C0196
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 Instructionsprovides an overview of each diagnostic category.
DTC Descriptors
DTC C0186 00
- Lateral Accelerometer Circuit
DTC C0186 09
- Lateral Accelerometer Circuit Rate of Change Above Threshold
DTC C0186 0F
- Lateral Accelerometer Circuit Erratic
DTC C0186 55
- Lateral Accelerometer Circuit Expected Number of Events Not Reached
DTC C0186 1A
- Lateral Accelerometer Circuit Bias Level Out Of Range
DTC C0186 5A
- Lateral Accelerometer Circuit Plausibility Failure
DTC C0186 3B
- Lateral Accelerometer Circuit Erratic Internal Self Test Failed
DTC C0186 75
- Lateral Accelerometer Circuit Signal Above Allowable Range
DTC C0196 00
- Yaw Rate Circuit
DTC C0196 09
- Yaw Rate Circuit Rate of Change Above Threshold
DTC C0196 0F
- Yaw Rate Circuit Erratic
DTC C0196 28
- Yaw Rate Circuit Incorrect Frequency
DTC C0196 55
- Yaw Rate Circuit Expected Number of Events Not Reached
DTC C0196 1A
- Yaw Rate Circuit Bias Level Out Of Range
DTC C0196 5A
- Yaw Rate Circuit Plausibility Failure
DTC C0196 3B
- Yaw Rate Sensor Internal Self Test Failed
DTC C0196 75
- Yaw Rate Circuit Signal Above Allowable Range
DTC C0287 0F
- Longitudinal Circuit Signal Erratic
DTC C0287 3B
- Longitudinal Circuit Signal Internal Self Test Failed
DTC C0287 55
- Longitudinal Circuit Signal Expected Number of Events Not Reached
DTC C0287 5A
- Longitudinal Circuit Signal Plausibility Failure
Diagnostic Fault Information
Circuit/System Description
The yaw rate, lateral acceleration and longitudinal acceleration sensors are combined into one yaw/lateral accelerometer sensor, external to the electronic brake control module (EBCM). The EBCM supplies ignition voltage to the yaw/lateral accelerometer sensor. The yaw/lateral acceleration sensor communicates with the EBCM via serial data. The module activates the stability control function depending on yaw/lateral accelerometer sensor input.
Conditions for Running the DTC
Ignition ON.
DTC C0561 71 is not set as a result of a lateral acceleration sensor circuit or internal fault during the current ignition cycle.
Conditions for Setting the DTC
C0186 00, C0186 3B, C0196 00, or C0196 3B
The yaw/lateral accelerometer combination sensor fails an internal self test.
C0186 09
The lateral accelerometer combination changes by more than 550 meters/second per second.
C0186 0F or C0196 0F
The yaw/lateral accelerometer combination sensor is not mounted properly.
C0186 55
The lateral accelerometer combination signal does not change and is locked on a constant value.
C0186 1A
The lateral accelerometer combination bias exceeds 3 meters/second.
C0186 5A
The lateral acceleration sensor signal is not plausible with the yaw rate sensor signal, steering angle sensor signal and vehicle speed.
C0186 75
The lateral accelerometer combination signal above allowable range.
C0196 09
The yaw rate combination sensor changes by more than 455 degrees/second per second.
C0196 28
The yaw frequency is out of specification.
C0196 39
The yaw rate combination sensor has an internal electronic failure.
C0196 1A
The yaw rate combination bias exceeds 5.7 degrees/second.
C0196 5A
The yaw rate sensor signal is not plausible with the lateral acceleration sensor signal, steering angle sensor signal and vehicle speed.
C0196 55
The yaw rate combination signal does not change and is locked on a constant value.
C0196 75
The yaw rate combination signal above allowable range.
C0287 0F
The longitudinal combination sensor signal is momentarily implausible or discontinuous.
C0287 55
The longitudinal combination sensor detects fewer than the expected number of transitions.
C0287 3B
The longitudinal combination sensor fails an internal test.
C0287 5A
The longitudinal combination sensor fails two or more input parameters for plausibility.
Action Taken When the DTC Sets
One or more of the following actions may occur:
* The vehicle stability enhancement system and traction control system is disabled.
* A driver information center message and/or a warning indicator may be displayed.
Conditions for Clearing the DTC
* The condition for the DTC is no longer present.
* The EBCM automatically clears the history DTC when a current DTC is not detected in 40 consecutive drive cycles.
Reference Information
Schematic Reference
Antilock Brake System Schematics [1][2]Antilock Brakes / Traction Control Systems
Connector End View Reference
Component Connector End Views Connector Views
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 Referencesfor scan tool information
Circuit/System Verification
Ignition ON, observe the scan tool yaw rate and longitudinal/lateral accelerometer sensor parameter. The reading should be the same on all sensors when driving in a straight line at a constant speed greater than 20 km/h (13 mph), and will vary as the vehicle changes direction.
Circuit/System Testing
1. Verify that DTC U0125, U0126 is not set.
• If DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle.
2. Ignition OFF, disconnect the harness connector at the yaw/lateral accelerometer sensor.
3. Verify the yaw/lateral accelerometer sensor is mounted properly.
• If not mounted properly, refer to Vehicle Yaw Sensor with Vehicle Lateral Accelerometer Replacement Service and Repair.
4. 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 ohm between the ground circuit terminal 6 and ground.
• If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuits test normal, replace the EBCM.
5. Ignition ON, test for greater than 11 V between the ignition voltage circuit terminal 5 and ground.
• If not within the specified range, test the ignition voltage circuit for a short to ground or open/high resistance. If the circuits test normal, replace the EBCM.
6. If all circuits test normal, replace the yaw/lateral accelerometer sensor.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Vehicle Yaw Sensor with Vehicle Lateral Accelerometer Replacement Service and Repair
* Control Module References Control Module Referencesfor EBCM replacement, programming and setup