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VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1413, C1414

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

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

Speed sensor rotors have rows of alternating N and S magnetic poles, and their magnetic fields change when the rotors turn.

Each speed sensor detects that magnetic change and sends a pulse signal to the skid control ECU.

DTC Code DTC Detection Condition Trouble Area

C1413

C1414

Any 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 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 10 km/h (6 mph) or more, noise occurs once per rotor rotation for 15 seconds or more.

  • Front speed sensor RH/LH

  • Speed sensor circuit

  • Speed sensor rotor

  • Brake actuator assembly (Skid control ECU)
Tip:

  • DTC C1413 is for the front speed sensor RH.

  • DTC C1414 is for the front speed sensor LH.

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WIRING DIAGRAM

Refer to DTCs C1401 and C1402 (Click here).

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INSPECTION PROCEDURE

Note:

When replacing the brake actuator assembly, perform zero point calibration (Click here).

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PROCEDURE


  1. Click here

    CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION)


    1. Using the intelligent tester, check for any momentary interruption in the wire harness and connector corresponding to the DTC (Click here).

      Table 1. ABS / VSC / TRC:
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      FR Speed Open FR speed sensor open detection / ERROR or NORMAL

      ERROR: Momentary interruption

      NORMAL: Normal

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

      ERROR: Momentary interruption

      NORMAL: Normal

      		 -
      OK
      There are no momentary interruptions.
      Tip:

      Perform the above inspection before removing the sensor and connector.


  2. Click here

    READ VALUE ON INTELLIGENT TESTER (FRONT SPEED SENSOR)


    1. Turn the ignition 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).

      Table 2. ABS / VSC / TRC:
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      FR Wheel Speed FR wheel speed sensor reading / min.: 0 km/h (0 mph), max.: 326 km/h (202 mph) Actual wheel speed Similar speed as indicated on speedometer
      FL Wheel Speed FL wheel speed sensor reading /min.: 0 km/h (0 mph), max.: 326 km/h (202 mph) Actual wheel speed Similar speed as indicated on speedometer

    5. Check that there is 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.

      Tip:

      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 the same as the actual vehicle speed measured using a speedometer tester (calibrated chassis dynamometer).

  3. Click here

    RECONFIRM DTC


    1. Turn the ignition switch off.

    2. Clear the DTCs (Click here).

    3. Start the engine.

    4. Drive the vehicle at a speed of 40 km/h (25 mph) or more for at least 60 seconds.

    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
      Tip:

      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).


  4. Click here

    CHECK FRONT SPEED SENSOR INSTALLATION


    1. A017E6ZE10

      Turn the ignition switch off.

    2. Check the speed sensor installation.

      OK
      There is no clearance between the sensor and the front steering knuckle.
      The installation nut is tightened properly.
      Torque
      8.0 N*m (82 kgf*cm, 71 in.*lbf)

  5. Click here

    CHECK 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:

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


  6. Click here

    CHECK FRONT SPEED SENSOR ROTOR


    1. Remove the front speed sensor rotor (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 (Click here).

      Tip:

      If the front speed sensor rotor needs to be replaced, replace it together with the front drive shaft assembly.


  7. Click here

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


    1. A017ESEE08

      Install the front speed sensor and the front speed sensor rotor.

    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
      A24-7 (FR+) - A25-2 (FR+) Always Below 1 Ω
      A24-7 (FR+) - Body ground Always 10 kΩ or higher
      A24-6 (FR-) - A25-1 (FR-) Always Below 1 Ω
      A24-6 (FR-) - Body ground Always 10 kΩ or higher
      for LH
      Tester Connection Condition Specified Condition
      A24-19 (FL+) - A14-2 (FL+) Always Below 1 Ω
      A24-19 (FL+) - Body ground Always 10 kΩ or higher
      A24-18 (FL-) - A14-1 (FL-) Always Below 1 Ω
      A24-18 (FL-) - Body ground Always 10 kΩ or higher

  8. Click here

    INSPECT SKID CONTROL ECU (SENSOR INPUT)


    1. A017BKWE14

      Reconnect the skid control ECU connector.

    2. Turn the ignition 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
      A25-2 (FR+) - Body ground Ignition switch on (IG) 8 to 14 V
      for LH
      Tester Connection Switch Condition Specified Condition
      A14-2 (FL+) - Body ground Ignition switch on (IG) 8 to 14 V
      Note:

      Check the speed sensor signal after replacement (Click here).

      Tip:

      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).


  9. Click here

    CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION)Click here

  10. Click here

    REPLACE FRONT SPEED SENSORClick here

  11. Click here

    REPLACE BRAKE ACTUATOR ASSEMBLYClick here

  12. Click here

    INSTALL FRONT SPEED SENSOR CORRECTLYClick here

  13. Click here

    CLEAN OR REPLACE FRONT SPEED SENSOR

  14. Click here

    CLEAN OR REPLACE FRONT SPEED SENSOR ROTOR

  15. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR