VEHICLE STABILITY CONTROL SYSTEM (for Hydraulic Brake Booster), 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 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.

  • Rear speed sensor RH/LH

  • Rear skid control sensor wire

  • Speed sensor circuit

  • Rear speed sensor rotor RH/LH

  • Master cylinder solenoid (Skid control ECU)

C1277

C1278

 Stored only during test mode.

  • Rear speed sensor RH/LH

  • Rear speed sensor 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


  • 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.

      ABS/VSC/TRC
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      RR Speed Open Rear speed sensor RH open detection/ Error or Normal Normal -
      RL Speed Open Rear speed sensor LH open detection/ Error or Normal Normal -
      OK
      Normal (there are no momentary interruptions).

      Tech Tips

      Perform the above inspection before removing the sensor and 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.

      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 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.

      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, see 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. Turn the ignition switch to ON.

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

      OK
      All test mode DTCs are cleared.

    NG

    Click here

    OK

  4. RECONFIRM DTC


    1. Turn the ignition switch to ON.

    2. Clear the DTC Click here.

    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

  5. CHECK REAR SPEED SENSOR INSTALLATION


    1. Turn the ignition switch off.

    2. A00O4Y5E49
      Text in Illustration
      *1 Rear 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 rear axle.
      The installation nut is tightened properly.

    NG

    INSTALL REAR SPEED SENSOR CORRECTLY

    OK

  6. INSPECT REAR SPEED SENSOR TIP


    1. Remove the rear 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.


    NG

    CLEAN OR REPLACE REAR SPEED SENSOR

    OK

  7. INSPECT REAR SPEED SENSOR ROTOR


    1. Remove the rear axle hub and bearing assembly Click here.

    2. Check the speed sensor rotor.

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

      Tech Tips

      The rear speed sensor rotor is incorporated into the rear axle hub and bearing assembly.

      If the rear speed sensor rotor needs to be replaced, replace it together with the rear axle hub and bearing assembly.


    NG

    CLEAN OR REPLACE REAR SPEED SENSOR ROTOR

    OK

  8. INSPECT SKID CONTROL SENSOR WIRE

    A00O60CE04
    Text in Illustration
    *A for RH *B for LH
    *1 Skid Control Sensor Wire - -

    1. Remove the skid control sensor wire Click here.

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

      Standard Resistance
      for RH
      Tester Connection Condition Specified Condition
      Sq1-4 - q1-2 (RR+) Always Below 1 Ω
      Sq1-3 - q1-1 (RR-) Always Below 1 Ω
      Sq1-4 - Sq1-3 Always 10 kΩ or higher
      Sq1-4 - Sq1-1 Always 10 kΩ or higher
      Sq1-4 - Sq1-2 Always 10 kΩ or higher
      for LH
      Tester Connection Condition Specified Condition
      Sq1-2 - q2-2 (RL+) Always Below 1 Ω
      Sq1-1 - q2-1 (RL-) Always Below 1 Ω
      Sq1-2 - Sq1-1 Always 10 kΩ or higher
      Sq1-2 - Sq1-3 Always 10 kΩ or higher
      Sq1-2 - Sq1-4 Always 10 kΩ or higher

    NG

    REPLACE SKID CONTROL SENSOR WIRE Click here

    OK

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


    1. Install the skid control sensor wire.

    2. Disconnect the A7 skid control ECU connector.

    3. Disconnect the q1 and/or q2 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
      A7-5 (RR+) - q1-2 (RR+) Always Below 1 Ω
      A7-5 (RR+) - Body ground Always 10 kΩ or higher
      A7-19 (RR-) - q1-1 (RR-) Always Below 1 Ω
      A7-19 (RR-) - Body ground Always 10 kΩ or higher
      for LH
      Tester Connection Condition Specified Condition
      A7-20 (RL+) - q2-2 (RL+) Always Below 1 Ω
      A7-20 (RL+) - Body ground Always 10 kΩ or higher
      A7-6 (RL-) - q2-1 (RL-) Always Below 1 Ω
      A7-6 (RL-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. CHECK TERMINAL VOLTAGE (RR+, RL+)


    1. Disconnect the q1 and/or q2 speed sensor connector.

    2. Connect the A7 skid control ECU connector.

    3. A00O564E08
      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
      q1-2 (RR+) - Body ground Ignition switch ON 11 to 14 V
      for LH
      Tester Connection Switch Condition Specified Condition
      q2-2 (RL+) - Body ground Ignition switch ON 11 to 14 V
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE MASTER CYLINDER SOLENOID Click here

    C

    REPLACE MASTER CYLINDER SOLENOID Click here

    A

  11. RECONFIRM DTC


    1. Turn the ignition switch to ON.

    2. Clear the DTCs Click here.

    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

  12. REPLACE REAR SPEED SENSOR


    1. Replace the rear speed sensor Click here.


    NEXT

  13. RECONFIRM DTC


    1. Turn the ignition switch to ON.

    2. Clear the DTCs Click here.

    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 AXLE HUB AND BEARING ASSEMBLY Click here

    A

    END