C1211

DTC C1211





Circuit Description
The instrument cluster controls the operation of the ABS indicator. The EBCM reports the desired status of the ABS indicator via serial data messages. The ABS indicator signal circuit is a back-up reporting circuit to the serial data messages. The EBCM supplies ground through the circuit when the ABS is operating properly. When there is a problem with ABS that should turn on the ABS indicator, the EBCM opens the ABS indicator signal circuit. If there is a problem with the ABS serial data messages, the instrument cluster uses the ABS indicator signal to determine if the ABS indicator should be illuminated. Using the serial data messages and back-up circuit, the instrument cluster decides whether to turn on the ABS indicator.

Conditions for Running the DTC
The ignition is ON.

Conditions for Setting the DTC
One of the following conditions exists for 2 seconds:
^ An open - the ABS indicator signal circuit resistance is greater than 5 k*. The condition is detected when the ABS indicator is commanded ON.
^ A short to ground - the ABS indicator signal circuit voltage is less than 1.7 volts. The condition is detected when the ABS indicator is commanded ON.
^ A short to voltage - the ABS indicator signal circuit voltage is greater than 4.5 volts. The condition is detected when the ABS indicator is commanded OFF.

Action Taken When the DTC Sets
^ The ABS remains functional.
^ The ABS indicator remains OFF.

Conditions for Clearing the DTC
^ The condition for the DTC is no longer present (the DTC is not current) and you used the scan tool Clear DTC function.
^ The condition for the DTC is no longer present (the DTC is not current) and you used the On-Board Diagnostics Clear DTC function.
^ The EBCM automatically clears the history DTC when a current DTC is not detected in 50 consecutive drive cycles.

Test Description
The numbers below refer to the step numbers on the diagnostic table.
2. Uses the scan tool in order to verify the normal state of the ABS indicator signal circuit.
3. Ensures that the instrument cluster can operate the ABS indicator.