AIR SUSPENSION SYSTEM CALIBRATION


  1. VEHICLE HEIGHT OFFSET CALIBRATION

    Note


    • Make sure that the pressure of the tires is normal.

    • Make sure that the vehicle is empty.

    • Make sure that the parking brake is released and that the shift lever is in N. Ensure that the vehicle does not move at this time.

    Tech Tips

    If replacing the suspension control ECU and/or height control sensor, perform the vehicle height offset calibration.


    1. ADJUST THE PRESSURE OF THE TIRES


      1. Check the pressure of each tire and, if the value is not as specified, adjust it Click here.


        NEXT

    2. PERFORM VEHICLE HEIGHT INSPECTION


      1. Stabilize the suspension by releasing the parking brake and bouncing the corners of the vehicle up and down.

      2. Turn the power switch on (READY) and set the vehicle height in HI mode.

      3. Check that the HI mode light blinks and then remains on, and that the vehicle height control operation has finished.

      4. Set the vehicle height in N mode.

      5. Check that the N mode light blinks and then remains on, and that the vehicle height control operation has finished.

      6. Turn the power switch off.

      7. Move the shift lever to N and move the vehicle forward and rearward.

      8. Connect the intelligent tester to the DLC3.

      9. Turn the power switch on (IG).

      10. Turn the intelligent tester on.

      11. Using the intelligent tester

        Enter the following menus: Chassis / Air suspension / Data List. Then read and write the values for "After Height Adjust" and "Height Adjust" for each wheel.

        Air Suspension System
        Tester Display Measurement Item/Range Normal Condition
        FR Height Adjust

        Display of vehicle height offset recorded value of front right wheel /

        min.: -3276.8 mm (-129 in.)

        max.: 3276.7 mm (129 in.)

        		 -
        FL Height Adjust

        Display of vehicle height offset recorded value of front left wheel /

        min.: -3276.8 mm (-129 in.)

        max.: 3276.7 mm (129 in.)

        		 -
        RR Height Adjust

        Display of vehicle height offset recorded value of rear right wheel /

        min.: -3276.8 mm (-129 in.)

        max.: 3276.7 mm (129 in.)

        		 -
        RL Height Adjust

        Display of vehicle height offset recorded value of rear left wheel /

        min.: -3276.8 mm (-129 in.)

        max.: 3276.7 mm (129 in.)

        		 -
        FR After Height Adjust

        Display of after-calibration vehicle height value of front right wheel /

        min.: -3276.8 mm (-129 in.)

        max.: 3276.7 mm (129 in.)

        When vehicle height normal: 0 +/-20 mm (0 +/- 0.79 in.)

        When vehicle height is changing: Varies based on vehicle height

        After HEIGHT HIGH adjustment: 20 +/- 20 mm (0.79 +/- 0.79 in.)
        FL After Height Adjust

        Display of after-calibration vehicle height value of front left wheel /

        min.: -3276.8 mm (-129 in.)

        max.: 3276.7 mm (129 in.)

        When vehicle height normal: 0 +/-20 mm (0 +/- 0.79 in.)

        When vehicle height is changing: Varies based on vehicle height

        After HEIGHT HIGH adjustment: 20 +/- 20 mm (0.79 +/- 0.79 in.)
        RR After Height Adjust

        Display of after-calibration vehicle height value of rear right wheel /

        min.: -3276.8 mm (-129 in.)

        max.: 3276.7 mm (129 in.)

        When vehicle height normal: 0 +/-20 mm (0 +/- 0.79 in.)

        When vehicle height is changing: Varies based on vehicle height

        After HEIGHT HIGH adjustment: 20 +/- 20 mm (0.79 +/- 0.79 in.)
        RL After Height Adjust

        Display of after-calibration vehicle height value of rear left wheel /

        min.: -3276.8 mm (-129 in.)

        max.: 3276.7 mm (129 in.)

        When vehicle height normal: 0 +/-20 mm (0 +/- 0.79 in.)

        When vehicle height is changing: Varies based on vehicle height

        After HEIGHT HIGH adjustment: 20 +/- 20 mm (0.79 +/- 0.79 in.)

      12. Turn the power switch off.

      13. Inspect vehicle height and make a note of actual vehicle height Click here for front and Click here for rear).

      14. Calculate the absolute value of "Height Adjust" + (standard vehicle height - measurement vehicle height - "After Height Adjust" ) Click here and Click here for standard vehicle height).

        Standard
        Result Proceed to
        The absolute value of "Height Adjust" + (standard vehicle height - measurement vehicle height - "After Height Adjust" ) is more than 80 mm (3.15 in.). A
        The absolute value of "Height Adjust" + (standard vehicle height - measurement vehicle height - "After Height Adjust" ) is more than 10 (0.394 in.) mm but 80 mm (3.15 in.) or less. B
        The absolute value of "Height Adjust" + (standard vehicle height - measurement vehicle height - "After Height Adjust" ) is 10 mm (0.394 in.) or less. C

        Tech Tips

        When performing automatic vehicle height adjustment using the intelligent tester, the maximum height adjustment is 80 mm (3.15 in.). If the absolute value of "Height Adjust" + (standard vehicle height - measurement vehicle height - "After Height Adjust" ) is more than 80 mm (3.15 in.), first adjust the height control sensor links as necessary until the vehicle height compensation value is less than 80 mm (3.15 in.).


        B

        Go to step 4
        C

        END (VEHICLE HEIGHT ADJUSTMENT IS NOT NECESSARY)
        A

    3. PERFORM VEHICLE HEIGHT ADJUSTMENT USING HEIGHT CONTROL SENSOR LINK


      1. Adjust vehicle height using the height control sensor links Click here for front and Click here for rear).


        NEXT

    4. PERFORM AUTOMATIC VEHICLE HEIGHT ADJUSTMENT USING INTELLIGENT TESTER


      1. Turn the power switch on (READY) and set the vehicle height in HI mode.

      2. Check that the HI mode light blinks and then remains on, and that the vehicle height control operation has finished.

      3. Set the vehicle height in N mode.

      4. Check that the N mode light blinks and then remains on, and that the vehicle height control operation has finished.

      5. Turn the power switch off.

      6. Connect the intelligent tester to the DLC3.

      7. Turn the power switch on (IG).

      8. Turn the intelligent tester on.

      9. Enter the following menus: Chassis / Air suspension / Utility / Height Offset.

      10. Following the intelligent tester display, input the values of "wheel of which the vehicle height sensor is to be adjusted", "actual measured vehicle height" and "vehicle height standard value (designed value)".

        Tech Tips

        With the power switch on (IG) and the power switch off, perform automatic adjustment.

      11. Using the same procedure, perform "vehicle height sensor automatic adjustment" for the other height sensors.


        NEXT

    5. PERFORM VEHICLE HEIGHT INSPECTION


      1. Turn the power switch on (READY) and set the vehicle height in HI mode.

      2. Check that the HI mode light blinks and then remains on, and that the vehicle height control operation has finished.

      3. Set the vehicle height in N mode.

      4. Check that the N mode light blinks and then remains on, and that the vehicle height control operation has finished.

      5. Check that the vehicle height is within the specification Click here for front and Click here for rear).


        NEXT
        END