TOYOTA 86120-YZA59 - Manual (Page 29)

English | 29
What might seem to be a malfunction in your unit
may just be the result of slight misoperation or
miswiring. Before calling service, first check the
following table for possible problems.
General
? The power does not turn ON.
✔ The fuse has blown.
☞ After checking for short circuits in the wires,
replace the fuse with one with the same
rating.
? There’s a source you can’t switch.
✔ There’s no media inserted.
☞ Set the media you want to listen to. If there’s
no media in this unit, you can’t switch to each
source.
✔ The Disc changer isn’t connected.
☞ Connect the Disc changer. If the Disc changer
isn’t connected to it’s input terminal, you can’t
switch to an external disc source.
?
The memory is erased when the ignition is
turned OFF.
✔ The ignition and battery wire are incorrectly
connected.
☞ Connect the wire correctly, referring to the
section on <Connecting Wires to Terminals>
(page 27).
?
The TEL mute function does not work.
✔ The TEL mute wire is not connected properly.
☞ Connect the wire correctly, referring to the
section on <Connecting Wires to Terminals>
(page 27).
?
The TEL mute function turns ON even though the
TEL mute wire is not connected.
✔ The TEL mute wire is touching a metal part of the
car.
☞ Pull the TEL mute wire away from the metal
part of the car.
? Even if Loudness is turned ON, high-pitched tone
isn’t compensated for.
✔ Tuner source is selected.
☞ High-pitched tone isn’t compensated for when
in Tuner source.
? No sound can be heard, or the volume is low.
✔ The fader or balance settings are set all the way to
one side.
☞ Center the fader and balance settings.
✔ The input/output wires or wiring harness are
connected incorrectly.
☞ Reconnect the input/output wires or the
wiring harness correctly. See the section on
<Connecting Wires to Terminals> (page 27).
✔ The values of Volume offset are low.
☞ Turn up the Volume offset, referring to the
section on <Audio Setup> (page 9).
✔ The <Built-in Amp Setting> (page 22) is OFF.
☞ Turn it ON.
?
The sound quality is poor or distorted.
✔ One of the speaker wires is being pinched by a
screw in the car.
☞ Check the speaker wiring.
✔ The speakers are not wired correctly.
☞ Reconnect the speaker wires so that each
output terminal is connected to a different
speaker.
? The Touch Sensor Tone doesn’t sound.
✔ The preout jack is being used.
☞ The Touch Sensor Tone can’t be output from
the preout jack.
?
The Dimmer function doesn’t work.
✔ The Dimmer wire isn’t connected correctly.
☞ Check the Dimmer wire connection.
✔ The <Dimmer> (page 21) is OFF.
☞ Turn it ON.
? The display blacks out while scrolling.
✔ <Display Illumination Control> is set to OFF.
☞ Refer to <Display Illumination Control> (page
21).
Tuner source
?
Radio reception is poor.
✔ The car antenna is not extended.
☞ Pull the antenna out all the way.
✔ The antenna control wire is not connected.
☞ Connect the wire correctly, referring to the
section on <Connecting Wires to Terminals>
(page 27).
? The desired frequency can’t be entered with the
Direct Access Tuning.
✔ A station that can’t be received is being entered.
☞ Enter a station that can be received.
✔ You’re trying to enter a frequency with a 0.01 MHz
unit.
☞ What can be designated in the FM band is to
0.1 MHz.
Troubleshooting Guide