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 00: Lateral Accelerometer CircuitDTC C0186 09: Lateral Accelerometer Rate of Change Above Threshold
DTC C0186 11: Lateral Accelerometer Circuit Above Maximum Threshold
DTC C0186 18: Lateral Accelerometer Circuit Signal Amplitude Less Than Minimum
DTC C0186 0A: Lateral Accelerometer Circuit Rate of Change Below Threshold
DTC C0186 4B: Lateral Accelerometer Circuit Calibration Not Learned
DTC C0196 00: Yaw Rate Circuit
DTC C0196 09: Yaw Rate Circuit Rate of Change Above Threshold
DTC C0196 11: Yaw Rate Circuit Above Maximum Threshold
DTC C0196 18: Yaw Rate Circuit Signal Amplitude Less Than Minimum
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 EBCM recieves the yaw/lateral accelerometer sensor data from dedicated serial data circuits.
Conditions for Running the DTC
| • | Ignition ON. |
| • | The ignition voltage is greater than 10 volts. |
Conditions for Setting the DTC
C0186 00, 09, 18, 11 or C0196 00, 09, 11, 18
The yaw/lateral accelerometer sensor fails an internal self test.
C0186 09 or C0196 09
The yaw/lateral accelerometer sensor is not mounted properly.
C0186 4B
The yaw/lateral accelerometer sensor is not calibrated.
Action Taken When the DTC Sets
| • | The EBCM disables the 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 40 consecutive drive cycles. |
Reference Information
Schematic Reference
Antilock Brake System Schematics
Connector End View Reference
Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
C0186 4B
Ignition ON, verify that DTC C0186 4B is not set.
| ⇒ | If the DTC is set, with a scan tool perform the Acceleration Sensor Rest procedure. |
C0186 00, 09, 18, 11 or C0196 00, 09, 11, 18
- Ignition ON, verify that DTC U0125 are not set.
- Verify the yaw/lateral accelerometer is mounted properly.
- Replace the yaw/lateral accelerometer sensor. If the DTC resets, replace the EBCM.
| ⇒ | If the DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle. |
| ⇒ | If not mounted properly, refer to Vehicle Yaw Sensor with Vehicle Lateral and Longitudinal Accelerometer Replacement. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for EBCM replacement, setup, and programming |
