Chevrolet Trax: DTC C0186, C0196, OR C0287: Lateral acceleration sensor/yaw rate sensor/lateral acceleration sensor

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 Descriptors

DTC C0186

Lateral Acceleration Sensor Signal

DTC C0196

Yaw Rate Signal

DTC C0287

Longitudinal Acceleration Sensor Signal

For symptom byte information refer to Symptom Byte List .

Circuit/System Description

The yaw rate, lateral acceleration and longitudinal acceleration sensors are combined into one multi-axis acceleration sensor, internal to the inflatable restraint sensing and diagnostic module. The multi-axis acceleration sensor communicates with the electronic brake control module via serial data. The electronic brake control module activates the stability control function depending on the multi-axis acceleration sensor input.

The inflatable restraint sensing and diagnostic module uses the multi-axis acceleration sensor to determine if the vehicle is in a roll over or near collision incident.

Conditions for Running the DTC

C0186 00, C0196 00, or C0287 00

Ignition ON

C0186 5A, or C0287 5A

Drive the vehicle straight ahead with constant velocity greater than 30 km/h (18.6 MPH), then turn right and then turn left.

C0196 5A

Vehicle at standstill for 10 s, then drive the vehicle straight ahead with constant velocity greater than 20 km/h (12.4 MPH).

Conditions for Setting the DTC

C0186 00

• An internal fault in multi-axis acceleration sensor will set this DTC.
• Improperly mounted or loose inflatable restraint sensing and diagnostic module may set this DTC.

C0186 5A

• An internal fault in multi-axis acceleration sensor.
• Improperly mounted or loose inflatable restraint sensing and diagnostic module.
• The lateral acceleration signal is not plausible with the lateral acceleration signal, the steering wheel angle sensor signal and the vehicle speed.

C0196 00

The yaw rate signal is out of the specified range.

C0196 09

The yaw rate signal is changing faster than physically possible.

C0196 5A

• Improperly mounted or loose inflatable restraint sensing and diagnostic module may set this DTC.
• The yaw rate signal is not plausible with the lateral acceleration signal, the steering wheel angle sensor signal and the vehicle speed.

C0287 00

The longitudinal acceleration signal is out of the specified range.

C0287 5A

• An internal fault in multi-axis acceleration sensor will set this DTC.
• The longitudinal acceleration signal is not plausible with the vehicle acceleration.

Action Taken When the DTC Sets

• The air bag indicator turns ON.
• The traction/stability control indicator turns ON.
• The electric brake control module disables the electronic stability control and the hill start assist for the duration of the ignition cycle.

Conditions for Clearing the DTC

• A current DTC clears when the diagnostic runs and passes.
• The history DTC will clear after 40 consecutive fault-free ignition cycles have occurred.

Reference Information

Schematic Reference

Antilock Brake System Schematics(Encore), Antilock Brake System Schematics (Trax)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - (Trax)

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

1. Verify the K36 Inflatable Restraint Sensing and Diagnostic Module is installed correctly.

If loose or incorrect installation

Correct the installation or replace the component

If correct installation

2. Verify DTC C0186, C0196, or C0287 is not set in the K36 Inflatable Restraint Sensing and Diagnostic Module

If any of the DTCs are set

Perform the Vehicle Yaw Sensor Learn.

If none of the DTCs are set

3. Verify DTC C0186, C0196, or C0287 is not set in the K17 Electronic Brake Control Module.

If any of the DTCs are set

1. Replace the K36 Inflatable Restraint Sensing and Diagnostic Module.
2. Verify the DTC does not set while operating the vehicle within the Conditions for Running the DTC.

• If the DTC sets, replace the K17 Electronic Brake Control Module.
• If the DTC does not set

3. All OK.

If none of the DTCs are set

4. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for Electronic Brake Control Module or Inflatable Restraint Sensing and Diagnostic Module replacement, programming and setup

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