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C019B




DTC C0186, C018B, C0196, C019B, 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 Circuit Malfunction

DTC C0186 4B
- Lateral Acceleration Sensor Circuit Calibration Not Learned

DTC C0186 5A
- Lateral Acceleration Sensor Circuit Not Plausible

DTC C0186 71
- Lateral Acceleration Sensor Circuit Invalid Data

DTC C018B 5A
- Lateral Acceleration Sensor Signal Not Plausible

DTC C0196 00
- Yaw Rate Circuit Malfunction

DTC C0196 5A
- Yaw Rate Signal Not Plausible

DTC C0196 71
- Yaw Rate Signal Invalid Data

DTC C019B 5A
- Yaw Rate Signal Not Plausible

DTC C0287 4B
- Longitudinal Acceleration Sensor Circuit Calibration Not Learned

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 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 V reference voltage to the multi-axis acceleration sensor. The multi-axis acceleration sensor communicates with the EBCM via the high speed controller area network (CAN) serial data circuit. The EBCM 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 4B

The lateral acceleration sensor is not calibrated.

C0186 5A
* The lateral acceleration sensor signal offset is out of specified range.
* The lateral acceleration sensor signal is not plausible with the yaw rate sensor signal, steering angle sensor signal and vehicle speed.

C0186 71

The EBCM received an invalid lateral acceleration sensor signal.

C0196 00

The yaw rate sensor signal is not plausible.

C0196 5A
* The yaw rate sensor offset is out of specified range.
* The yaw rate sensor signal is not plausible with the lateral acceleration sensor signal, steering angle sensor signal and vehicle speed.

C019B 5A

The yaw rate sensor signal is out of specified range.

C0287 4B

The longitudinal acceleration sensor is not calibrated.

C0287 5A

The longitudinal acceleration sensor signal is not plausible with the vehicle speed.

C0287 71

The EBCM received an invalid longitudinal acceleration sensor signal.

Action Taken When the DTC Sets

C0186 00, C0186 5A, C0186 71, C0196 00, C0196 5A, and C019B 5A
* The EBCM disables the stability control for the duration of the ignition cycle.
* The traction control/stability control-active indicator turns ON.

C0186 4B, C0287 4B, C0287 5A, and C0287 71

The EBCM disables the hill start assist for the duration of the ignition cycle.

Conditions for Clearing the DTC

* A current DTC clears when the diagnostic runs and passes.
* The EBCM will turn OFF the indicator in the next ignition cycle.

Diagnostic Aids

DTC C0186 and C0287 may set after replacing the Multi-Axis Acceleration Sensor if the sensor is not configured and setup. Perform the Multi-Axis Acceleration Sensor Module Programming and Setup (Multi-Axis Acceleration Sensor Module Programming and Setup) and the Vehicle Yaw Sensor Learn (Testing and Inspection) procedures to complete the configuration and setup.

Reference Information
Schematic Reference

Antilock Brake System Schematics (Electrical Diagrams)
Connector End View Reference

Component Connector End Views (Connector End Views By Name)
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 Testing

1. Ignition ON, verify that DTC C0800 is not set.

If DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (Diagnostic Trouble Code (DTC) List - Vehicle).

2. Verify that DTC C0186 4B, or C0287 4B is not set.

If DTC is set, perform the Vehicle Yaw Sensor Learn (Testing and Inspection) prior to this diagnostic.

3. Inspect the B119 Multi-axis Acceleration Sensor for correct installation.

If loose or incorrect installation is diagnosed, correct the installation of the component, refer to Vehicle Yaw Sensor Replacement (Service and Repair).

4. Ignition OFF, disconnect the harness connector at the B119 Multi-axis Acceleration Sensor.
5. Test for less than 5 ohm between the ground circuit terminal 6 and ground.

If greater than the specified value, 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 5 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 K17 Electronic Brake Control Module (EBCM).

7. If all circuits test normal, replace the B119 Multi-axis Acceleration Sensor and verify the DTC does not reset.

If the DTC resets, replace the K17 Electronic Brake Control Module (EBCM).

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Vehicle Yaw Sensor Replacement (Service and Repair)
* Control Module References (Programming and Relearning)for EBCM replacement, programming and setup