C0196
DTC C0186 or C0196
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 Instructions provides an overview of each diagnostic category.
DTC Descriptors
DTC C0186 00
- Lateral Accelerometer Circuit
DTC C0186 5A
- Lateral Accelerometer Signal Not Plausible
DTC C0196 00
- Yaw Rate Circuit
DTC C0196 5A
- Yaw Rate Signal Not Plausible
Diagnostic Fault Information
Circuit/System Description
The yaw rate and the lateral accelerometer sensors are combined into one sensor, external to the electronic brake control module (EBCM). The vehicle stability enhancement system uses the lateral accelerometer input when calculating the desired yaw rate. The yaw/lateral accelerometer sensor communicates with the EBCM via discrete CAN Bus High and CAN Bus Low serial data circuits.
Conditions for Running the DTC
* Ignition ON.
* Vehicle speed is greater than 20 km/h (13 MPH).
Conditions for Setting the DTC
* Short to ground on the CAN High serial data circuit.
* The yaw/lateral combination 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 ABS indicator turns ON.
* The active handling indicator turns ON, if equipped.
* The driver information center displays SERVICE ANTILOCK BRAKES message.
* The driver information center displays SERVICE TRACTION SYSTEM message.
* The driver information center displays SERVICE ACTIVE HANDLING SYSTEM message, if equipped.
* The electronic brake control module disables the ABS, traction control, and stability control for the duration of the ignition cycle.
Conditions for Clearing the DTC
* When the condition for setting the DTC is no longer present.
* The history DTC will clear after 40 consecutive fault-free ignition cycles have occurred.
Note: During normal diagnostic and/or repair verification technicians may find that the ABS, Traction control and/or Stability control indicators may be ON with NO DTCs displayed by the electronic brake control module. Do not replace the electronic brake control module for this condition.
If the ABS, Traction control and/or Stability control indicators are ON with no DTCs set, perform the following steps:
1. Remove the key from the ignition, open and close the driver's door to turn off retained accessory power, and wait 60 seconds.
2. Ignition ON, if the ABS, Traction Control and/or Stability control indicators are still illuminated, operate the vehicle at speeds greater than 16 km/h (10 MPH) to complete the self test. The electronic brake control module should request all indicators to turn OFF.
3. If indicators remain ON with no DTCs set after the drive cycle, disconnect the battery for at least 60 seconds then reconnect the battery.
4. Operate the vehicle at speeds greater than 40 km/h (25 MPH), the electronic brake control module should request all the indicators to turn OFF.
Reference Information
Schematic Reference
Antilock Brake System Schematics [1][2]Antilock Brakes / Traction Control Systems
Connector End View Reference
Component Connector End Views 5 Bow Lowered Switch (CM7)
Description and Operation
ABS Description and Operation Description and Operation
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 Control Module References for scan tool information
Circuit/System Testing
1. Verify that DTC C0710, U2100, U2142, or U2143 is not set.
• If C0710, U2100, U2142, or U2143 are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle.
2. Ignition OFF, disconnect the harness connector at the yaw/lateral accelerometer sensor.
3. Ignition OFF for 60 seconds, test for less than 5 ohms between the ground circuit terminal 1 and ground.
• If greater than the specified range, test the ground circuit for an open/high resistance.
4. Ignition ON, test for B+ between the ignition voltage circuit terminal 4 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/lateral accelerometer sensor.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
Vehicle Yaw Sensor with Vehicle Lateral Accelerometer Replacement Service and Repair