VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1271, C1272, C1330, C1331, C1464, C1465

DTC Code DTC Name
C1271 Low Output Signal of Front Speed Sensor RH (Test Mode DTC)
C1272 Low Output Signal of Front Speed Sensor LH (Test Mode DTC)
C1330 Open in Front Speed Sensor RH
C1331 Open in Front Speed Sensor LH
C1464 Front Speed Sensor RH
C1465 Front Speed Sensor LH

DESCRIPTION

Each speed sensor detects wheel speed and sends the appropriate signals to the skid control ECU (brake actuator assembly). These signals are used by the brake control system.

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

Each speed sensor detects that magnetic field change and sends a pulse signal to the skid control ECU (brake actuator assembly).

DTCs C1271 and C1272 are cleared when the speed sensor sends a vehicle speed signal or when Test Mode ends. DTCs C1271 and C1272 are output only in Test Mode.

A004I7DE26
DTC No. DTC Detection Condition Trouble Area

C1330

C1331

 An open or short in the speed sensor signal circuit.

  • Front speed sensor RH/LH

  • Speed sensor circuit

  • Sensor installation

  • Skid control ECU (Brake actuator assembly)

C1464

C1465

 An abnormal signal is received from a wheel speed sensor.

  • Front speed sensor RH/LH

  • Speed sensor circuit

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

  • Sensor installation

  • Skid control ECU (Brake actuator assembly)

C1271

C1272

 Detected only during Test Mode.

  • Front speed sensor RH/LH

  • Sensor installation

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

Tech Tips


  • DTCs C1271, C1330 and C1464 are for the front speed sensor RH.

  • DTCs C1272, C1331 and C1465 are for the front speed sensor LH.

WIRING DIAGRAM

A004HOFE06
*a Front Speed Sensor RH
*b Front Speed Sensor LH
*c Skid Control ECU (Brake Actuator Assembly)

CAUTION / NOTICE / HINT

Note

When replacing the skid control ECU (brake actuator assembly), perform VSC sensor neutral memorization Click here.

PROCEDURE


  1. READ VALUE USING GTS (FRONT SPEED SENSOR)


    1. Connect the GTS to the DLC3.

    2. Start the engine.

    3. Select the Data List using the GTS Click here.

      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.: 326.4 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.: 326.4 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations

    4. Check the speed value output from the speed sensor displayed on the GTS.

      Tech Tips

      Factors that affect the indicated vehicle speed include tire size, tire pressure, 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 GTS is similar to the speed indicated on the speedometer.

    NG

    CHECK FRONT SPEED SENSOR INSTALLATION Click here

    OK

  2. PERFORM TEST MODE INSPECTION (SIGNAL CHECK)


    1. Turn the ignition switch off.

    2. Perform the sensor check using the Test Mode procedure Click here.

      OK
      All Test Mode DTCs are not output.

    NG

    CHECK FRONT SPEED SENSOR INSTALLATION Click here

    OK

  3. RECONFIRM DTC


    1. Clear the DTCs Click here.

    2. Turn the ignition switch off.

    3. Start the engine.

    4. Drive the vehicle at a speed of 45 km/h (28 mph) or more for at least 120 seconds.

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

      Result
      Result Proceed to
      DTCs C1330, C1331, C1464 and C1465 are not output. A
      DTCs C1330, C1331, C1464 and/or C1465 are output. B

    A

    CHECK FOR INTERMITTENT PROBLEMS Click here

    B

    REPLACE FRONT SPEED SENSOR Click here

  4. CHECK FRONT SPEED SENSOR INSTALLATION


    1. A004JNAE89

      Turn the ignition switch off.

    2. Check the speed sensor installation.

      OK
      There is no clearance between the sensor and the steering knuckle.
      The installation bolt is tightened properly.
      Torque
      7.5 N*m (76 kgf*cm, 66 in.*lbf)

    NG

    INSTALL FRONT SPEED SENSOR CORRECTLY Click here

    OK

  5. CHECK FRONT SPEED SENSOR TIP


    1. Remove the front speed sensor Click here.

    2. Check the speed sensor tip.

      OK
      No scratches or foreign matter on the sensor tip.

      Note

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


    NG

    CLEAN OR REPLACE FRONT SPEED SENSOR

    OK

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


    1. Install the front speed sensor Click here.

    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 (brake actuator assembly) 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
      A5-16 (FR+) - A42-2 (FR+) Always Below 1 Ω
      A5-16 (FR+) - Body ground Always 10 kΩ or higher
      A5-4 (FR-) - A42-1 (FR-) Always Below 1 Ω
      A5-4 (FR-) - Body ground Always 10 kΩ or higher
      for LH
      Tester Connection Condition Specified Condition
      A5-19 (FL+) - A12-2 (FL+) Always Below 1 Ω
      A5-19 (FL+) - Body ground Always 10 kΩ or higher
      A5-32 (FL-) - A12-1 (FL-) Always Below 1 Ω
      A5-32 (FL-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. INSPECT BRAKE ACTUATOR ASSEMBLY (FRONT SPEED SENSOR POWER SOURCE TERMINAL)


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

    2. A004JV2E02
      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 Condition Specified Condition
      A42-2 (FR+) - Body ground Ignition switch ON 8 to 14 V
      for LH
      Tester Connection Condition Specified Condition
      A12-2 (FL+) - Body ground Ignition switch ON 8 to 14 V

    NG

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    OK

  8. RECONFIRM DTC


    1. Reconnect the front speed sensor connector.

    2. Clear the DTCs Click here.

    3. Turn the ignition switch off.

    4. Start the engine.

    5. Drive the vehicle at a speed of 45 km/h (28 mph) or more for at least 120 seconds.

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

      Result
      Result Proceed to
      DTCs C1330, C1331, C1464 and/or C1465 are output. A
      DTCs C1330, C1331, C1464 and C1465 are not output. B

    B

    CHECK FOR INTERMITTENT PROBLEMS Click here

    A

  9. REPLACE FRONT SPEED SENSOR


    1. Turn the ignition switch off.

    2. Replace the front speed sensor Click here.

      Note

      Check the speed sensor signal after replacement Click here.


    NEXT

  10. RECONFIRM DTC


    1. Clear the DTCs Click here.

    2. Turn the ignition switch off.

    3. Start the engine.

    4. Drive the vehicle at a speed of 45 km/h (28 mph) or more for at least 120 seconds.

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

      Result
      Result Proceed to
      DTCs C1330, C1331, C1464 and/or C1465 are output. A
      DTCs C1330, C1331, C1464 and C1465 are not output. B

    B

    END

    A

  11. REPLACE FRONT SPEED SENSOR ROTOR


    1. Turn the ignition switch off.

    2. Replace the front speed sensor rotor Click here.

      Tech Tips

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

      Note

      Check the speed sensor signal after replacement Click here.


    NEXT

  12. RECONFIRM DTC


    1. Clear the DTCs Click here.

    2. Turn the ignition switch off.

    3. Start the engine.

    4. Drive the vehicle at a speed of 45 km/h (28 mph) or more for at least 120 seconds.

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

      Result
      Result Proceed to
      DTCs C1330, C1331, C1464 and/or C1465 are output. A
      DTCs C1330, C1331, C1464 and C1465 are not 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 Click here.


    A

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    B

    END