ANTI-LOCK BRAKE SYSTEM, Diagnostic DTC:C1271, C1272, C1275, C1276, 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)
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)
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

The speed sensors detect the wheel speeds and send appropriate signals to the skid control ECU.

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

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

Tech Tips

When the connectors between the speed sensor and skid control ECU are connected, the following waveform is output.

A01VHPTE02
Text in Illustration
*1 Speed Sensor *2 Speed Sensor Rotor
*a

Waveform (Reference):

Between Speed Sensor (-) and Body Ground

 *b Low speed
*c High speed - -
DTC No. DTC Detection Condition Trouble Area

C1330

C1331

 Open in front speed sensor circuit continues for 0.15 seconds or more.

  • Front speed sensor RH/LH

  • Speed sensor circuit

  • Sensor installation

C1464

C1465

When any of following conditions detected:


  1. When vehicle speed 15 km/h (9 mph), wheel speed 2 km/h (1 mph) or less.

  2. At vehicle speed of 45 km/h (28 mph) or more, open in sensor harness occurs intermittently for 0.2 seconds or more.

  3. When vehicle speed between 10 km/h (6 mph) and 15 km/h (9 mph) for 3 minutes, one wheel speed 2 km/h (1 mph) or less.

  4. Pressure reduction mode of ABS system lasts for 28 seconds or more.

  5. When vehicle driven at speed of 20 km/h (12 mph) or more, difference between wheel speeds indicated by two sensors twice or more for 30 seconds or more.

  6. Foreign matter adheres to sensor rotor.

  • Front speed sensor RH/LH

  • Speed sensor circuit

  • Front axle hub sub-assembly RH/LH

    (front speed sensor rotor RH/LH)

  • Sensor installation

  • Skid control ECU (brake actuator assembly)
Test Mode Diagnosis Code
DTC No. DTC Detection Condition Trouble Area

C1271

C1272

 Detected only during test mode.

  • Front speed sensor RH/LH

  • Sensor installation

  • Front axle hub sub-assembly RH/LH

    (front speed sensor rotor RH/LH)

C1275

C1276

 Detected only during test mode.

  • Front speed sensor RH/LH (open)

  • Front speed sensor circuit (open)

Tech Tips


  • DTCs C1330 and C1464 relate to the front speed sensor RH.

  • DTCs C1331 and C1465 relate to the front speed sensor LH.

WIRING DIAGRAM

A01VM2PE03

CAUTION / NOTICE / HINT

Tech Tips

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

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (FR WHEEL SPEED AND FL WHEEL SPEED)


    1. Connect the intelligent tester to the DLC3.

    2. Start the engine.

    3. Turn the tester on.

    4. Entry the following menu: Chassis / ABS/VSC/TRC / Data List.

    5. In accordance with the display on the tester, read the Data List.

      ABS/VSC/TRC
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      FR Wheel Speed Wheel speed sensor (FR) reading: min.: 0 km/h (0 mph), max.: 326 km/h (202 mph) Similar to speed indicated on speedometer When driving at constant speed: No large fluctuations
      FL Wheel Speed Wheel speed sensor (FL) reading: min.: 0 km/h (0 mph), max.: 326 km/h (202 mph) Similar to speed indicated on speedometer When driving at constant speed: No large fluctuations

    6. Check that there is no significant difference between the speed value displayed on the intelligent tester and the speed value displayed on the speedometer when driving the vehicle.

      OK
      There is almost no difference in the displayed speed values.

      Tech Tips

      There is a tolerance of +/- 10% in the speedometer indication.


    NG

    CHECK FRONT SPEED SENSOR INSTALLATION Click here

    OK

  2. PERFORM TEST MODE INSPECTION (SIGNAL CHECK)


    1. Perform a Test Mode inspection and check for DTCs Click here.

      OK
      No DTC output.

