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⦆ The pulse signals, which the wheel speed sensor creates, are DTC SET CONDITIONS PROBABLE CAUSES ⦆ Wheel bearing malfunction ⦆ Deformation of the wheel speed detection encoder ⦆ Missing teeth of the wheel speed detection encoder ⦆ Adhesion of foreign materials on the wheel speed detection ⦆ ABS-ECU malfunction 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 ⦆ MB991974: ABS check harness STEP 1. M.U.T.-III CAN bus diagnostics Q:Is the check result normal? YES: Go to Step 3. NO: Repair the CAN bus lines. (Refer to GROUP 54D - CAN Bus Diagnostics table P.54D-17.) On completion, go to STEP 2. Diagnostic trouble code recheck after resetting Q:Is DTC C1043 set? YES: Go to Step 3. NO: The procedure is complete. STEP 3. Check for wheel bearing looseness NOTE: Loose wheel bearing may increase the gap between the wheel speed sensor and the wheel speed detection magnet Q:Is the check result normal? YES: Go to Step 4. NO: Replace the rear wheel hub assembly. ANTI-LOCK BRAKING SYSTEM (ABS) 35B-67 ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS |