LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2007 >> LX 470 >> Repair and Diagnosis >> Suspension >> Suspension Control Systems >> Suspension Control >> Active Height Control Suspension >> On-Vehicle Inspection

On-Vehicle Inspection

  1. INSPECT FLUID LEVEL 
    1. Start the engine on a level place. Adjust the vehicle height to "N" position with the vehicle unloaded.
      NOTE: After adjusting the vehicle height to control the fluid pressure in the height control accumulator, do not turn the engine OFF.
    2. Check that the fluid level in the reservoir tank of the AHC pump and motor is within the standard range.
    Fig 1: Identifying Fluid Level In Reservoir Tank
    G04063522Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. OPERATE HEIGHT SELECT SWITCH AND CHECK CHANGE OF VEHICLE HEIGHT 
    1. Check the tires for the proper inflation pressure ( INSPECTION ).
    2. Check the vehicle height ( FRONT WHEEL ALIGNMENT ).
    3. Start the engine.
    4. Push the height select switch to change from "N" to the "HI" mode.
    5. Check the time required for the height changed and the changed amount of the vehicle height.

      Standard value 

      Fig 2: Checking Change Of Vehicle Height
      G04063523Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      HEIGHT CHANGES SPECIFICATIONS

      Operation Specified Condition
      "HI" mode (Up time) 15 sec. or less

      Amount of change in vehicle height 

      VEHICLE HEIGHT CHANGE AMOUNT

      Item Specified Condition
      Front 30 to 45 mm (1.18 to 1.77 in.)
      Rear 40 to 55 mm (1.57 to 2.17 in.)
      NOTE: After vehicle height control has been completed, wait for approximately 5 seconds until the height is fixed securely, then check the changed amount of vehicle height.
    6. Push the height select switch to change from "N" to the "LO" mode.
    7. Check the time required for the height change and the changed amount of the vehicle height.
    Fig 3: Checking Time Required For Height Change
    G04063524Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard value 

    HEIGHT CHANGES SPECIFICATIONS

    Operation Specified Condition
    "LO" mode (Down time) 10 sec. or less

    Amount of change in vehicle height 

    VEHICLE HEIGHT CHANGE AMOUNT

    Item Specified Condition
    Front 40 to 55 mm (1.57 to 2.17 in.)
    Rear 30 to 45 mm (1.18 to 1.77 in.)
    NOTE: After vehicle height control has been completed, wait for approximately 5 seconds until the height is fixed securely, then check the changed amount of vehicle height.
  3. INSPECT SUSPENSION CONTROL SWITCH (HEIGHT SELECT SWITCH) 
    1. Remove the suspension control switch.
    2. Disconnect the suspension control switch (for height select switch) connector.
    3. Measure the resistance between terminals 6, 10 and 4 of suspension control switch (for height select switch) connector when UP and DOWN button of the height select switch is pushed.

    Standard resistance 

    RESISTANCE SPECIFIED CONDITIONS

    Tester Connection Condition Specified Condition
    6 - 4 UP button pushed Below 1 Ω
    6 - 4 DOWN button pushed 10 kΩ or higher
    10 - 4 DOWN button pushed Below 1 Ω
    10 - 4 UP button pushed 10 kΩ or higher
    Fig 4: Inspecting Suspension Control Switch (Height Select Switch)
    G04063525Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. INSPECT SUSPENSION CONTROL SWITCH (DAMPING MODE CONTROL SWITCH) 
    1. Remove the suspension control switch.
    2. Disconnect the suspension control switch (for damping mode select switch) connector.
    3. Measure the resistance between terminals 2, 7 and 4 of the suspension control switch (for damping mode select switch) connector when changing the damping mode select switch to each mode.

    Standard resistance 

    RESISTANCE SPECIFIED CONDITIONS

    Tester Connection Condition Specified Condition
    2 - 4 COMFORT Below 1 Ω
    2 - 4 NORMAL Below 1 Ω
    2 - 4 SPORT 1 10 kΩ or higher
    2 - 4 SPORT 2 10 kΩ or higher
    7 - 4 COMFORT 10 kΩ or higher
    7 - 4 NORMAL Below 1 Ω
    7 - 4 SPORT 1 Below 1 Ω
    7 - 4 SPORT 2 10 kΩ or higher
    Fig 5: Inspecting Suspension Control Switch (Damping Mode Control Switch)
    G04063526Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. INSPECT SUSPENSION CONTROL SWITCH (HEIGHT CONTROL SWITCH) 
    1. Remove the suspension control switch.
    2. Disconnect the suspension control switch (for height control switch) connector.
    3. Measure the resistance between terminals 9 and 4 of the suspension control switch (for height control switch) connector when the height control switch is pushed and released.

