For 1990-2009 cars

### Diagnostic Instructions

• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

• | Review Strategy Based Diagnosis for an overview of the diagnostic approach.

• | Diagnostic Procedure Instructions provides an overview of each diagnostic category.

### 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 Circuit | C0196 00 | C0196 00 | C0196 00 | --
Yaw Rate CAN Bus High Circuit | C0196 00 | C0196 00 | C0196 00 | C0196 5A, 3B, 1A
Yaw Rate CAN Bus Low Circuit | C0196 00 | C0196 00 | C0196 00 | C0196 5A, 3B, 1A
Yaw Rate Ground Circuit | -- | 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

• | The ignition switch is in the ON position.

• | The ignition voltage is greater than 9.5 volts.

### Conditions for Setting the DTC

• | The yaw/lateral combination sensor reports an internal failure.

• | The yaw/lateral combination sensor learns a wrong offset value.

• | Incorrectly mounted yaw/lateral sensor.

### Action Taken When the DTC Sets

One or more of the following actions may occur:

• | Vehicle Stability Enhancement System (VSES) are disabled.

• | The VSES indicator turns ON.

• | The driver information center (DIC) displays the Service ESC message.

### Conditions for Clearing the DTC

• | The condition for the DTC is no longer present.

• | The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

### Diagnostic Aids

Possible causes of this DTC are as follows:

• | Inspect the mounting of the Yaw sensor to ensure proper orientation and installation of the sensor.

• | On a level surface, read the Yaw sensor offset value to ensure a value within the proper range.

### Reference Information

#### Schematic Reference

Antilock Brake System Schematics

#### Connector End View Reference

Antilock Brake System Connector End Views

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### 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 yaw rate/lateral accelerometer connector.
2. Test the yaw rate/lateral sensor reference voltage circuit for a short to voltage, short to ground, an open or high resistance.

⇒ | If the reference voltage circuit did not test normal, repair the circuit.

3. Test the yaw/lateral sensor ground circuit for an open or high resistance.

⇒ | If the reference ground circuit did not test normal, repair the circuit.

4. Test the yaw/lateral sensor CAN HI and LO circuit for a short to voltage, short to ground, an open or high resistance.

⇒ | If the yaw rate/lateral CAN HI and LO circuits did not test normal repair the circuit.

5. Ignition ON, test the yaw rate/lateral sensor reference voltage circuit for 5 volts, and the ground circuit for an open or high resistance.

⇒ | If the yaw rate/lateral 5-volt reference and ground circuits test normal replace the yaw/lateral sensor.

⇒ | If the yaw rate/lateral 5-volt reference and ground circuits did not test normal replace the EBCM.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

• | Electronic Brake Control Module Replacement

• | Control Module References for EBCM replacement, setup, and programming