Toyota Sienna Service Manual: Radio Broadcast cannot be Received or Poor Reception
INSPECTION PROCEDURE
1 CHECK RADIO RECEIVER
- Check the radio's automatic station search function.
- Check the radio's automatic station search function
by activating it.
OK:
The radio's automatic station search function
works properly.
2 CONFIRM MODEL
Result

3 INSPECT RADIO RECEIVER ASSEMBLY

- Disconnect the radio receiver connector R7.
- Measure the voltage according to the value(s) in the
table below.
Standard voltage

4 CHECK OPTIONAL COMPONENTS
- Check optional components (sun-shade film, telephone
antenna, etc.).
- Check if any optional components, such as
sunshade film or telephone antenna that may
decrease reception capacity, are installed.
OK:
Optional components are installed.
NOTICE:
Do not remove any optional components
installed by the customer without his or her
consent.
5 CHECK RADIO RECEIVER

- Preparation for check
- Remove the antenna plug from the radio receiver.
- Check for noise
- Turn the ignition switch to the ACC position with the
radio receiver connector connected.
- Turn the radio on and put into AM mode.
- Place a screwdriver, thin wire, or other metal object
on the radio receiver's antenna jack and check that
noise can be heard from the speaker.
OK:
Noise occurs
6 CHECK GLASS ANTENNA

- Check for continuity of the antenna.
HINT:
Check for continuity at the center of each antenna wire
as shown in the illustration.
NOTICE:
When cleaning the glass, wipe it in the direction of
the wire with a soft dry cloth. Take care not to
damage the wire. Do not use detergents or glass
cleaners with abrasive ingredients. When measuring
voltage, wrap a piece of tin foil around the tip of the
negative probe and press the foil against the wire
with your finger, as shown in the illustration.
OK:
There is continuity in the antenna.
7 CHECK ANTENNA CORD
- Remove the antenna plug of the radio receiver and
antenna.
- Measure the resistance between the antenna and radio
receiver to check for an open circuit in the antenna cord.
Standard resistance:
Below 1 Ω
- Measure the resistance between the antenna cord and
body ground to check for a short circuit in the antenna
cord.
Standard resistance:
10 kΩ or higher
8 REPLACE AMPLIFIER ANTENNA ASSEMBLY
- Replace the amplifier antenna and check if radio
broadcasts can be received normally.
OK:
Radio broadcasts can be received.
REPLACE RADIO RECEIVER
9 CHECK OPTIONAL COMPONENTS
- Check optional components (sun-shade film, telephone
antenna, etc.).
- Check if any optional components, such as sunshade
film or telephone antenna that may decrease
reception capacity, are installed.
OK:
Optional components are installed.
NOTICE:
Do not remove any optional components
installed by the customer without his or her
consent.
10 CHECK RADIO RECEIVER

- Preparation for check
- Remove the antenna plug from the radio receiver.
- Check for noise
- Turn the ignition switch on (ACC) with the radio
receiver connector connected.
- Turn the radio on and put into AM mode.
- Place a screwdriver, thin wire, or other metal object
on the radio receiver's antenna jack and check that
noise can be heard from the speaker.
OK:
Noise occurs.
11 CHECK RADIO ANTENNA CO
- Remove the antenna plug of the radio receiver and
antenna.
- Measure the resistance between the antenna and radio
receiver to check for an open circuit in the radio antenna
cord.
Standard resistance:
Below 1 Ω
- Measure the resistance between the radio antenna cord
and body ground to check for a short circuit in the
antenna cord.
Standard resistance:
10 kΩ or higher
12 REPLACE ANTENNA POLE
- Replace antenna pole and check that it operated
normally.
OK:
The antenna pole operates normally.
REPLACE RADIO RECEIVER
INSPECTION PROCEDURE
1 CHECK CD
Check the CD.
OK:
The CD is clean.
HINT:
If dirt is on the CD surface, wipe it clean with a soft cloth
from the inside to the outside in a radial direct ...
INSPECTION PROCEDURE
1 CHECK AUDIO SETTINGS
Set "BASS", "MID", and "TREB" to the initial values and
check that sound is normal.
OK:
Malfunction disappears.
2 ...
Other materials:
Installation
1. INSTALL CENTER AIRBAG SENSOR ASSEMBLY
Check that the ignition switch is off.
Check that the battery negative (-) terminal is
disconnected.
CAUTION:
After disconnecting the negative battery
terminal, wait for at least 90 seconds before
starting the operation.
Temporar ...
Gyro Error
DTC 58-10 Gyro Error
DTC 80-10 Gyro Error
DESCRIPTION
DTC No.
DTC Detection Condition
Trouble Area
58-10
Ground short, power supply short, or open circuit in the
gyro signal
Gyro sensor
Radio and navigation assembly
80-10
...
Power back door system
PARTS LOCATION
...