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DIAGNOSIS TSB Revision ACTIVE STABILITY CONTROL SYSTEM (ASC) 35C-83 • Adhesion of foreign materials on the wheel speed detection encoder • Malfunction of wheel speed sensor • Improper installation of the wheel speed sensor • ASC-ECU malfunction • The number of poles on the Magnetic encoder for wheel speed detection (N-pole and S-pole) is changed Past trouble • When DTC C1015 is also set, carry out diagnosis with par- ticular emphasis on wiring harness and connector failures − How to Use Troubleshooting/How to Treat ). • When DTC C1015 is not set, the following conditions may be present: • Some wheels slip • Unstable vehicle attitude • External noise interference • Vehicle ran with the parking brake applied. • Rotate only two wheels with drum tester 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 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 : Perform the diagnosis for DTC C1015 (Refer to ). NO : Go to Step 4. |