CUSTOMER CONCERN The Service Hybrid System message is displayed, the Serial Data Gateway Module does not communicate, and DTC B1000 is stored. CAUSE Power and ground load tests passed, confirming an internal failure of the Serial Data Gateway Module. CORRECTION Remove and replace the Serial Data Gateway Module, program and configure the replacement module, clear B1000, and verify hybrid-system communication.

CUSTOMER CONCERN Customer states the engine will not crank after a front-end collision. No relevant DTC is initially stored. CAUSE Serial Data Gateway Module data showed Crash Detected, confirming the high-voltage impact-detection system had disabled propulsion. CORRECTION Inspect and repair high-voltage impact sensor circuit as required, perform HPCM 300-volt impact-status reset and secured high-voltage DTC reset, then verify normal cranking.

CUSTOMER CONCERN Customer states the vehicle will not crank. DTCs P0AC4, U1888, U1875 and U1878 are stored. CAUSE DLC resistance, fuse-feed and expansion-bus testing isolated an open or high-resistance circuit in the drive-motor generator power-inverter module wiring. CORRECTION Repair drive-motor generator power-inverter module wiring and connector terminals. Clear network and hybrid DTCs and verify module communication and normal cranking.