LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2007 >> LS 460 >> Repair and Diagnosis >> Suspension >> Suspension Control Systems >> Suspension Control >> Air Suspension System >> Indicator Circuit >> Inspection Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Inspection Procedure

NOTE:
  • Before performing troubleshooting, inspect the connectors of related circuits.
  • Before replacing the suspension control ECU, perform all of the following again: 1) symptom simulation (see ELECTRONIC CIRCUIT INSPECTION PROCEDURE ); 2) DTC inspection; and 3) Intelligent tester or Techstream inspection (Data List or Active Test). If no malfunctions are found in other areas, replace the suspension control ECU.
  • If the suspension control ECU or height control sensor is replaced, the vehicle height offset calibration must be performed (see INITIALIZATION  ).
  1. CHECK ECUS CONNECTED TO CAN BUS 
    1. Turn the engine switch off.
    2. Connect the Intelligent tester or Techstream to the DLC3.
    3. Check ECUs connected to CAN bus (see DIAGNOSIS SYSTEM ).

      Result 

      ECUS CONNECTED TO CAN BUS

      Result Proceed to
      No malfunction appears A
      Malfunction appears B

    B: GO TO CAN COMMUNICATION SYSTEM  (See CAN COMMUNICATION SYSTEM )

    A: GO TO NEXT STEP 

  2. CHECK DTC (ALL) 
    1. Turn the engine switch off.
    2. Connect the Intelligent tester or Techstream to the DLC3.
    3. Check for DTC all.

      Result 

      DTC (ALL)

      Condition Proceed to
      DTC is not output A
      CAN system DTC is output B
      LIN system DTC is output C

    B: GO TO CAN COMMUNICATION SYSTEM  (See CAN COMMUNICATION SYSTEM )

    C: GO TO LIN COMMUNICATION SYSTEM  (See DIAGNOSTIC TROUBLE CODE CHART )

    A: GO TO NEXT STEP 

  3. CHECK INDICATOR LIGHT OPERATION (ACTIVE TEST) 
    1. Turn the engine switch off.
    2. Connect the Intelligent tester or Techstream to the DLC3.
    3. Turn the engine switch on (IG) and turn the tester main switch on.
    4. Enter the following menus:
      1. Intelligent tester - Select: DIAGNOSIS / OBD/MOBD / BODY / METER / ACTIVE TEST /
      2. Techstream - Select: Body Electrical / Combination Meter / Active Test /
    5. Check the condition of the absorber control indicator light and height control indicator light by operating the tester.
      1. Intelligent tester

        METER 

        INTELLIGENT TESTER - METER SPECIFICATION

        Tester Display Test Part Control Range Diagnostic Note
        TEMS SPORTS Absorber control indicator light (SPORT)/ ON or OFF -
        TEMS COMFORT Absorber control indicator light (COMFORT)/ ON or OFF -
        HEIGHT INDIC Height control indicator light (HEIGHT HIGH)/ ON or OFF -
      2. Techstream

        Combination Meter 

        TECHSTREAM - COMBINATION METER SPECIFICATION

        Tester Display Test Part Control Range Diagnostic Note
        Indicat. TEMS Sports Absorber control indicator light (SPORT)/ ON or OFF -
        Indicat. TEMS Comfort Absorber control indicator light (COMFORT)/ ON or OFF -
        Indicat. Height High Height control indicator light (HEIGHT HIGH)/ ON or OFF -

        OK: Indicator light turns on when operating the tester. 

