Diagnostic Instructions

DTC Descriptors

DTC C0196 00: Yaw Rate Circuit Electrical failure

DTC C0196 5A: Yaw Rate Circuit Erratic

DTC C0196 3B: Yaw Rate Circuit Self Test Failure

DTC C0196 1A: Yaw Rate Circuit Offset Failure

Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Yaw Rate Supply Voltage	C0196 00	C0196 00	--	--
Yaw Rate CAN Bus High	C0196 00	C0196 00	C0196 00	C0196 5A, 3B, 1A
Yaw Rate CAN Bus Low	C0196 00	C0196 00	C0196 00	C0196 5A, 3B, 1A
Yaw Rate Ground	--	C0196 00	--	--

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 Yaw/Lateral sensor communicates to the EBCM on a dedicated CAN bus. 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 over-steer or under-steer. 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.

Conditions for Running the DTC

Conditions for Setting the DTC

Action Taken When the DTC Sets

One or more of the following actions may occur:

Conditions for Clearing the DTC

Diagnostic Aids

Possible causes of this DTC are as follows:

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Antilock Brake System Connector End Views

Electrical Information Reference

Scan Tool Reference

Scan Tool Data List for EBCM

Circuit/System Verification

With scan tool installed, clear the DTCs then drive the vehicle in a straight line at a speed greater than 20 km/h (13 mph). If the DTC did not set as a current DTC see Diagnostic Aids.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the yaw/lat sensor.
2. Ignition OFF for 60 seconds, test for less than 5 ohms between the low reference circuit terminal 5 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 B+ between the ignition voltage circuit terminal 3 and ground.

⇒	If not within the specified range, test the ignition voltage circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the EBCM.

4. Ignition OFF, disconnect the harness connector at the EBCM.
5. Ignition ON, test for less than 1 volt between the following terminal listed below and ground.

•	CAN Bus High serial data circuit terminal 18

•	CAN Bus Low serial data circuit terminal 19

⇒	If greater than the specified value, test the appropriate serial data circuit for a short to voltage. If the circuit tests normal, test or replace the vehicle yaw sensor.

6. Ignition OFF, test for infinite resistance between the following terminal listed below and ground.

•	CAN Bus High serial data circuit terminal 18

•	CAN Bus Low serial data circuit terminal 19

⇒	If not the specified value, test the appropriate serial data circuit for a short to ground. If the circuit tests normal, test or replace the vehicle yaw sensor.

7. Test for less than 2 ohms between the appropriate serial data circuit terminals listed below.

•	CAN Bus High serial data circuit terminal 18 at the EBCM harness connector and terminal 2 at the yaw/lat sensor harness connector.

•	CAN Bus Low serial data circuit terminal 19 at the EBCM harness connector and terminal 1 at the yaw/lat sensor harness connector.

⇒	If greater than the specified range, test the appropriate serial data circuit for an open/high resistance. If the circuit tests normal, test or replace the vehicle yaw sensor.

8. Test for infinite resistance between the CAN Bus High serial data circuit terminal 18 and the CAN Bus Low serial data circuit terminal 19.

⇒	If not the specified value, repair the serial data circuits for a short to each other.

9. If all circuits test normal, replace the EBCM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.