    NG

    CHECK FRONT SPEED SENSOR INSTALLATION Click here

    OK

  3. RECONFIRM DTC


    1. Clear the DTC(s) Click here.

    2. Start the engine.

    3. Drive the vehicle at a speed of 20 km/h (12 mph) or more for at least 60 seconds.

    4. Check if the same DTC(s) is output Click here.

      Result
      Result Proceed to
      DTC not output A
      DTCs C1330, C1331, C1464 and C1465 are not output B

    A

    CHECK FOR INTERMITTENT PROBLEMS Click here

    B

    REPLACE FRONT SPEED SENSOR Click here

  4. CHECK FRONT SPEED SENSOR INSTALLATION


    1. Check that the speed sensor installation bolt is tightened properly.

      OK
      The installation bolt is tightened properly.
      Torque:
      8.0 N*m  { 82 kgf*cm, 71 in.*lbf }

    NG

    TIGHTEN BOLT PROPERLY

    OK

  5. CHECK FRONT SPEED SENSOR


    1. A01VFFSE01
      Text In Illustration
      *a Normal
      *b Abnormal
      *c Clearance

      Visually check the speed sensor for deformation and damage.

      OK
      No deformation or damage.
      There is no gap between the sensor and front steering knuckle.

      Note

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


    NG

    REPLACE FRONT SPEED SENSOR Click here

    OK

  6. CHECK SPEED SENSOR TIP


    1. Remove the speed sensor Click here.

    2. Check the sensor tip.

      OK
      No scratches or foreign matter on the sensor tip.

    NG

    CLEAN OR REPLACE SPEED SENSOR

    OK

  7. INSPECT FRONT SPEED SENSOR ROTOR


    1. Remove the front axle hub sub-assembly 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.

      Tech Tips

      If the front axle hub assembly needs to be replaced, replace it together with the front drive outboard joint shaft assembly.

    3. Reinstall the front axle hub assembly Click here.


    NG

    CLEAN OR REPLACE FRONT SPEED SENSOR ROTOR

    OK

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


    1. Confirm that the skid control ECU connector and speed sensor connector are properly connected.

    2. Disconnect the skid control ECU connector and the front speed sensor connector.

    3. Inspect both the connector case and the terminal for deformation and corrosion.

      OK
      No deformation or corrosion.

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

      Standard Resistance (for LHD with CVT, and RHD)
      Tester Connection Condition Specified Condition
      A78-9 (FL+) - A76-2 (FL+) Always Below 1 Ω
      A78-8 (FL-) - A76-1 (FL-) Always Below 1 Ω
      A78-5 (FR+) - A75-2 (FR+) Always Below 1 Ω
      A78-6 (FR-) - A75-1 (FR-) Always Below 1 Ω
      Standard Resistance (for LHD except CVT)
      Tester Connection Condition Specified Condition
      A79-9 (FL+) - A76-2 (FL+) Always Below 1 Ω
      A79-8 (FL-) - A76-1 (FL-) Always Below 1 Ω
      A79-5 (FR+) - A75-2 (FR+) Always Below 1 Ω
      A79-6 (FR-) - A75-1 (FR-) Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. INSPECT FRONT SPEED SENSOR (INPUT VOLTAGE)


    1. A01VJB7E01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Speed Sensor RH/LH)
      *b LH
      *c RH

      Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A76-2 (FL+) - Body ground Ignition switch ON 7.5 to 15 V
      A75-2 (FR+) - Body ground Ignition switch ON 7.5 to 15 V
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    C

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    A

  10. RECONFIRM DTC


    1. Clear the DTC(s) Click here.

    2. Start the engine.

    3. Drive the vehicle at a speed of 20 km/h (12 mph) or more for at least 60 seconds.

    4. Check if the same DTC(s) is output Click here.

      Result
      Result Proceed to
      DTC output A
      DTC not output B

    B

    CHECK FOR INTERMITTENT PROBLEMS Click here

    A

  11. REPLACE FRONT SPEED SENSOR


    1. Replace the front speed sensor Click here.


    NEXT

  12. RECONFIRM DTC


    1. Clear the DTC(s) Click here.

    2. Start the engine.

    3. Drive the vehicle at a speed of 20 km/h (12 mph) or more for at least 60 seconds.

    4. Check if the same DTC(s) is output Click here.

      Result
      Result Proceed to
      DTC not output A
      DTC output (for LHD) B
      DTC output (for RHD) C

    A

    END

    B

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    C

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here