VEHICLE STABILITY CONTROL SYSTEM (for Hydraulic Brake Booster), Diagnostic DTC:C1413, C1275, C1276, C1414

DTC Code DTC Name
C1413 Front Speed Sensor RH Output Malfunction
C1275 Abnormal Change in Output Signal of Front Speed Sensor RH (Test Mode DTC)
C1276 Abnormal Change in Output Signal of Front Speed Sensor LH (Test Mode DTC)
C1414 Front Speed Sensor LH Output Malfunction

DESCRIPTION

Refer to DTCs C1401 and C1402 Click here.

DTC Code DTC Detection Condition Trouble Area

C1413

C1414

One of the following conditions is met:


  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 sensor wire RH/LH

  • Speed sensor circuit

  • Front speed sensor rotor RH/LH

  • Master cylinder solenoid (Skid control ECU)

C1275

C1276

 Stored only during test mode.

  • Front speed sensor RH/LH

  • Front speed sensor rotor RH/LH

Tech Tips


  • DTCs C1413 and C1275 are for the front speed sensor RH.

  • DTCs C1414 and C1276 are for the front speed sensor LH.

WIRING DIAGRAM

Refer to DTCs C1405 and C1406 Click here.

INSPECTION PROCEDURE

Note


  • When replacing the master cylinder solenoid, perform calibration Click here.

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

PROCEDURE


  1. 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.

      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 -
      FL Speed Open Front speed sensor LH open detection/ Error or Normal Normal -
      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 INTELLIGENT TESTER (FR/FL WHEEL SPEED)


    1. Turn the ignition switch off.

    2. Connect the intelligent tester to the DLC3.

    3. Start the engine.

    4. Turn the intelligent tester on.

    5. Enter the following menus: Chassis / ABS/VSC/TRC / 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) Actual wheel speed No large fluctuations when driving at a constant speed.
      FL Wheel Speed Front wheel speed sensor LH reading/ Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph) Actual wheel speed No large fluctuations when driving at a constant speed.

    6. 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.

      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, refer to 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).

    NG

    Click here

    OK

  3. PERFORM TEST MODE (SIGNAL CHECK)


    1. Turn the ignition switch off.

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

      OK
      All test mode DTCs are cleared.

    NG

    Click here

    OK

  4. RECONFIRM DTC


    1. Clear the DTCs Click here.

    2. Start the engine.

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

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

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

    B

    Click here

    A

    USE SIMULATION METHOD TO CHECK Click here

  5. CHECK FRONT SPEED SENSOR INSTALLATION


    1. Turn the ignition switch off.

    2. A00O4Y5E49
      Text in Illustration
      *1 Front Speed Sensor
      *a No clearance
      *b OK
      *c NG

      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

    OK

  6. 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.


    NG

    CLEAN OR REPLACE FRONT SPEED SENSOR

    OK

  7. INSPECT FRONT SPEED SENSOR ROTOR


    1. Remove the front axle with ABS rotor bearing assembly Click here.

    2. Check the speed sensor rotor.

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

      Tech Tips

      The front speed sensor rotor is incorporated into the front axle with ABS rotor bearing assembly.

      If the front speed sensor rotor needs to be replaced, replace it together with the front axle with ABS rotor bearing assembly.


    NG

    CLEAN OR REPLACE FRONT SPEED SENSOR ROTOR

    OK

  8. INSPECT SKID CONTROL SENSOR WIRE


    1. Remove the skid control sensor wire Click here.

    2. A00O4R3E06
      Text in Illustration
      *A for RH
      *B for LH
      *1 Skid Control Sensor Wire

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

      Standard Resistance
      for RH
      Tester Connection Condition Specified Condition
      Ap1-1 - p1-1 (FR-) Always Below 1 Ω
      Ap1-2 - p1-2 (FR+) Always Below 1 Ω
      Ap1-1 - Ap1-2 Always 10 kΩ or higher
      for LH
      Tester Connection Condition Specified Condition
      Ap2-1 - p2-1 (FL-) Always Below 1 Ω
      Ap2-2 - p2-2 (FL+) Always Below 1 Ω
      Ap2-1 - Ap2-2 Always 10 kΩ or higher

    NG

    REPLACE SKID CONTROL SENSOR WIRE Click here

    OK

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


    1. Install the skid control sensor wire.

    2. Disconnect the A7 skid control ECU connector.

    3. Disconnect the p1 and/or p2 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
      A7-3 (FR+) - p1-2 (FR+) Always Below 1 Ω
      A7-3 (FR+) - Body ground Always 10 kΩ or higher
      A7-17 (FR-) - p1-1 (FR-) Always Below 1 Ω
      A7-17 (FR-) - Body ground Always 10 kΩ or higher
      for LH
      Tester Connection Condition Specified Condition
      A7-18 (FL+) - p2-2 (FL+) Always Below 1 Ω
      A7-18 (FL+) - Body ground Always 10 kΩ or higher
      A7-4 (FL-) - p2-1 (FL-) Always Below 1 Ω
      A7-4 (FL-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. CHECK TERMINAL VOLTAGE (FR+, FL+)


    1. Disconnect the p1 and/or p2 speed sensor connector.

    2. Connect the A7 skid control ECU connector.

    3. A00O564E07
      Text in Illustration
      *A for RH
      *B for LH
      *a

      Front view of wire harness connector

      (to Front Speed Sensor)

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

      Standard Voltage
      for RH
      Tester Connection Switch Condition Specified Condition
      p1-2 (FR+) - Body ground Ignition switch ON 11 to 14 V
      for LH
      Tester Connection Switch Condition Specified Condition
      p2-2 (FL+) - Body ground Ignition switch ON 11 to 14 V
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE MASTER CYLINDER SOLENOID Click here

    C

    REPLACE MASTER CYLINDER SOLENOID Click here

    A

  11. RECONFIRM DTC


    1. Clear the DTC Click here.

    2. Start the engine.

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

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

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

    B

    Click here

    A

    USE SIMULATION METHOD TO CHECK Click here

  12. REPLACE FRONT SPEED SENSOR


    1. Replace the front speed sensor Click here.


    NEXT

  13. RECONFIRM DTC


    1. Clear the DTC Click here.

    2. Start the engine.

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

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

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

    B

    REPLACE FRONT AXLE WITH ABS ROTOR BEARING ASSEMBLY Click here

    A

    END