ANTI-LOCK BRAKE SYSTEM, Diagnostic DTC:C0200/31, C0205/32, C1235/35, C1236/36, C1271/71, C1272/72, C1275/75, C1276/76

DTC Code DTC Name
C0200/31 Front Speed Sensor RH Circuit
C0205/32 Front Speed Sensor LH Circuit
C1235/35 Foreign Object is Attached on Tip of Front Speed Sensor RH
C1236/36 Foreign Object is Attached on Tip of Front Speed Sensor LH
C1271/71 Low Output Signal of Front Speed Sensor RH (Test Mode DTC)
C1272/72 Low Output Signal of Front Speed Sensor LH (Test Mode DTC)
C1275/75 Abnormal Change in Output Signal of Front Speed Sensor RH (Test Mode DTC)
C1276/76 Abnormal Change in Output Signal of Front Speed Sensor LH (Test Mode DTC)

DESCRIPTION

The speed sensor detects the wheel speed and sends the appropriate signals to the skid control ECU (brake actuator assembly). These signals are used for ABS control.

The speed sensor generates vehicle speed pulses based on the rotation of the skid control rotor. The skid control ECU (brake actuator assembly) detects the speed of each wheel using this vehicle speed pulse.

DTCs C1271/71 to C1276/76 can be cleared when the speed sensor sends a vehicle speed signal or the Test Mode ends. DTCs C1271/71 to C1276/ 76 are output only in the Test Mode.

Tech Tips

When the connectors between the speed sensor and skid control ECU (brake actuator assembly) are connected, the following waveform is output.

B007VSAE01
Text in Illustration
*1 Front Speed Sensor *2 Front Skid Control Rotor
*a

Waveform (Reference):

Between Speed Sensor (-) and Body Ground

 *b Low speed
*c High speed - -
DTC No. DTC Detection Condition Trouble Area

C0200/31

C0205/32

  • With the vehicle speed 10 km/h (6 mph) or higher, an open or short circuit in the speed sensor signal circuit continuously occurs for 15 seconds or more.

  • An open in the speed sensor signal circuit continues for 0.5 seconds or more.

  • From when the ignition switch is turned to ON until it is turned off, a speed sensor momentary open circuit signal occurs 255 times or more.

  • Front speed sensor RH/LH

  • Front speed sensor RH/LH circuit

  • Skid control rotor

  • Sensor installation

  • Skid control ECU (brake actuator assembly)

C1235/35

C1236/36

 With the vehicle speed 20 km/h (12 mph) or higher, noise is detected 75 times in the speed sensor signal within 5 seconds.

  • Front speed sensor RH/LH

  • Skid control rotor

  • Sensor installation

  • Skid control ECU (brake actuator assembly)

C1271/71

C1272/72

 Detected only during Test Mode.

  • Front speed sensor RH/LH

  • Sensor installation

  • Skid control rotor

C1275/75

C1276/76

 Detected only during Test Mode.

  • Front speed sensor RH/LH

  • Skid control rotor

Tech Tips


  • DTC No. C0200/31 and C1235/35 are for the front speed sensor RH.

  • DTC No. C0205/32 and C1236/36 are for the front speed sensor LH.

WIRING DIAGRAM

B007PYTE02

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION OF FRONT SPEED SENSOR)


    1. Using a GTS, check for any momentary interruption in the wire harness and connector corresponding to the DTC Click here.

      ABS/VSC/TRC
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      FR Speed Open Front speed sensor RH open detection / Error or Normal Normal Error: Momentary interruption
      FL Speed Open Front speed sensor LH open detection / Error or Normal Normal Error: Momentary interruption
      OK
      Normal (There are no momentary interruptions.)

      Tech Tips

      Perform the above inspection before removing the sensor and connector.


    NG

    CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - FRONT SPEED SENSOR) Click here

    OK

  2. READ VALUE USING GTS (FRONT SPEED SENSOR)


    1. Select the DATA LIST mode on the GTS.

      ABS/VSC/TRC
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      FR Wheel Speed Front wheel speed sensor RH reading / Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations
      FL Wheel Speed Front wheel speed sensor LH reading / Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations

    2. Check that the speed value output from the speed sensor displayed on the GTS and the speed value displayed on the speedometer are almost the same when driving the vehicle.

      OK
      The speed value output from the speed sensor displayed on the GTS is the same as the actual vehicle speed.

    NG

    INSPECT FRONT SPEED SENSOR INSTALLATION Click here

    OK

  3. PERFORM TEST MODE (SIGNAL CHECK)


    1. Perform sensor signal check in TEST MODE PROCEDURE Click here.

      OK
      All Test Mode DTCs are cleared.

    NG

    INSPECT FRONT SPEED SENSOR INSTALLATION Click here

    OK

  4. RECONFIRM DTC


    1. Clear the DTCs Click here.

    2. Drive the vehicle at a speed of approximately 30 km/h (19 mph) or more for 60 seconds or more.

    3. Check that the same DTCs are recorded Click here.

      Result
      Result Proceed to
      DTC is not output A
      DTC is output B

      Tech Tips

      If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step Click here.


