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CIRCUIT OPERATION ⦆ The wheel speed sensor is a kind of a pulse generator. It ⦆ The pulse signals, which the wheel speed sensor creates, are DTC SET CONDITIONS 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 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. 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 the diagnostic trouble code No. C1015 set? ACTIVE SKID CONTROL SYSTEM (ASC) 35C-19 DIAGNOSIS |