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 airbag sensor assembly (yaw rate and acceleration sensor). If a malfunction is determined in the airbag sensor assembly (yaw rate and acceleration 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 airbag sensor assembly (yaw rate and acceleration 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. Detection Item DTC Detection Condition Trouble Area MIL Memory
P1586 Acceleration Sensor Malfunction

  1. Diagnosis Condition


    • The ignition switch is ON.

  2. Malfunction Status


    • At a 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. Malfunction Time


    • 3 seconds or more

  4. Other


    • 1-trip detection logic


  1. Diagnosis Condition


    • The ignition switch is ON.

  2. Malfunction Status


    • The airbag sensor assembly (yaw rate and acceleration 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. Malfunction Time


    • 3 seconds or more

  4. Other


    • 1-trip detection logic

  • Airbag sensor assembly (Yaw rate and acceleration sensor)

  • Brake actuator assembly (Skid control ECU)

  • CAN communication system

 Does not come on DTC stored

WIRING DIAGRAM

Refer to DTC P1585

Click here

PROCEDURE


  1. CHECK DTC OUTPUT


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Check for DTCs.

      Click here


      Powertrain > Engine and ECT > Trouble Codes
      Result
      Result Proceed to
      DTC U0129 is not output A
      DTC U0129 is output B

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

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


    1. Connect the GTS to the DLC3.

    2. Turn the GTS on.

    3. Turn the ignition switch to ON.

    4. Clear the DTCs.


      Powertrain > Engine and ECT > Clear DTCs

    5. 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.

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


      Powertrain > Engine and ECT > Trouble Codes

    7. Read the DTCs using the GTS.

      Tech Tips

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

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

    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 / Primary.

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


      Powertrain > Engine and ECT > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      G Sensor Converted output voltage of yaw rate and acceleration sensor

      min.: 0 V

      max.: 5 V

      Displays converted voltage of yaw rate and acceleration 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 display is not within Normal Condition range A
      Data display is within Normal Condition range B

    B

    REPLACE BRAKE ACTUATOR BRACKET ASSEMBLY Click here

    A

  4. REPLACE AIR BAG SENSOR ASSEMBLY (YAW RATE SENSOR)


    1. Replace the airbag sensor assembly (yaw rate sensor).

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  5. PERFORM INITIALIZATION

    Note


    • Performing Reset Memory will clear the learned value of the yaw rate and acceleration sensor (deceleration sensor zero point calibration) and the CVT oil pressure (CVT oil pressure calibration). Make sure to perform Reset Memory, yaw rate and acceleration 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

      • Oil pressure sensor

      • Airbag sensor assembly (Yaw rate and acceleration sensor)

    • After performing Reset Memory, always perform yaw rate and acceleration sensor (deceleration sensor zero point) calibration first, and then CVT oil pressure calibration.

    • Always perform calibration with the vehicle on level ground.

    • Do not shake or vibrate the vehicle during calibration.


    1. Using the GTS, perform Reset Memory, deceleration sensor zero point calibration and CVT oil pressure calibration.

      Click here

    2. Check for DTCs again.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    END