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TROUBLESHOOTING SUPPLEMENTAL RESTRAINT SYSTEM (SRS) 52B-103 Code No.B1403: Driver's air bag module (squib) system (short-circuited to the power supply) AC805793 Driver's Air Bag Module (Squib) Circuit AIR BAG MODULE CONNECTOR CONNECTOR CLOCK SPRING SRS-ECU CONNECTOR NOTE : CONNECTOR COUPLED: ON Wire colour code AB OPERATION • The SRS-ECU judges how severe a collision is by detecting signals from the front impact sensors • The ignition signal is input to the air bag module via the clock spring to inflate the air bag. DIAGNOSIS CODE SET CONDITIONS PROBABLE CAUSES • Malfunction of the clock spring • Damaged harness wires and connectors • Short to the power supply in the driver's air bag module (squib) harness • Malfunction of the SRS-ECU DIAGNOSIS PROCEDURE STEP 1. Check the diagnosis code by connecting AC501669 A C-303 Air bag AB (2) By sliding the A section (in the figure) of air bag module connector C-303 in arrow direction, |