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 Low Voltage Electrical System (LV) 108
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