ACTIVE HEIGHT CONTROL SUSPENSION DATA LIST / ACTIVE TEST


  1. READ DATA LIST

    Tech Tips

    Using the intelligent tester to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

    Note

    In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.


    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. Enter the following menus: Chassis / AHC / Data List.

    5. According to the display on the tester, read the Data List.

      AHC
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      (Up&Down)G Sensor FR

      G (up and down) front acceleration sensor RH reading /

      min.: -1045.29 m/s2

      max.: 1045.26 m/s2

      0 +/-0.98 m/s2at still condition.

      Reading changes when vehicle (Front RH) is bounced.
      (Up&Down)G Sensor FL

      G (up and down) front acceleration sensor LH reading /

      min.: -1045.29 m/s2

      max.: 1045.26 m/s2

      0 +/-0.98 m/s2at still condition.

      Reading changes when vehicle (Front LH) is bounced.
      (Up&Down)G Sensor Rear

      G (up and down) rear acceleration sensor reading /

      min.: -1045.29 m/s2

      max.: 1045.26 m/s2

      0 +/-0.98 m/s2at still condition.

      Reading changes when vehicle (Rear) is bounced.
      (Back&Forth)G Sensor

      G sensor reading /

      min.: -4.5952 m/s2

      max.: 4.5953 m/s2

      0 +/-0.98 m/s2at still condition.

      Reading changes when vehicle is bounced.
      Oil Pressure Sensor

      Fluid pressure sensor reading /

      min.: -784.79 MPa (-8002.540 kgf/cm2, -113824.688 psi)

      max.: 784.76 MPa (8002.296 kgf/cm2, 113821.215 psi)

      - -
      Oil Temperature Sensor

      Fluid temperature sensor reading /

      min.: -3276.8°C (-5866.24°F)

      max.: 3276.7°C (5930.06°F)

      - -
      Gravity Sensor(Side to Side)

      Yaw rate sensor information /

      min.: -1176.37 m/s2

      max.: 1176.33 m/s2

      - -
      FR Height Control Sensor

      Front height control sensor RH reading /

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

      max.: 3276.7 mm (129 in.)

      - -
      FL Height Control Sensor

      Front height control sensor LH reading /

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

      max.: 3276.7 mm (129 in.)

      - -
      RR Height Control Sensor

      Rear height control sensor RH reading /

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

      max.: 3276.7 mm (129 in.)

      - -
      RL Height Control Sensor

      Rear height control sensor LH reading /

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

      max.: 3276.7 mm (129 in.)

      - -
      Height Offset Max

      Display of amount of vehicle height calibration that is possible /

      min.: 0 mm (0 in.)

      max.: 655.35 mm (25.801 in.)

      min.: 0 mm (0 in.)

      max.: 20 mm (0.787 in.)

      -
      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.)

      - -
      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.)

      - -
      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.)

      - -
      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.)

      - -
      Stop Light Switch

      Stop light switch /

      ON or OFF

      ON: Brake pedal depressed.

      OFF: Brake pedal released.

      -
      SPORT Switch

      Damping force control switch (SPORT) /

      ON or OFF

      ON: SPORT

      OFF: NORMAL or COMFORT

      -
      COMFORT Switch

      Damping force control switch (COMFORT) /

      ON or OFF

      ON: COMFORT

      OFF: NORMAL or SPORT

      -
      Door Switch

      Door switch /

      ON or OFF

      ON: Door open.

      OFF: All doors closed.

      -
      Access Mode Switch

      Access mode switch /

      ON or OFF

      OFF -
      Height Control Switch(Up)

      Height control switch (Up) /

      ON or OFF

      ON: Up button of the height control switch pushed.

      OFF: Height control switch not pushed.

      -
      Height Control Switch(Down)

      Height control switch (Down) /

      ON or OFF

      ON: Down button of the height control switch pushed.

      OFF: Height control switch not pushed.

      -
      Height Offset

      Vehicle height offset calibration condition reading /

      ON or OFF

      ON: Vehicle height offset calibration complete.

      OFF: Before vehicle height offset calibration.

