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DIAGNOSIS TSB Revision ACTIVE STABILITY CONTROL SYSTEM (ASC) 35C-39 PROBABLE CAUSES Current trouble • Damaged wiring harness and connectors • Noise interference • Malfunction of wheel speed sensor • ASC-ECU malfunction Past trouble • Carry out diagnosis with particular emphasis on wiring har- ness and connector failures between ASC-ECU and the − How to Use Trou- bleshooting/How to Treat Past Trouble ). 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 • MB991997: ASC check harness STEP 1. Using scan tool MB991958, diagnose the CAN bus YES : Go to Step 3. − CAN Bus Diagnostics Table ). On completion, go to Step 2. STEP 2. DTC recheck after resetting CAN bus lines YES : Go to Step 3. STEP 3. Using scan tool MB991958, check data list • Item No.04: RR wheel speed sensor Q: Is the check result normal? YES : Intermittent malfunction (Refer to GROUP 00 − How to Use Troubleshooting/How to Cope with Intermittent ). NO : Go to Step 4. |