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Home › Fiat › 2013 › 500e › Repair and Diagnosis › Engine Performance › System › Electric Vehicle Control Unit (EVCU) Module - DTCS P1139 To U1487 - 500E › Diagnosis And Testing › P1C77-Reverse Button Stuck On › When Monitored

When Monitored

Ignition switch is in the run position.

BCM is powered on.

EVCU is powered on.

System voltage is between 10.5 and 18 volts.