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ABS DIAGNOSIS TSB Revision ANTI-LOCK BRAKING SYSTEM (ABS) 35B-65 DTC No. C102A: Mutual monitoring of RL wheel speed sensor CAUTION • If there is any problem in the CAN bus lines, an incor- rect DTC may be set. Prior to this diagnosis, diagnose − CAN Bus Line Diagnostic Flow • Whenever ECU is replaced, ensure that the CAN bus lines are normal. . CIRCUIT OPERATION • The wheel speed sensor is a kind of a pulse generator. It consists of encoders (a plate on which north and south pole • The pulse signals, which the wheel speed sensor creates, are sent to ABS-ECU. ABS-ECU uses the frequency of the . DTC SET CONDITIONS ABS-ECU monitors the signals from each wheel speed sensor • Missing wheel speed sensor signal • Wheel speed sensor signal continuously indicates lower 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 bearing malfunction • Deformation of the magnetic encoder for wheel speed detection • Adhesion of foreign materials on the magnetic encoder for wheel speed detection • Malfunction of wheel speed sensor • Improper installation of the wheel speed sensor • ABS-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 |