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 failureDTC 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
| • | 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
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
- Ignition OFF, disconnect the harness connector at the yaw/lat sensor.
- Ignition OFF for 60 seconds, test for less than 5 ohms between the low reference circuit terminal 5 and ground.
- Ignition ON, test for B+ between the ignition voltage circuit terminal 3 and ground.
- Ignition OFF, disconnect the harness connector at the EBCM.
- Ignition ON, test for less than 1 volt between the following terminal listed below and ground.
- Ignition OFF, test for infinite resistance between the following terminal listed below and ground.
- Test for less than 2 ohms between the appropriate serial data circuit terminals listed below.
- 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 all circuits test normal, replace the EBCM.
| ⇒ | If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the EBCM. |
| ⇒ | 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. |
| • | 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. |
| • | 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. |
| • | 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. |
| ⇒ | If not the specified value, repair the serial data circuits for a short to each other. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for EBCM |
