VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1415, C1277, C1278, C1416

DTC Code DTC Name
C1415 Rear Speed Sensor RH Output Malfunction
C1277 Abnormal Change in Output Signal of Rear Speed Sensor RH (Test Mode DTC)
C1278 Abnormal Change in Output Signal of Rear Speed Sensor LH (Test Mode DTC)
C1416 Rear Speed Sensor LH Output Malfunction

DESCRIPTION

Refer to DTCs C1401 and C1402 Click here.

DTC Code DTC Detection Condition Trouble Area

C1415

C1416

One of the following conditions is met:


  1. An open in the sensor signal circuit occurs 255 times or more.

  2. At a vehicle speed of 20 km/h (12 mph) or more, noise occurs in the sensor signals 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.

  • Rear speed sensor RH/LH

  • Speed sensor circuit

  • Rear skid control rotor RH/LH

  • Skid control ECU (Brake actuator assembly)

C1277

C1278

 Stored during Test Mode.

  • Rear speed sensor RH/LH

  • Rear skid control rotor RH/LH

Tech Tips


  • DTCs C1415 and C1277 are for the rear speed sensor RH.

  • DTCs C1416 and C1278 are for the rear speed sensor LH.

WIRING DIAGRAM

Refer to DTCs C1407 and C1408 Click here.

INSPECTION PROCEDURE

Note


  • After replacing the brake actuator assembly, perform calibration Click here.

  • Check the speed sensor signal after replacement Click here.

  • Before disconnecting the connector, make sure that there are no problems with the connection.

  • After disconnecting the connector, make sure that the connector case and terminals are not deformed or corroded.

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
      RR Speed Open Rear speed sensor RH open circuit detection / Error or Normal Normal -
      RL Speed Open Rear speed sensor LH open circuit detection / Error or Normal Normal -
      OK
      Normal (there are no momentary interruptions).

      Tech Tips

      Perform the above inspection before removing the sensor or disconnecting a connector.


    NG

    Click here

    OK

  2. READ VALUE USING INTELLIGENT TESTER (RR/RL 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, and then drive the vehicle.

      ABS/VSC/TRC
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      RR Wheel Speed Rear 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.
      RL Wheel Speed Rear 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 the speed value output from the speed sensor displayed on the intelligent tester.

      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. Perform the signal 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. Turn the ignition switch off.

    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 for LHD B
      for RHD C

      Tech Tips

      If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next suspected area Click here.


    B

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    C

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    A

    USE SIMULATION METHOD TO CHECK Click here

  5. CHECK REAR SPEED SENSOR INSTALLATION


    1. Turn the ignition switch off.

    2. A01E1N8E11
      Text in Illustration
      *1 Rear Speed Sensor
      *a No clearance
      *b CORRECT
      *c INCORRECT

      Check the speed sensor installation Click here.

      OK
      The installation bolt is tightened properly.
      There is no clearance between the sensor and rear axle housing.

    NG

    INSTALL REAR SPEED SENSOR CORRECTLY

    OK

  6. INSPECT REAR SPEED SENSOR TIP


    1. Turn the ignition switch off.

    2. Remove the rear speed sensor Click here.

    3. Check the speed sensor tip.

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

      Note

      Do not replace the speed sensor if no damage to the speed sensor tip is found.

      Tech Tips


      • If the sensor is contaminated with oil or other foreign material, clean the sensor.

      • If there is iron powder sticking to the rotor, this will result in a malfunction. Therefore, confirm that the rotor is not contaminated with foreign material before replacing the sensor.


    NG

    CLEAN OR REPLACE REAR SPEED SENSOR

    OK

  7. INSPECT REAR SKID CONTROL ROTOR


    1. Turn the ignition switch off.

    2. Remove the rear axle shaft with backing plate Click here.

    3. Check the rear skid control rotor.

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

    NG

    CLEAN OR REPLACE REAR SKID CONTROL ROTOR

    OK

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


    1. Turn the ignition switch off.

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

    3. Disconnect the 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
      S35-17 (RR+) - S41-2 Always Below 1 Ω
      S35-17 (RR+) - Body ground Always 10 kΩ or higher
      S35-16 (RR-) - S41-1 Always Below 1 Ω
      S35-16 (RR-) - Body ground Always 10 kΩ or higher
      for LH
      Tester Connection Condition Specified Condition
      S35-5 (RL+) - S40-2 Always Below 1 Ω
      S35-5 (RL+) - Body ground Always 10 kΩ or higher
      S35-4 (RL-) - S40-1 Always Below 1 Ω
      S35-4 (RL-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. CHECK TERMINAL VOLTAGE (SENSOR POWER SUPPLY VOLTAGE TERMINAL)


    1. Turn the ignition switch off.

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

    3. Disconnect the speed sensor connector.

    4. A01E0DKE03
      Text in Illustration
      *A for RH
      *B for LH
      *a

      Front view of wire harness connector

      (to Rear Speed Sensor)

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

      Standard Voltage
      for RH
      Tester Connection Switch Condition Specified Condition
      S41-2 - Body ground Ignition switch ON 8 to 14 V
      for LH
      Tester Connection Switch Condition Specified Condition
      S40-2 - Body ground Ignition switch ON 8 to 14 V
      Result
      Result Proceed to
      OK A
      NG for LHD B
      for RHD C

    B

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    C

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    A

  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 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

    B

    Click here

    A

    USE SIMULATION METHOD TO CHECK Click here

  11. REPLACE REAR SPEED SENSOR


    1. Turn the ignition switch off.

    2. Replace the rear speed sensor 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 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

    B

    REPLACE REAR SKID CONTROL ROTOR Click here

    A

    END