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
DTC C0186 5A
- Lateral Acceleration Sensor Signal Not Plausible
DTC C0186 71
- Lateral Acceleration Sensor Signal Invalid Data
DTC C018B 5A
- Lateral Acceleration Sensor Signal Not Plausible
DTC C0196 00
- Yaw Rate Sensor Circuit
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
Diagnostic Fault Information
Circuit/System Description
The yaw rate and lateral acceleration sensors are combined into one multi-axis acceleration sensor module, external to the electronic brake control module. The electronic brake control module supplies ignition voltage to the multi-axis acceleration sensor module. The multi-axis acceleration sensor module communicates with the electronic brake control module via serial data. The module activates the stability control function depending on multi-axis acceleration sensor module input.
Conditions for Running the DTC
* Vehicle speed is greater than 50 km/h (31 MPH) while driving straight ahead.
* Vehicle speed is greater than 50 km/h (31 MPH) while traveling around a curve at a minimum of 10 degrees/s yaw rate.
Conditions for Setting the DTC
C0186 00
* The lateral acceleration sensor signal is out of specified range for 1.6 seconds.
* The lateral acceleration sensor signal offset is out of specified range for 0.4 seconds.
C0186 5A
The lateral acceleration signal is not plausible with the yaw rate signal, the steering angle signal and vehicle speed for 1.6 seconds.
C0186 71
The electronic brake control module has received invalid serial data from the multi-axis acceleration sensor module.
C018B 5A
The lateral acceleration sensor signal is out of the specified range.
C0196 00
* The yaw rate signal is out of the specified range for 10 seconds.
* The yaw rate signal offset is out of the specified range for 1.6 seconds.
C0196 5A
* The yaw rate signal is out of the specified range for 0.5-5 seconds.
* The yaw rate signal is not plausible with the lateral acceleration signal, the steering angle sensor signal and vehicle speed for 1.6 seconds.
C0196 71
The electronic brake control module has received invalid serial data from the yaw rate.
C019B 5A
The yaw rate sensor signal is out of the specified range.
C0287 4B
The longitudinal acceleration sensor calibration has not been learned.
C0287 5A
* An Internal fault in multi-axis acceleration sensor will set this DTC.
* Improperly mounted or loose multi-axis acceleration sensor may set this DTC.
* The longitudinal acceleration signal is not plausible with the vehicle acceleration.
Action Taken When the DTC Sets
* The stability control indicator turns ON.
* The stability control Off indicator turns ON.
* The traction control Off indicator turns ON.
* The electronic brake control module disables the 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.
Diagnostic Aids
* Internal failure in the yaw and lateral accelerometer sensor.
* Improperly mounted or loose multi-axis acceleration sensor.
* Check for electrical magnetic interference with the multi-axis acceleration sensor harness.
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 (Without F55) ABS Description and Operation (Without F55)ABS Description and Operation (With F55) ABS Description and Operation (With F55)
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 DTC U0125, U0126, or C0710 is not set.
• If any of the DTCs are set
Refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle.
• If none of the DTCs are set
3. Verify that DTC C0186 5A, C018B 5A, C0196 5A, C019B 5A, C0287 4B, or C0287 5A is not set.
• If any of the DTCs are set
Perform the Vehicle Yaw Sensor Learn Testing and Inspection.
• If none of the DTCs are set
4. Verify the B119 Multi-axis acceleration sensor is installed correctly.
• If loose or incorrect installation
Correct the installation of the component.
• If installed correctly
5. 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.
6. Test for less than 5 ohms between the ground circuit terminal 6 and ground.
• If 5 ohms or greater
1. Ignition OFF.
2. Test for less than 2 ohms in the ground circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, repair the open/high resistance in the ground connection.
• If less than 5 ohms
7. Ignition ON.
8. Verify a test lamp illuminates between the ignition 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 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 ohms in the ignition circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the K17 Electronic brake control module.
• If the test lamp illuminates
9. Replace the B119 Multi-axis acceleration sensor.
10. Verify the DTC does not set while operating the vehicle within the Conditions for Running the DTC.
• If the DTC sets
Replace the K17 Electronic brake control module.
• If the DTC does not set
11. 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