VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1413,C1275,C1276 and 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 No.

Detection Item

DTC Detection Condition

Trouble Area

C1275

Abnormal Change in Output Signal of Front Speed Sensor RH (Test Mode DTC)

Stored only during test mode.

  • Front speed sensor RH/LH

  • Speed sensor rotor

C1276

Abnormal Change in Output Signal of Front Speed Sensor LH (Test Mode DTC)

Stored only during test mode.

  • Front speed sensor RH/LH

  • Speed sensor rotor

C1413

Front Speed Sensor RH Output Malfunction

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

  • Skid control sensor wire

  • Speed sensor circuit

  • Speed sensor rotor

  • Master cylinder solenoid (Skid control ECU)

C1414

Front Speed Sensor LH Output Malfunction

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

  • Skid control sensor wire

  • Speed sensor circuit

  • Speed sensor rotor

  • Master cylinder solenoid (Skid control ECU)
Tip:

  • 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).

CAUTION / NOTICE / HINT

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

      Chassis > ABS/VSC/TRC > Data List

      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).

      Tip:

      Perform the above inspection before removing the sensor and connector.

      Result

      Result

      OK

      NG
    NG

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

    OK

  2. READ VALUE USING INTELLIGENT TESTER (FRONT SPEED SENSOR)

    1. Turn the engine 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.

      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)

      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.

      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, 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).

      Result

      Result

      OK

      NG
    NG

    CHECK FRONT SPEED SENSOR INSTALLATIONClick here

    OK

  3. PERFORM TEST MODE (SIGNAL CHECK)

    1. Turn the engine switch off.

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

      Click here

      OK

      All test mode DTCs are cleared.

      Result

      Result

      OK

      NG

      Chassis > ABS/VSC/TRC > Utility

      Tester Display

      Test Mode
    NG

    CHECK FRONT SPEED SENSOR INSTALLATIONClick here

    OK

  4. RECONFIRM DTC

    1. Turn the engine switch off.

    2. Clear the DTCs.

      Click here

      Chassis > ABS/VSC/TRC > Clear DTCs

    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 output.

      Click here

      Result

      Result

      Proceed to

      DTC is not output

      A

      DTC is output

      B

      Chassis > ABS/VSC/TRC > Trouble Codes

    A

    USE SIMULATION METHOD TO CHECK

    Click here

    B

    REPLACE FRONT SPEED SENSORClick here

  5. CHECK FRONT SPEED SENSOR INSTALLATION

    1. Turn the engine switch off.

    2. C144929C01

      *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.

      Result

      Result

      OK

      NG
    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.

      Result

      Result

      OK

      NG
    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.

      Tip:

      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.

      Result

      Result

      OK

      NG
    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. C214500C01

      *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

      Table 1. 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
      Table 2. 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

      Result

      Result

      OK

      NG
    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

      Table 3. 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
      Table 4. 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

      Result

      Result

      OK

      NG
    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. C207217C01

      *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

      Table 5. for RH

      Tester Connection

      Switch Condition

      Specified Condition

      p1-2 (FR+) - Body ground

      Engine switch on (IG)

      11 to 14 V
      Table 6. for LH

      Tester Connection

      Switch Condition

      Specified Condition

      p2-2 (FL+) - Body ground

      Engine switch on (IG)

      11 to 14 V

      Result

      Result

      OK

      NG
    NG

    REPLACE MASTER CYLINDER SOLENOID

    Click here

    OK

  11. RECONFIRM DTC

    1. Turn the engine switch off.

    2. Clear the DTCs.

      Click here

      Chassis > ABS/VSC/TRC > Clear DTCs

    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 output.

      Click here

      Result

      Result

      Proceed to

      DTC is not output

      A

      DTC is output

      B

      Chassis > ABS/VSC/TRC > Trouble Codes

    A

    USE SIMULATION METHOD TO CHECK

    Click here

    B

  12. REPLACE FRONT SPEED SENSOR

    1. Replace the front speed sensor.

      Click here

      Result

      Result

      NEXT
    NEXT

  13. RECONFIRM DTC

    1. Clear the DTCs.

      Click here

      Chassis > ABS/VSC/TRC > Clear DTCs

    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

      Chassis > ABS/VSC/TRC > Trouble Codes

    A

    END

    B

    REPLACE FRONT AXLE WITH ABS ROTOR BEARING ASSEMBLY

    Click here