AVC-LAN Circuit [06/2018 - 09/2022]: Procedure
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2022 Lexus ES 350, 2022 Lexus ES 250, 2021 Lexus ES 350, 2021 Lexus ES 250, and 2020 Lexus ES 350. However, it is still accessible from the selected car via links, so may be relevant.
- INSPECT RADIO RECEIVER ASSEMBLY
- Remove the radio receiver assembly.
Refer to REMOVAL [06/2018 - 08/2020] , or refer to REMOVAL [08/2020 - 09/2022]
- Measure the resistance according to the value(s) in the table below.
*a Component without harness connected
(Radio Receiver Assembly)Standard Resistance
Tester Connection Condition Specified Condition 5 (TX1+) - 6 (TX1-) Always 60 to 80 Ω Result
Proceed to OK NG
Result:
NG
REPLACE RADIO RECEIVER ASSEMBLY. Refer to REMOVAL [06/2018 - 08/2020] , or refer to REMOVAL [08/2020 - 09/2022]
Result:
OK
See step 2
- Remove the radio receiver assembly.
- CHECK HARNESS AND CONNECTOR (AVC-LAN CIRCUIT)
- Disconnect the G5 radio receiver assembly connector.
- Disconnect the G22 multi-display assembly connector.
- Disconnect the G23 air conditioning control assembly connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition G5-5 (TX1+) - G22-7 (TX+) Always Below 1 Ω G5-6 (TX1-) - G22-19 (TX-) Always Below 1 Ω G5-5 (TX1+) or G22-7 (TX+) - Body ground Always 10 kΩ or higher G5-6 (TX1-) or- G22-19 (TX-) - Body ground Always 10 kΩ or higher G22-6 (TX1+) - G23-1 (TX1+) Always Below 1 Ω G22-18 (TX1-) - G23-2 (TX1-) Always Below 1 Ω G22-6 (TX1+) or G23-1 (TX1+) - Body ground Always 10 kΩ or higher G22-18 (TX1-) or G23-2 (TX1-) - Body ground Always 10 kΩ or higher Result
Proceed to OK NG
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 3
- INSPECT MALFUNCTIONING PARTS
- 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 return to normal.
Result
Proceed to OK NG
Result:
OK
REPLACE MALFUNCTIONING PARTS
Result:
NG
REPLACE RADIO RECEIVER ASSEMBLY. Refer to REMOVAL [06/2018 - 08/2020] , or refer to REMOVAL [08/2020 - 09/2022]
- Disconnect and reconnect each slave unit one by one until the master unit returns to normal.