C0186

DTC C0186

DTC C0186 Step 1 - 10:

DTC C0186 Step 11 - 19:

Circuit Description
The Vehicle Stability Enhancement System (VSES) uses the lateral accelerometer input when calculating the desired yaw rate. The usable output voltage range for the lateral accelerometer is 0.25 - 4.75 volts.

The lateral accelerometer sensor bias compensates for sensor mounting alignment errors and electronic signal errors.

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
Voltage at the lateral accelerometer signal output to the EBCM falls outside the 0.25 - 4.75 Volt range for more than 100 milliseconds.

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

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

Diagnostic Aids
- A thorough inspection of the wiring system and connectors be performed. Failure to carefully and fully inspect the wiring system and connectors may result in misdiagnosis which may result in replacing good parts and the reappearance of the malfunction.
- Inspection for poor connections, broken insulation, or a wire that is broken inside the insulation.
- If an intermittent malfunction exists refer to Testing for Intermittent and Poor Connections.

Test Description
The numbers refer to the step numbers on the diagnostic table.
2. Tests for specified voltage on the lateral accelerometer signal circuit.
3. Tests for B+ voltage on yaw/lateral accelerometer sensor.
4. Tests the ignition circuit for a high resistance or open.
5. Checks to see if voltage was below or above specified voltage.
6. Checks to see if voltage was above specified voltage.
7. Checks to see if voltage was below specified voltage.
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 ground, a high resistance, or an open in the lateral accelerometer signal circuit.
13. Tests for a short to voltage in the lateral accelerometer signal circuit.
14. Tests for a high resistance or an open in the ground circuit.
15. Checks the yaw/lateral accelerometer sensor connector for poor connections.
16. Checks the EBCM connector for poor connections.