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VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1415, C1416

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DTC Code DTC Name
C1415 Rear Speed Sensor RH Circuit Output
C1416 Rear Speed Sensor LH Circuit Output
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DESCRIPTION

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

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

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

Tip:

When the connectors between the speed sensor and skid control ECU (brake actuator assembly) are connected, the following waveform is output.

Tip:

Check the connection status between the sensor connector and the vehicle wire harness.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1415 Rear Speed Sensor RH Circuit Output

Any of the following is detected:


  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

  • Wire harness or connector

  • Rear speed sensor RH installation

  • Rear speed sensor rotor RH (rear axle hub and bearing assembly RH)

  • Skid control ECU (brake actuator assembly)
C1416 Rear Speed Sensor LH Circuit Output

Any of the following is detected:


  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 LH

  • Wire harness or connector

  • Rear speed sensor LH installation

  • Rear speed sensor rotor LH (rear axle hub and bearing assembly LH)

  • Skid control ECU (brake actuator assembly)
Tip:

for C1415 and C1416: Even after the trouble areas are repaired, the ABS warning light will not go off unless the following operations are performed.


  1. Drive the vehicle at 30 km/h (19 mph) for 30 seconds or more and check that the ABS warning light goes off.

  2. Clear the DTCs.

Tip:

  • DTC C1415 is for the rear speed sensor RH.

  • DTC C1416 is for the rear speed sensor LH.

Table 1. *a Rear Speed Sensor RH *b Rear Speed Sensor LH *c Skid Control ECU (Brake Actuator Assembly)
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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note:

When replacing the skid control ECU (brake actuator assembly), perform zero point calibration and store system information.

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PROCEDURE


  1. Click here

    CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION)


    1. Using the GTS, check for any momentary interruption in the wire harness and connector corresponding to a DTC.

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      1. Chassis > ABS/VSC/TRC > Data List
        Tester Display Measurement Item Range Normal Condition Diagnostic Note
        RR Speed Open Rear speed sensor RH open detection Error or Normal

        Error: Momentary interruption

        Normal: Normal

        		 -
        RL Speed Open Rear speed sensor LH open detection Error or Normal

        Error: Momentary interruption

        Normal: Normal

        		 -




      1. Chassis > ABS/VSC/TRC > Data List
        Tester Display
        RR Speed Open
        RL Speed Open





      OK
      Normal (There are no momentary interruptions.)
      Tip:

      Perform the above inspection before removing the sensor and connector.

      Result
      Proceed to
      OK
      NG

  2. Click here

    READ VALUE USING GTS (REAR SPEED SENSOR)


    1. Select the Data List using the GTS.

      Click here


      1. Chassis > ABS/VSC/TRC > Data List
        Tester Display Measurement Item Range Normal Condition Diagnostic Note
        RR Wheel Speed Rear wheel speed sensor RH reading Min.: 0 km/h (0 mph), Max.: 326.4 km/h (203 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations
        RL Wheel Speed Rear wheel speed sensor LH reading Min.: 0 km/h (0 mph), Max.: 326.4 km/h (203 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations




      1. Chassis > ABS/VSC/TRC > Data List
        Tester Display
        RR Wheel Speed
        RL Wheel Speed





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

      Tip:

      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.

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      OK
      The speed value output from the speed sensor displayed on the GTS is similar to the speed indicated on the speedometer.
      Result
      Proceed to
      OK
      NG

  3. Click here

    RECONFIRM DTC


    1. Turn the engine switch off.

    2. Clear the DTCs.

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      1. Chassis > ABS/VSC/TRC > Clear DTCs


    3. Turn the engine switch off.

    4. Start the engine.

    5. Perform a road test.

    6. Check if the same DTC is output.

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      1. Chassis > ABS/VSC/TRC > Trouble Codes


      Result
      Result Proceed to
      DTCs C1415 and C1416 are not output. A
      DTCs C1415 and/or C1416 are output. B
      Tip:

      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.

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  4. Click here

    CHECK REAR SPEED SENSOR INSTALLATION


    1. B00673MC10
      *1 Rear Speed Sensor
      *a Correct
      *b Incorrect
      *c 8.5 Nm
      *d No clearance

      Turn the engine switch off.

    2. Check the speed sensor installation.

      OK
      There is no clearance between the sensor and rear axle carrier.
      The installation bolt is tightened properly.
      Torque
      8.5 N*m (87 kgf*cm, 75 in.*lbf)
      Result
      Proceed to
      OK
      NG

  5. Click here

    CHECK REAR SPEED SENSOR AND SENSOR ROTOR


    1. Remove the rear speed sensor and the component with the sensor rotor.

      for Speed Sensor:Click here

      for Sensor Rotor:Click here

    2. Check the speed sensor tip and speed sensor rotor.

      OK
      No scratches, oil, or foreign matter on the sensor tip and rotor.
      Note:

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

        If there are any ferrous metal filings stuck to the rotor, this will result in a malfunction, so confirm that the rotor is not contaminated with foreign matter before replacing the sensor.

      • Check the speed sensor signal after cleaning or replacement.

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      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      CLEAN OR REPLACE REAR SPEED SENSOR OR COMPONENT WITH SENSOR ROTOR

  6. Click here

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


    1. Reinstall the rear speed sensor and the component with the sensor rotor.

      for Speed Sensor:Click here

      for Sensor Rotor:Click here

    2. Make sure that there is no looseness at the locking part and the connecting part of the connector.

    3. Disconnect the A86 skid control ECU (brake actuator assembly) connector.

    4. Disconnect the T16 or U24 rear speed sensor connector.

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

      Standard Resistance
      Table 2. for RH
      Tester Connection Condition Specified Condition
      A86-16 (RR+) - T16-1 (RR+) Always Below 1 Ω
      A86-16 (RR+) or T16-1 (RR+) - Body ground Always 10 kΩ or higher
      A86-15 (RR-) - T16-2 (RR-) Always Below 1 Ω
      A86-15 (RR-) or T16-2 (RR-) - Body ground Always 10 kΩ or higher
      Table 3. for LH
      Tester Connection Condition Specified Condition
      A86-29 (RL+) - U24-1 (RL+) Always Below 1 Ω
      A86-29 (RL+) or U24-1 (RL+) - Body ground Always 10 kΩ or higher
      A86-28 (RL-) - U24-2 (RL-) Always Below 1 Ω
      A86-28 (RL-) or U24-2 (RL-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  7. Click here

    INSPECT BRAKE ACTUATOR ASSEMBLY (SENSOR POWER SUPPLY OUTPUT)


    1. B00678LC13
      *A for RH
      *B for LH
      *a

      Front view of wire harness connector

      (to Rear Speed Sensor)

      Reconnect the A86 skid control ECU (brake actuator assembly) connector.

    2. Turn the engine switch on (IG).

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

      Standard Voltage
      Table 4. for RH
      Tester Connection Condition Specified Condition
      T16-1 (RR+) - Body ground Engine switch on (IG) 8 to 14 V
      Table 5. for LH
      Tester Connection Condition Specified Condition
      U24-1 (RL+) - Body ground Engine switch on (IG) 8 to 14 V
      Note:

      Check the speed sensor signal after replacement.

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      Tip:

      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.

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      Result
      Proceed to
      OK
      NG