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 of the airbag sensor assembly (yaw rate and acceleration sensor) is determined based on a malfunction signal from the skid control ECU (brake actuator assembly), the ECM stores this DTC.

Tech Tips


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

After the ignition switch is turned ON, the skid control ECU (brake actuator assembly) has detected either one of the following conditions, and the ECM has received a diagnostic signal from the skid control ECU (brake actuator assembly) for 3 seconds or more (1 trip detection logic).


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

  • 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).

  • Airbag sensor assembly (Yaw rate and acceleration sensor)

  • Brake actuator assembly (Skid control ECU)

  • CAN communication system

 Does not come on DTC stored
DTC Detection Condition Patterns:
Vehicle Condition
Pattern 1 Pattern 2
Diagnostic Condition The ignition switch is ON. ○ ○
Malfunction Condition 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. ○ -
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). - ○
Duration 3 seconds or more 3 seconds or more
Detection Logic 1 trip detection logic 1 trip detection logic

Tech Tips

This DTC is output when either of the above detection patterns is met.

WIRING DIAGRAM

Refer to DTC P1585

Click here

CAUTION / NOTICE / HINT

Note


  • Perform initialization after replacing any parts related to the continuously variable transaxle system.

    Click here

  • Check that no DTCs are stored after performing initialization.

    Click here

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.

      Click here


      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.


      Powertrain > Engine and ECT > Data List
      Tester Display
      G Sensor

    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.: 79.998 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 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