ANTI-LOCK BRAKE SYSTEM, Diagnostic DTC:C1277, C1278, C1415, C1416

DTC Code DTC Name
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)
C1415 Rear Speed Sensor RH Output Malfunction
C1416 Rear Speed Sensor LH Output Malfunction

DESCRIPTION

Refer to DTCs C1273, C1274, C1403 and C1404 Click here.

DTC No. DTC Detection Condition Trouble Area

C1415

C1416

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 (31 mph) 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

  • Rear speed sensor RH/LH

  • Rear speed sensor installation

  • Rear skid control rotor RH/LH

  • Brake actuator assembly

C1277

C1278

 Detected only during Test Mode.

  • Rear speed sensor RH/LH

  • Rear skid control rotor RH/LH

Tech Tips


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

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

WIRING DIAGRAM

Refer to DTCs C1273, C1274, C1403 and C1404 Click here.

INSPECTION PROCEDURE

Note

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

PROCEDURE


  1. CHECK REAR SPEED SENSOR INSTALLATION


    1. Turn the ignition switch off.

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

      Check the rear speed sensor installation.

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

    NG

    INSTALL REAR SPEED SENSOR CORRECTLY Click here

    OK

  2. INSPECT REAR SPEED SENSOR TIP


    1. Remove the rear speed sensor Click here.

    2. Check the rear speed sensor tip.

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

      Note

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

    3. Reinstall the rear speed sensor.


    NG

    CLEAN OR REPLACE REAR SPEED SENSOR Click here

    OK

  3. INSPECT REAR SKID CONTROL ROTOR


    1. Remove the rear skid control rotor Click here.

    2. Check the rear skid control rotor.

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

    3. Reinstall the rear skid control rotor.


    NG

    CLEAN OR REPLACE REAR SKID CONTROL ROTOR Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - REAR SPEED SENSOR)


    1. Turn the ignition switch off.

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

    3. Disconnect the R12 and/or R11 rear speed sensor connector.

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

      Standard Resistance
      RH
      Tester Connection Condition Specified Condition
      B9-16 (RR+) - R12-2 (RR+) Always Below 1 Ω
      B9-17 (RR-) - R12-1 (RR-) Always Below 1 Ω
      B9-16 (RR+) or R12-2 (RR+) - Body ground Always 10 kΩ or higher
      B9-17 (RR-) or R12-1 (RR-) - Body ground Always 10 kΩ or higher
      LH
      Tester Connection Condition Specified Condition
      B9-5 (RL+) - R11-2 (RL+) Always Below 1 Ω
      B9-4 (RL-) - R11-1 (RL-) Always Below 1 Ω
      B9-5 (RL+) or R11-2 (RL+) - Body ground Always 10 kΩ or higher
      B9-4 (RL-) or R11-1 (RL-) - Body ground Always 10 kΩ or higher

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


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT BRAKE ACTUATOR ASSEMBLY (SENSOR INPUT)


    1. A01CH5EE03
      Text in Illustration
      *a

      Front view of wire harness connector

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

      Turn the ignition switch to ON.

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

      Standard Voltage
      RH
      Tester Connection Switch Condition Specified Condition
      R12-2 (RR+) - Body ground Ignition switch ON 8 to 17 V
      LH
      Tester Connection Switch Condition Specified Condition
      R11-2 (RL+) - Body ground Ignition switch ON 8 to 17 V

    3. Reconnect the R12 and/or R11 rear speed sensor connector.


    NG

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    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 REAR SPEED SENSOR


    1. Replace the rear 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 REAR SKID CONTROL ROTOR


    1. Replace the rear skid control rotor Click here.


    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