C1236

Circuit Description
The EBCM monitors the system voltage level available for system operation. A low voltage condition prevents the system from operating properly.

Conditions for Running the DTC
^ The vehicle speed is greater than 8km/h (5 mph).
^ The ignition voltage is less than 10.5 volts.
^ The system relay is commanded ON.

Conditions for Setting the DTC
One of the following conditions exists for 0.72 seconds:
^ During initialization or when the system is not in ABS/TCS/VSES, the system voltage is less than 10.5 volts.
^ When the system is in ABS/TCS/VSES, the system voltage is less than 9.0 volts.

Action Taken When the DTC Sets
If equipped, the following actions occur:
^ The EBCM disables the ABS/TCS/VSES for the duration of the ignition cycle.
^ The ABS indicator turns ON.
^ The TRACTION OFF indicator turns ON.
^ The DIC displays the SERVICE STABILITY SYSTEM message.
^ The DRP does not function optimally, or with ignition voltage less than 8.5 volts, the EBCM disables the DRP.
^ When the EBCM disables the DRP, the following actions also occur:
- DTC C1248 sets.
- The red BRAKE warning indicator turns ON.

Conditions for Clearing the DTC
^ The condition for the DTC is no longer present (the DTC is not current) and you used the scan too[ Clear DTC function.
^ The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

Diagnostic Aids
Test the charging system. Refer to A Diagnostic System Check - Starting and Charging. Possible causes of this DTC are the following conditions:
^ A charging system malfunction
^ An excessive battery draw
^ A weak battery
^ A faulty system ground

Test Description
The numbers below refer to the step numbers on the diagnostic table.
2. This step uses the scan too[ to inspect the system voltage to the EBCM.
3. This step measures the battery positive voltage circuit.
4. This step tests the module ground circuit.