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YES: Troubleshoot the MMCS. (Refer to GROUP 54B, Diagnosis <MMCS>.) 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 KOS-ECU and register the ID codes. (Refer NO: The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection DTC U1412: Implausible Vehicle Speed Signal Received M14209100150USA0000010000 If there is any problem in the CAN bus lines, an incorrect TPMS DTC SET CONDITION TROUBLESHOOTING HINTS ⦆ Damaged wiring harness and connector ⦆ Malfunction of ABS-ECU or ASC-ECU ⦆ Malfunction of KOS-ECU 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 STEP 1. M.U.T.-III CAN bus diagnostics KEYLESS OPERATION SYSTEM (KOS) 42B-103 DIAGNOSIS |