      -
      TD Terminal

      TD terminal /

      ON or OFF

      ON: Height control OFF switch pushed.

      OFF: Height control OFF switch not pushed.

      -
      TC Terminal

      TC terminal /

      ON or OFF

      ON: DTC output.

      OFF: DTC not output.

      -
      TS Terminal

      TS terminal /

      ON or OFF

      ON: During test mode.

      OFF: Normal mode.

      -
      Differential Lock Switch

      Center differential lock switch /

      ON or OFF

      ON: Center differential locked.

      OFF: Center differential free.

      -
      L4 Switch

      Transfer position switch /

      ON or OFF

      ON: Transfer position switch set to L4.

      OFF: Transfer position switch set to H4.

      -
      IG Power Source Voltage

      ECU power supply voltage /

      min.: 0 V

      max.: 25.5 V

      Engine switch on (IG): 11 to 14 V -
      +B Power Source Voltage

      Power supply for damping force control actuator /

      min.: 0 V

      max.: 25.5 V

      Engine switch on (IG): 11 to 14 V -
      +B2 Power Source Voltage

      Power supply for No. 1 height control valve and front suspension control valve /

      min.: 0 V

      max.: 25.5 V

      Engine switch on (IG): 11 to 14 V -
      Steering Angle

      Steering angle sensor reading /

      min.: -49152°

      max. 49150.5°

      Actual steering angle.

      Left turn: reading increases.

      Right turn: reading decreases.

      -
      Engine Speed

      Engine speed /

      min.: 0 rpm

      max.: 25500 rpm

      Actual engine speed. Speed indicated on the combination meter.
      FR Wheel Speed

      Front right wheel speed reading /

      min.: 0 km/h (0 mph)

      max.: 255 km/h (159 mph)

      - -
      FL Wheel Speed

      Front left wheel speed reading /

      min.: 0 km/h (0 mph)

      max.: 255 km/h (159 mph)

      - -
      RR Wheel Speed

      Rear right wheel speed reading /

      min.: 0 km/h (0 mph)

      max.: 255 km/h (159 mph)

      - -
      RL Wheel Speed

      Rear left wheel speed reading /

      min.: 0 km/h (0 mph)

      max.: 255 km/h (159 mph)

      - -
      Driving Torque

      Actual driving torque /

      min.: -1024 Nm

      max.: 1023 Nm

      - -
      Damper Step FR

      Damper step (Front RH) /

      min.: 1 step

      max.: 255 step

      min.: 1 step

      max.: 16 step

      -
      Damper Step FL

      Damper step (Front LH) /

      min.: 1 step

      max.: 255 step

      min.: 1 step

      max.: 16 step

      -
      Damper Step RR

      Damper step (Rear RH) /

      min.: 1 step

      max.: 255 step

      min.: 1 step

      max.: 16 step

      -
      Damper Step RL

      Damper step (Rear LH) /

      min.: 1 step

      max.: 255 step

      min.: 1 step

      max.: 16 step

      -
      Max Damper Step FR

      Damper step (Front RH) /

      min.: 0 step

      max.: 255 step

      16 step -
      Max Damper Step FL

      Damper step (Front LH) /

      min.: 0 step

      max.: 255 step

      16 step -
      Max Damper Step RR

      Damper step (Rear RH) /

      min.: 0 step

      max.: 255 step

      16 step -
      Max Damper Step RL

      Damper step (Rear LH) /

      min.: 0 step

      max.: 255 step

      16 step -
      Adaptive Variable Suspension(AVS) Mode

      Adaptive variable suspension mode /

      NORMAL / COMFORT / SEMI CO / SEMI SP / SPORTS

      Actual conditions displayed. -
      Height Mode

      Height mode /

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

      Actual conditions displayed. -
      Access Mode

      Access mode /

      ON or OFF

      OFF -
      Height Control Prohibition

      Vehicle height control prohibition information /

      Permiss or Prohibi

      - -
      Front Right Height Solenoid

      Front height solenoid RH /

      ON or OFF

      - -
      Front Left Height Solenoid

      Front height solenoid LH /

      ON or OFF

      - -
      Rear Right Height Solenoid

      Rear height solenoid RH /

      ON or OFF

      - -
      Rear Left Height Solenoid

      Rear height solenoid LH /

      ON or OFF

      - -
      Front Gate Valve

      Front gate valve /

      ON or OFF

      - -
      Rear Gate Valve

      Rear gate valve /

      ON or OFF

      - -
      Accumulator Valve

      Accumulator valve /

      ON or OFF

      - -
      FR Gas spring Switch Valve

      Front gas spring switch valve RH /

      ON or OFF

      - -
      FL Gas spring Switch Valve

      Front gas spring switch valve LH /

      ON or OFF

      - -
      Pump Motor Relay

      Pump motor relay /

      ON or OFF

      - -
      Main Relay for Valve

      Main relay for valve /

      ON or OFF

      - -
      Main Relay for Actuator

      Main relay for actuator /

      ON or OFF

      - -
      Number of Trouble Codes

      Number of DTCs recorded /

      min.: 0

      max.: 255

      - -
  2. PERFORM ACTIVE TEST

    Tech Tips

    Using the intelligent tester to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests.


    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. Enter the following menus: Chassis / AHC / Active Test.

    5. According to the display on the tester, perform the Active Test.

      AHC
      Tester Display Test Part Control Range Diagnostic Note
      Damper Step FR Changes front damper RH step

      min.: 1 step

      max.: 16 step

      The Damper Step item of the Data List changes to the step selected in the Active Test.
      Damper Step FL Changes front damper LH step

      min.: 1 step

      max.: 16 step

      The Damper Step item of the Data List changes to the step selected in the Active Test.
      Damper Step RR Changes rear damper RH step

      min.: 1 step

      max.: 16 step

      The Damper Step item of the Data List changes to the step selected in the Active Test.
      Damper Step RL Changes rear damper LH step

      min.: 1 step

      max.: 16 step

      The Damper Step item of the Data List changes to the step selected in the Active Test.
      Front Right Height Solenoid Front height control solenoid valve RH ON or OFF Operation of solenoid can be heard.
      Front Left Height Solenoid Front height control solenoid valve LH ON or OFF Operation of solenoid can be heard.
      Rear Right Height Solenoid Rear height control solenoid valve RH ON or OFF Operation of solenoid can be heard.
      Rear Left Height Solenoid Rear height control solenoid valve LH ON or OFF Operation of solenoid can be heard.
      Front Gate Valve Front gate valve ON or OFF When the Front Gate Valve item of the Active Test is operated, the Front Gate Valve item of the Data List changes to ON/OFF.
      Rear Gate Valve Rear gate valve ON or OFF When the Rear Gate Valve item of the Active Test is operated, the Rear Gate Valve item of the Data List changes to ON/OFF.
      Accumulator Valve Accumulator valve ON or OFF Operation of solenoid can be heard.
      FR Gas Spring Switch Valve Front gas spring switch valve RH ON or OFF When the FR Gas Spring Switch Valve item of the Active Test is operated, the FR Gas Spring Switch Valve item of the Data List changes to ON/OFF.
      FL Gas Spring Switch Valve Front gas spring switch valve LH ON or OFF When the FL Gas Spring Switch Valve item of the Active Test is operated, the FL Gas Spring Switch Valve item of the Data List changes to ON/OFF.
      Front Right Wheel Up/Down Right front vehicle height UP, DOWN or OFF -
      Front Left Wheel Up/Down Left front vehicle height UP, DOWN or OFF -
      Rear Right Wheel Up/Down Right rear vehicle height UP, DOWN or OFF -
      Rear Left Wheel Up/Down Left rear vehicle height UP, DOWN or OFF -
      Front Wheel Up/Down Front vehicle height UP, DOWN or OFF -
      Rear Wheel Up/Down Rear vehicle height UP, DOWN or OFF -
      Front Wheel Up by Accumulator Raising of front vehicle height UP or OFF -
      Rear Wheel Up by Accumulator Raising of rear vehicle height. UP or OFF -