    NG: GO TO METER / GAUGE SYSTEM  (See HOW TO PROCEED WITH TROUBLESHOOTING )

    OK: GO TO NEXT STEP 

  4. CHECK SWITCH SIGNAL (SUSPENSION CONTROL ECU DATA LIST) 
    1. Turn the engine switch off.
    2. Connect the Intelligent tester or Techstream to the DLC3.
    3. Turn the engine switch on (IG) and turn the tester main switch on.
    4. Enter the following menus:
      1. Intelligent tester - Select: DIAGNOSIS / OBD/MOBD / CHASSIS / AIR SUSPENSION / DATA LIST /
      2. Techstream - Select: Chassis / Air suspension / Data List /
    5. Select each item below in the DATA LIST and read its value displayed on the tester.
      1. Intelligent tester

        AIR SUSPENSION 

        INTELLIGENT TESTER - AIR SUSPENSION SPECIFICATION

        Tester Display Measurement Item/Range Normal Condn Diagnostic Note
        SPORT SW Absorber control switch (SPORT)/ ON or OFF ON: SPORT
        OFF: normal        		 -
        COMFORT SW Absorber control switch (COMFORT)/ ON or OFF ON: COMFORT
        OFF: normal        		 -
        DAMPER SW 1 Height control switch (HEIGHT HIGH)/ ON or OFF ON: Switch is pressed and held
        OFF: Switch is not pressed        		 -
      2. Techstream

        Air suspension 

        TECHSTREAM - AIR SUSPENSION SPECIFICATION

        Tester Display Measurement Item/Range Normal Condn Diagnostic Note
        Sport switch Absorber control switch (SPORT)/ ON or OFF ON: SPORT
        OFF: normal        		 -
        Comfort Switch Absorber control switch (COMFORT)/ ON or OFF ON: COMFORT
        OFF: normal        		 -
        Damping Force Switch 1 Height control switch (HEIGHT HIGH)/ ON or OFF ON: Switch is pressed and held
        OFF: Switch is not pressed        		 -

        OK: On tester screen, item changes between ON and OFF according to switch operation. 

        Result 

        RESULT CHART

        Result Proceed to
        NG A
        OK B

    B: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (See  PROBLEM SYMPTOMS TABLE   ) 

    A: GO TO NEXT STEP 

  5. CHECK SWITCH SIGNAL (NO. 1 CONSOLE SWITCH DATA LIST) 
    1. Turn the engine switch off.
    2. Connect the Intelligent tester or Techstream to the DLC3.
    3. Turn the engine switch on (IG) and turn the tester main switch on.
    4. Enter the following menus:
      1. Intelligent tester - Select: DIAGNOSIS / OBD/MOBD / BODY / CENTER CONSOLE / DATA LIST /
      2. Techstream - Select: Body Electrical / Center Console Switch / Data List /
    5. Select each item below in the DATA LIST and read its value displayed on the tester.
      1. Intelligent tester

        CENTER CONSOLE 

        INTELLIGENT TESTER - CENTER CONSOLE SPECIFICATION

        Tester Display Measurement Item/Range Normal Condition Diagnostic Note
        SPORT SW Absorber control switch (SPORT)/ ON or OFF ON: SPORT
        OFF: normal        		 -
         
        COMFORT SW Absorber control switch (COMFORT)/ ON or OFF ON: COMFORT
         
        OFF: normal        		 -
        HEIGHT HIGH SW Height control switch (HEIGHT HIGH)/ ON or OFF ON: Switch is pressed and held
        OFF: Switch is not pressed        		 -
      2. Techstream

        Center Console Switch 

        TECHSTREAM - CENTER CONSOLE SWITCH SPECIFICATION

        Tester Display Measurement Item/Range Normal Condition Diagnostic Note
        SPORT Mode Switch Absorber control switch (SPORT)/ ON or OFF ON: SPORT
        OFF: normal        		 -
        COMFORT Mode Switch Absorber control switch (COMFORT)/ ON or OFF ON: COMFORT
        OFF: normal        		 -
        HEIGHT HIGH Switch Height control switch (HEIGHT HIGH)/ ON or OFF ON: Switch is pressed and held
        OFF: Switch is not pressed        		 -

        OK: On tester screen, item changes between ON and OFF according to switch operation. 

    NG: REPLACE NO. 1 CONSOLE SWITCH 

    OK: REPLACE SUSPENSION CONTROL ECU (See  REMOVAL   ) 

scientia non olet · About LEMON Manuals