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SRS AIR BAG DIAGNOSIS TSB Revision SUPPLEMENTAL RESTRAINT SYSTEM (SRS) 52B-262 DTC B1488: Passenger’s Air Bag OFF Indicator Light Drive Circuit System Fault 2. CAUTION If DTC B1488 is set in the SRS-ECU, always diag- . CIRCUIT OPERATION • Power for the passenger’s air bag OFF indicator light is supplied from the ignition switch (IG1). • The passenger’s air bag OFF indicator light illu- minates when the ignition switch is turned to the . SRS-ECU IGNITION JUNCTION AIR BAG OFF RELAY JOINT TAILLIGHT FRONT ECU AIR BAG OFF JUNCTION Air Bag OFF Indicator Light Drive Circuit |