Adaptive Variable Suspension System Diagnosis System

Suspension & Axle. Lexus Gs430, Gs300. Uzs190 Grs190
Suspension Control. Lexus Gs430, Gs300. Uzs190 Grs190

  1. DIAGNOSIS SYSTEM

Adaptive Variable Suspension System -- Diagnosis System



DIAGNOSIS SYSTEM

  1. Inspect the battery voltage.

    Battery voltage:
    11 to 14 V
    If the voltage is below 11 V, recharge the battery before proceeding.


    2. Lexus Gs430, Gs300. Uzs190 Grs190.Suspension Control.Adaptive Variable Suspension System.Adaptive Variable Suspension System Diagnosis System

  2. Check DLC3.
    The absorber control ECU uses CAN and ISO 9141-2 (Euro-OBD) as its communication protocol. The terminal arrangement of the DLC3 complies with ISO 15031-3 and matches the ISO 9141-2 format.
    Verify the conditions listed in the table below:

    Symbols (Terminal No.)
    		Terminal Description
    		Condition
    		Specified Condition
    SIL (2) - SG (5)
    		Bus "+" line
    		During communication
    		Pulse generation
    CG (4) - Body ground
    		Chassis ground
    		Always
    		Below 1 Ω
    SG (5) - Body ground
    		Signal ground
    		Always
    		Below 1 Ω
    BAT (16) - Body ground
    		Battery positive
    		Always
    		11 to 14 V
    CANH (6) - CANL (14)
    		HIGH-level CAN bus line
    		Engine switch off
    		54 to 67 Ω
    CANH (6) - Battery positive
    		HIGH-level CAN bus line
    		Engine switch off
    		1 MΩ or higher
    CANH (6) - CG (4)
    		HIGH-level CAN bus line
    		Engine switch off
    		3 KΩ or higher
    CANL (14) - Battery positive
    		LOW-level CAN bus line
    		Engine switch off
    		1 MΩ or higher
    CANL (14) - CG (4)
    		LOW-level CAN bus line
    		Engine switch off
    		3 KΩ or higher
    HINT:
    If the intelligent tester display shows a communication error message when the cable of the intelligent tester is connected to the DLC3, the engine switch is turned on (IG) and the tester is in operation, there is a problem either on the vehicle side or tester side.
    1. If communication is normal when the tester is connected to another vehicle, inspect the DLC3 on the original vehicle.
    2. If communication is still not possible when the tool is connected to another vehicle, the problem is probably in the tester itself. Consult the service department listed in the tester's instruction manual.

  3. DTCs (Normal mode)

    1. DTCs are memorized in the absorber control ECU and read by using the intelligent tester (Click here).

  4. Test Mode (Signal Check)

    1. By switching from normal mode into Test Mode, you can inspect the absorber control switch and each acceleration sensor (Click here).



    5. Lexus Gs430, Gs300. Uzs190 Grs190

  5. Check the absorber control indicator light.

    1. Turn the engine switch on (IG).

    2. Check that the absorber control indicator light comes on for 2 seconds.
      If the indicator light check result is not normal, proceed to troubleshooting for the absorber control indicator light circuit below.

      Trouble area
      		See Procedure
      Absorber control indicator light (Remains on)
      		Click here
      Absorber control indicator light (Does not come on)
      		Click here