PAC AP4-TY13 Quick Start Manual Download Page 6

 © 2019 AAMP Global. All rights reserved. PAC is a Power Brand of AAMP Global.

PAC-audio.com

Pacific Accessory Corporation

Page 6

Rev: V3

Date:062419

Advanced Amplifier Interface 

for Select Toyota Applications

AP4-TY13

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

Reviews: