Lexus RX (RX 350L, RX450h) 2016-2023 Repair Manual: 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 probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
  • Inspect the fuses related to this system before inspecting the suspected areas below.
Cooling Fan System

Symptom

Suspected Area

Link

Cooling fans do not operate

Engine coolant temperature sensor

Cooling fan motor LH

Cooling fan motor RH

FAN relay

Cooling fan circuit

Cooling fan ECU

ECM

Cooling fans do not stop (continue to operate)

Engine coolant temperature sensor

Cooling fan circuit

Cooling fan ECU

ECM

Cooling fan speed does not change

Cooling fan circuit

Cooling fan ECU

ECM

    System Diagram
    SYSTEM DIAGRAM ...

    On-vehicle Inspection
    ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT COOLING FAN SYSTEM CAUTION: To prevent injury due to contact with an operating cooling fan, keep your hands and clothing away from the cooling fans when insp ...

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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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