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DIAGNOSIS TSB Revision ACTIVE SKID CONTROL SYSTEM (ASC) 35C-63 DTC SET CONDITIONS ASC-ECU monitors the signals from each wheel speed sensor • Irregular change in the wheel speed sensor signal • Wheel speed sensor signal continuously indicates higher value than the values of other wheel speed sensors. . PROBABLE CAUSES Current trouble • 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 • Malfunction of wheel speed sensor • Damaged wiring harness and connectors • External noise interference • Improper installation of the wheel speed sensor • Deformation of the magnetic encoder for wheel speed detection • ASC-ECU malfunction • Disturbance of magnetization pattern for magnetic encoder for wheel speed detection • The number of poles on the magnetic encoder for wheel speed detection (the number of N-pole and S-pole) is Past trouble • When DTC No. C102B is also set, perform the diagnosis with a particular emphasis on the wiring harness and con- − How to Use Troubleshoot- ing/Inspection Service Points • When the diagnostic trouble code No.C102B is not set, the following conditions may be present: • Wheel(s) spinning • Unstable vehicle attitude (spin) • External noise interference • Vehicle ran with the parking brake applied. 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 |