CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM, Diagnostic DTC:P1589

DTC Code DTC Name
P1589 Acceleration Sensor Learning Value

DESCRIPTION

The ECM stores DTC P1589 if deceleration sensor zero point calibration is not performed or failed after system components such as the ECM are replaced.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P1589 Acceleration Sensor Learning Value

Either one of the following conditions is met (1 trip detection logic):


  • When the vehicle speed is 2 km/h (1.2 mph) or more, Deceleration Sensor Zero Point Calibration has not been completed.

  • While Deceleration Sensor Zero Point Calibration is performed, the learned values of Deceleration Sensor Zero Point Calibration are abnormal (out of normal range).

  • Deceleration Sensor Zero Point Calibration has not been performed.

  • Vehicle was not stable during Deceleration Sensor Zero Point Calibration.

  • Airbag sensor assembly (Yaw rate and acceleration sensor)

  • ECM

 Does not come on DTC stored
DTC Detection Condition Patterns:
Vehicle Condition
Pattern 1 Pattern 2
Diagnostic Condition The vehicle speed is 2 km/h (1.2 mph) or more. ○ -
Deceleration Sensor Zero Point Calibration is performed. - ○
Malfunction Condition Deceleration Sensor Zero Point Calibration has not been completed. ○ -
The learned values of Deceleration Sensor Zero Point Calibration are abnormal (out of normal range). - ○
Duration - -
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.

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 2 km/h (1 mph) or more.

  2. Check for DTCs again.

    Click here

PROCEDURE


  1. PERFORM INITIALIZATION (DECELERATION SENSOR ZERO POINT CALIBRATION)

    Note


    • If CVT oil pressure calibration is performed before deceleration sensor zero point calibration, DTC P1589 is stored. In this case, perform steps *1, *2, *3, *4 and *5 to return the system to normal.

    • Always perform calibration with the vehicle on level ground (Inclination: 0 +/- 0.25°).

    • Do not shake or vibrate the vehicle during calibration.


    1. Turn the ignition switch off.*1

    2. Move the shift lever to P and apply the parking brake.*2

    3. Connect the GTS to the DLC3.

    4. Turn the ignition switch to ON.*3

      Note

      Do not start the engine.

    5. Enter the following menus: Powertrain / Engine and ECT / Utility / Reset Memory.*4


      Powertrain > Engine and ECT > Utility
      Tester Display
      Reset Memory

    6. Enter the following menus: Powertrain / ECT / Utility / Deceleration Sensor Zero Point Calibration.*5


      Powertrain > Engine and ECT > Utility
      Tester Display
      Deceleration Sensor Zero Point Calibration

      Tech Tips


      • When "Complete" is displayed on the screen, deceleration sensor zero point calibration is complete.

      • If "Error" is displayed on the screen, the deceleration sensor circuit may be malfunctioning.

      • Shaking or vibrating the vehicle during deceleration sensor zero point calibration may cancel calibration. If "Error" is displayed on the screen, perform step *5 again.

    7. If "Error" is displayed on the GTS, read the DTCs using the GTS.

      Result
      Result Proceed to
      Deceleration sensor zero point calibration is completed normally A
      DTC P1589 is output B

    B

    CHECK AIRBAG SENSOR ASSEMBLY Click here

    A

  2. PERFORM CVT OIL PRESSURE CALIBRATION

    Note

    Do not clear the learned values by performing Reset Memory.


    1. Turn the ignition switch off and wait at least 30 seconds.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON and wait at least 2 seconds.

      Note

      Do not start the engine.

      Tech Tips

      CVT oil pressure calibration is performed with the ignition switch ON (engine stopped). However, calibration cannot be performed under the following conditions:


      • Oil pressure sensor value is 0.065 MPa (0.663 kgf/cm2, 9.43 psi) or higher.

      • CVT oil temperature is -5°C (23°F) or less or 120°C (248°F) or higher.

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

    5. Start the engine and wait at least 5 seconds.

      Note


      • Start the engine with the shift lever in P.

      • After starting the engine, do not operate the accelerator pedal.

    6. Enter the following menus: Powertrain / Engine and ECT / Utility / CVT Oil Pressure Calibration.

      Tech Tips


      • During CVT oil pressure calibration, the engine idle speed will increase.

      • When "Complete" is displayed on the screen, CVT oil pressure calibration is complete.

      • The learned values cannot be cleared by only disconnecting and reconnecting the cable to the negative (-) battery terminal.


      Powertrain > Engine and ECT > Utility
      Tester Display
      CVT Oil Pressure Calibration

    7. Check for DTCs again.


      Powertrain > Engine and ECT > Trouble Codes
      Result
      Proceed to
      NEXT

    NEXT

    END

  3. CHECK AIRBAG SENSOR ASSEMBLY


    1. Check the airbag sensor assembly (yaw rate and acceleration sensor) for any inclination, bracket deformation or installation clearance.

      OK
      The airbag sensor assembly (yaw rate and acceleration sensor) is installed correctly.
      Result
      Proceed to
      OK
      NG

    NG

    SECURELY INSTALL AIRBAG SENSOR ASSEMBLY Click here

    OK

  4. 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 within Normal Condition range A
      Data display is not within Normal Condition range B

    B

    REPLACE AIRBAG SENSOR ASSEMBLY Click here

    A

  5. REPLACE ECM


    1. Replace the ECM.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    PERFORM INITIALIZATION Click here

  6. 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