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Home >> Lexus >> 2006 >> RX 330 AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 8 (Brakes - Abs With EBD & BD & TRAC & VSC (Diagnostics)) >> DTC C0200/31, C0205/32, C1235/35, C1236/36: Right Front Wheel Speed Sensor Signal Malfunction; Left Front Wheel Speed Sensor Signal Malfunction; Metal Stick To Speed Sensor (Fr); Metal Stick To Speed Sensor (Fl) >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2006 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.

The speed sensor detects wheel speed and sends the appropriate signals to the ECU. These signals are used to control the ABS, BA, TRAC, A-TRAC, VSC, AUTO LSD, DAC and HAC control systems. This speed sensor contains a sensor IC, which consists of 2 MREs (Magnetic Resistance Element). The speed sensor rotor, which consists of 48 sets of N and S poles that are arranged in a circle, is integrated with the inner race of the hub bearing.

To detect the rotation direction, the output waves are used to determine the relationship of the pulses that are generated by 2 MREs. Upon receiving this signal, the sensor IC outputs a forward or backward wave to the ECU.

Fig 1: Identifying Speed Sensor Blinking Pattern
G04335946Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
DIAGNOSTIC TROUBLE CODE TABLE

DTC No. DTC Detection Condition Trouble Area
C0200/31
C0205/32		 When any of the following conditions is detected:
  1. At a vehicle speed of 6 mph (10 km/h) or more, pulses are not input for 1 second.
  2. Momentary interruption of the speed sensor signal occurs at least 255 times when switching the ignition switch ON and OFF.
  3. Continuous noise occurs in speed sensor signals at a vehicle speed of 12 mph (20 km/h) or more.
  4. Speed sensor signal circuit is open for 0.12 seconds or more.
  5. 3 of the wheel sensors detect normal reversing signals, and the other wheel sensor detects malfunction signals 75 times with IG ON while reversing at 3 km/h.
  6. Rotating direction of each wheel changes 7 times within 0.006 seconds with IG ON while driving at 10 km/h or more.
  7. Rotating direction of one of the wheels is not the same as that of the other wheels for 1 second while driving at 30 km/h or more.
  8. Reversing signal is output for 1 second or more while driving at 100 km/h or more.
  9. Rotating direction of one of the wheels is not detected normally, and the rotating direction of each of the other wheels is not the same for 1 second while driving at 30 km/h or more.
  • Right front and left front speed sensor
  • Each speed sensor circuit
  • Speed sensor rotor
  • Sensor installation
  • Master cylinder solenoid
C1235/35
C1236/36		 Continuous noise occurs in speed sensor signals when vehicle speed is 12 mph (20 km/h) or more for 5 seconds or more.
  • Right front and left front speed sensor
  • Speed sensor rotor
  • Sensor installation
  • Master cylinder solenoid

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