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.

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DTC No. Detection Item DTC Detection Condition Trouble Area Note
C1413 Front Speed Sensor RH Output Malfunction

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

  • Front speed sensor rotor RH (front axle hub sub-assembly RH)

  • Sensor installation

  • Skid control ECU (brake actuator assembly)

  • Wire harness or connector

 -
C1414 Front Speed Sensor LH Output Malfunction

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 LH

  • Front speed sensor rotor LH (front axle hub sub-assembly LH)

  • Sensor installation

  • Skid control ECU (brake actuator assembly)

  • Wire harness or connector

 -

WIRING DIAGRAM

Refer to DTCs C1401 and C1402.

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CAUTION / NOTICE / HINT

Note

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

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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


      Chassis > ABS/VSC/TRC > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      FR Speed Sensor Voltage Open Front speed sensor RH voltage open detection Error or Normal

      Error: Momentary interruption

      Normal: Normal

      		 -
      FL Speed Sensor Voltage Open Front speed sensor LH voltage open detection Error or Normal

      Error: Momentary interruption

      Normal: Normal

      		 -

      Chassis > ABS/VSC/TRC > Data List
      Tester Display
      FR Speed Sensor Voltage Open
      FL Speed Sensor Voltage Open
      OK
      Normal (There are no momentary interruptions.)

      Tech Tips

      Perform the above inspection before removing the sensor and connector.

      Result
      Proceed to
      OK
      NG

    NG

    CHECK FRONT SPEED SENSOR INSTALLATION Click here

    OK

  2. READ VALUE USING GTS (FRONT SPEED SENSOR)


    1. Select the Data List using the GTS.

      Click here


      Chassis > ABS/VSC/TRC > Data List
      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

      Chassis > ABS/VSC/TRC > Data List
      Tester Display
      FR Wheel Speed
      FL Wheel Speed

    2. 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.

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      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).
      Result
      Proceed to
      OK
      NG

    NG

    GO TO STEP 4 Click here

    OK

  3. RECONFIRM DTC


    1. Turn the engine switch off.

    2. Clear the DTCs.

      Click here


      Chassis > ABS/VSC/TRC > Clear DTCs

    3. Turn the engine switch off.

    4. Start the engine.

    5. Perform a road test

    6. Check if the same DTC is recorded.

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      Chassis > ABS/VSC/TRC > Trouble Codes
      Result
      Result Proceed to
      DTCs C1413 and C1414 are not output. A
      DTCs C1413 and/or C1414 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 before replacing parts.

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    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

  4. CHECK FRONT SPEED SENSOR INSTALLATION


    1. Turn the engine switch off.

    2. B006RDBC29
      *1 Front Speed Sensor
      *a Correct
      *b Incorrect
      *c 8.5 N*m
      *d No clearance

      Check the speed sensor installation.

      OK
      There is no clearance between the sensor and the front steering knuckle.
      The installation bolt is tightened properly.
      Torque
      8.5 N*m (87 kgf*cm, 75 in.*lbf)
      Result
      Proceed to
      OK
      NG

    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.

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      Result
      Proceed to
      OK
      NG

    NG

    CLEAN OR REPLACE FRONT SPEED SENSOR

    OK

  6. INSPECT FRONT SPEED SENSOR ROTOR


    1. Remove the front axle hub sub-assembly.

      Click here

    2. Check the speed sensor rotor.

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

      Note

      Check the speed sensor signal after cleaning or replacement.

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      Tech Tips


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

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

    3. Reinstall the front speed sensor and the front axle hub sub-assembly.

      Click here for the front speed sensor

      Click here for the front axle hub sub-assembly

      Result
      Proceed to
      OK
      NG

    NG

    CLEAN OR REPLACE FRONT SPEED SENSOR ROTOR

    OK

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


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

    2. Disconnect the A50 skid control ECU (brake actuator assembly) connector and the A31 and/or A6 front speed sensor connector.

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

      Standard Resistance
      for RH
      Tester Connection Condition Specified Condition
      A50-31 (FR+) - A31-2 (FR+) Always Below 1 Ω
      A50-30 (FR-) - A31-1 (FR-) Always Below 1 Ω
      A50-31 (FR+) or A31-2 (FR+) - Body ground Always 10 kΩ or higher
      A50-30 (FR-) or A31-1 (FR-) - Body ground Always 10 kΩ or higher
      for LH
      Tester Connection Condition Specified Condition
      A50-18 (FL+) - A6-2 (FL+) Always Below 1 Ω
      A50-17 (FL-) - A6-1 (FL-) Always Below 1 Ω
      A50-18 (FL+) or A6-2 (FL+) - Body ground Always 10 kΩ or higher
      A50-17 (FL-) or A6-1 (FL-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. INSPECT BRAKE ACTUATOR ASSEMBLY (SENSOR OUTPUT)


    1. B006R8IC25
      *A for RH
      *B for LH
      *a

      Front view of wire harness connector

      (to Front Speed Sensor)

      Reconnect the A50 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 Condition Specified Condition
      A31-2 (FR+) - Body ground Engine switch on (IG) 8 to 14 V
      for LH
      Tester Connection Condition Specified Condition
      A6-2 (FL+) - Body ground Engine switch on (IG) 8 to 14 V

      Note

      Check the speed sensor signal after replacement.

      Click here

      Tech Tips

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

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE FRONT SPEED SENSOR Click here

    NG

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here