Diagnostic Instructions
DTC Descriptor
DTC C0292 00: VSES Combination Sensor Circuits
Circuit/System Description
The electronic brake control module (EBCM) supplies a reference voltage of 5 volts to the yaw rate sensor/lateral acceleration sensor and the steering angle sensor. The sensor supply voltage is monitored via an internal feedback circuit to the EBCM
microprocessor.
Conditions for Running the DTC
| • | Ignition voltage is greater than 8 volts. |
Conditions for Setting the DTC
The EBCM detects that the sensor supply voltage is less than 4.75 volts or greater than 5.25 volts for 1 second.
Action Taken When the DTC Sets
| • | The EBCM turns OFF the 5-volt reference circuit, until the ignition is cycled. |
| • | The EBCM disables the traction control system (TCS)/vehicle stability enhancement system (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 setting the DTC is no longer present. |
| • | The EBCM clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles. |
Diagnostic Aids
If the yaw and lateral accelerometer sensor is disconnected, DTCs will set and the EBCM will not provide 5-volt reference.
Reference Information
Schematic Reference
Antilock Brake System Schematics
Connector End View Reference
Component Connector End Views
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Testing
- Ignition ON, observe the DTC information with the scan tool.
- Ignition OFF, disconnect the yaw rate and lateral acceleration sensor connector.
- Ignition OFF for 30 seconds, test for less than 15 ohms between the low reference circuit terminal 6 and ground.
| ⇒ | If greater than 15 ohms, test the low reference circuit for an open/high resistance. If the circuits test normal, replace the EBCM. |
- Test the lateral accelerometer 12-volt ignition circuit terminal 1 for a short to voltage or ground.
| ⇒ | If all circuits test normal, replace the yaw rate sensor/lateral acceleration sensor, cycle the ignition switch and perform the yaw rate sensor recalibration procedure with the scan tool. |
| ⇒ | If the DTC sets again after replacing the yaw rate sensor/lateral acceleration sensor, replace the EBCM. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic procedure.
