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DIAGNOSIS TSB Revision ACTIVE STABILITY CONTROL SYSTEM (ASC) 35C-155 • ASC-ECU malfunction • External noise interference 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. Using scan tool MB991958, diagnose the CAN bus YES : Go to Step 2. − CAN Bus Diagnostics Table .) On completion, go to Step 7. STEP 2.Using scan tool MB991958, diagnostic trouble YES : Troubleshoot for the relevant diagnostic trouble code (Refer to NO : Go to Step 3. STEP 3. Using scan tool MB991958, diagnostic trouble YES : Troubleshoot the relevant diagnostic trouble code, and then go to Step 7. NO : Go to Step 4. STEP 4. ETACS-ECU coding data check − Precautions before Service/Coding List . Q: Is the check result normal? YES : Go to Step 6. STEP 5. ETACS-ECU variant coding YES : Go to Step 7. − ETACS-ECU |