CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM(for 1ZR-FAE), 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 of the airbag sensor assembly (yaw rate and acceleration sensor) is determined based on a malfunction signal from the brake actuator assembly (skid control ECU), the ECM stores a DTC.

Tech Tips


  • The airbag sensor assembly (yaw rate and acceleration sensor) signal is sent to the brake actuator assembly (skid control ECU) via CAN communication.

  • 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 2. Malfunction Status 3. Malfunction Time 4. Other


    DTC Detection Condition 1

  1. The ignition switch is ON.

  2. At a vehicle speed 30 km/h (19 mph) or more, the difference between longitudinal G calculated based on the airbag sensor assembly (yaw rate and acceleration sensor) (G sensor) value and longitudinal G calculated based on the vehicle speed exceeds 0.35 G for 60 seconds or more.

  3. 3 seconds or more

  4. 1-trip detection logic


    DTC Detection Condition 2

  1. The ignition switch is ON.

  2. 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 (19 mph) to 0 km/h (0 mph).

  3. 3 seconds or more

  4. 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

CAUTION / NOTICE / HINT

Tech Tips

After performing repair, clear the DTCs and perform the following procedure to check that DTCs are not output.


  1. Drive the vehicle at 30 km/h (19 mph) or more for 60 seconds or more.

  2. While driving at 30 km/h (19 mph), depress the brake pedal 16 times or more until the vehicle is stopped.

  3. Check for DTCs again.

    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.


      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 (19 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.

    5. According to 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 assembly

      Min.: 0 V

      Max.: 79.998 V

      • 2.31 to 2.69 V: Vehicle on level ground

      • 1.88 to 2.5 V: Decelerating

      • 2.5 to 3.11 V: Accelerating

      • Stuck at 1.87 V: G sensor malfunction

      • Stuck at 1.87 V: Communication malfunction

      		 -

      Powertrain > Engine and ECT > Data List
      Tester Display
      G Sensor
      Result
      Result Proceed to
      Data List value is not normal A
      Data List value is normal B

    B

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    A

  4. REPLACE AIRBAG SENSOR ASSEMBLY


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

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    PERFORM INITIALIZATION Click here