C0287

DTC C0287

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 C0287 00
- Longitudinal Acceleration Sensor Circuit

DTC C0287 09
- Longitudinal Acceleration Sensor Circuit Rate of Change Above Threshold

DTC C0287 11
- Longitudinal Acceleration Sensor Circuit Above Maximum Threshold

DTC C0287 18
- Longitudinal Acceleration Sensor Circuit Signal Amplitude Less Than Minimum

DTC C0287 4B
- Longitudinal Acceleration Sensor Circuit Calibration Not Learned

Circuit/System Description

The yaw rate, lateral acceleration and longitudinal acceleration sensors are combined into one yaw/lateral accelerometer sensor, external to the electronic brake control module (EBCM). The EBCM supplies a ignition voltage to the yaw/lateral accelerometer sensor. The vehicle stability enhancement system (VSES) uses the longitudinal accelerometer input when calculating the desired yaw rate. The usable output signal is sent by the serial data CAN circuits to the EBCM. The EBCM activates the stability control function depending on the yaw/lateral accelerometer sensor input, the steering angle sensor signal and the vehicle speed.

Conditions for Running the DTC

* Ignition ON
* Ignition voltage is greater than 10 volts.

Conditions for Setting the DTC

C0287 00, 09, 11, 18

The yaw/lateral accelerometer sensor fails an internal self test.

C0287 09

The yaw/lateral accelerometer sensor is not mounted properly.

C0287 4B

The yaw/lateral accelerometer sensor is not calibrated. The longitudinal acceleration sensor signal is not plausible with the yaw rate sensor signal, steering angle sensor signal and vehicle speed.

Action Taken When the DTC Sets

* The EBCM disables the stability control for the duration of the ignition cycle.
* The traction control/stability control-active indicator turns ON.

Conditions for Clearing the DTC

* A current DTC clears when the diagnostic runs and passes.
* The EBCM automatically clears the history DTC when a current DTC is not detected in 40 consecutive drive cycles.

Diagnostic Aids

Possible causes of this DTC are as follows:

* Incorrectly mounted or loose yaw/lateral accelerometer sensor
* Internal failure in the yaw/lateral accelerometer sensor

Reference Information
Schematic Reference

Antilock Brake System Schematics Electrical Diagrams
Connector End View Reference

Component Connector End Views Connector End Views By Name
Description and Operation

ABS Description and Operation ABS Hybrid
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 Testing

1. Ignition ON, verify that DTC U2142, C0186, C0196 or C0292 is not set.

• If DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle.

2. Inspect the yaw/lateral accelerometer sensor for correct installation.

• If loose or incorrect installation is diagnosed, correct the installation of the component refer to Vehicle Yaw Sensor with Vehicle Lateral and Longitudinal Accelerometer Replacement Service and Repair.

3. Ignition OFF, disconnect the harness connector at the yaw/lateral accelerometer sensor.
4. Test for less than 5 ohm between the ground circuit terminal 6 and ground.

• If greater than the specified value, test the ground circuit for an open/high resistance.

5. Ignition ON, test for greater than 10 V between the ignition voltage circuit terminal 1 and ground.

• If less than the specified value, test the ignition voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the EBCM.

6. If all circuits test normal, replace the yaw/lateral accelerometer sensor and verify the DTC does not reset.

• If the DTC resets, replace the EBCM.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.

* Vehicle Yaw Sensor with Vehicle Lateral and Longitudinal Accelerometer Replacement Service and Repair
* Control Module References Programming and Relearningfor EBCM replacement, programming and setup