C0196
DTC C0196
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* Review Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptors
DTC C0196 00
Yaw Rate Circuit Electrical failure
DTC C0196 5A
Yaw Rate Circuit Erratic
DTC C0196 3B
Yaw Rate Circuit Self Test Failure
DTC C0196 1A
Yaw Rate Circuit Offset Failure
Diagnostic Fault Information
Circuit/System Description
The vehicle stability enhancement system (VSES) is activated by the electronic brake control module (EBCM) calculating the desired yaw rate and comparing it to the actual yaw rate input. The Yaw/Lateral sensor communicates to the EBCM on a dedicated CAN bus. The desired yaw rate is calculated from measured steering wheel position, vehicle speed, and lateral acceleration. The difference between the desired yaw rate and actual yaw rate is the yaw rate error, which is a measurement of over-steer or under-steer. If the yaw rate error becomes too large, the EBCM will attempt to correct the vehicle's yaw motion by applying differential braking to the wheels.
Conditions for Running the DTC
* The ignition switch is in the ON position.
* The ignition voltage is greater than 9.5 volts.
Conditions for Setting the DTC
* The yaw/lateral combination sensor reports an internal failure.
* The yaw/lateral combination sensor learns a wrong offset value
* Incorrectly mounted yaw/lateral sensor.
Action Taken When the DTC Sets
One or more of the following actions may occur:
* Vehicle Stability Enhancement System (VSES) are disabled.
* The VSES indicator turns ON.
* The driver information center (DIC) displays the Service ESC message.
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 100 consecutive drive cycles.
Diagnostic Aids
* Possible causes of this DTC are as follows:
* Inspect the mounting of the Yaw sensor to ensure proper orientation and installation of the sensor.
* On a level surface, read the Yaw sensor offset value to ensure a value within the proper range.
Reference Information
Schematic Reference
Antilock Brake System Schematics
Connector End View Reference
Antilock Brake System Connector End Views
Electrical Information Reference
* Circuit Testing
* Connector Repairs
* Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs
Scan Tool Reference
Scan Tool Data List for EBCM
Circuit/System Verification
With scan tool installed, clear the DTCs then drive the vehicle in a straight line at a speed greater than 20 km/h (13 mph). If the DTC did not set as a current DTC see Diagnostic Aids.
Circuit/System Testing
1. Ignition OFF, disconnect the yaw rate sensor/lateral accelerometer connector.
2. Test for less than 1 ohm of resistance between the low reference circuit and ground.
^ If greater than 1 ohm, test the low reference circuit and the EBCM ground circuit for a short to voltage or an open/high resistance. If the circuits test normal, replace the EBCM.
3. Test the yaw rate/lateral sensor 5 volt reference circuit for a short to voltage, short to ground, an open or high resistance.
^ If the 5 volt reference circuit did not test normal, repair the circuit.
4. Test the yaw/lateral sensor CAN HI and LO circuit for a short to voltage, short to ground, an open or high resistance.
^ If the yaw rate/lateral CAN HI and LO circuits did not test normal repair the circuit.
^ If all the circuits test normal, replace the yaw/lateral sensor.
5. Perform the Diagnostic Test Drive.
^ If the DTC set as a current DTC, replace the EBCM.
^ If the DTC did not set as a current DTC, see Diagnostic Aids.
Repair Instructions
Important: Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests
* Steering Angle Sensor Centering
* Diagnostic Test Drive
* Refer To Programing and Relearning Programming and Relearning