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 signals via AVC-LAN communication.
If a short to +B or short to ground occurs in an AVC-LAN communication line, 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 J156 stereo component amplifier assembly connector.
(c) Disconnect the J56 multi-display assembly connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| J148-17 (TX2+) - J156-8 (TX+) | Always | Below 1 Ω |
| J148-18 (TX2-) - J156-7 (TX-) | Always | Below 1 Ω |
| J148-5 (TX1+) - J56-7 (TX+) | Always | Below 1 Ω |
| J148-6 (TX1-) - J56-19 (TX-) | Always | Below 1 Ω |
| J148-17 (TX2+) or J156-8 (TX+) - Body ground | Always | 10 kΩ or higher |
| J148-18 (TX2-) or J156-7 (TX-) - Body ground | Always | 10 kΩ or higher |
| 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 |
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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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