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 ECM receives a deceleration sensor signal from the brake actuator assembly via CAN communication.

    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. Condition 2 is determined for 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. Condition 2 is determined for 3.0 seconds or more.

  4. 1-trip detection logic

WIRING DIAGRAM

A005L11E01
*a DECELERATION SENSOR
*b SKID CONTROL ECU
*c CAN communication line

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 (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    A

  2. READ VALUE USING INTELLIGENT TESTER


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the tester on.

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

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

      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


      • Vehicle on level ground: 2.31 to 2.69 V

      • Decelerating: 0.5 to 2.5 V

      • Accelerating: 2.5 to 4.5 V

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

    B

    REPLACE DECELERATION SENSOR Click here

    A

  3. CHECK DTC OUTPUT


    1. Clear the DTCs Click here.

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

    3. Connect the intelligent tester to the DLC3.

    4. Turn the ignition switch to ON.

    5. Turn the tester on.

    6. Enter the following menus: Powertrain / Engine and ECT / DTC / Current or Pending.

    7. Read the DTCs using the tester.

      Result
      Result Proceed to
      P1586 is output A
      P1586 is not output B

      Tech Tips

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


    A

    REPLACE BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU) Click here

    B

    CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) Click here

  4. REPLACE DECELERATION SENSOR


    1. Replace the deceleration sensor Click here.


    NEXT

  5. PERFORM INITIALIZATION

    Note


    • Performing reset memory will clear the learned values of both the yaw rate sensor (deceleration sensor 0 point calibration) and CVT oil pressure (CVT oil pressure calibration). Make sure to perform reset memory, yaw rate sensor 0 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

      • Skid control computer

      • Oil pressure sensor

      • Deceleration sensor

    • After performing reset memory, always perform yaw rate sensor (deceleration sensor 0 point) calibration first, and then CVT oil pressure calibration.

    • Always perform 0 point calibration with the vehicle on level ground.

    • Do not shake or vibrate the vehicle during 0 point calibration.


    1. Using the intelligent tester, perform reset memory, deceleration sensor 0 point calibration and CVT oil pressure calibration Click here.

    2. Check that no DTC is stored.


    NEXT

    END