GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 HUMMER 🢒 2008 🢒 H2 🢒 Brakes 🢒 Antilock Brake System 🢒 DTC C0710

Diagnostic Instructions
    • Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
    • Review Strategy Based Diagnosis for an overview of the diagnostic approach.
    •  Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC C0710 00: Steering Position Signal

Circuit/System Description

The electronic brake control module (EBCM) receives a digital and an analog steering wheel position signal from one sensor. The EBCM uses the steering wheel position sensor (SWPS) signals to perform Vehicle Stability Enhancement System (VSES). The analog and digital data parameters on the scan tool normally range from +220° to -220°. With the steering and steering wheel centered, the analog data parameter on the scan tool should display near 0°. The digital data parameter will calibrate to 0° after each key cycle regardless of actual steering wheel position. The EBCM verifies the accuracy of the steering wheel position signal by correlating the digital and analog signals together.

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC
    • Vehicle speed is greater than 15 km/h (9 mph), the steering angle does not change more than 10 degrees in 20 seconds and the yaw rate is 8.6 degrees/sec or more.
    • The digital and analog steering wheel position signals do not correlate.

Action Taken When the DTC Sets
    • The EBCM disables the VSES for the duration of the ignition cycle.
    • A DIC message and/or a warning message may be displayed.

Conditions for Clearing the DTC
    • The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
    • 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.
    • Inspect the vehicle for proper alignment. The car 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

Connector End View Reference

Component Connector End Views

Description and Operation

ABS Description and Operation

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

With scan tool installed, clear the DTCs. Turn the steering wheel through its full range and back to straight ahead to center SAS. Using a scan tool, observe the Steering Wheel Position parameter changes smoothly while turning steering wheel through the entire range. Correlate zero reading with wheels in the straight ahead position. Drive the vehicle through a variety of maneuvers turning to the left, and to the right and straight line at a speed greater than 20 km/h (13 mph).

⇒If the DTC did not set as a current DTC see diagnostic aids.

Circuit/System Testing

Important: It is recommended that testing ground circuits to wait 2 minutes with the key off before performed the circuit test.

  1. Ignition OFF, disconnect the harness connector at the SAS.
  2. Test for less than 10 ohm between the low reference circuit terminal 2 and ground.
    3. ⇒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 volts between the 5-volt reference circuit terminal 1 and ground.
    4. ⇒If less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the EBCM.
  4. Test for 4.8-5.2 volts between the 5-volt reference circuit terminal 1 and the signal circuit terminal 6.
    5. ⇒If less than the specified range, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the EBCM.
  5. Ignition OFF, reconnect the SAS.
  6. Disconnect the EBCM harness connector.
  7. Test for infinite resistance between the signal circuit pin 6 and ground.
    8. ⇒If less than the specified range, test the signal circuit for a short to ground.
  8. Disconnect the SAS.
  9. Reconnect the EBCM harness connector.
  10. Ignition ON, test voltage of phase  A terminal 3, phase B terminal 4, and phase C terminal 5. Verify that the reading is battery positive voltage for each of the three phases.
    11. ⇒If not the specified value, test the phase  A phase B, and phase C circuits for a short to ground or an open/high resistance. If the circuit tests normal, replace the EBCM.
  11. Ignition OFF, reconnect the SAS. Turn the ignition ON. Using the scan tool, rotate the steering wheel and observe the SAS. Verify the sensor sweeps through the entire range while monitoring the steering wheel as it rotates in degrees from the input signals between circuit phase A and the signal circuit phase B. The rotation in degrees should vary between phase A and phase B without any spikes or dropouts.
    12. ⇒If not within the specified range or is erratic, replace the steering angle sensor.
  12. If the sensor test normal, replace the EBCM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for EBCM and BPMV replacement, setup, and programming