VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1413, C1414

DTC Code DTC Name
C1413 Front Speed Sensor RH Output Malfunction
C1414 Front Speed Sensor LH Output Malfunction

DESCRIPTION

Refer to DTCs C1401 and C1402 Click here.

DTC No. DTC Detection Condition Trouble Area

C1413

C1414

Either of the following is detected:


  1. An open in the sensor signal circuit of a malfunctioning area occurs 255 times or more.

  2. At a vehicle speed of 20 km/h (12 mph) or more, noise occurs in the sensor signals of a malfunctioning wheel 75 times or more within 5 seconds.

  3. At a vehicle speed of 10 km/h (6 mph) or more, noise occurs once per rotor rotation for 15 seconds or more.

  • Front speed sensor RH/LH

  • Front skid control rotor RH/LH

  • Sensor installation

  • Wire harness or connector

  • Skid control ECU (Brake actuator assembly)

Tech Tips


  • DTC C1413 is for the front speed sensor RH.

  • DTC C1414 is for the front speed sensor LH.

WIRING DIAGRAM

Refer to DTCs C1401 and C1402 Click here.

INSPECTION PROCEDURE

Note

When replacing the skid control ECU (brake actuator assembly), perform zero point calibration and store system information Click here.

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION)


    1. Using the 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

    Click here

    OK

  2. READ VALUE USING GTS (FRONT SPEED SENSOR)


    1. Turn the ignition switch off.

    2. Connect the GTS to the DLC3.

    3. Start the engine.

    4. Turn the GTS on.

    5. Enter the following menus: Chassis / ABS/VSC/TRC / Data List.

    6. According to the display on the GTS, read the Data List.

      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

    7. Check that there is no difference between the speed value output from the speed sensor displayed on the GTS 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 GTS is the same as the actual vehicle speed measured using a speedometer tester (calibrated chassis dynamometer).

      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.


    NG

    Click here

    OK

  3. RECONFIRM DTC


    1. Clear the DTCs Click here.

    2. Turn the ignition switch off.

    3. Start the engine.

    4. Perform a road test.

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

      Result
      Result Proceed to
      DTCs C1413 and C1414 are not output A
      DTCs C1413 and/or C1414 are output B

    B

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    A

    USE SIMULATION METHOD TO CHECK Click here

  4. CHECK FRONT SPEED SENSOR INSTALLATION


    1. Turn the ignition switch off.

    2. A003FYBE13
      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.

    NG

    INSTALL FRONT SPEED SENSOR CORRECTLY Click here

    OK

  5. INSPECT FRONT SPEED SENSOR TIP


    1. Remove the front speed sensor Click here.

    2. Check the speed sensor tip.

      OK
      No scratches, oil, 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

  6. INSPECT FRONT SPEED SENSOR 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 rotor.

      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

  7. 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 B92 skid control ECU (brake actuator assembly) connector.

    4. Disconnect the B18 or B20 front speed sensor connector.

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

      Standard Resistance
      for RH
      Tester Connection Condition Specified Condition
      B92-31 (FR+) - B18-2 Always Below 1 Ω
      B92-31 (FR+) or B18-2 - Body ground Always 10 kΩ or higher
      B92-30 (FR-) - B18-1 Always Below 1 Ω
      B92-30 (FR-) or B18-1 - Body ground Always 10 kΩ or higher
      for LH
      Tester Connection Condition Specified Condition
      B92-18 (FL+) - B20-2 Always Below 1 Ω
      B92-18 (FL+) or B20-2 - Body ground Always 10 kΩ or higher
      B92-17 (FL-) - B20-1 Always Below 1 Ω
      B92-17 (FL-) or B20-1 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. INSPECT BRAKE ACTUATOR ASSEMBLY (SENSOR OUTPUT)


    1. A003BGLE01
      Text in Illustration
      *A for RH
      *B for LH
      *a

      Front view of wire harness connector

      (to Front Speed Sensor)

      Reconnect the B92 skid control ECU (brake actuator assembly) connector.

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      for RH
      Tester Connection Condition Specified Condition
      B18-2 - Body ground Ignition switch ON 8 to 14 V
      for LH
      Tester Connection Condition Specified Condition
      B20-2 - Body ground Ignition switch ON 8 to 14 V

      Note

      Check the speed sensor signal after replacement Click here.


    NG

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    OK

    REPLACE FRONT SPEED SENSOR Click here