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AP4-CH41 (R.2)
Restoring Factory Settings
Interface Reset
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:
•
Chime volume level
•
Enable / Disable Factory Chimes
•
Minimum volume level
Restore Radio to Non-Amplified
If the AP4-CH41 was installed to a factory non-amplified vehicle, the radio was programmed to output a pre-amplified audio signal
to the AP4. To restore the radio back to non-amplified programming, follow the steps below.
1.
Remove the AP4-CH41 module and harness and re-connect the OEM radio connections back to factory.
2.
Do 2 full sleep cycles (See page 5, "Sleep Cycle Procedure")
3.
Test the radio to verify the vehicle was successfully restored.
a. Test that you have audio signals coming through both the front and rear channels.
b. Test the audio is variable with the radio's volume knob
c. If the audio is still only on the rear channels and does not change with the volume knob, repeat the sleep cycle process
Troubleshooting
1. 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.
2. Cannot hear uConnect or nav voice - Use the volume knob while either of these voice prompts are active to adjust voice
volume.
3. Cannot hear chimes - Set chime volume using process outlined in Setup and Configuration, or using the AmpPRO app. If
you still do not hear chimes, 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 PC app.
5. If for any reason the AmpPRO module becomes unresponsive, or will not power up with the key on, you can always reset the
interface by turning the key to the ignition position, then pressing and holding the Volume Down button on the factory SWC
for 12 seconds until a tone is heard.
6. LED 1 is lit up red, but there is no audio - You have installed the AmpPRO into a non-amplified vehicle. You must have DIP
switch 4 on for this scenario
7. Audio is only playing out of the rear speakers and the volume knob does not work - You have re-configured the radio in a
non-amplified vehicle and still have the cabin speakers connected to the factory radio. Aftermarket amplification on the cabin
speakers must be used in this scenario.
LED 1
LED 2
Both LEDs
Pacific Accessory Corporation
Action / Color
Solid Red
Solid Green
Solid Amber
Rapid Blink Any Color
Blink Amber
Alternate Blinking Red
Alternate Blinking Amber
Alternate Blinking Green
© 2022 AAMP Global. All rights reserved. PAC is a Power Brand of AAMP Global.
•
Enable / Disable factory EQ
•
Factory EQ frequency
•
Factory EQ Q factor
LED Legend
During Normal Operation
Module Active
Chime Volume Adjustment Mode
Minimum Volume Adjustment Mode
DSP Activity
USB Connection Detected
Programming Button Being Held: Performing EPROM Reset
No Action From User: Vehicle Data-Bus Going to Sleep
Programming Button Being Held: Entering Radio Reset
Performing Radio Reset
Advanced Amplifier Interface for
Chrysler / Dodge / Jeep / RAM
Rev. V13
Date: 062322
Page 6
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