C0196

DTC C0196

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* 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
- Lateral Accelerometer Circuit

DTC C0196 28
- Lateral Accelerometer Circuit Bias Level Out Of Range




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 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 yaw motion by applying differential braking to the wheels.


Conditions for Running the DTC


C0196 00
* The ignition voltage is greater than 9.6 volts.
* The vehicle is stopped or the vehicle speed is greater than 45 km/h (28 mph).



Conditions for Setting the DTC

C0196 00

One of the following conditions exist:

* The yaw/lateral combination sensor signal output voltage to the EBCM is less than 0.15 volt or greater than 4.85 volts.
* 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 EBCM disables the VSES for the duration of the ignition cycle.
* The driver information center (DIC) displays the Service Stabilitrak message.
* The ABS/TCS remains functional.



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

* 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.



Reference Information
Schematic Reference

Antilock Brake System Schematics ([1][2]Antilock Brakes / Traction Control Systems)
Connector End View Reference

Component Connector End Views
Description and Operation

ABS Description and Operation (Description and Operation)
Electrical Information Reference

* Circuit Testing
* Connector Repairs
* Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information


Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the yaw/lat sensor.
2. Test for less than 5 ohms between the low reference circuit terminal D and ground.

• If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the EBCM.

3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal B and ground.

• If less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the EBCM.


• If greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the EBCM.

4. Verify the scan tool Yaw sensor parameter is less than 0 volts.

• If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the EBCM.

5. Install a 3A fused jumper wire between the signal circuit terminal E and the 5-volt reference circuit terminal B. Verify the scan tool Yaw sensor is greater than 4.8 volts.

• If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the EBCM.

6. If all circuits test normal, test or replace the yaw/lat sensor.



Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

* Vehicle Yaw Sensor with Vehicle Lateral Accelerometer Replacement (Service and Repair)
* Control Module References for EBCM replacement, setup, and programming