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ABS DIAGNOSIS TSB Revision ANTI-LOCK BRAKING SYSTEM (ABS) 35B-101 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 magnetic encoder for wheel speed detection • Adhesion of foreign materials on the wheel speed sensor • Adhesion of foreign materials on the magnetic encoder for wheel speed detection • Wheel bearing malfunction • Improper installation of the wheel speed sensor • Deformation of the magnetic encoder for wheel speed detection • Disturbance of magnetization pattern for magnetic encoder for wheel speed detection • Missing teeth of the magnetic encoder for wheel speed detection DIAGNOSIS Required Special Tools: • MB991958: Scan Tool (M.U.T.-III Sub Assembly) • MB991816: 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 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 the DTC YES : Carry out the diagnosis for the relevant DTCs. |