C0196

DTC C0196

DTC C0196 Step 1 - 10:

DTC C0196 Step 11 - 19:

Circuit Description
The Vehicle Stability Enhancement System (VSES) is activated by the 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.

To correct for oversteer, differential braking is used on the left front or right front wheel brake. To correct for understeer, differential braking is used on the left rear or right rear wheel brake.

Conditions for Running the DTC
- The ignition is ON.
- The vehicle speed is greater than 40 km/h (25 mph).

Conditions for Setting the DTC
The EBCM performs different tests to detect a DTC condition. A malfunction is detected when the yaw rate sensor signal input voltage is less than 0.225 volts or greater than 4.775 volts for more than 100 milliseconds.

Action Taken When the DTC Sets
If equipped, the following actions occur:
- The EBCM disables the TCS/VSES for the duration of the ignition cycle.
- A malfunction DTC is set.
- The ABS indicator turns ON.
- The Stability Off indicator turns ON.

Conditions for Clearing the DTC
- Using a scan tool
- The DTC will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present.

Diagnostic Aids
The following conditions may cause a malfunction:
- Open in the yaw rate signal circuit
- Short to ground in the yaw rate signal circuit
- Short to voltage in the yaw rate signal circuit
- Open in the yaw rate ground circuit
- Open in ignition voltage circuit
- Malfunctioning vehicle yaw/lateral accelerometer sensor
- Malfunctioning EBCM

Test Description
The numbers refer to the step numbers on the diagnostic table.
2. Tests for specified voltage on the yaw rate signal circuit.
3. Checks the voltage between the ignition and ground circuit for a specified value.
4. Checks the voltage between the ignition and ground circuit for a specified value.
5. Checks to see if voltage was above specified voltage.
6. Checks to see if voltage was below specified voltage.
7. Checks to see if EBCM 5 volt reference signal is within specified limit.
8. Checks to see if voltage was above specified voltage.
9. Checks to see if resistance of ground circuit is less than 5 ohms.
10. Tests for a short to voltage on the 5 volt reference circuit.
11. Tests for a short to ground, a high resistance, or an open in the 5 volt reference circuit.
12. Tests for a short to voltage in the yaw rate signal circuit.
13. Tests for a short to ground, a high resistance, or an open in the yaw rate signal circuit.
14. Tests for a high resistance or an open in the ground circuit.
15. Checks the EBCM connector for poor connections.
16. Checks the yaw/lateral accelerometer sensor connector for poor connections.