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.
Click here
HINT:
The radio receiver assembly is the master unit.
PROCEDURE
1. | INSPECT RADIO RECEIVER ASSEMBLY |
(a) Remove the radio receiver assembly.
Click here
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
NG | ![]() | REPLACE RADIO RECEIVER ASSEMBLY |
|
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:
OK:
Master unit returns to normal.
OK | ![]() | REPLACE MALFUNCTIONING PARTS |
NG | ![]() | REPLACE RADIO RECEIVER ASSEMBLY |
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Occupant Classification System: Yaw Rate Sensor Module Malfunction (B1798,B1799)
DESCRIPTION The occupant detection ECU receives signals from the acceleration sensor (airbag sensor assembly*1 or yaw rate sensor assembly*2) and skid control ECU via CAN communication. DTC No. Detection Item DTC Detection Condition Trouble Area B1798 Yaw Rate Sensor Module Malfunctio ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Safety Connect System: GNSS Antenna Circuit Short to Ground (B15C111,B15C113)
DESCRIPTION These DTCs are stored when a malfunction occurs in the telephone and GPS antenna (for Roof Side) circuit. DTC No. Detection Item DTC Detection Condition Trouble Area B15C111 GNSS Antenna Circuit Short to Ground Current to the GNSS antenna is lower than the malfunction th ...