ANTI-LOCK BRAKE SYSTEM, Diagnostic DTC:C1275, C1276, C1413, C1414

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

DESCRIPTION

Refer to DTCs C1271, C1272, C1401 and C1402 Click here.

DTC No. DTC Detection Condition Trouble Area

C1413

C1414

When any of following conditions detected:


  • The pulse signal from the speed sensor is momentarily interrupted 7 times or more.

  • There is noise in the speed sensor for 5 seconds or more continuously.

  • ABS control operates consecutively, for 45 seconds or more continuously.

  • When the vehicle starts moving, the wheel speed abruptly increases three or more times in a row, or at a vehicle speed of 50 km/h or more, 3 wheels are detected making a full revolution, but the rotation of the remaining wheel cannot be detected.

  • Missing teeth are detected on the front skid control rotor 3 times within 2 seconds.

  • Solenoid drive continues for 13 seconds or more on the front wheel, and continues for 20 seconds or more on the rear wheel.

  • Oscillation in wheel speed pulse detected.

  • Harness or connector

  • Front speed sensor RH/LH

  • Front speed sensor installation

  • Front skid control rotor RH/LH

  • Brake actuator assembly

C1275

C1276

 Detected only during Test Mode.

  • Front speed sensor RH/LH

  • Front skid control rotor RH/LH

Tech Tips


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

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

WIRING DIAGRAM

Refer to DTCs C1271, C1272, C1401 and C1402 Click here.

INSPECTION PROCEDURE

Note

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

PROCEDURE


  1. CHECK FRONT SPEED SENSOR INSTALLATION


    1. A01CHFPE04
      Text in Illustration
      *1 Front Speed Sensor
      *a No clearance
      *b OK
      *c NG

      Check the front speed sensor installation.

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

    NG

    INSTALL FRONT SPEED SENSOR CORRECTLY Click here

    OK

  2. INSPECT FRONT SPEED SENSOR TIP


    1. Remove the front speed sensor Click here.

    2. Check the front speed sensor tip.

      OK
      No scratches, oil, or foreign matter on the front speed sensor tip.

      Note

      If no damage to the front speed sensor tip is found during this inspection, do not replace the front speed sensor.

    3. Reinstall the front speed sensor.


    NG

    CLEAN OR REPLACE FRONT SPEED SENSOR Click here

    OK

  3. INSPECT FRONT SKID CONTROL ROTOR


    1. Remove the front skid control rotor.

    2. Check the speed sensor rotor.

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

    3. Reinstall the front skid control rotor.


    NG

    CLEAN OR REPLACE SKID CONTROL ROTOR

    OK

  4. INSPECT FRONT SPEED SENSOR


    1. Remove the front speed sensor.

    2. A01CHQ0E01
      Text in Illustration
      *a

      Component without harness connected

      (Front Speed Sensor)
      *b Sensor Housing

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

      Standard resistance
      Tester Connection Condition Specified Condition
      1 - 2 20°C (68°F) 0.9 to 1.3 kΩ
      1 - Sensor housing Always 10 MΩ or higher
      2 - Sensor housing Always 10 MΩ or higher

    3. Reinstall the front speed sensor.


    NG

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    OK

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


    1. Turn the ignition switch off.

    2. Disconnect the B9 skid control ECU (brake actuator assembly) connector.

    3. Disconnect the F26 and/or F25 front speed sensor connector.

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

      Standard Resistance
      RH
      Tester Connection Condition Specified Condition
      B9-6 (FR+) - F26-1 (FR+) Always Below 1 Ω
      B9-7 (FR-) - F26-2 (FR-) Always Below 1 Ω
      B9-6 (FR+) or F26-1 (FR+) - Body ground Always 10 kΩ or higher
      B9-7 (FR-) or F26-2 (FR-) - Body ground Always 10 kΩ or higher
      LH
      Tester Connection Condition Specified Condition
      B9-19 (FL+) - F25-1 (FL+) Always Below 1 Ω
      B9-18 (FL-) - F25-2 (FL-) Always Below 1 Ω
      B9-19 (FL+) or F25-1 (FL+) - Body ground Always 10 kΩ or higher
      B9-18 (FL-) or F25-2 (FL-) - Body ground Always 10 kΩ or higher

    5. Reconnect the B9 skid control ECU (brake actuator assembly) connector.

    6. Reconnect the F26 and/or F25 front speed sensor connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. 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 recorded 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

  7. REPLACE FRONT SPEED SENSOR


    1. Replace the front speed sensor Click here.


    NEXT

  8. 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 recorded Click here.

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

    B

    Click here

    A

    END

  9. REPLACE FRONT SKID CONTROL ROTOR


    1. Replace the front skid control rotor.


    NEXT

  10. 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 recorded Click here.

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

    B

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    A

    END