With RPO JL4

DTC C0290 or C0292 (W/JL4)
Circuit Description
The EBCM supplies a reference voltage of 5 volts to the yaw rate sensor/lateral accelerometer and the master cylinder pressure sensor. The sensor supply voltage is monitored via an internal feedback circuit to the EBCM microprocessor.

DTC Descriptors
This diagnostic procedure supports the following DTC's:
^ DTC C0290 Class 2 Data Link Malfunction
^ DTC C0292 Lost Communications with Engine Control System

Conditions for Running the DTC
The ignition is ON.

Conditions for Setting the DTC
The electronic brake control module (EBCM) detects that the sensor supply voltage is less than 4.75 volts or greater than 5.25 volts for 30 milliseconds.

Action Taken When the DTC Sets
^ The EBCM disables the vehicle stability enhancement system (VSES).
^ The message center displays the service stability system message.

Conditions for Clearing the DTC
The conditions for setting the DTC are no longer present and you use the scan tool Clear DTC's function.

Diagnostic Aids
Thoroughly inspect connections or circuitry that may cause an intermittent malfunction. Refer to Testing for Electrical Intermittents, Testing for Intermittent Conditions and Poor Connections, Wiring Repairs and Connector Repairs. Component Tests and General Diagnostics

Test Description
The numbers below refer to the step numbers on the diagnostic table.
5. This step tests for a shorted yaw rate sensor/lateral accelerometer.
6. This step tests for a shorted master cylinder pressure sensor. The presence of DTC C0110 is normal during this step.

Step 1 - Step 8:

Step 9 - Step 10: