VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C0200/31, C0205/32, C1271/71, C1272/72

DTC Code DTC Name
C0200/31 Front Speed Sensor RH Circuit
C0205/32 Front Speed Sensor LH Circuit
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)

DESCRIPTION

The speed sensor detects the wheel speed and sends the appropriate signals to the skid control ECU. These signals are used for the ABS control system. This speed sensor contains a sensor IC, which consists of 2 MREs (Magnetic Resistance Elements). The speed sensor rotor, which consists of 48 sets of N and S poles 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 the 2 MREs. Upon receiving this signal, the sensor IC outputs a forward or backward waveform to the ECU.

DTCs C1271/71 and C1272/72 will be deleted when the speed sensor sends a vehicle speed signal or when Test Mode ends. DTCs C1271/71 and C1272/72 are output only in Test Mode.

A0162H7E06
DTC Code DTC Detection Condition Trouble Area

C0200/31

C0205/32

Any of the following is detected:


  1. At a vehicle speed of 10 km/h (6 mph) or more, an open or short in the sensor signal circuit continues for 1 second or more.

  2. Momentary interruption of the sensor signal from the abnormal wheel occurs 255 times or more.

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

  4. When the vehicle is driven in reverse at a speed of 3 km/h (1.8 mph) or more and 3 of the wheel sensors detect the reverse signal, the other sensor detects a high frequency pulse 75 times while the engine switch is on (IG).

  5. At a vehicle speed of 10 km/h (6 mph) or more, the vehicle speed sensor output drops by 50% for 5 seconds.

  6. At a vehicle speed of 10 km/h (6 mph) or more, the direction of wheel rotation changes 7 times in 0.006 seconds while the engine switch is on (IG).

  7. At a vehicle speed of 30 km/h (18 mph) or more, one wheel direction is different from the other 3 wheels for 1 second.

  8. At a vehicle speed of 100 km/h (60 mph), a reverse signal is output for 1 second or more.

  9. At a vehicle speed of 30 km/h (18 mph) or more, the rotation direction of the one of the wheels is not detected normally and the rotation direction of the other 3 wheels is not the same for 1 second.

  10. With the IG1 terminal voltage 9.5 V or more, the sensor power supply voltage decreases for 0.5 seconds or more.

  • Front speed sensor RH/LH

  • Speed sensor circuit

  • Speed sensor rotor

  • Sensor installation

  • Skid control ECU

C1271/71

C1272/72

 Detected only during Test Mode.

  • Front speed sensor RH/LH

  • Sensor installation

  • Speed sensor rotor

Tech Tips


  • DTCs C0200/31 and C1271/71 are for the front speed sensor RH.

  • DTCs C0205/32 and C1272/72 are for the front speed sensor LH.

WIRING DIAGRAM

A016267E01

INSPECTION PROCEDURE

Note

When replacing the skid control ECU, perform zero point calibration and store system information Click here.

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION)


    1. Using the intelligent tester, check for any momentary interruptions in the wire harness and connector corresponding to a 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

      ERROR: Momentary interruption

      NORMAL: Normal

      		 -
      FL Speed Open Front speed sensor LH open detection / ERROR or NORMAL

      ERROR: Momentary interruption

      NORMAL: Normal

      		 -
      Result
      Result Proceed to
      There are momentary interruptions A
      There are no momentary interruptions B
      There is a constant open circuit C

      Tech Tips

      Perform the above inspection before removing the sensor and connector.


    B

    READ VALUE USING INTELLIGENT TESTER (FRONT SPEED SENSOR) Click here

    C

    CHECK FRONT SPEED SENSOR INSTALLATION Click here

    A

  2. REPAIR OR REPLACE HARNESS OR CONNECTOR (SKID CONTROL ECU - FRONT SPEED SENSOR)


    1. Turn the engine switch off.

    2. Repair or replace the harness or connector.

    3. Check for any momentary interruption between the skid control ECU and the front speed sensor Click here.

    4. Check that there is no momentary interruption.


    NEXT

  3. RECONFIRM DTC


    1. Turn the engine switch off.

    2. Clear the DTCs Click here.

    3. Start the engine.

    4. Drive the vehicle at a speed of 30 km/h (18 mph) or more for at least 60 seconds.

    5. Check if the same DTC is recorded Click here.

      Result
      Result Proceed to
      DTCs (C0200/31 and/or C0205/32) are output A
      DTCs (C0200/31 and C0205/32) are not output B

      Tech Tips

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


    B

    END

    A

  4. READ VALUE USING INTELLIGENT TESTER (FRONT SPEED SENSOR)


    1. Turn the engine switch off.

    2. Connect the intelligent tester to the DLC3.

    3. Start the engine.

    4. Select the Data List mode on the intelligent tester Click here.

      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.: 326.4 km/h (202 mph) Actual wheel speed Similar speed as indicated on speedometer
      FL Wheel Speed Front wheel speed sensor LH reading / min.: 0 km/h (0 mph), max.: 326.4 km/h (202 mph) Actual wheel speed Similar speed as indicated on speedometer

    5. Check that there is almost no difference between the speed value output from the speed sensor displayed on the intelligent tester and the speed value displayed on the speedometer when driving the vehicle.

      Tech Tips

      Factors that affect the indicated vehicle speed include tire size, tire inflation, and tire wear. The speed indicated on the speedometer has an allowable margin of error. This can be tested using a speedometer tester (calibrated chassis dynamometer). For details about testing and the margin of error, see the reference chart Click here.

      OK
      The speed value output from the speed sensor displayed on the intelligent tester is almost the same as the actual vehicle speed.
      ABS/VSC/TRC
      Tester Display Measurement Item / Range Normal Condition Diagnostic Note
      FR Wheel Direction Front wheel RH direction / FORWARD or BACK

      FORWARD: Forward

      BACK: Backward

      		 -
      FL Wheel Direction Front wheel LH direction / FORWARD or BACK

      FORWARD: Forward

      BACK: Backward

      		 -

    6. Check that the sensor signal conforms to the wheel rotation direction.

      OK
      The correct wheel rotation direction is displayed.

    NG

    CHECK FRONT SPEED SENSOR INSTALLATION Click here

    OK

  5. PERFORM TEST MODE (SIGNAL CHECK)


    1. Turn the engine switch off.

    2. Perform sensor check in Test Mode Procedure Click here.

      OK
      All Test Mode DTCs are cleared.

    NG

    CHECK FRONT SPEED SENSOR INSTALLATION Click here

    OK

  6. RECONFIRM DTC


    1. Turn the engine switch off.

    2. Clear the DTCs Click here.

    3. Start the engine.

    4. Drive the vehicle at a speed of 30 km/h (18 mph) or more for at least 60 seconds.

    5. Check if the same DTC is recorded Click here.

      Result
      Result Proceed to
      DTCs (C0200/31 and C0205/32) are not output A
      DTCs (C0200/31 and/or C0205/32) are output B

      Tech Tips

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


    B

    REPLACE FRONT SPEED SENSOR AND FRONT SPEED SENSOR ROTOR Click here

    A

    CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) Click here

  7. CHECK FRONT SPEED SENSOR INSTALLATION


    1. A0161GYE04

      Turn the engine switch off.

    2. Check the speed sensor installation.

      OK
      There is no clearance between the sensor and the front steering knuckle.

      Note

      Check the speed sensor signal after installation Click here.


