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 ECU assembly (yaw rate and acceleration sensor). If a malfunction of the airbag ECU 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 ECU 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

After the ignition switch is turned ON, the brake actuator assembly (skid control ECU) has detected either one of the following conditions, and the ECM has received a diagnostic signal from the brake actuator assembly (skid control ECU) 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 ECU 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 ECU 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 ECU 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

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

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.

      Result
      Result Proceed to
      DTC U0129 is not output A
      DTC U0129 is output (w/o Toyota Safety Sense) B
      DTC U0129 is output (w/ Toyota Safety Sense) C

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    C

    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.

    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.

    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.

      Engine and ECT
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      G Sensor Converted output voltage of G sensor

      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

      		 -
      Result
      Result Proceed to
      Data List value is not normal A
      Data List value is normal (for TMMF Made LHD) B
      Data List value is normal (for TMMF Made RHD) C

    B

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    C

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    A

  4. REPLACE AIRBAG ECU ASSEMBLY


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

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    PERFORM INITIALIZATION Click here