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 | C0196 00 | -- |
Yaw Rate CAN Bus High | C0196 00 | C0196 00 | C0196 00 | C0196 5A, C0196 3B, C0196 1A |
Yaw Rate CAN Bus Low | C0196 00 | C0196 00 | C0196 00 | C0196 5A, C0196 3B, C0196 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. |
| • | A DIC message and/or a warning message may be displayed. |
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
Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
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 Rate/Lateral Accelerometer.
- Test for less than 6 ohms between the low reference circuit terminal 5 and ground.
- Ignition ON, test for 11.8-12.2 volts between the 12-volt reference circuit terminal 3 and ground.
- Ignition OFF, disconnect the harness connector at the Steering Angle sensor.
- Ignition ON, test for 0 volts between the communication circuit terminal 5 and ground.
- Test for 0 volts between the communication circuit terminal 2 and ground.
- Ignition OFF, test for infinite resistance between the communication circuit terminal 5 and ground.
- Test for infinite resistance between the communication circuit terminal 2 and ground.
- Test for less than 1 ohm between the communication circuit terminal 1 and terminal 5.
- Test for less than 1 ohm between the communication circuit terminal 2 and terminal 2.
- Test for infinite resistance between the communication circuit 5 and the communication circuit 2.
- If all circuits test normal, replace the Yaw Rate/Lateral sensor.
| ⇒ | If greater than the specified range, test for an open/high resistance in the low reference circuit. If the circuit tests normal, replace the EBCM. |
| ⇒ | If less than the specified range, test the 12-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the EBCM. |
| ⇒ | If greater than the specified range, test the 12-volt reference circuit for a short to voltage. If the circuit tests normal, replace the EBCM. |
| ⇒ | If greater than the specified value, test the communication circuit for a short to voltage. |
| ⇒ | If greater than the specified value, test the communication circuit for a short to voltage. |
| ⇒ | If not the specified value, test the communication circuit for a short to ground. |
| ⇒ | If not the specified value, test the communication circuit for a short to ground. |
| ⇒ | If greater than the specified range, test the communication circuit for an open/high resistance. |
| ⇒ | If greater than the specified range, test the communication circuit for an open/high resistance. |
| ⇒ | If not the specified value, test the communication circuits for a short together. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for EBCM replacement, setup, and programming |
