CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM, Diagnostic DTC:P1586

DTC Code DTC Name
P1586 Acceleration Sensor Malfunction

DESCRIPTION

The ECM determines the vehicle inclination based on a signal from the deceleration sensor to perform neutral control. If a malfunction is determined in the deceleration sensor based on a malfunction signal from the brake actuator assembly, the ECM cancels neutral control as a fail-safe function.

Tech Tips


  • The signal of the deceleration sensor is sent to the brake actuator assembly via the CAN communication system.

  • If CAN communication DTCs are output, perform troubleshooting for those DTCs first.

DTC No.

DTC Detection Condition


  1. Diagnosis Condition

  2. Malfunction Status

  3. Malfunction Time

  4. Other

 Trouble Area
P1586

  1. Ignition switch ON

  2. With the vehicle speed 30 km/h (18 mph) or more, the difference between longitudinal G calculated based on the G sensor value and longitudinal G calculated based on the vehicle speed exceeds 0.35 G for 60 seconds or more.

  3. 3.0 seconds or more.

  4. 1 trip detection logic

  • Deceleration sensor

  • Brake actuator assembly

    (Skid control ECU)

  • CAN communication system

  1. Ignition switch ON

  2. The deceleration sensor signal does not change 16 times or more while the vehicle speed decreases from 30 km/h (18 mph ) to 0 km/h.

  3. 3.0 seconds or more.

  4. 1 trip detection logic

WIRING DIAGRAM

Refer to P1585 Click here.

PROCEDURE


  1. CHECK DTC OUTPUT (CAN COMMUNICATION SYSTEM)


    1. Check for DTCs of the CAN communication system Click here.

      Result
      Result Proceed to
      DTCs are not output A
      DTCs are output B

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

  2. CHECK DTC OUTPUT (IN ADDITION TO DTC P1586)


    1. Clear the DTCs Click here.

    2. Perform a road test where the vehicle is driven at 30 km/ h (18 mph) or more and the brakes are applied at least 16 times until the vehicle is finally stopped.

    3. Connect the GTS to the DLC3.

    4. Turn the ignition switch to ON.

    5. Turn the GTS on.

    6. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

    7. Read the DTCs using the GTS.

      Result
      Result Proceed to
      Only P1586 is output A
      P1586 and other DTCs are output B

      Tech Tips

      If any other DTCs besides DTC P1586 are output, perform troubleshooting for those DTCs first.


    B

    GO TO DTC CHART Click here

    A

  3. READ VALUE USING GTS (G SENSOR)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine and ECT / Data List.

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

      Engine and ECT
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      G sensor

      Converted output voltage of deceleration sensor/

      min.: 0 V

      max.: 5 V

      Displays converted voltage of deceleration sensor


      • 2.31 V to 2.69 V: Vehicle on level ground

      • 1.88 V to 2.5 V: Decelerating

      • 2.5 V to 3.11 V: Accelerating

      • Set to 1.87 V: G sensor malfunction

      • Set to 1.87 V: Communication malfunction

      		 -
      Result
      Result Proceed to
      Data displayed is not within Normal Condition range A
      Data displayed is within Normal Condition range B

    B

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    A

  4. REPLACE DECELERATION SENSOR


    1. Replace the deceleration sensor Click here.


    NEXT

  5. PERFORM INITIALIZATION

    Note


    • Performing reset memory/initialization will clear the learned value of the deceleration sensor (deceleration sensor zero point calibration) and the CVT oil pressure (CVT oil pressure calibration). Make sure to perform reset memory, deceleration sensor zero point calibration, and CVT oil pressure calibration when replacing any of the parts shown in the following table:

      Replaced Part

      • Continuously variable transaxle assembly

      • ECM

      • Brake actuator assembly (Skid control ECU)

      • Oil pressure sensor

      • Deceleration sensor

    • After reset memory, always perform deceleration sensor (deceleration sensor zero point) calibration first, and then the CVT oil pressure calibration.

    • Always perform the zero point calibration with the vehicle on level ground.

    • Do not shake or vibrate the vehicle during the zero point calibration.


    1. Using the GTS, perform the reset memory, deceleration sensor zero point calibration and CVT oil pressure calibration Click here.

    2. Check for DTCs again Click here.


    NEXT

    END

  6. REPLACE BRAKE ACTUATOR ASSEMBLY


    1. Replace the brake actuator assembly (skid control ECU) Click here.


    NEXT

  7. PERFORM INITIALIZATION

    Note


    • Performing reset memory/initialization will clear the learned value of the deceleration sensor (deceleration sensor zero point calibration) and the CVT oil pressure (CVT oil pressure calibration). Make sure to perform reset memory, deceleration sensor zero point calibration, and CVT oil pressure calibration when replacing any of the parts shown in the following table:

      Replaced Part

      • Continuously variable transaxle assembly

      • ECM

      • Brake actuator assembly (Skid control ECU)

      • Oil pressure sensor

      • Deceleration sensor

    • After reset memory, always perform deceleration sensor (deceleration sensor zero point) calibration first, and then the CVT oil pressure calibration.

    • Always perform the zero point calibration with the vehicle on level ground.

    • Do not shake or vibrate the vehicle during the zero point calibration.


    1. Using the GTS, perform the reset memory, deceleration sensor zero point calibration and CVT oil pressure calibration Click here.

    2. Check for DTCs again Click here.


    NEXT

    END