    B

    REPLACE FRONT SPEED SENSOR Click here

    A

    USE SIMULATION METHOD TO CHECK Click here

  5. INSPECT FRONT SPEED SENSOR INSTALLATION


    1. Turn the ignition switch off.

    2. B007W6NE01
      Text in Illustration
      *a Normal
      *b Abnormal
      *c Clearance

      Check the speed sensor installation Click here.

      OK
      There is no clearance between the sensor and the front steering knuckle.
      The installation bolt is tightened properly.

      Note

      Check the speed sensor signal after replacement Click here.


    NG

    INSTALL FRONT SPEED SENSOR CORRECTLY OR REPLACE FRONT SPEED SENSOR

    OK

  6. INSPECT SPEED SENSOR TIP


    1. Remove the front speed sensor Click here.

    2. Check the sensor tip.

      OK
      No scratches or foreign matter on the sensor tip.

      Note


      • If no damage to the speed sensor tip is found during this inspection, do not replace the speed sensor.

      • If there is iron powder sticking to the rotor, this will result in a malfunction, so confirm that the rotor is not contaminated with foreign material before replacing the sensor.

      • Check the speed sensor signal after cleaning or replacement Click here.


    NG

    CLEAN OR REPLACE FRONT SPEED SENSOR

    OK

  7. INSPECT FRONT SKID CONTROL ROTOR


    1. Remove the front skid control rotor Click here.

    2. Check the front skid control rotor.

      OK
      No scratches, oil, or foreign matter on the rotors.

      Note

      Check the speed sensor signal after cleaning or replacement Click here.

    3. Reinstall the front speed sensor and the front skid control rotor Click here for speed sensor, Click here for skid control rotor).


    NG

    CLEAN OR REPLACE FRONT SKID CONTROL ROTOR

    OK

  8. CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - FRONT SPEED SENSOR)


    1. Turn the ignition switch off.

    2. Make sure that there is no looseness at the locking part and the connecting part of the connectors.

    3. Disconnect the B19 skid control ECU (brake actuator assembly) connector and the B18 and/or B20 front speed sensor connector.

    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      for RH
      Tester Connection Condition Specified Condition
      B19-31 (FR+) - B18-2 Always Below 1 Ω
      B19-31 (FR+) or B18-2 - Body ground Always 10 kΩ or higher
      B19-30 (FR-) - B18-1 Always Below 1 Ω
      B19-30 (FR-) or B18-1 - Body ground Always 10 kΩ or higher
      for LH
      Tester Connection Condition Specified Condition
      B19-9 (FL+) - B20-2 Always Below 1 Ω
      B19-9 (FL+) or B20-2 - Body ground Always 10 kΩ or higher
      B19-8 (FL-) - B20-1 Always Below 1 Ω
      B19-8 (FL-) or B20-1 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. INSPECT BRAKE ACTUATOR ASSEMBLY


    1. B007QEOE02
      Text in Illustration
      *A for RH
      *B for LH
      *a

      Front view of wire harness connector

      (to Front Speed Sensor)

      Reconnect the B19 skid control ECU (brake actuator assembly) connector.

    2. Turn the engine switch on (IG).

    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      for RH
      Tester Connection Switch Condition Specified Condition
      B18-2 - Body ground Ignition switch ON 5.7 to 14 V
      for LH
      Tester Connection Switch Condition Specified Condition
      B20-2 - Body ground Ignition switch ON 5.7 to 14 V

      Note

      Check the speed sensor signal after replacement Click here.


    NG

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    OK

  10. RECONFIRM DTC


    1. Reconnect the B18 and/or B20 front speed sensor connector.

    2. Clear the DTCs Click here.

    3. Drive the vehicle at a speed of approximately 30 km/h (19 mph) or more for 60 seconds or more.

    4. Check that the same DTCs are recorded Click here.

      Result
      Result Proceed to
      DTC is not output A
      DTC is output B

    B

    REPLACE FRONT SPEED SENSOR Click here

    A

    USE SIMULATION METHOD TO CHECK Click here

  11. REPLACE FRONT SPEED SENSOR


    1. Replace the front speed sensor Click here.

      Note

      Check the speed sensor signal after replacement Click here.


    NEXT

  12. RECONFIRM DTC


    1. Clear the DTCs Click here.

    2. Drive the vehicle at a speed of approximately 30 km/h (19 mph) or more for 60 seconds or more.

    3. Check that the same DTCs are recorded Click here.

      Result
      Result Proceed to
      DTC is not output A
      DTC is output B

    B

    REPLACE FRONT SKID CONTROL ROTOR Click here

    A

    END

  13. REPLACE FRONT SKID CONTROL ROTOR


    1. Replace the front skid control rotor Click here.

      Note

      Check the speed sensor signal after replacement Click here.


    NEXT

  14. RECONFIRM DTC


    1. Clear the DTCs Click here.

    2. Drive the vehicle at a speed of approximately 30 km/h (19 mph) or more for 60 seconds or more.

    3. Check that the same DTCs are recorded Click here.

      Result
      Result Proceed to
      DTC is not output A
      DTC is output B

    B

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    A

    END