Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: AVC-LAN Circuit
DESCRIPTION
Each unit of the audio and visual system connected to the AVC-LAN (communication bus) transmits switch signals via AVC-LAN communication.
If a short to +B or short to ground occurs in the AVC-LAN, the audio and visual system will not function normally because communication is not possible.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Audio and Visual System.
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HINT:
The radio receiver assembly is the master unit.
PROCEDURE
| 1. | INSPECT RADIO RECEIVER ASSEMBLY |
(a) Remove the radio receiver assembly.
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| (b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
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| NG | .gif) | REPLACE RADIO RECEIVER ASSEMBLY |
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| 2. | CHECK HARNESS AND CONNECTOR (AVC-LAN CIRCUIT) |
(a) Disconnect the J148 radio receiver assembly connector.
(b) Disconnect the J56 multi-display assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| J148-5 (TX1+) - J56-7 (TX+) | Always | Below 1 Ω |
| J148-6 (TX1-) - J56-19 (TX-) | Always | Below 1 Ω |
| J148-5 (TX1+) or J56-7 (TX+) - Body ground | Always | 10 kΩ or higher |
| J148-6 (TX1-) or- J56-19 (TX-) - Body ground | Always | 10 kΩ or higher |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 3. | INSPECT MALFUNCTIONING PARTS |
(a) Disconnect and reconnect each slave unit one by one until the master unit returns to normal.
HINT:
- Check all slave units.
- If disconnecting a slave unit causes the master unit to return to normal, the slave unit is defective and should be replaced.
OK:
Master unit returns to normal.
| OK | | REPLACE MALFUNCTIONING PARTS |
| NG | | REPLACE RADIO RECEIVER ASSEMBLY |
Data Signal Circuit between Radio Receiver and Stereo Jack Adapter
DESCRIPTION The No. 1 stereo jack adapter assembly sends the sound data signal or image data signal from a USB device to the radio receiver assembly via this circuit. WIRING DIAGRAM PROCEDURE 1. ...
Vehicle Speed Signal Circuit between Navigation ECU and Combination Meter
DESCRIPTION The navigation ECU receives a vehicle speed signal from the combination meter assembly. HINT:
A voltage of 12 V or 5 V is output from each ECU and then input to the combination meter as ...
Other materials:
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Seat Variable Cushion Switch: Installation
INSTALLATION CAUTION / NOTICE / HINT CAUTION: Wear protective gloves. Sharp areas on the parts may injure your hands. HINT:
Use the same procedure for the RH side and LH side.
The following procedure is for the LH side.
PROCEDURE 1. INSTALL SEAT VARIABLE CUSHION SWITCH (a) Install the sea ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Can Communication System: Lost Communication with Gateway Module (Main Body ECU) (U1002)
DESCRIPTION
The main body ECU (multiplex network body ECU) will store this DTC when no signals can be received from the ECUs that have been memorized as those that are connected to sub bus 1.
When the main body ECU (multiplex network body ECU) receives a response signal from the ECUs connected ...
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
- For your information
- Pictorial index
- For safety and security
- 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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