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
DTC C0196 1A: Yaw Rate Circuit Bias Level Out of Range
DTC C0196 3B: Yaw Rate Circuit Internal Self Test Failed
DTC C0196 5A: Yaw Rate Circuit Plausibility Failure

### Diagnostic Fault Information

Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance
--- | --- | --- | --- | ---
Ignition Voltage | C0196 00 | C0196 00 | C0196 00 | --
Low Reference | C0196 00 | C0196 00 | C0196 00 | C0196 5A, C0196 3B, C0196 1A
CAN Bus High Serial Data | C0196 00 | C0196 00 | C0196 00 | C0196 5A, C0196 3B, C0196 1A
CAN Bus Low Serial Data | C0196 00 | C0196 00 | C0196 00 | C0196 5A, C0196 3B, C0196 1A

### Circuit/System Description

The yaw rate and the lateral accelerometer sensors are combined into one sensor, external to the electronic brake control module (EBCM). The vehicle stability enhancement system (VSES) uses the lateral accelerometer input when calculating the desired yaw rate. The yaw rate/lat sensor communicates with the EBCM via discrete CAN Bus High and CAN Bus Low serial data circuits.

### Conditions for Running the DTC

Ignition ON

### 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

• | The EBCM disables the VSES for the duration of the ignition cycle.

• | A DIC message and/or a warning indicator may be displayed.

### Conditions for Clearing the DTC

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

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

### Reference Information

#### Schematic Reference

Antilock Brake System Schematics

#### Connector End View Reference

Component Connector End Views

#### Description and Operation

ABS Description and Operation

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Scan Tool Reference

Control Module References for scan tool information

### Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the yaw rate/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.

3. Ignition ON, test for between the 12 volt reference 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.

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.

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.

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.

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 together.

9. If all circuits test normal, replace the yaw rate/lat sensor. If the DTC resets, replace the EBCM.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for EBCM replacement, setup, and programming