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NO: Repair the wiring harness. STEP 3. Retest the system Q:Is the communication between scan tool and SRS-ECU possible? YES: Intermittent malfunction (Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points -How to NO: Replace SRS-ECU. (Refer to P.52B-326.) INSPECTION PROCEDURE 3:The SRS Warning Light does not Illuminate. M15204000104USA0000010000 CIRCUIT OPERATION ⦆ SRS-ECU sends the SRS warning light signal to the ⦆ As a cause, the failure of CAN bus line, combination TROUBLESHOOTING HINTS ⦆ Damaged wiring harness and connectors ⦆ Combination meter malfunction ⦆ Malfunction of SRS-ECU DIAGNOSIS STEP 1. Combination meter check Q:Is the check result normal? YES: Replace SRS-ECU. (Refer to P.52B-326.) NO: Replace the combination meter (Refer to GROUP 54Ab, INSPECTION PROCEDURE 4: The SR SWarning Light does not Go Out. M15204000105USA0000010000 CIRCUIT OPERATION ⦆ SRS-ECU sends the SRS warning light signal to the ⦆ As a cause, the failure of CAN bus line, combination TROUBLESHOOTING HINTS ⦆ Damaged wiring harness and connectors ⦆ Combination meter malfunction ⦆ Malfunction of SRS-ECU DIAGNOSIS Required Special Tools: ⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly) ⦆ MB991824: Vehicle Communication Interface (V.C.I.) ⦆ MB991817: M.U.T.-III USB Cable ⦆ MB991910: M.U.T.-III Main Harness A (Vehicles with SUPPLEMENTAL RESTRAINT SYSTEM (SRS) 52B-311 SRS AIR BAG DIAGNOSIS |