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Pacific Accessory Corporation
Page 6
Rev: 4
Date:02022021
Advanced Amplifier Interface
for Select Toyota and Lexus Applications
AP4-TY13 R.2
Restoring Factory Settings
You can restore the interface to factory default settings by pressing and holding the programming button on the side of the
module until the status LEDs start blinking red. Once the LEDs start blinking red, release the button.
This reset will restore the following settings to their factory defaults:
•
Radio Beeps volume level
•
Enable / Disable Factory Beeps
•
Minimum volume level
•
Enable / Disable factory EQ
•
Factory EQ frequency
•
Factory EQ Q factor
Troubleshooting
1.
No audio - Check to see if LED 1 is illuminated. If not, cycle the ignition off and back on.
2.
Hiss at high amp gain - Set feature DIP switch 2 to the on (down) position to lower the output voltage of the AP4 to 4v. If you
still hear the hiss, lower your amp gains until the hiss is gone.
3. Cannot hear beeps when pressing buttons on the radio - Go to the Beep On / Off setting in the radio's settings menu and
make sure it is set to ON. If it is, set it to OFF and back to ON and test for beeps again. Next, set the beep volume using
process outlined in Setup and Configuration, or using the AmpPRO application. If you still do not hear beeps, be sure that
you are using the remote output from the AP4 to turn on your aftermarket amplifier.
4.
Low volume setting on radio is too loud - Set minimum volume using process outlined in Setup and Configuration, or using
the AmpPRO application.
5. Drastic volume difference between radio sources - The radio stores the volume of the radio source from the last time that
source was used. Readjust the volume of the individual sources to the same output level.
Action / Color
During Normal Operation
Solid Red
Module Active
Solid Green
Chime Volume Adjustment Mode
Solid Amber
Minimum Volume Adjustment Mode
Rapid Blink Any Color
DSP Activity
LED2
Blink Amber
USB Connection Detected
Both LEDs
Alternate Blinking Red Performing Memory Reset
LED Legend
LED 1
