Lexus RX (RX 350L, RX450h) 2016-2025 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 and relays related to this system before inspecting the suspected areas below.
| Symptom | Suspected Area | Link |
|---|---|---|
| No functions operate. | Operation check | |
| Initialization | | |
| Proceed to "Power Source Circuit" | | |
| Fold seat control ECU | | |
| Fold/Return functions do not operate using a rear power seat switch. | Operation check | |
| Proceed to "Park/Neutral Position Switch Circuit" | | |
| Proceed to "Rear Power Seat Switch Circuit" | | |
| Proceed to "Rear Door Courtesy Switch Circuit" | | |
| Proceed to "Folding Motor Circuit" | | |
| Fold/Return functions do not operate using the fold seat switch assembly. | Operation check | |
| Proceed to "Park/Neutral Position Switch Circuit" | | |
| Proceed to "Fold Seat Switch Circuit" | | |
| Proceed to "Back Door Courtesy Switch Circuit" | | |
| Proceed to "Folding Motor Circuit" | | |
| Reclining function does not operate. | Operation check | |
| Proceed to "Fold Seat Switch Circuit" | | |
| Proceed to "Reclining Motor Circuit" | | |
| Fold seat control ECU | | |
| Buzzer sounds continuously while engine switch is on (IG) and functions do not operate. | Operation check | |
| Initialization | | |
| Proceed to "Power Source Circuit" | | |
| Fold seat control ECU | | |
| Seatback only operates partway. | Operation check | |
| Initialization | | |
| Proceed to "Reclining Motor Circuit" | | |
| Proceed to "Folding Motor Circuit" | |
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Initialization
INITIALIZATION INITIALIZATION (INITIAL POSITION MEMORIZATION) NOTICE: It is necessary to perform Initialization (initial position memorization) in the following situations.
The fold seat control EC ...
Park / Neutral Position Switch Circuit
DESCRIPTION The fold seat control ECU receives switch operation signals, the back door courtesy light switch assembly signal*1, rear door courtesy light switch assembly signal*2 and driving condition ...
Other materials:
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Power Steering System: Dtc Check / Clear
DTC CHECK / CLEAR CHECK DTCs (USING TECHSTREAM) (a) Turn the engine switch off. (b) Connect the Techstream to the DLC3. (c) Turn the engine switch on (IG). (d) Turn the Techstream on. (e) Enter the following menus: Chassis / EMPS / Trouble Codes. Chassis > EMPS > Trouble Codes (f) Check the de ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Front Door: Disassembly
DISASSEMBLY CAUTION / NOTICE / HINT The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during front door disassembly/reassembly are shown below. Necessary Procedures After Parts Removed/Installe ...
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
- For your information
- Pictorial index
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- Instrument cluster
- Operation of each component
- Driving
- Lexus Display Audio system
- Interior features
- Maintenance and care
- When trouble arises
- Vehicle specifications
- For owners
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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