GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Saab 🢒 2008 🢒 9-7x 🢒 DTC 🢒 DTC C0287

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

DTC Descriptors

DTC C0287 00: Longitudinal Accelerometer Circuit

DTC C0287 11: Longitudinal Accelerometer Circuit Above Maximum Threshold

DTC C0287 3B: Longitudinal Accelerometer Circuit Internal Self-test Failed

DTC C0287 5A: Longitudinal Accelerometer Circuit Plausibility Failure

Circuit/System Description

The electronic brake control module (EBCM) supplies 5 V to the yaw-rate sensor assembly reference circuit and a ground through the yaw-rate sensor low reference circuit, which is shared with the steering angle sensor. The EBCM, yaw-rate sensor assembly and steering angle sensor share a common 12 V supply voltage circuit.

The yaw-rate sensor produces signal output voltage that corresponds to the vehicle rotation around its vertical axis.

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

The EBCM detects a fault in the yaw-rate signal voltage output

Action Taken When the DTC Sets
    • The EBCM disables ESP for the duration of the ignition cycle.
    • The ABS warning lamp, the ABS warning icon and the Trac-Off icon activates.

Conditions for Clearing the DTC
    • The condition for setting the DTC is no longer present.
    • 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.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Component Connector End Views

Electrical Information Reference

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

Scan Tool Reference

Control Module References

Circuit/System Verification

With scan tool installed, clear the DTCs then drive the vehicle in a straight line at a speed greater than 15 km/h (9 mph). If the DTC did not set as a current DTC see diagnostic aids.

Circuit/System Testing
  1. Ignition OFF, disconnect the yaw-rate/lateral accelerometer connector.
  2. Test the yaw-rate/lateral sensor reference voltage circuit for a short to voltage, short to ground, an open or high resistance.
    3. ⇒If the reference voltage circuit did not test normal, repair the circuit.
  3. Test the yaw/lateral sensor ground circuit for an open or high resistance.
    4. ⇒If the reference ground circuit did not tests normal, repair the circuit.
  4. Test the yaw/lateral sensor CAN HI and LO circuit for a short to voltage, short to ground, an open or high resistance.
    5. ⇒If the yaw/lateral CAN HI and LO circuits did not test normal repair the circuit.
  5. Ignition ON, test the yaw/lateral sensor reference voltage circuit for 5 volts, and the ground circuit for an open or high resistance.
    6. ⇒If the yaw/lateral 5 volt reference and ground circuits test normal replace the yaw/lateral sensor.
    ⇒If the yaw/lateral 5 volt reference and ground circuits did not test normal replace the EBCM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for EBCM replacement, setup, and programming