    NG

    INSTALL FRONT SPEED SENSOR CORRECTLY Click here

    OK

  8. CHECK HARNESS AND CONNECTOR (SKID CONTROL SENSOR WIRE)


    1. A0163C0E03

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

    2. Disconnect the skid control sensor wire.

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

      Standard Resistance
      for RH
      Tester Connection Condition Specified Condition
      V1 ("A"-2) - V1 ("B"-1) Always Below 1 Ω
      V1 ("A"-2) - V1 ("B"-2) Always 10 kΩ or higher
      V1 ("A"-2) - Body ground Always 10 kΩ or higher
      V1 ("A"-1) - V1 ("B"-2) Always Below 1 Ω
      V1 ("A"-1) - V1 ("B"-1) Always 10 kΩ or higher
      V1 ("A"-1) - Body ground Always 10 kΩ or higher
      for LH
      Tester Connection Condition Specified Condition
      W1 ("A"-2) - W1 ("B"-2) Always Below 1 Ω
      W1 ("A"-2) - W1 ("B"-1) Always 10 kΩ or higher
      W1 ("A"-2) - Body ground Always 10 kΩ or higher
      W1 ("A"-1) - W1 ("B"-1) Always Below 1 Ω
      W1 ("A"-1) - W1 ("B"-2) Always 10 kΩ or higher
      W1 ("A"-1) - Body ground Always 10 kΩ or higher

      Note

      Check the speed sensor signal after replacement Click here.


    NG

    REPLACE SKID CONTROL SENSOR WIRE

    OK

  9. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - FRONT SPEED SENSOR)


    1. A0163CWE04

      Reconnect the skid control sensor wire.

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

    3. Disconnect the skid control ECU connector and the 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
      A35*1, J98*2-8 (FR+) - V1-2 (FR+) Always Below 1 Ω
      A35*1, J98*2-8 (FR+) - Body ground Always 10 kΩ or higher
      A35*1, J98*2-7 (FR-) - V1-1 (FR-) Always Below 1 Ω
      A35*1, J98*2-7 (FR-) - Body ground Always 10 kΩ or higher
      for LH
      Tester Connection Condition Specified Condition
      A35*1, J98*2-9 (FL+) - W1-2 (FL+) Always Below 1 Ω
      A35*1, J98*2-9 (FL+) - Body ground Always 10 kΩ or higher
      A35*1, J98*2-10 (FL-) - W1-1 (FL-) Always Below 1 Ω
      A35*1, J98*2-10 (FL-) - Body ground Always 10 kΩ or higher

      *1: for LHD

      *2: for RHD


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. INSPECT SKID CONTROL ECU (SENSOR INPUT)


    1. A0162OHE07

      Reconnect the skid control ECU 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
      V1-2 (FR+) - Body ground Engine switch on (IG) 7.5 to 14 V
      for LH
      Tester Connection Switch Condition Specified Condition
      W1-2 (FL+) - Body ground Engine switch on (IG) 7.5 to 14 V

    NG

    REPLACE SKID CONTROL ECU Click here

    OK

  11. RECONFIRM DTC


    1. Turn the engine switch off.

    2. Reconnect the front speed sensor connector.

    3. Clear the DTCs Click here.

    4. Start the engine.

    5. Drive the vehicle at a speed of 30 km/h (18 mph) or more for at least 60 seconds.

    6. Check if the same DTC is recorded Click here.

      Result
      Result Proceed to
      DTCs (C0200/31 and/or C0205/32) are output A
      DTCs (C0200/31 and C0205/32) are not output B

      Tech Tips

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


    B

    CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) Click here

    A

  12. REPLACE FRONT SPEED SENSOR AND FRONT SPEED SENSOR ROTOR


    1. Turn the engine switch off.

    2. Replace the front speed sensor Click here.

    3. Replace the front axle hub sub-assembly (front speed sensor rotor) Click here.

      Tech Tips

      The front speed sensor rotor is incorporated into the front axle hub sub-assembly.

      If the front speed sensor rotor needs to be replaced, replace it together with the front axle hub sub-assembly with front speed sensor.

      Note

      Check the speed sensor signal after replacement Click here.


    NEXT

  13. RECONFIRM DTC


    1. Clear the DTCs Click here.

    2. Start the engine.

    3. Drive the vehicle at a speed of 30 km/h (18 mph) or more for at least 60 seconds.

    4. Check if the same DTC is recorded Click here.

      Result
      Result Proceed to
      DTCs (C0200/31 and/or C0205/32) are output A
      DTCs (C0200/31 and C0205/32) are not output B

      Tech Tips

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


    B

    END

    A

    REPLACE SKID CONTROL ECU Click here