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STEP 2. Using scan tool MB991958, read the combination Q:Is the DTC set? YES: Diagnose the combination meter (Refer to GROUP 54Ab, NO: Go to Step 3. STEP 3. Recheck for diagnostic trouble code. (1) Erase the DTC. (2) Turn the ignition switch from "LOCK" (OFF) position to "ON" (3) Check if DTC is set. (4) Turn the ignition switch to the "LOCK" (OFF) position. Q:Is the DTC set? YES: Replace the SRS-ECU. NO: There is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, DTC U0164: A/C-ECU CAN Timeout M15204001006USA0000010000 ⦆ If the DTC U0164 is set, be sure to diagnose the ⦆ When replacing the ECU, always check that the DIAGNOSTIC FUNCTION JUDGMENT CRITERIA transmission, SRS-ECU determines that an TROUBLESHOOTING HINTS ⦆ The CAN bus line may be defective ⦆ The A/C-ECU may be defective ⦆ The SRS-ECU may be defective DIAGNOSIS Required Special Tools: ⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly) ⦆ MB991824: Vehicles Communication Interface (V.C.I.) ⦆ MB991827: M.U.T.-III USB Cable ⦆ MB991910: M.U.T.-III Main Harness A (Vehicles with SUPPLEMENTAL RESTRAINT SYSTEM (SRS) 52B-271 SRS AIR BAG DIAGNOSIS |