    Standard resistance 

    RESISTANCE SPECIFIED CONDITIONS

    Tester Connection Condition Specified Condition
    9 - 4 Pushed Below 1 Ω
    9 - 4 Released 10 kΩ or higher
  6. INSPECT VEHICLE SPEED SENSING FUNCTION 
    1. When vehicle height is in the "LO" position:
      1. Start the engine and push the height select switch to select the "LO" mode.
      2. Drive the vehicle at approximately 10 km/h (7 mph) or more and check with an indicator that the vehicle height changes from "LO" to "N".
    2. When vehicle height is in the "HI" position:
      1. Start the engine and push the height select switch to select the "HI" mode.
      2. Drive the vehicle at 30 km/h (19 mph) or more and check with an indicator that the vehicle height changes from "HI" to "N".
      Fig 6: Inspecting Suspension Control Switch (Height Control Switch)
      G04063527Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. When the height control switch is operated:
    1. Push the height control switch to turn off the height control.
    2. Drive the vehicle and check with the indicator that the height control is activated automatically.

    Standard value 

    VEHICLE HEIGHT AND SPEED STANDARD VALUE

    Vehicle Height Vehicle Speed
    HI More than 30 km/h (19 mph)
    N More than 80 km/h (50 mph)
    LO More than 30 km/h (19 mph)
  7. INSPECT PRESSURE VALUE OF FRONT SHOCK ABSORBER (IN CASE OF USING INTELLIGENT TESTER) 
    NOTE: Perform the operation with vehicle unloaded (with the fuel tank filled up).
    1. Connect the intelligent tester (with CAN VIM) to the DLC3 on the vehicle.
    2. Start the engine and push the height select switch to adjust the vehicle height to the "N".
    3. Push the height select switch to adjust the vehicle height from N" to "LO", then back to "N".
      NOTE: Adjust it without passengers.
    4. Stop the engine.
    5. Read the pressure value of the front shock absorber with intelligent tester at this time.

      Standard pressure: 6.9 +- 0.5 MPa (70 +- 5 kgf/cm 2  , 996 +- 71 psi) 

    6. Start the engine and push the height select switch to adjust the vehicle height to "N".
    7. Check the fluid level.
  8. INSPECT PRESSURE VALUE OF FRONT SHOCK ABSORBER (IN CASE OF NOT USING INTELLIGENT TESTER) 
    NOTE:
    • Perform the operation with the vehicle unloaded (with the fuel tank filled up).
    • After and before using LSPV gauge (SST) and adapter, make sure to clean the hose, gauge and adapter.
    1. Start the engine and push the height select switch to adjust the vehicle height to "LO".
    2. With the ignition switch OFF, discharge the suspension fluid AHC from the bleeder plug of the either front right or left wheel damping force control actuator.
      CAUTION: The fluid gushes out because of high pressure, so discharge the fluid in the same way as air bleeding.
      Fig 7: Connecting Intelligent Tester To DLC3
      G04064541Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Remove the bleeder plug of either right or left damping force control actuator and install the LSPV gauge (SST).

      SST 09709-29018 

    4. Start the engine and push the height select switch to adjust the vehicle height to "N".
    5. Push the height select switch to adjust the vehicle height from "N" to "LO", then back to "N".
    6. Stop the engine.
    7. Read the pressure value of LSPV gauge (SST) at this time.

      SST 09709-29018 

      Standard pressure: 5.7 +- 0.3 MPa (58 +- 3 kgf/cm 2  , 825 +- 43 psi) 

    8. Start the engine and push the height select switch to adjust the vehicle height to "LO".
    9. With the ignition switch OFF, discharge the suspension fluid AHC from the bleeder plug of LSPV gauge (SST).

      SST 09709-29018 

      CAUTION: The fluid gushes out because of high pressure, so discharge the fluid in the same way as air bleeding.
    10. Remove the LSPV gauge (SST).

