Lexus 2004 GX470 Owner's Manual page 271

AUDIO
(i) If the player malfunctions
If the player or another unit equipped with the player
malfunctions, your audio system will display one of the four
following error messages.
If "WAIT" appears on the display: It indicates that the inside
of the player unit may be too hot due to the very high ambient
temperature. Remove the disc from the player and allow the
player to cool down.
If "ERROR 1" appears on the display: It indicates that the
disc is dirty, damaged, or it was inserted up-side down. Clean
the disc or insert it correctly.
If "ERROR 3" or "ERROR 4" appears on the display: It
indicates there is a trouble inside the system. Eject the disc.
If the malfunction is not rectified: Take your vehicle to your
Lexus dealer.
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Audio remote controls (steering switches)
The switches are installed on the left side of the steering wheel.
"MODE" switch: Use this switch to turn on or off the audio
system, or change the audio mode.
D To turn on the system, push the switch briefly. To turn off the
system, push and hold the switch until you hear a beep.
D To change the audio mode, turn on the system and push the
switch briefly. If a tape or compact disc is not inserted, the
"TAPE" or "CD" mode is skipped.
"+ -" switch: Use this switch to adjust the volume.
To increase the volume, push the "+" side. To decrease the
volume, push the "–" side. The volume continues to increase
or decrease while the switch is being pressed.
Finish