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SRS AIR BAG DIAGNOSIS TSB Revision SUPPLEMENTAL RESTRAINT SYSTEM (SRS) 52B-135 CAUTION If DTC B1B1B is set in the SRS-ECU, always diag- . CIRCUIT OPERATION • The SRS-ECU judges how severe a collision is by detecting signals from the side impact sensors • The ignition signal is input to the curtain air bag module (LH) to inflate the curtain air bag. . DTC SET CONDITIONS This DTC is set if there is abnormal resistance . TROUBLESHOOTING HITS • Improper engaged connector or defective short spring* • Short circuit between the curtain air bag module (LH) (squib) circuit terminals • Damaged connector(s) • Malfunction of the SRS-ECU NOTE: *: The squib circuit connectors integrate a ). Therefore, if connector C-36, D-15 or F-28 is damaged or improperly engaged, the DIAGNOSIS Required Special Tools: • MB991958: Scan Tool (M.U.T.-III Sub Assembly) • MB991824: Vehicle Communication Interface (V.C.I.) • MB991827: M.U.T.-III USB Cable • MB991910: M.U.T.-III Main Harness A (Vehicles with CAN Communication System) • MB991865: Dummy resistor • MB991866: Resister harness AC708951AD Connector: C-36 C-36 (Y) AC708955AB Connector: D-15 D-15 (Y) AC708970AB Connector: F-28 F-28 (B) |