C0210

DTC C0209-C0212





Test 1-8





Test 9-14

Circuit Description
The Vehicle Stability Enhancement System (VSES) is activated when the EBCM determines that the desired yaw rate does not match the actual yaw rate. The desired yaw rate is calculated from the measured steering wheel position, vehicle speed, and lateral acceleration.
The usable output voltage range is 0.15 - 4.85 volts for the following sensors:
^ The yaw rate sensor
^ The longitudinal accelerometer

The usable output voltage range is 0.4 - 4.6 volts for the lateral accelerometer. With no sensor bias present, a 2.5 volt signal from these sensors is interpreted by the EBCM respectively as follows:
^ Zero yaw rate
^ Zero lateral acceleration
^ Zero longitudinal acceleration

The sensor bias compensates, during VSES initialization, for sensor mounting alignment errors, electronic signal errors, temperature changes, and manufacturing differences.

Conditions for Running the DTC
C0209 and C0210
The ignition is ON.

C0211
The vehicle is driven straight forward at a speed greater than 19 km/h (12 mph) for more than 20 seconds.

C0212
The vehicle is driven straight forward at a speed greater than 19 km/h (12 mph) for at least 10 seconds prior to making a stable turning maneuver.

Conditions for Setting the DTC
C0209
The yaw rate sensor signal is less than 0.15 volts or greater than 4.85 volts for 20 milliseconds.

C0210
The yaw rate sensor signal indicates a sudden change in yaw rate which exceeds a physical limitation.

C0211
The yaw rate sensor signal indicates the yaw rate sensor bias voltage is out of normal operating range.

C0212
The yaw rate sensor signal indicates a change in yaw rate which does not correlate with the signals from other sensors.

Action Taken When the DTC Sets
^ The EBCM disables the VSES.
^ The message center displays the SERVICE STABILITY SYSTEM message.

Conditions for Clearing the DTC
The conditions for setting the DTC are no longer present and you use the scan tool Clear DTCs function.

Diagnostic Aids
^ Inspect the vehicle for proper wheel alignment. Ensure the vehicle does not pull toward the left or right while driving straight forward on a level surface.
^ Communicate with the customer to determine the conditions under which the message center displays the Service Stability System message. Learning the conditions under which the DTC sets may help you duplicate the failure.
^ Use the Snapshot function on the scan tool in order to assist you in locating an intermittent malfunction.

Test Description
The numbers below refer to the step numbers on the diagnostic table.
3. This step tests the sensor circuitry in the high voltage range.
4. This step tests the sensor circuitry in the low voltage range. If the fuse in the jumper opens when you perform this test, the signal circuit is shorted to voltage.
5. This step tests the 5-volt reference circuit of the yaw rate sensor/lateral accelerometer.