      SST 09709-29018 

      Fig 8: Identifying LSPV Gauge (SST)
      G04063529Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    11. Install the bleeder plug.

      Torque: 8.3 N*m (84 kgf*cm, 73 in.*lbf) 

    12. Bleed the air ( BLEEDING ).

      HINT:

      Bleed the bleeder plug with LSPV gauge (SST) installed to only once.

    13. Check the fluid level.
  9. INSPECT PRESSURE VALUE OF REAR SHOCK ABSORBER (IN CASE OF USING INTELLIGENT TESTER) 
    NOTE: Perform the operation with the vehicle unloaded (with the fuel tank filled up).
    1. Connect the intelligent tester to the DLC3 on the vehicle.
      Fig 9: Connecting Intelligent Tester To DLC3
      G04064541Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the fluid temperature sensor connector.
    3. Start the engine and push the height select switch to adjust the vehicle height from "N" to "LO", then back to "N".
      NOTE: Adjust it without passengers.
    4. Stop the engine.
    5. Read the pressure valve of the rear shock absorber with the intelligent tester at this time.

      Standard pressure: 5.6 to 6.7 MPa (57 to 68 kgf/cm 2  , 811 to 967 psi) 

      If the pressure is not within the specified range, its cause may be that a load object is either installed or removed.

      HINT:

      The cylinder pressure read by the intelligent tester is estimated by the pump emitted pressure so the pressure is approximately 1.2 MPa (12 kgf/cm2 , 171 psi) higher than the pressure read by the LSPV gauge (SST).

    6. Connect the fluid temperature sensor connector.
    7. Check the DTC (DTC CHECK / CLEAR  ).

      If the DTC is displayed, clear the DTC (DTC CHECK / CLEAR  ).

    8. Start the engine and push the height select switch to adjust the vehicle height to "LO", then to "N". At this time, check that the 4 wheels are raised simultaneously.
  10. INSPECT PRESSURE VALUE OF REAR SHOCK ABSORBER (IN CASE OF NOT USING INTELLIGENT TESTER) 
    NOTE:
    • Perform the operation with the vehicle unloaded (with the fuel tank filled up).
    • After and before using LSPV gauge (SST) and adapter, make sure to clean the hose, gauge and adapter.
    1. Start the engine and push the height select switch to adjust the vehicle height to "LO".
    2. With the ignition switch OFF, discharge the suspension fluid AHC from the bleeder plug of the either rear right or left wheel damping force control actuator.
      CAUTION: The fluid gushes out because of high pressure, so discharge the fluid in the same way as air bleeding.
    3. Remove the bleeder plug of either right or left damping force control actuator and install the LSPV gauge (SST).
    4. Start the engine and push the height to "N".
    5. Push the height select switch to adjust the vehicle height from "N" to "LO", then back to "N".
    6. Stop the engine.
    7. Read the pressure value with LSPV gauge (SST) at this time.

      SST 09709-29018 

      Standard pressure: 4.4 to 5.5 MPa (45 to 56 kgf/cm 2  , 640 to 797 psi) 

      If the pressure is not within the specified range, its cause may be that a load object is either installed or removed.

    8. Start the engine and push the height select switch to adjust the vehicle height to "LO".
    9. With the ignition switch OFF, discharge the suspension fluid AHC from the bleeder plug of LSPV gauge (SST).

      SST 09709-29018 

      CAUTION: The fluid gushes out because of high pressure, so discharge the fluid in the same way as air bleeding.
    10. Remove the LSPV gauge (SST).

      SST 09709-29018 

      Fig 10: Identifying LSPV Gauge (SST)
      G04063531Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    11. Install the bleeder plug.

      Torque: 8.3 N*m (84 kgf*cm, 73 in.*lbf) 

    12. Bleed the air ( BLEEDING ).

      HINT:

      Bleed air from the bleeder plug with LSPV gauge (SST) installed only once.

    13. Check the fluid level.
  11. INSPECT FLUID LEAKAGE 
    1. Inspect the connections of tube and parts for fluid leakage.
Fig 11: Identifying Connections Of Tube And Parts For Checking Fluid Leakage
G04063532Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
scientia non olet · About LEMON Manuals