Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: On-vehicle Inspection

Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual / Engine & Hybrid System / 2gr-fks (intake / Exhaust) / Intake System / On-vehicle Inspection

ON-VEHICLE INSPECTION

CAUTION / NOTICE / HINT

The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced when repairing air leaks in the intake system are shown below.

Necessary Procedures After Parts Removed/Installed/Replaced

Replaced Part or Performed Procedure

Necessary Procedure

Effect/Inoperative Function when Necessary Procedure not Performed

Link

Air leak from intake system is repaired

Inspection After Repair
  • Poor idle, etc.
  • Poor engine startability, etc.

PROCEDURE

1. INSPECT INTAKE SYSTEM

CAUTION:

To prevent injury due to contact with an operating V-ribbed belt or cooling fan, keep your hands and clothing away from the V-ribbed belt and cooling fans when working in the engine compartment with the engine running or the engine switch on (IG).

(a) Check that there are no vacuum leaks at the points shown in the illustration.

HINT:

Perform Inspection After Repair after repairing vacuum leaks in the intake system.

Click here

*a

for Intake Air Sound Creator

*b

for Intake Air Resonator

*c

for TMMC Made

*d

except TMMC Made

2. INSPECT INTAKE AIR CONTROL VALVE (for ACIS)

(a) Connect the GTS to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the GTS on.

(d) Enter the following menus: Powertrain / Engine / Active Test / Activate the VSV for Intake Control.

Powertrain > Engine > Active Test

Tester Display

Activate the VSV for Intake Control

*a

Actuator Rod

(e) When Activate the VSV for Intake Control is set to on, check that the actuator rod operates.

If the actuator rod does not operate, inspect the intake air control valve (for ACIS) and No. 1 vacuum switching valve assembly (for ACIS).

  • Inspect intake air control valve (for ACIS)

    Click here

  • Inspect No. 1 vacuum switching valve assembly (for ACIS)

    Click here

(f) When Activate the VSV for Intake Control is set to off, check that the actuator rod returns to its original position.

If the actuator rod does not return to its original position, inspect the intake air control valve (for ACIS) and No. 1 vacuum switching valve assembly (for ACIS).

  • Inspect intake air control valve (for ACIS)

    Click here

  • Inspect No. 1 vacuum switching valve assembly (for ACIS)

    Click here

3. PERFORM INITIALIZATION

(a) Perform Inspection After Repair after repairing vacuum leaks in the intake system.

Click here

    System Diagram
    SYSTEM DIAGRAM *1 Throttle Body with Motor Assembly *2 Intake Air Control Valve (for ACIS) *3 Intake Air Control Valve Actuator (for ACIS) *4 ECM *5 Vacuum Switching Valve (f ...

    Vacuum Switching Valve (for Acis)
    ...

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    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual

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