C0901

Circuit Description
This circuit monitors the voltage level available to the ASM. If the voltage drops below 7.5 volts, full performance of the traction control system cannot be guaranteed.

Conditions for Setting the DTC
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 TCS is disabled
^ The traction control indicator is turned on

Conditions for Clearing the DTC
^ The condition for the 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 Symptoms - Engine Electrical.
^ 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 Inducing Intermittent Fault Conditions.

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.