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 ...
Other materials:
Identification information
VEHICLE IDENTIFICATION AND SERIAL NUMBERS
1. VEHICLE IDENTIFICATION NUMBER
(a) The vehicle identification number is stamped on the
vehicle identification number plate and the
certification label, as shown in the illustration.
A:
Vehicle Identification Number Plate
B:
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Power steering
Sst
Recommended tools
EQUIPMENT
LUBRICANT
SSM
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Inspection
1. INSPECT PACK CLEARANCE OF FORWARD CLUTCH
(a) Install the forward clutch on the oil pump.
NOTICE:
Be careful not to damage the oil seal ring of oil
pump.
b) Using a dial indicator, measure the forward clutch
pack clearance while applying and releasing
compressed air (392 kPa, 4.0 kgf/cm ...