AIR SUSPENSION SYSTEM 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. Warm up the engine.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn ON the intelligent tester.

    5. Enter the following menus: Chassis / Air suspension / Data List.

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

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

      (Up & Down) G sensor (Front RH) /

      Min.: -1045.29 m/s2

      Max.: 1045.26 m/s2

      0 +/- 0.98 m/s2when stationary

      		 The value changes when the vehicle (front RH) is bounced.
      (Up & Down) G Sensor FL

      (Up & Down) G sensor (Front LH) /

      Min.: -1045.29 m/s2

      Max.: 1045.26 m/s2

      0 +/- 0.98 m/s2when stationary

      		 The value changes when the vehicle (front LH) is bounced.
      (Up & Down) G Sensor Rear

      (Up & Down) G sensor (Rear) /

      Min.: -1045.29 m/s2

      Max.: 1045.26 m/s2

      0 +/- 0.98 m/s2when stationary

      		 The value changes when the vehicle (rear) is bounced.
      Gravity Sensor (Side to Side)

      Gravity sensor (Side to Side) /

      Min.: -1176.37 m/s2

      Max.: 1176.33 m/s2

      		- -
      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.)

      		 - -
      Damping Control Switch

      Absorber control switch /

      NORMAL, COMFORT or SPORT

      		 Indicates current absorber control switch position -
      Stop Light Switch

      Stop light switch /

      ON or OFF

      ON: Brake pedal depressed

      OFF: Brake pedal released

      		 -
      Door Switch

      Door switch /

      ON or OFF

      ON: Any doors open

      OFF: All doors closed

      		 -
      Height Control Switch (Up)

      Height control switch ("up" side) /

      ON or OFF

      ON: Switch pressed and held

      OFF: Switch not pressed

      		 -
      Height Control Switch (Down)

      Height control switch ("down" side) /

      ON or OFF

      ON: Switch pressed and held

      OFF: Switch not pressed

      		 -
      Height Position

      Vehicle height position /

      Normal or Not Normal

      Normal: Vehicle height position normal

      Not Normal: Vehicle height position not normal

      		 -
      Height Control

      Vehicle height control condition information /

      ON or OFF

      ON: Vehicle height control operating

      OFF: Vehicle height control not operating

      		 -
      TD Terminal

      TD terminal /

      ON or OFF

      ON: Height control not operating

      OFF: Height control operating

      		 -
      TC Terminal

      TC terminal /

      ON or OFF

      		 OFF -
      TS Terminal

      TS terminal /

      ON or OFF

      		 OFF -
      L4 Switch

      Transfer L4 detection switch /

      ON or OFF

      ON: Transfer in L4 position

      OFF: Transfer not in L4 position

      		 -
      IG Power Source Voltage

      Actual ECU power supply voltage /

      Min.: 0.0 V

      Max.: 25.5 V

      		 Ignition switch ON: 11 to 14 V -
      +B Power Source Voltage

      Actual battery power supply voltage /

      Min.: 0.0 V

      Max.: 25.5 V

      		 Ignition switch ON: 11 to 14 V -
      Steering Angle

      Steering angle /

      Min.: -49152.0 deg

      Max.: 49150.5 deg

      Actual steering angle

      Turned left: reading increases

      Turned right: reading decreases

      		 -
      Engine Speed

      Engine speed value /

      Min.: 0 rpm

      Max.: 25500 rpm

      		 Actual engine speed No large fluctuations when the engine speed is constant.
      FR Wheel Speed

      Front wheel RH speed value /

      Min.: 0 km/h (0 mph)

      Max.: 255 km/h (158 mph)

      		 Actual vehicle speed No large fluctuations when the engine speed is constant.
      FL Wheel Speed

      Front wheel LH speed value /

      Min.: 0 km/h (0 mph)

      Max.: 255 km/h (158 mph)

      		 Actual vehicle speed No large fluctuations when the engine speed is constant.
      RR Wheel Speed

      Rear wheel RH speed value /

      Min.: 0 km/h (0 mph)

      Max.: 255 km/h (158 mph)

      		 Actual vehicle speed No large fluctuations when the engine speed is constant.
      RL Wheel Speed

      Rear wheel LH speed value /

      Min.: 0 km/h (0 mph)

      Max.: 255 km/h (158 mph)

      		 Actual vehicle speed No large fluctuations when the engine speed is constant.
      Driving Torque

      Driving torque /

      Min.: -1024 Nm

      Max.: 1023 Nm

      		 - -
      Damper Step FR

      Damper step (Front RH) /

      Min.: 1 step

      Max.: 255 step

      		 1 to 16 step -
      Damper Step FL

      Damper step (Front LH) /

      Min.: 1 step

      Max.: 255 step

      		 1 to 16 step -
      Damper Step RR

      Damper step (Rear RH) /

      Min.: 1 step

      Max.: 255 step

      		 1 to 16 step -
      Damper Step RL

      Damper step (Rear LH) /

      Min.: 1 step

      Max.: 255 step

      		 1 to 16 step -
      Max Damper Step FR

      Max damper step (Front RH) /

      Min.: 0 step

      Max.: 255 step

      		 16 step -
      Max Damper Step FL

      Max damper step (Front LH) /

      Min.: 0 step

      Max.: 255 step

      		 16 step -
      Max Damper Step RR

      Max damper step (Rear RH) /

      Min.: 0 step

      Max.: 255 step

      		 16 step -
      Max Damper Step RL

      Max damper step (Rear LH) /

      Min.: 0 step

      Max.: 255 step

      		 16 step -
      Adaptive Variable Suspension (AVS) Mode

      Adaptive variable suspension (AVS) mode /

      NORMAL, COMFORT, SEMI CO, SEMI SP, SPORTS

      		 Indicates current absorber control switch position -
      Height Mode

      Height mode /

      NORMAL, ACCE LO, LO, STAN LO, FAST LO, L4 HI, HI, EX HI or LUGG LO

      NORMAL: Height control N mode

      LO: Height control LO mode

      HI: Height control HI mode

      		 -
      Height Control Prohibition

      Height control prohibition /

      Permiss or Prohibi

      Permiss: Height control permitted

      Prohibi: Height control prohibited

      		 -
      Rear Gate Solenoid

      Status of rear gate solenoid /

      ON or OFF

      ON: Gate solenoid operated

      OFF: Gate solenoid not operated

      		 -
      Rear Leveling Solenoid

      Status of rear leveling solenoid /

      ON or OFF

      ON: Leveling solenoid operated

      OFF: Leveling solenoid not operated

      		 -
      Exhaust Solenoid

      Status of the exhaust solenoid /

      ON or OFF

      ON: Exhaust solenoid valve operated

      OFF: Exhaust solenoid valve not operated

      		 -
      Motor Relay

      Status of the motor relay /

      ON or OFF

      ON: Compressor operated

      OFF: Compressor not operated

      		 -
      Main Relay

      Status of the main relay /

      ON or OFF

      ON: Main relay on (Ignition switch ON)

      OFF: Main relay off

      		 -
      Compatible Constant Information

      Compatible constant information /

      Min.: 0

      Max.: 255

      		 - -
      Identical Constant Information

      Identical constant information /

      Min.: 0

      Max.: 255

      		 - -
      Design Constant Information

      Vehicle identification information number /

      Min.: 0

      Max.: 255

      		 - -
      Number of Trouble Codes

      Number of DTCs stored /

      Min.: 0

      Max.: 255

      		 0 -

  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. Warm up the engine.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn ON the intelligent tester.

    5. Enter the following menus: Chassis / Air suspension / Active Test.

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

      Air Suspension
      Tester Display Test Part Control Range Diagnostic Note
      Damper Step FR Changes damper step (Front RH) 1 to 16 step The shock absorber hardens as the damper step increases.
      Damper Step FL Changes damper step (Front LH) 1 to 16 step The shock absorber hardens as the damper step increases.
      Damper Step RR Changes damper step (Rear RH) 1 to 16 step The shock absorber hardens as the damper step increases.
      Damper Step RL Changes damper step (Rear LH) 1 to 16 step The shock absorber hardens as the damper step increases.
      Rear Wheel Up/Down Rear vehicle height OFF, Up or Down -
      Rear Gate Solenoid Gate solenoid valve ON or OFF

      • The operating sound of the solenoid (clicking sound) can be heard.

      • When the Active Test is performed, Rear Gate Solenoid in the Data List changes between ON and OFF accordingly.
      Rear Leveling Solenoid Leveling solenoid valve ON or OFF

      • The operating sound of the solenoid (clicking sound) can be heard.

      • When the Active Test is performed, Rear Leveling Solenoid in the Data List changes between ON and OFF accordingly.
      Exhaust Solenoid Exhaust solenoid valve ON or OFF

      • The operating sound of the solenoid (clicking sound) can be heard.

      • When the Active Test is performed, Exhaust Solenoid in the Data List changes between ON and OFF accordingly.
      Compressor Motor Relay AIR SUS relay ON or OFF

      • The operating sound of the relay (clicking sound) can be heard.

      • When the Active Test is performed, Compressor Motor Relay in the Data List changes between ON and OFF accordingly.