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DIAGNOSIS TSB Revision ACTIVE STABILITY CONTROL SYSTEM (ASC) 35C-53 CAUTION • If there is any problem in the CAN bus lines, an incor- rect diagnostic trouble code may be set. Prior to this • Whenever the ECU is replaced, ensure that the CAN bus lines are normal. • When the hydraulic unit (integrated with ASC-ECU) is replaced, always perform the calibration of steering .) . CIRCUIT OPERATION • Each wheel speed detecting section is a kind of a pulse generator. It consists of the encoder (plate on which the • The pulse signals generated by the wheel speed detecting section are sent to ASC-ECU. ASC-ECU uses the fre- . DTC SET CONDITIONS ASC-ECU monitors the signals from each wheel speed sensor • Irregular change in the wheel speed sensor signal 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 wheel speed detection • Wheel bearing malfunction detection • ASC-ECU malfunction for wheel speed detection |