C1236

DTC C1236





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

Conditions for Running the DTC
^ The vehicle speed is greater than 8 km/h (5 mph)
^ The ignition voltage is less than 10.8 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 inactive, the system voltage is less than 10.8 volts.
^ During the system operation, the system voltage is less than 9.36 volts

Action Taken When the DTC Sets
If equipped, the following actions occur:
^ The EBCM disables the ABS for the duration of the ignition cycle
^ The EBCM disables the TCS (w/NW9) for the duration of the ignition cycle.
^ The DRP does not function optimally, or with ignition voltage less than 8.5 volts, the EBCM disables the DRP for the duration of the ignition cycle
^ The ABS indicator turns ON.
^ The Traction OH indicator turns ON.

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

Diagnostic Aids
^ Test the charging system. Refer to Diagnostic System Check - Engine Electrical.
^ 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. Use the scan tool in order to inspect the voltage to the EBCM
3. Use the scan tool in order to inspect the voltage to the body control module. A low voltage value in multiple modules indicates a concern in the charging system.
5. Verifies that the condition is still present.