Lexus RX (RX 350L, RX450h) 2016-2023 Repair Manual: On-vehicle Inspection





To prevent injury due to contact with an operating cooling fan, keep your hands and clothing away from the cooling fans when inspecting the cooling fan system.

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine / Active Test / Control the Engine Cooling Fan Duty Ratio.

Powertrain > Engine > Active Test

Tester Display

Control the Engine Cooling Fan Duty Ratio

(e) Check the operation of the cooling fan while operating it using the Techstream.


Active Test Operation

Fan Operation

30 - 100%

Cooling fans operate


Cooling fans stop

If the cooling fan motor does not operate, check the cooling fan circuit.

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    Problem Symptoms Table
    PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of ...

    Cooling Fan Circuit
    DESCRIPTION The ECM calculates an appropriate cooling fan speed based on the engine coolant temperature, air conditioning switch condition, refrigerant pressure, engine speed and vehicle speed. The co ...

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    Lexus RX (RX 350L, RX450h) 2016-2023 Owners Manual > Instrument cluster: Energy monitor/consumption screen
    You can view the status of your hybrid system on the multi-information display and the audio system screen. Vehicles with a navigation system (12.3-inch display): The energy monitor or consumption screen can be displayed and operated on the side display. Multi-information display Audio ...

    Lexus RX (RX 350L, RX450h) 2016-2023 Repair Manual > Audio And Visual System (for 12.3 Inch Display): Vehicle Speed Signal Circuit between Stereo Component Amplifier and Combination Meter
    DESCRIPTION The stereo component amplifier assembly receives a vehicle speed signal from the combination meter assembly to control the ASL function. HINT: A voltage of 12 V or 5 V is output from each ECU and then input to the combination meter assembly. The signal is changed to a pulse signal at ...

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

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

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