Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: 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 and relays related to this system before inspecting the suspected areas below.

Operation Check

OPERATION CHECK CHECK WINDOW DEFOGGER SYSTEM (a) Turn the engine switch on (IG). (b) Check that the rear window defogger wire (back window glass) becomes warm by operating the rear window defogger swi ...

Terminals Of Ecu

TERMINALS OF ECU CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY *A w/o Seat Heater System *B w/ Seat Heater System (a) Disconnect the J43 air conditioning amplifier assembly connector. (b) Mea ...

Other materials:

Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Power Window Control System: Front Passenger Side Power Window does not Operate with Front Passenger Side Power Window Switch
DESCRIPTION When the engine switch is on (IG), the power window regulator motor assembly (for front passenger door) is operated by the power window regulator switch assembly. The power window regulator motor assembly (for front passenger door) has motor, regulator, and ECU functions. WIRING DIAGRAM ...

Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Lighting System: Ambient Illumination Light Circuit
DESCRIPTION The main body ECU (multiplex network body ECU) controls the ambient illumination lights. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the lights for circuits related to this system before performing the following procedure. Before replacing the main body ECU (multiplex n ...