C0901

CIRCUIT DESCRIPTION
This circuit monitors the voltage level available to the Accelerator and Servo Control Module (ASM). If the voltage drops below 7.5 volts, full performance of the Traction Control System (TCS) cannot be guaranteed.

CONDITIONS FOR SETTING THE DTC
Diagnostic Trouble Code (DTC) C0901 can set anytime the ignition is in the RUN position and ignition voltage is less than 7.5 volts.

ACTION TAKEN WHEN THE DTC SETS
^ The Traction Control System (TCS) is disabled.
^ The traction control indicator is turned on.

CONDITIONS FOR CLEARING THE DTC
^ The condition for the Diagnostic Trouble Code (DTC) is no longer present and the Scan tool clear DTC function is used.
^ 100 ignition cycles have passed with no DTCs detected.

DIAGNOSTIC AIDS
^ Thoroughly inspect the wiring and the connectors. Failure to carefully and fully inspect the wiring and the connectors can result in misdiagnosis. Misdiagnosis may cause replacement of parts without repairing the malfunction.
^ Inspect for other low voltage conditions.
^ Test the charging system. Refer to Charging System Check in Starting and Charging.
^ The following conditions are other possible causes of low system voltage:
- A charging system malfunction
- Excessive parasitic drain
- A weak battery
- A faulty system ground

^ If an intermittent malfunction exists, refer to Troubleshooting Procedures Cell 4 in Diagnostic Aids.

TEST DESCRIPTION
The numbers below refer to the step numbers on the diagnostic table.
4. This step checks for a good ground.
6. This step checks for proper voltage.