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 Circuit Internal Self Test Failed

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 Internal Self Test Failed

DTC C0196 5A
- Yaw Rate Circuit Plausibility Failure

Diagnostic Fault Information





Circuit/System Description

The yaw rate and the lateral accelerometer sensors are combined into one component. The vehicle stability enhancement system (VSES) uses the lateral accelerometer input when calculating the desired yaw rate. The yaw rate/lat sensor communicates with the EBCM via discrete CAN Bus High and CAN Bus Low serial data circuits.

Conditions for Running the DTC

Ignition ON

Conditions for Setting the DTC

* The yaw/lateral sensor fails an internal self test.
* The yaw/lateral sensor is loose or installed incorrectly.

Action Taken When the DTC Sets

* The EBCM disables the antilock brake system (ABS)/traction control system (TCS) and vehicle stability enhancement system (VSES) for the duration of the ignition cycle.
* A DIC message and/or a warning indicator may be displayed.

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.

Reference Information
Schematic Reference

Antilock Brake System Schematics (Non 2 Mode Hybrid) (Electrical Diagrams)
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. Verify that DTC U1500, U2142 00, U2143 00 is not set.

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

2. Ignition OFF, disconnect the harness connector at the yaw rate/lat sensor.
3. Ignition OFF for 60 seconds, test for less than 5 ohms between the low reference circuit terminal 5 and ground.

• If greater than the specified range, test the low reference circuit for an open/high resistance.

4. Ignition ON, test for B+ between the ignition voltage circuit terminal 3 and ground.

• If not within the specified range, test the ignition voltage circuit for a short to ground or open/high resistance.

5. If all circuits test normal, replace the yaw rate/lat sensor.

Repair Instructions

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

Vehicle Yaw Sensor Replacement (Service and Repair)