ACTIVE HEIGHT CONTROL SUSPENSION ON-VEHICLE INSPECTION


  1. OPERATE HEIGHT CONTROL SWITCH AND CHECK CHANGE OF VEHICLE HEIGHT

    Note


    • Perform the inspection with the vehicle empty.

    • When operating the height control switch, operate the switch with the driver door opened, and then close the driver door after getting out of the vehicle.

    Tech Tips

    Vehicle height control starts just after closing the door.


    1. Set the tires to the specified tire pressure, and adjust all 4 wheels.

    2. For the front side, measure the ground clearance of the front adjusting cam bolt center.

      For the rear side, measure the ground clearance of the rear lower control arm front side center.

      Tech Tips

      Refer to the following for the measurements Click here.

    3. Start the engine.

    4. A015CHS

      Push the height control switch to change from "N" to "HI" mode.

    5. Check the time required for the height change and the changed amount of the vehicle height.

      Standard Value
      Vehicle Condition Fluid Temperature Condition Reference Value
      "HI" mode (Up time) 20°C (68°F) +/-10°C (50°F) Approximately 15 seconds or less
      Amount of Change in Vehicle Height
      Item Specified Condition
      Front Approximately +50 mm (+1.97 in.)
      Rear Approximately +60 mm (+2.36 in.)

      Note

      After vehicle height control has been completed, wait for approximately 20 seconds until the height is fixed securely, then check the changed amount of vehicle height.

    6. A01582Z

      Push the height control switch to change from "N" to "LO" mode.

    7. Check the time required for the height change and the changed amount of the vehicle height.

      Standard Value
      Vehicle Condition Fluid Temperature Condition Reference Value
      "LO" mode (Down time) 20°C (68°F) +/-10°C (50°F) Approximately 10 seconds or less
      Amount of Change in Vehicle Height
      Item Specified Condition
      Front Approximately -60 mm (-2.36 in.)
      Rear Approximately -40 mm (-1.57 in.)

      Note

      After vehicle height control has been completed, wait for approximately 20 seconds until the height is fixed securely, then check the changed amount of vehicle height.

  2. INSPECT FLUID PRESSURE

    Note

    With the vehicle empty, perform this inspection with 1 person sitting in the driver seat in order to confirm that the switch operation and vehicle height change have been completed.

    Tech Tips

    The average weight for one person is about 55 kg (121.3 lb).


    1. Turn the engine switch off.

    2. Connect the intelligent tester to the DLC3.

    3. Start the engine and turn the tester on.

    4. Press the UP button of the height control switch. Using the Data List, check the oil pressure when the vehicle height changes from NORMAL to HI.

      AHC
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Oil Pressure Sensor

      Fluid pressure sensor reading /

      min.: -784.79 MPa (-8002.66 kgf/cm2, -113794.55 psi)

      max.: 784.76 MPa (8002.354 kgf/cm2, 113790.2 psi)

      		 - -
      Standard Pressure
      Vehicle Condition Fluid Temperature Condition Reference Value
      When vehicle height changes from NORMAL to HI 20°C (68°F) +/-10°C (50°F)

      The oil pressure begins rising when control is started and reaches approximately 13 MPa (132.6 kfg/cm2, 1885 psi) when the vehicle height is almost finished changing to HI.

    5. Set the vehicle height to LO and press the UP button of the height control switch. Then check the oil pressure when the vehicle height changes from LO to NORMAL.

      Standard Pressure
      Vehicle Condition Fluid Temperature Condition Reference Value
      When vehicle height changes from LO to NORMAL 20°C (68°F) +/-10°C (50°F)

      The oil pressure begins rising when control is started and reaches approximately 8 MPa (81.6 kfg/cm2, 1160 psi) when the vehicle height is almost finished changing to NORMAL.

  3. INSPECT VEHICLE SPEED SENSING FUNCTION

    Tech Tips

    When the vehicle speed sensing function control operates, nothing displays on the indicator in the combination meter.


    1. Turn the engine switch off.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the engine switch on (IG) and the tester on.

    4. Using the Data List, check the vehicle speed sensing function.

      AHC
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Height Mode

      Height mode /

      NORMAL / ACCE LO / LO / STAN LO / FAST LO / L4 HI / HI / EX HI

      		 Actual conditions are displayed. -

    5. When the transfer is in the L4 position:


      1. When the vehicle is driven at a speed of approximately 3 km/h (2 mph) or more, check that the vehicle height changes to HI using the Data List.

        OK
        The display changes to HI.

      2. Using the Data List, check if the vehicle height changes from HI to L4 HI when the vehicle speed is 40 km/h (25 mph) or more.

        OK
        The display changes to L4 HI.

    6. When driving at a high speed:


      1. Using the Data List, check that the vehicle height lowers when the vehicle height is NORMAL and the vehicle speed is 100 km/h (62 mph) or more.

        OK
        The display changes to FAST LO.

      2. Using the Data List, check that the vehicle height returns to NORMAL when the vehicle speed is reduced to less than 80 km/h (50 mph).

        OK
        The display changes to NORMAL.

    7. When vehicle height control is prohibited:


      1. Press the height control OFF switch to prohibit vehicle height control.

      2. Drive the vehicle at 80 km/h (50 mph) or more with the vehicle height NORMAL, or drive the vehicle at 30 km/h (19 mph) or more with the vehicle height not NORMAL and, using the Data List, check that vehicle height control prohibition is canceled.

        AHC
        Tester Display Measurement Item/Range Normal Condition Diagnostic Note
        Height Control Prohibition

        Vehicle height control prohibition information/

        Permiss or Prohibi

        		 Actual conditions are displayed. -
        OK
        The display changes from Prohibi to Permiss.