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Home >> Lexus >> 2017 >> RX 450h Base >> Repair and Diagnosis (Single Page) >> Brakes >> Traction Control >> Electronically Controlled Brake System (Diagnostic Codes) (6 Of 7) >> Electronically Controlled Brake System >> DTC C1464: Front Speed Sensor RH Circuit; DTC C1465: Front Speed Sensor LH Circuit [08/2019 - ] >> Monitor Description

Monitor Description

C0501, C0507, C140B, C140C: 

  1. When the vehicle is being driven, if the value of the speed sensor which is outputting the lowest vehicle speed is significantly lower than the values of the other speed sensors, or the value of the speed sensor which is outputting the lowest vehicle speed is 0 km/h (0 mph), the skid control ECU assembly judges that the speed sensor is malfunctioning and illuminates the MIL and stores a DTC.
  2. Also, when a wheel speed is being output (the wheel is not locked), if the output values of the speed sensors for 2 wheels are stuck at 0 km/h (0 mph), the skid control ECU assembly judges that a speed sensor is malfunctioning and illuminates the MIL and stores a DTC.

C0502, C0503, C0508, C0509, C14E1, C14E4: 

  1. The skid control ECU assembly monitors the output voltage and power supply voltage of the speed sensors. If the output voltage of the speed sensor is outside the normal range, or if the voltage at VM1 of the skid control ECU assembly is normal and the power supply voltage of the speed sensor drops below a specific value, the skid control ECU assembly judges that the circuit of the speed sensor is malfunctioning and illuminates the MIL and stores a DTC.

C0504, C050A: 

  1. When the vehicle is being driven and the output value of the speed sensor is momentarily interrupted repeatedly, the skid control ECU assembly judges that there is a momentary interruption in the speed sensor circuit and illuminates the MIL and stores a DTC.
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