
Steer angle centering is the process by which the EBCM calibrates the steering sensor output so that the output reads zero when the steering wheel is centered.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC C0710 Steering Position Signal
Conditions for Running the DTC
| • | The ignition is ON. |
| • | The vehicle speed is greater than 40 km/h (25 mph). |
Conditions for Setting the DTC
A malfunction is detected if one or more of the following conditions exist:
| • | The steering angle sensor detects an internal malfunction and sends a controller area network (CAN) message to the EBCM. |
| • | If the offset value is higher than 15 degrees, a malfunction is detected. Malfunction time depends on driving distance, vehicle speed, and the amount of malfunctioning steering angle signal. |
| • | Rapid changes of the steering angle sensor signal cannot occur under normal driving conditions. If the signal change is higher than 2,000 degrees per second or steering angle acceleration is higher than 37,500 degrees per second squared, a malfunction is detected. |
| • | A reference steering angle signal based on a vehicle model is used to check the actual steering angle. If the measured steering angle varies from the reference steering angle by more than a predetermined value, a malfunction is detected. |
Action Taken When the DTC Sets
If equipped, the following actions occur:
| • | The EBCM disables the traction control system (TCS)/vehicle stability enhancement system (VSES) and for the duration of the ignition cycle. |
| • | A malfunction DTC will set. |
| • | The Stability Off indicator turns ON. |
Conditions for Clearing the DTC
| • | The condition for the DTC is no longer present. |
| • | A history DTC will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present. |
| • | Using a scan tool |
| • | The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles. |
Diagnostic Aids
Perform the steering angle sensor centering procedure.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
This test checks to see if any other DTC is set.
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This test checks to see if steering angle sensor is centered.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Antilock Brake System Schematics Connector End View Reference: Antilock Brake System Connector End Views | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
Does the scan tool display any DTC other than DTC C0710? | Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information | Go to Step 3 | |
Perform the steering angle sensor centering procedure. Refer to Steering Angle Sensor Centering . Did you successfully complete the centering procedure? | Go to Step 4 | Go to Step 5 | |
4 |
Did DTC C0710 reset? | Go to Step 6 | Go to Diagnostic Aids |
5 | Replace the steering angle sensor. Refer to Steering Wheel Position Sensor or Steering Shaft Lower Bearing Replacement in Steering Wheel and Column. Did you complete the replacement? | Go to Step 7 | -- |
6 | Replace the electronic brake control module (EBCM). Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 7 | -- |
7 |
Does the DTC reset? | Go to Step 2 | System OK |
