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P0AA7-727 HBC-433 < COMPONENT DIAGNOSIS > D E F G H I J K L M A B HBC N O P P0AA7-727 Description INFOID:0000000004212053 The hybrid vehicle control ECU monitors the insulation monitoring circuit located in the battery smart unit and detects a malfunction. DTC Logic INFOID:0000000004212054 DTC DETECTION LOGIC Diagnosis Procedure INFOID:0000000004212055 1. PRECONDITIONING • Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system. • After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. • Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly. >> GO TO 2. 2. REPLACE BATTERY SMART UNIT HBB-101, "Removal and Installation" >> COMPLETED DTC No. INF code Trouble diagnosis name DTC detecting condition Possible cause P0AA7 727 Hybrid Battery Voltage Isolation Malfunction in the insulation Battery smart unit |