DESCRIPTION
Each unit of the navigation 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 navigation system will not function normally because communication is not possible.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
HINT:
The navigation receiver assembly is the master unit.
PROCEDURE
1. |
INSPECT NAVIGATION RECEIVER ASSEMBLY |
(a) Remove the navigation receiver assembly (See page
|
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
7 (TX1+) - 8 (TX1-) |
Always |
60 to 80 Ω |
*a |
Component without harness connected (Navigation Receiver Assembly) |
NG | ![]() |
REPLACE NAVIGATION RECEIVER ASSEMBLY |
|
2. |
CHECK HARNESS AND CONNECTOR (AVC-LAN CIRCUIT) |
(a) Disconnect the E40 navigation receiver assembly connector.
(b) Disconnect the E14 stereo component amplifier assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
E14-8 (TX+) - E40-7 (TX1+) |
Always |
Below 1 Ω |
E14-7 (TX-) - E40-8 (TX1-) |
Always |
Below 1 Ω |
E14-8 (TX+) - Body ground |
Always |
10 kΩ or higher |
E14-7 (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 NAVIGATION RECEIVER ASSEMBLY |
Components
COMPONENTS
ILLUSTRATION
ILLUSTRATION
ILLUSTRATION
ILLUSTRATION
ILLUSTRATION
ILLUSTRATION
ILLUSTRATION
ILLUSTRATION
...
Speaker Circuit
DESCRIPTION
If there is a short in a speaker circuit, the radio and display receiver
assembly detects it and stops output to the speakers.
Thus sound cannot be heard from the speakers even if there is no malfunction
in the radio and display ...
SRS Warning Light Remains ON
DESCRIPTION
The SRS warning light is located on the combination meter assembly.
When the SRS is normal, the SRS warning light comes on for approximately 6 seconds
after the ignition switch is turned from off to ON, and then goes off automatically.
If ther ...