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SRS AIR BAG DIAGNOSIS TSB Revision SUPPLEMENTAL RESTRAINT SYSTEM (SRS) 52B-106 CAUTION If DTC B1413 <1st squib> or B1493 <2nd squib> . CIRCUIT 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. . DTC SET CONDITIONS This DTC is set if there is abnormal resistance . TROUBLESHOOTING HINTS • Damaged harness wires and connectors • Short to the ground in the passenger's air bag module (squib) harness • Malfunction of the SRS-ECU . DIAGNOSIS Required Special Tools: • MB991958: Scan Tool (MUT-III Sub Assembly) • MB991824: Vehicle Communication Interface (V.C.I.) • MB991827: MUT-III USB Cable • MB991910: MUT-III Main Harness A (Vehicles with CAN Communication System) • MB991865: Dummy resistor • MB991866: Resister harness AC305362 CONNECTOR: C-121 C-121 (Y) AD SRS-ECU |