C0287
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
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Lateral Accelerometer Circuit
DTC C0186 5A
-
Lateral Accelerometer Circuit Plausibility Failure
DTC C0186 71
-
Lateral Accelerometer Circuit Invalid Serial Data Received
DTC C0196 00
-
Yaw Rate Circuit
DTC C0196 5A
-
Yaw Rate Circuit Plausibility Failure
DTC C0196 71
-
Yaw Rate Circuit Invalid Serial Data Received
DTC C0287 71
-
Longitudinal Acceleration Sensor Circuit Invalid Data
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 (EBCM). The EBCM supplies a 12 volt reference voltage to the multi-axis acceleration sensor. The multi-axis acceleration sensor communicates with the EBCM via serial data circuit. The EBCM activates the electronic stability control function depending on multi-axis acceleration sensor input.
Conditions for Running the DTC
* Ignition ON.
* Ignition voltage is greater than 10 V.
Conditions for Setting the DTC
C0186 00
* The lateral acceleration sensor signal is out of specified range for 1.6 s.
* The lateral acceleration sensor signal offset is out of specified range for 0.4 s.
C0196 00
* The yaw rate sensor signal offset is out of specified range for 1.6 s.
* If the yaw rate sensor signal is greater than 10- 23 degrees in 0.4 s.
C0186 5A, C0186 71, C0196 5A, or C0196 71
* The yaw/lateral combination sensor fails an internal self test.
* Communication is lost between the EBCM and the yaw/lateral combination sensor.
* The lateral acceleration sensor signal is not plausible with the yaw rate sensor signal, steering angle sensor signal and vehicle speed for 1.6 s.
C0287 71
The electronic brake control module has received invalid serial data from the longitudinal accelerometer sensor.
Action Taken When the DTC Sets
One or more of the following actions may occur:
* The EBCM disables the traction control system and the electronic stability program for the duration of the ignition cycle.
* The traction control/stability control-active indicator turns ON.
Conditions for Clearing the DTC
* The condition for the DTC is no longer present.
* A current DTC clears when the diagnostic runs and passes.
* The EBCM will turn OFF the indicators and enable the system functions in the next ignition cycle.
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, verify that DTC U0125 or U0126 are not set.
• If the DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle.
2. Verify the steering wheel angle sensor is correctly installed.
• If loose or incorrect installation is diagnosed, correct the installation of the component.
3. Verify the multi-axis acceleration sensor is correctly installed.
• If loose or incorrect installation is diagnosed, correct the installation of the component.
4. Disconnect the harness connector at the multi-axis acceleration sensor.
5. Ignition OFF and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down. Test for less than 10 ohms between the ground circuit terminal 1 and ground.
• If greater than the specified range, test the ground circuit for an open/high resistance.
6. Ignition ON, test for greater than 11 V between the 12 V reference circuit terminal 4 and ground.
• If less than the specified value, test the 12 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the electronic brake control module.
7. If all circuits test normal, replace the multi-axis acceleration sensor and verify the DTC does not reset.
• If the DTC resets, replace the electronic brake control module.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Vehicle Yaw Sensor with Vehicle Lateral Accelerometer Replacement Service and Repair
* Control Module References Control Module References for electronic brake control module replacement, programming and setup