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SRS AIR BAG DIAGNOSIS TSB Revision SUPPLEMENTAL RESTRAINT SYSTEM (SRS) 52B-247 DTC B1C39: Driver's Seat Belt Pre-tensioner (Squib) System (Shorted to Squib Circuit Power Supply) CAUTION If DTC B1C39 is set in the SRS-ECU, always diag- . CIRCUIT OPERATION The SRS-ECU judges how severe a collision is by . DTC SET CONDITIONS This DTC is set if there is abnormal resistance . TROUBLESHOOTING HITS • Damaged wiring harnesses or connectors • Short to the power supply in the driver's seat belt pre-tensioner (squib) harness • Malfunction of the SRS-ECU : CONNECTOR COUPLED: ON NOTE Seat Belt Pre-Tensioner (Driver's side) (Squib) Circuit SRS-ECU SEAT BELT CONNECTOR CONNECTOR AC901076 C-27 (Y) AC Connector: C-27 AC901080AD Connector: D-121 D-121 (B) |