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ANTILOCK BRAKE SYSTEM 4F-9 DEFECT CODES Description - Replace the ECU l Check resistance of the wheel speed sensor : 1.280K W - 1.920K W l Check wire for ground and open. l Replace the sensor. l Check resistance of the wheel speed sensor : 1.280K W - 1.920K W l Check wire for ground and open. l Replace the sensor. l Check resistance of the wheel speed sensor : 1.280K W - 1.920K W l Check wire for ground and open. l Replace the sensor. l Check resistance of the wheel speed sensor : 1.280K W - 1.920K W l Check wire for ground and open. l Replace the sensor. l Check wire for ground and open. l Check connection of the wheel speed sensor connec- tor and ECU side connector. l Measure air gap between wheel teeth and wheel speed sensor and check installation of wheel tooth. (Standard air gap : 0.35 - 1.60 mm) l Check output voltage of the sensor by rotating the wheel 1/2 - 1 revolution per second and shaking sen- sor wire. - When measured by multi - meter (AC) : output voltage > 70 mV - When measured in oscilloscope : output voltage ³ 120 mV/P-P l Replace the sensor. l Check wire for ground and open. l Check connection of the wheel speed sensor. con- nector and ECU side connector. l Measure the air gap between wheel teeth and wheel speed sensor and check installation of wheel tooth. (Standard air gap : 0.35 - 1.60 mm) l Check output voltage of the sensor by rotating the wheel 1/2 - 1 revolution per second and shaking sen- sor wire. - When measured by multi - meter (AC) : Defect Code 01 02 03 04 05 06 07 08 Application Normal Defective ECU Front/left Wheel Speed Sensor (Wire) Front/right Wheel Speed Sensor (Wire) Rear/left Wheel Speed Sensor (Wire) Rear/right Wheel Speed Sensor (Wire) Front/left Wheel Speed Sensor (Signal) Front/right Wheel Speed Sensor (Signal) |