Toyota Sienna Service Manual: Stereo Component Amplifier Communication Error
INSPECTION PROCEDURE
1 IDENTIFY THE COMPONENT SHOWN BY THE SUB-CODE

- Enter the diagnostic mode.
- Press the "LAN Mon" switch to change to "LAN Monitor"
mode.
- Identify the component shown by the sub-code.
HINT:
- "110 (multi-display)" is the component shown by the
sub-code in the example shown in the illustration.
- The sub-code will be indicated by its physical
address.
- For the component list, refer to "DIAGNOSIS DISPLAY DETAILED
DESCRIPTION".
2 CHECK POWER SOURCE CIRCUIT OF COMPONENT SHOWN BY SUB-CODE
- Inspect the power source circuit of the component shown
by the sub-code.
If the power source circuit is operating normally, proceed
to the next step.
Component Table:

3 CHECK RADIO AND NAVIGATION ASSEMBLY

- Disconnect the radio and navigation assembly
connectors.
- Measure the resistance according to the value(s) in the
table below.
Standard resistance

4 CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - COMPONENT
SHOWN BY SUB-CODE)
HINT:
- Start the check from the circuit that is near the component
shown by the sub-code first.
- For details of the connectors, refer to "TERMINALS OF ECU".
- Referring to the AVC-LAN wiring diagram below, check
the AVC-LAN circuit between the stereo component
amplifier and the component shown by the sub-code.
- Disconnect all connectors between the stereo
component amplifier and the component shown by
sub-code.
- Check for an open or short in the AVC-LAN circuit
between the stereo component amplifier and the
component shown by the sub-code.

OK:
There is no open or short circuit.
5 REPLACE COMPONENT SHOWN BY SUB-CODE
- Replace the component shown by the sub-code with a
normal one and check if the same problem occurs again.
OK:
Same problem does not occur
END
DESCRIPTION
This circuit sends a microphone signal from the microphone to the radio and
navigation assembly.
It also supplies power from the radio and navigation assembly to the microphone.
WIR ...
INSPECTION PROCEDURE
1 IDENTIFY THE COMPONENT SHOWN BY THE SUB-CODE
Enter the diagnostic mode.
Press the "LAN Mon" switch to change to "LAN Monitor"
mode.
&nbs ...
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Road test
1. PROBLEM SYMPTOM CONFIRMATION
(a) Based on the result of the customer problem
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