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Symptom: IGN. UNLOCK-R-S OUTPUT OVER VOLT When Monitored and Set Condition: IGN. UNLOCK-R-S OUTPUT OVER VOLT When Monitored: Ignition on. Set Condition: Battery voltage above 30 volts for more than 1 second. POSSIBLE CAUSES TEST FOR CURRENT DTC’S PCM CHARGING DTC PRESENT FCM TEST ACTION APPLICABILITY 1 With the DRBIII t, record and erase the current Front Control Module DTC’s. Cycle the ignition from ON to OFF. t. With the DRBIII t, read DTC’s. Does the DRBIII t display: Ign. UNLOCK RUN-START Output Over Volt? All Yes → Go To 2 No → The condition that caused this DTC is currently not present. Use the wiring diagram/schematic as a guide, and inspect the related 2 With the DRBIII t, read the PCM DTCs. Are any Battery or Charging System DTC’s present? All Yes → Refer to the Powertrain Diagnostics for further assistance. Perform BODY VERIFICATION TEST - VER 1. No → Go To 3 3 NOTE: This code may have set because of a battery charger installed t, erase DTCs. Start the engine. All Yes → Replace the FCM per Service Information. Perform BODY VERIFICATION TEST - VER 1. No → Test Complete. 741 IGNITION, POWER, ACCESSORY |