LV ELECTRICAL SYSTEM 86 E. FAULT LEVEL INDICATIONS ON INSTRUMENT CLUSTER Fault Class Level Fault Class Level Description EV critical alert Limp Home Example Level 1 HV Critical Fault Blinking NA Vehicle HVIL Open circuit HV battery keep alive relay activation line circuit open E-drive power supply relay activation line circuit open Level 2 HV component Fault with Limp Home Enable ON Blinking E-drive contactor low side activation line circuit short to ground MCU Contactor weld component failure Level 3 HV component Fault ON NA PTC contactor low side activation line circuit open E-drive power supply relay activation line circuit short to ground Level 4 Limp Home mode (Fault) NA Blinking Control Module Internal - System Internal failures, Vehicle Communication Bus C – Bus off Level 5 No vehicle Indication NA NA Lost communication with SRC bus signal/message failures Lost communication with BCM bus signal/message failures Level 6 Charging related critical fault- service station visit is required NA Blinking DC Charging Inlet temperature sensor- value above allowable range, Charging- Vehicle Inlet PP Signal Invalid Level 7 Charging Fault where customer activity can heal fault NA ON Charging- Gun Lock Pin actuator stuck close/open Level 8 Charging related critical fault- service station visit is required Blinking Blinking Accelerator Pedal Sensor 1 ,2 Level 10 Charging Fault where customer activity can heal fault NA Blinking Cruise Switch sensor input to VECU SCB, open Level 11 HV Charging system fault NA ON Traction Cooling Pump DTCs, Battery cooling pump, Cabin cooling SV Level 12 HV Charging system fault ON Blinking CCS DC Fast Charging – Both contactors welded
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