PROCEDURE
1. | CHECK NOISE CONDITION |
(a) Check from which direction the noise comes (front left or right, or rear left or right).
OK:
The location of the noise source can be determined.
NG | ![]() | GO TO STEP 3 |
|
2. | CHECK SPEAKERS |
(a) Check the installation conditions of the speaker units that are located near the noise source and that there are no cracks, scratches, deformation or other failures.
Result | Proceed to |
---|---|
No malfunction is found. | A |
A speaker is installed incorrectly. | B |
Foreign matter is in a speaker. | C |
A speaker cone paper is broken. | D |
B | ![]() | REINSTALL SPEAKER |
C | ![]() | REMOVE FOREIGN MATTER |
D | ![]() | REPLACE SPEAKER |
|
3. | CHECK NOISE CONDITIONS |
(a) Check the noise condition.
HINT:
The radio has a noise prevention function to reduce noise when listening to the radio. If a loud noise occurs, check whether the ground at the antenna mounting base and the noise prevention unit are installed and wired correctly.
Condition under which Noise Occurs | Noise Source |
---|---|
Noise increases when the accelerator pedal is depressed, but stops when the engine is stopped. | Generator |
Noise occurs during A/C or heater operation. | Blower motor |
Noise occurs when the horn switch is pressed and released or when pressed and held. | Horn |
Noise occurs synchronously with the turn signal blinking pattern. | Flasher |
Noise occurs during window washer operation. | Washer |
Noise occurs during wiper operation. | Wiper |
Noise occurs when the brake pedal is depressed. | Stop light switch |
Others | Static electricity |
HINT:
Result | Proceed to |
---|---|
The noise source cannot be determined. | A |
The noise source can be determined. | B |
A | ![]() | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
B | ![]() | REPAIR OR REPLACE NOISE SOURCE |
Lexus RX (RX 350L, RX450h) 2016-2023 Repair Manual > Telematics System: Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Telematics System DTC No. Detection Item Link U014087 Lost Communication with Body Control Module Missing Message U015587 Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message U016387 Lost Communication ...
Lexus RX (RX 350L, RX450h) 2016-2023 Repair Manual > Road Sign Assist System: Dtc Check / Clear
DTC CHECK / CLEAR CHECK FOR DTC (a) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Road Sign Assist / Trouble Codes. Body Electrical > Road Sign Assist > Trouble Codes (e) Check for DTCs (Test ...