C0196

DTC C0196

DTC Descriptors
DTC C0196 00
- Yaw Rate Circuit No Additional Information

DTC C0196 28
- Yaw Rate Circuit Incorrect Frequency

Diagnostic Fault Information

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview





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 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 oversteer or understeer. 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 is ON.
* Ignition voltage is greater than 8 volts.

Conditions for Setting the DTC

C0196 00
* The vehicle speed has reached at least 15 km/h (9 mph) from a stop more three times during the same ignition cycle. During the time the vehicle is stationary, the yaw rate signal value is more than 7 deg/sec for 2 seconds.
* When vehicle speed is more than 25 km/h (16 mph) in a turn the difference between the yaw rate, steering angle, lateral acceleration, and wheel speed sensor values are not correlated three consecutive times.
* Yaw rate changes greater than 20 deg/sec in 6 ms four times in one second.
* The yaw/lateral combination sensor fails an internal self test.

C0196 28

The yaw frequency measured is not between 13400.0-14600.0 Hz for more than 200 msec.

Action Taken When the DTC Sets

* The EBCM turns OFF the 5-volt reference circuit, until the ignition is cycled.
* The driver information center (DIC) displays the Service Stabilitrak message.

Conditions for Clearing the DTC

* The condition for setting the DTC is no longer present and the DTC is cleared with a scan tool.
* The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

Diagnostic Aids

* If DTC C0292 is set, diagnose that DTC first.
* If the yaw and lateral accelerometer sensor is disconnected, DTCs will set and the EBCM will not provide 5 volt reference.
* The yaw rate and lateral accelerometer sensors are located in one unit and cannot be serviced separately.
* A poor ground connection for the EBCM may cause this DTC to set.

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

Circuit/System Testing

C0196 00
1. Ignition OFF, disconnect the yaw rate sensor/lateral accelerometer connector.
2. Ignition OFF, 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 lateral accelerometer signal circuit, the 5-volt reference circuit, and the low reference circuit for an open/high resistance or a short to voltage or ground.

- If all circuits test normal, replace the yaw rate sensor/lateral accelerometer, and clear the yaw rate sensor offset value in the EBCM.
- If the DTC sets again after replacing the yaw rate sensor/lateral accelerometer, replace the EBCM.

C0196 28
1. Ignition OFF, disconnect the yaw rate sensor/lateral accelerometer connector and EBCM connector.
2. Test for infinite resistance between the yaw rate frequency circuit and ground.

- If less than infinite resistance, test the yaw rate frequency circuit for a short to ground.

3. Test for less than 1 ohm of resistance on the yaw rate frequency circuit between the yaw rate sensor/lateral accelerometer connector and EBCM connector.

- If greater than 1 ohm, test the yaw rate frequency circuit for an open/high resistance.

4. Replace yaw rate sensor/lateral accelerometer, and clear the yaw rate sensor offset value in the EBCM. If C0196 28 is still current, replace the EBCM.

Repair Instructions

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

* Yaw Rate Sensor/Lateral Accelerometer Replacement
* Control Module References for EBCM replacement, setup, and programming