C0186

DTC C0186 or C0196

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview)provides an overview of each diagnostic category.



DTC Descriptors
DTC C0186 00
- Lateral Accelerometer Circuit

DTC C0186 1A
- Lateral Accelerometer Circuit Bias Level Out of Range

DTC C0186 3B
- Lateral Accelerometer Incorrect Component Installed

DTC C0186 5A
- Lateral Accelerometer Circuit Plausibility Failure

DTC C0196 00
- Yaw Rate Circuit

DTC C0196 1A
- Yaw Rate Circuit Bias Level Out of Range

DTC C0196 3B
- Yaw Rate Circuit Incorrect Component Installed

DTC C0196 5A
- Yaw Rate Circuit Plausibility Failure




Circuit/System Description

The lateral accelerometer and the yaw rate sensors are combined into one sensor external to the electronic brake control module (EBCM). The vehicle stability enhancement system (VSES) uses the lateral accelerometer input when calculating the desired yaw rate. The usable output signal is a serial data signal CAN high and CAN low serial data circuits.


Conditions for Running the DTC

Ignition ON.


Conditions for Setting the DTC

* The yaw/lateral accelerometer sensor fails an internal self test.
* Communication is lost between the EBCM and the yaw/lateral accelerometer sensor.
* The correlation error between the yaw/lateral accelerometer sensor and steering angle sensor .



Action Taken When the DTC Sets

* The EBCM disables the VSES for the duration of the ignition cycle.
* The driver information center (DIC) illuminates the warning indicator/message.



Conditions for Clearing the DTC

* The condition for the DTC is no longer present.
* The EBCM clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.



Diagnostic Aids

An incorrectly mounted sensor can cause these faults.


Reference Information
Schematic Reference

Antilock Brake System Schematics ([1][2]Antilock Brakes / Traction Control Systems)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

ABS Description and Operation (Description and Operation)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Control Module References (Programming and Relearning)for scan tool information


Circuit/System Verification

1. Ignition On, verify that DTC C0292 is not set.

• If the DTC is set, Refer to DTC C0292 (C0292) .

2. Verify the yaw/lateral accelerometer is mounted properly.

• If not mounted properly, refer to Vehicle Yaw Sensor with Vehicle Lateral and Longitudinal Accelerometer Replacement (Service and Repair) .

3. Replace the yaw/lateral accelerometer sensor. 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 Relearning)for EBCM replacement, setup, and programming