AVC-LAN Plus Circuit

NAVIGATION: NAVIGATION SYSTEM (for HDD): AVC-LAN Plus Circuit

AVC-LAN Plus Circuit

DESCRIPTION

The navigation system (for HDD) uses AVC-LAN plus communication between components when performing sound library recording, and when displaying the satellite radio traffic information screen.
If a +B short, ground short, or other malfunction occurs in the AVC-LAN plus circuit, communication is stopped and the system does not operate normally.

WIRING DIAGRAM









INSPECTION PROCEDURE
NOTE: After replacing the satellite radio tuner of vehicles subscribed to pay-type satellite radio broadcasts, the ID registration is necessary.

PROCEDURE

1. CHECK AUDIO SYSTEM
(a) Check the audio system model.

Result:





B -- CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION ASSEMBLY - SATELLITE RADIO TUNER)
A -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION ASSEMBLY - RADIO RECEIVER AND SATELLITE RADIO TUNER)





(a) Disconnect the L63 display connector.
(b) Disconnect the L54 receiver connector.
(c) Disconnect the R28 tuner connector (w/ SDARS system)
(d) Measure the resistance according to the value(s) in the table below.
Standard resistance:





HINT: *1: w/ SDARS System
*2: w/o SDARS System

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. INSPECT RADIO RECEIVER ASSEMBLY





(a) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPLACE RADIO RECEIVER ASSEMBLY
OK -- Continue to next step.
4. CHECK AUDIO SYSTEM
(a) Check if the audio system can receive satellite radio broadcasts.

Result:





B -- INSPECT DISPLAY AND NAVIGATION ASSEMBLY
A -- INSPECT SATELLITE RADIO TUNER
5. CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION ASSEMBLY - SATELLITE RADIO TUNER)





(a) Disconnect the L63 display connector.
(b) Disconnect the R28 tuner connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
6. INSPECT SATELLITE RADIO TUNER





(a) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPLACE SATELLITE RADIO TUNER ASSEMBLY
OK -- Continue to next step.
7. INSPECT DISPLAY AND NAVIGATION ASSEMBLY





(a) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPLACE DISPLAY AND NAVIGATION ASSEMBLY
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE