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 5A
-
Lateral Acceleration Sensor Signal Not Plausible
DTC C0186 71
-
Lateral Acceleration Sensor Signal Invalid Data
DTC C0196 5A
-
Yaw Rate Circuit Not Plausible
DTC C0196 71
-
Yaw Rate Circuit Invalid Data
DTC C0287 5A
-
Longitudinal Acceleration Sensor Circuit Not Plausible
DTC C0287 71
-
Longitudinal Acceleration Sensor Circuit Invalid Data
Diagnostic Fault Information
Circuit/System Description
The lateral accelerometer and the yaw rate sensors are combined into one sensor called the multi-axis acceleration sensor. The electronic brake control module supplies 12 V reference to the multi-axis acceleration sensor. The multi-axis acceleration sensor communicates with the electronic brake control module via serial data. The module activates the stability control function depending on multi-axis acceleration sensor input.
Conditions for Running the DTC
Ignition ON.
Conditions for Setting the DTC
C0186 5A, C0186 71, C0196 5A, or C0196 71
* The multi-axis acceleration sensor reports an internal failure.
* The multi-axis acceleration sensor learned the wrong offset value.
* Incorrectly mounted multi-axis acceleration sensor.
C0287 5A
The longitudinal acceleration sensor signal may not be plausible with the vehicle speed.
C0287 71
The electronic brake control module received an invalid longitudinal acceleration sensor signal.
Action Taken When the DTC Sets
* The traction/stability control indicator turns ON.
* The electronic brake control module disables the electronic stability control system for the duration of the ignition cycle.
Conditions for Clearing the DTC
* The condition for setting the DTC is no longer present.
* The history DTC will clear after 40 consecutive fault-free ignition cycles have occurred.
Reference Information
Schematic Reference
Antilock Brake System Schematics [1][2]Antilock Brakes / Traction Control Systems
Connector End View Reference
Component Connector End Views Fuel Pump and Level Sensor Assembly
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. Ignition ON.
2. Verify that no U codes are set.
• If any U codes are set
Refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle.
• If no U codes are set
3. Ignition OFF, scan tool disconnected, 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.
4. Test for less than 10 omhs between the ground circuit terminal 6 and ground.
• If 10 omhs or greater
1. Ignition OFF
2. Test for less than 2 omhs in the ground circuit end to end.
• If 2 omhs or greater, repair the open/high resistance in the circuit.
• If less than 2 omhs, repair the open/high resistance in the ground connection.
• If less than 10 omhs
5. Ignition ON.
6. Verify that a test lamp illuminates between the 12 V reference circuit terminal 5 and ground.
• If the test lamp does not illuminate
1. Ignition OFF, disconnect the harness connector at the K17 electronic brake control module.
2. Test for infinite resistance between the 12 V reference 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 ohms in the 12 V reference circuit end to end.
• If 2 omhs or greater, repair the open/high resistance in the circuit.
• If less than 2 omhs, replace the K17 electronic brake control module.
• If the test lamp illuminates
7. Replace the B119 multi-axis acceleration sensor.
8. 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
9. All OK.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Vehicle Yaw Sensor Replacement Service and Repair
* Control Module References Control Module References for electronic brake control module replacement, programming and setup