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DIAGNOSIS TSB Revision ACTIVE SKID CONTROL SYSTEM (ASC) 35C-99 PROBABLE CAUSES • Damaged wiring harness and connectors • External noise interference • Malfunction of wheel speed sensor • ABS-ECU malfunction • Excessive gap between the wheel speed sensor and the wheel speed detection encoder • Adhesion of foreign materials on the wheel speed sensor • Adhesion of foreign materials on the wheel speed detection encoder • Wheel bearing malfunction • Improper installation of the wheel speed sensor • Deformation of the wheel speed detection encoder • Disturbance of magnetization pattern for wheel speed detection encoder • Missing teeth of the wheel speed detection encoder 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. − Troubleshooting .) After repairing the CAN bus line, go to Step 2. STEP 2. DTC recheck after repairing the CAN bus line YES : Go to Step 3. STEP 3. Scan tool diagnostic trouble code YES : Carry out the diagnosis for the diagnostic trouble codes that are set, and then go to Step 5. NO : Go to Step 4. |