DESCRIPTION
Each navigation system component connected to the AVC-LAN (communication bus) transfers switch signals using the audio visual communication local area network.
If a short to +B or short to ground occurs in the AVC-LAN, the audio system will not function normally because communication is not possible.
PROCEDURE
- Click here
INSPECT NAVIGATION RECEIVER ASSEMBLY
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Remove the navigation receiver assembly (Click here).
-
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 Table 1. Text in Illustration *a Component without harness connected
(Navigation Receiver Assembly)
- OKClick here
- NGClick here
-
- Click here
CHECK HARNESS AND CONNECTOR (AVC-LAN CIRCUIT)
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Disconnect the h61 navigation receiver assembly connector.
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Disconnect the H63 stereo component amplifier assembly connector.
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Measure the resistance according to the value(s) in the table below.
Standard Resistance Tester Connection Condition Specified Condition H56-7 (TX1+) - H63-8 (TX+) Always Below 1 Ω H56-8 (TX1-) - H63-7 (TX-) Always Below 1 Ω H56-7 (TX1+) - Body ground Always 10 kΩ or higher H56-8 (TX1-) - Body ground Always 10 kΩ or higher
- OKClick here
- NGClick here
-
- Click here
INSPECT MALFUNCTIONING PARTS
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Disconnect and reconnect each slave unit one by one until the master unit returns to normal operation.
Tip:
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Check all slave units.
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When disconnecting a slave unit causes the master unit to return to normal operation, this indicates that the slave unit is malfunctioning. Replace the malfunctioning slave unit.
OK Master unit returns to normal operation. -
- OKClick here
- NGClick here
-
- Click here
REPLACE NAVIGATION RECEIVER ASSEMBLYClick here
- Click here
REPAIR OR REPLACE HARNESS OR CONNECTOR
- Click here
REPLACE MALFUNCTIONING PARTS