Adaptive Variable Suspension System Test Mode Procedure

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

  1. INDICATOR LIGHT CHECK

  1. SENSOR SIGNAL CHECK BY TEST MODE (SIGNAL CHECK)

  1. PERFORM SIGNAL CHECK BY TEST MODE (SIGNAL CHECK)

  1. READ DTC

  1. RESULT

  1. END OF SENSOR CHECK

  1. TEST MODE DTC (DTC of SIGNAL CHECK)

Adaptive Variable Suspension System -- Test Mode Procedure



INDICATOR LIGHT CHECK


    Lexus Gs430, Gs300. Uzs190 Grs190

  1. When the engine switch is turned on (IG), check that the absorber control indicator light will come on for approximately 2 seconds. (Absorber control switch is in the "NORMAL" position.)

    HINT:
    If the absorber control ECU stores any DTCs, the absorber control indicator light will come on.
    If the absorber control indicator light remains on or does not come on, proceed to troubleshooting for the 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

SENSOR SIGNAL CHECK BY TEST MODE (SIGNAL CHECK)
HINT:
  1. If the engine switch is turned from on (IG) to on (ACC) or off during Test Mode (Signal Check), all Test Mode DTCs will be erased.
  2. During Test Mode (Signal Check), the absorber control ECU records all Test Mode DTCs. By performing the Test Mode (Signal Check), the codes will be erased if normality is confirmed. The remaining codes will be the codes where an abnormality was found.


    Lexus Gs430, Gs300. Uzs190 Grs190.Suspension Control.Adaptive Variable Suspension System.Adaptive Variable Suspension System Test Mode Procedure

  1. Procedure for Test Mode.

    1. Turn the engine switch off.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the engine switch on (IG).



      4. Lexus Gs430, Gs300. Uzs190 Grs190

    4. Set the intelligent tester to Test Mode (select "Signal Check").

      HINT:
      Refer to the intelligent tester operator's manual for further details.

    5. Start the engine without depressing the brake pedal.



      6. Lexus Gs430, Gs300. Uzs190 Grs190.Suspension Control.Adaptive Variable Suspension System.Adaptive Variable Suspension System Test Mode Procedure

    6. Check that the absorber control indicator light is blinking in Test Mode.

      HINT:
      If the absorber control indicator light does not blink, inspect the absorber control indicator light circuit.
      Trouble area
      		See procedure
      Absorber control indicator light (Remains on)
      		Click here
      Absorber control indicator light (Does not come on)
      		Click here

PERFORM SIGNAL CHECK BY TEST MODE (SIGNAL CHECK)
HINT:
The "SPORT" indicator (absorber control indicator light) comes on for 1 second when inputting each diagnostic signal.

  1. Keep the absorber control switch in the "NORMAL" position.

  2. Keep the vehicle stationary on a level surface for 1 second or more (Acceleration sensor check).

  3. Turn the absorber control switch from the "NORMAL" to "SPORT" position and return to the "NORMAL" position. (An absorber control switch signal will be input.)

    INPUT SIGNAL TABLE
    Test Mode DTC
    		Test Signal
    C1787
    		Absorber control switch operation
    (When the mode change signal is input.)
    C1791
    		Right front acceleration sensor signal
    (When the vehicle is stopped on a level road for 1 second or more.)
    C1792
    		Left front acceleration sensor signal
    (When the vehicle is stopped on a level road for 1 second or more.)
    C1793
    		Rear acceleration sensor signal
    (When the vehicle is stopped on a level road for 1 second or more.)

READ DTC

  1. Read the DTC(s) by following the tester screen.

    HINT:
    See the list of Test Mode DTCs.

RESULT

Result:

Result
Operation
Test Mode DTC is output
Repair the output DTC and enter the Test Mode (SIGNAL CHECK) again
Test Mode DTC is not output
Test Mode (SIGNAL CHECK) is complete

END OF SENSOR CHECK


    Lexus Gs430, Gs300. Uzs190 Grs190.Suspension Control.Adaptive Variable Suspension System.Adaptive Variable Suspension System Test Mode Procedure

  1. Clear the DTCs. (Click here)

  2. Check that absorber control indicator light blinks (Test Mode).

  3. Turn both the engine switch off and intelligent tester switch off.


TEST MODE DTC (DTC of SIGNAL CHECK)

DTC No.
(See Procedure)
Detection Item
Trouble Area
C1787
Click here
EMS Switch Circuit (Test Mode DTC)
  1. Absorber control switch
  2. Absorber control switch circuit
  3. Absorber control ECU
C1791
Click here
Front Acceleration Sensor RH (Test Mode DTC)
  1. Absorber control ECU
    (Houses right front acceleration sensor assembly)
C1792
Click here
Front Acceleration Sensor LH (Test Mode DTC)
  1. Left front acceleration sensor assembly
  2. Left front acceleration sensor assembly circuit
  3. Absorber control ECU
C1793
Click here
Rear Acceleration Sensor (Test Mode DTC)
  1. Rear acceleration sensor assembly
  2. Rear acceleration sensor assembly circuit
  3. Absorber control ECU
HINT:
The codes in this table are output only in the test mode (Signal Check).