C0186
DTC C0186, C0196, or C0287
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 Acceleration Sensor Signal Malfunction
DTC C0186 09
- Lateral Acceleration Sensor Signal Too Fast Transitions
DTC C0186 11
- Lateral Acceleration Sensor Signal High Input
DTC C0186 18
- Lateral Acceleration Sensor Signal Low Signal Amplitude
DTC C0196 00
- Yaw Rate Signal Malfunction
DTC C0196 09
- Yaw Rate Signal Too Fast Transitions
DTC C0196 0A
- Yaw Rate Signal Too Slow Transitions
DTC C0196 11
- Yaw Rate Signal High Input
DTC C0196 18
- Yaw Rate Circuit Signal Low Signal Amplitude
DTC C0287 00
- Longitudinal Acceleration Sensor Circuit Malfunction
DTC C0287 09
- Longitudinal Acceleration Sensor Circuit Too Fast Transitions
DTC C0287 11
- Longitudinal Acceleration Sensor High Input
DTC C0287 18
- Longitudinal Acceleration Sensor Circuit Low Signal Amplitude
Diagnostic Fault Information
Circuit/System Description
The yaw rate, lateral acceleration and longitudinal acceleration sensors are combined into one multi-axis acceleration sensor, external to the electronic brake control module. The electronic brake control module supplies ignition voltage to the multi-axis acceleration sensor. 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 multi-axis acceleration sensor input.
Conditions for Running the DTC
* Vehicle ON or Vehicle in Service Mode.
* The ignition voltage is greater than 10 V.
Conditions for Setting the DTC
C0186 00, C0186 11, C0186 18, C0196 0A, C0287 00, C0287 09, C0287 11 or C0287 18
The multi-axis acceleration sensor fails an internal self test.
C0196 00, C0196 11, or C0196 18
The yaw sensor is out of specified range.
C0186 09, C0196 09, C0287 00, C0287 09 or C0287 11
The multi-axis acceleration sensor is not mounted properly.
Action Taken When the DTC Sets
* The stability control indicator turns ON.
* The Service StabiliTrak message is displayed on the driver information center.
* The electronic brake control module disables the electronic stability system for the duration of the ignition cycle.
Conditions for Clearing the DTC
* In order for the DTC to clear the electronic stability control system must be initialized. Perform the steps listed below to initialize the system:
1. Vehicle OFF, open the driver door and remove all keyless entry transmitters from the vehicle and secure in a place outside the vehicle.
2. Close the driver door and let the vehicle sit for 3 minutes.
3. Vehicle ON, leave the vehicle in Park for greater than 10 seconds.
4. Drive the vehicle in a straight line at a speed greater than 32 km/h (20 mph) for 30 seconds.
* The condition for setting the DTC is no longer present.
* The history DTC will clear after 40 consecutive fault-free drive cycles have occurred.
Diagnostic Aids
DTC C0196 may have been improperly set due to the vehicle being transported on a flat bed truck, car hauler, or by train without it being completely shut down. The electronic stability control system may need to be initialized before the DTC will clear. Refer to Conditions for Clearing the DTC above.
Reference Information
Schematic Reference
Antilock Brake System Schematics [1][2]Antilock Brakes / Traction Control Systems
Connector End View Reference
Component Connector End Views Hybrid/EV Battery Pack X1
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 Programming and Relearning for scan tool information
Circuit/System Verification
Note: DTC C0196 may have been improperly set due to the vehicle being transported on a flat bed truck, car hauler, or by train without it being completely shut down. The electronic stability control system may need to be initialized before the DTC will clear. Refer to Conditions for Clearing the DTC.
1. Vehicle in Service Mode.
2. Verify that DTC U0125 is not set.
• If the DTC is set
Refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle.
• If the DTC is not set
3. Verify the B119 multi-axis acceleration sensor is installed correctly.
• If loose or incorrect installation
Correct the installation of the component.
• If installed correctly
4. Perform the Vehicle Yaw Sensor Learn Testing and Inspection.
5. Verify the DTC does not set while operating the vehicle under the Conditions for Running the DTC.
• If the DTC sets
Refer to Circuit/System Testing.
• If the DTC does not set
6. All OK.
Circuit/System Testing
Note: DTC C0196 may have been improperly set due to the vehicle being transported on a flat bed truck, car hauler, or by train without it being completely shut down. The electronic stability control system may need to be initialized before the DTC will clear. Refer to Conditions for Clearing the DTC.
1. Vehicle OFF and all vehicle systems OFF, disconnect the harness connector at the B119 multi-axis acceleration sensor. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for less than 10 ohm between the ground circuit terminal 6 and ground.
• If 10 ohm or greater
1. Vehicle OFF.
2. Test for less than 2 ohm in the ground circuit end to end.
• If 2 ohm or greater, repair the open/high resistance in the circuit.
• If less than 2 ohm, repair the open/high resistance in the ground connection.
• If less than 10 ohm
3. Vehicle in Service Mode.
4. Verify that a test lamp illuminates between the ignition circuit terminal 5 and ground.
• If the test lamp does not illuminate
1. Vehicle OFF, disconnect the harness connector at the K17 electronic brake control module.
2. Test for infinite resistance between the ignition circuit and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance
3. Test for less than 2 ohm in the ignition circuit end to end.
• If 2 ohm or greater, repair the open/high resistance in the circuit.
• If less than 2 ohm, replace the K17 electronic brake control module.
• If the test lamp illuminates
5. Replace the B119 multi-axis acceleration sensor.
6. Verify the DTC does not set while operating the vehicle under the Conditions for Running the DTC.
• If the DTC sets
Replace the K17 electronic brake control module.
• If the DTC does not set
7. All OK.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Vehicle Yaw Sensor with Vehicle Lateral and Longitudinal Accelerometer Replacement Service and Repair
* Control Module References Programming and Relearning for electronic brake control module replacement, programming and setup