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TROUBLESHOOTING SUPPLEMENTAL RESTRAINT SYSTEM (SRS) 52B-172 • The SRS warning lamp "OFF" signal is not sent to the combination meter in the cases below, • The SRS-ECU connector is disconnected. • The SRS-ECU is not working normally due to a failure in its power supply lines. • The wiring harness between the passenger’s air bag off indicator lamp and the SRS-ECU is DIAGNOSIS CODE SET CONDITIONS This diagnosis code will be set if the passenger’s air PROBABLE CAUSES • Damaged wiring harnesses or connectors • Malfunction of the SRS-ECU • Malfunction of the passenger’s air bag off indicator lamp 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. not reset. Q: Is the diagnosis code set? YES : Go to Step 3 . NO : There is an intermittent malfunction such as STEP 3. MUT-III diagnosis code CAUTION To prevent damage to MUT-III MB991958, always position. Q: Is diagnosis code B1570, B1571, B1572, B1573, B1574, B1575, B1576, B1577, B1578, B1579 or YES : Carry out the troubleshooting of the passenger’s air bag cut off switch system. ). NO : Go to Step 4 . STEP 4. Check the passenger’s air bag off Q: Is the connector correctly engaged? YES : Go to Step 5 . NO : Engage the connector correctly. Then go to AC310613 BI Connector: C-25 <LHD> Harness side AC310631BE Connector: C-25 <RHD> Harness side |