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TROUBLESHOOTING SUPPLEMENTAL RESTRAINT SYSTEM (SRS) 52B-144 DIAGNOSIS PROCEDURE STEP 1. MUT-III CAN bus diagnostics Use the MUT-III to diagnose the CAN bus lines. Q: Is the check result normal? YES : Go to Step 2. NO : Repair the CAN bus line (Refer to GROUP STEP 2. Check whether the diagnosis code is Check again if the diagnosis code is set. (2) Ignition: LOCK (OFF) position to ON not reset. Q: Is the diagnosis codes set? YES : Replace the SRS-ECU (Refer to NO : There is an intermittent malfunction such as ). B1548 CAN communication • When the CAN communication are abnormal B1549 • When the CAN communication are error B1552 Changing of Power Supply • Short circuit in the changing circuit B1553 • Open circuit in the changing circuit B1554 SG-BYPASS • When the ASIC (frontal activation) are abnormal B1555 • When the ROM or RAM are abnormal B1557 ASIC • When the ASIC are abnormal Code No. Part/Circuit integral to Trouble causes |