C0196

DTC C0196
Circuit Description
The electronic brake control module (EBCM) uses the yaw rate signal to determine the directional angle of the vehicle during a turn or a skid. The EBCM uses the signal from the yaw rate as one of the inputs to operate the vehicle stability enhancement system (VSES).

DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC C0196 Yaw Rate Circuit

Conditions for Running the DTC
The ignition voltage is greater than 8 volts.

Conditions for Setting the DTC
The EBCM will set the DTC when one or more of the following conditions have occurred:
^ The yaw rate signal is less than 0.18 volt or greater than 4.84 volts.
^ The yaw rate signal changes to rapidly based on vehicle dynamics.
^ The internal calibration in the yaw rate is out of range.
^ The yaw and lateral acceleration sensor has failed and internal self check test.

Action Taken When the DTC Sets
If equipped, the following actions will occur:
^ The EBCM disables VSES for the duration of the ignition cycle.
^ The driver information center (DIC) displays the Service Stability System message.

Conditions for Clearing the DTC
^ The condition for 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
The lateral accelerometer is packaged with the yaw rate sensor as a single component.

Test Description
The numbers below refer to the step numbers on the diagnostic table.
2. Tests for the proper voltage output on the 5-volt reference circuit and the proper operation of the signal circuit.
3. Tests for possible low 5-volt reference output or a problem with the signal circuit.
4. Tests for a short to voltage on the 5-volt reference circuit. If a short to voltage exists, other DTC's may be set for the vehicle stability system.
8. Tests for a problem with the low reference circuit. If a short to voltage exists, other DTC's may be set for the vehicle stability system.

Step 1 - Step 10:

Step 11 - Step 12: