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Home >> Lexus >> 2008 >> LX 570 >> Repair and Diagnosis >> Suspension >> Suspension Control Systems >> Suspension Control >> Active Height Control Suspension >> Data List / Active Test

Data List / Active Test

  1. READ DATA LIST 

    HINT:

    Using the Techstream 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 Techstream to the DLC3.
    3. Turn the engine switch on (IG) and the Techstream on.
    4. Enter the following menus: Chassis / AHC / Data List.
    5. According to the display on the Techstream, read the Data List.

    AHC 

    AHC REFERENCE

    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/s2 at still condition The reading changes when the 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/s2 at still condition The reading changes when the 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/s2 at still condition The reading changes when the 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/s2 at still condition The reading changes when the 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.: -3276.8X (-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 mode select switch (SPORT) /
    ON or OFF    		 ON: SPORT
    OFF: NORMAL or COMFORT    		 -
    COMFORT Switch Damping mode select switch (COMFORT) /
    ON or OFF    		 ON: COMFORT
    OFF NORMAL or SPORT    		 -
    Door Switch Door courtesy light switch /
    ON or OFF    		 ON: Door open
    OFF: All doors closed    		 -
    Access Mode Switch Easy access mode switch /
    ON or OFF    		 ON: Easy access mode switch pushed and held
    OFF: Easy access mode switch not pushed    		 -
    Height Control Switch (Up) Height control switch (Up) /
    ON or OFF    		 ON: Up button of 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 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 The 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 Easy access mode /
    ON or OFF    		 ON: Easy access mode enabled
    OFF: Easy access mode 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 

    HINT:

    Using the Techstream 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 Techstream to the DLC3.
    3. Turn the engine switch on (IG) and the Techstream on.
    4. Enter the following menus: Chassis / AHC / Active Test.
    5. According to the display on the Techstream, perform the Active Test.

    AHC 

    AHC REFERENCE

    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 mm.: 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 the solenoid can be heard.
    Front Left Height Solenoid Front height control solenoid valve LH ON or OFF Operation of the solenoid can be heard.
    Rear Right Height Solenoid Rear height control solenoid valve RH ON or OFF Operation of the solenoid can be heard.
    Rear Left Height Solenoid Rear height control solenoid valve LH ON or OFF Operation of the 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 the 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 -
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