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.
Horn System| Symptom | Suspected Area | Link |
|---|---|---|
| Horn does not sound | HORN fuse | - |
| HORN relay | | |
| Horn button assembly | | |
| Steering pad switch assembly | | |
| Spiral cable with sensor sub-assembly | | |
| Instrument panel junction block assembly | | |
| Harness or connector | - | |
| Horn sounds all the time | HORN relay | |
| Horn button assembly | | |
| Steering pad switch assembly | | |
| Spiral cable with sensor sub-assembly | | |
| Instrument panel junction block assembly | | |
| Main body ECU (Multiplex network body ECU) | | |
| Harness or connector | - | |
| Low pitched horn operates but high pitched horn does not operate | High pitched horn assembly | |
| Harness or connector | - | |
| High pitched horn operates but low pitched horn does not operate | Low pitched horn assembly | |
| Harness or connector | - |
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System Diagram
SYSTEM DIAGRAM ...
Data List / Active Test
DATA LIST / ACTIVE TEST PERFORM ACTIVE TEST HINT: Using the Techstream to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrus ...
Other materials:
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Power Window Control System: Key-off Operation Function Operates even if Operating Conditions are not Satisfied
DESCRIPTION When the front doors are closed, each power window regulator motor assembly can be operated for approximately 45 seconds after the engine switch is turned from on (IG) to off by receiving operation permission signals from the main body ECU (multiplex network body ECU). However, when appr ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Seat Belt Warning System: On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT DRIVER SEAT BELT WARNING LIGHT HINT: The seat belt warning light on the combination meter assembly is used for both the driver seat and front passenger seat. (a) Turn the engine switch on (IG). (b) When the driver seat belt is not fastened, check that the s ...
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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