PAC AP4-TY13 Quick Start Manual Download Page 2

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

PAC-audio.com

Pacific Accessory Corporation

Page 2

Rev: V3

Date:062419

Advanced Amplifier Interface 

for Select Toyota Applications

AP4-TY13

Installation 

1. 

To gain access to the amplifier, reposition the left front seat forward 

and to the highest position.

2. 

Locate the factory amplifier cover, remove the 3 push pins that 

secure the cover into place, and remove the cover to gain access to 

the amplifier (Fig. 1).

3.  Disconnect the 30-pin harness and the 24-pin harness from the 

amplifier. To unplug the 30-pin, you must press the inner release tab  

and pull the connector's outer release tab at the same time (Fig. 2).

4.  Connect the AmpPRO harnesses to the vehicle harnesses.

5. 

Connect the AmpPRO harnesses to the factory amplifier.

6.  Set any feature DIP switches that apply to your install.

a.  DIP switch 1 is used for two channel mode. In this mode, both 

the TOSLINK and front RCA outputs (1 and 2) become non-

fading outputs.

b.  Set DIP switch 2 on (down) to lower the RCA output voltage to 

4v. Leave DIP switch 2 off (up) to keep the RCA output voltage at 

5v. See troubleshooting section on page 6 for more details.

c.  Set DIP switch 3 on (down) only if the output of the AP4 is too 

low. Doing this will give you a +8 dB boost on the INPUT of the 

module.

d.  DIP switch 4 is not used and should remain off (up).

6.  If you are using the APA-TOS1 (sold separately) refer to the 

instructions included with that product for its installation.

7.  Connect the AmpPRO harness to the module.

8.  Connect the level control knob to the module and install in an 

accessible location.

9.  Connect the signal cables and remote input from the aftermarket 

amplifier.

10. Initially, if the beep through the AP4-TY13 does not match the       

on / off selection through the radio, cycle the beep to the opposite 

setting and back, then test again.

11.  See the Tech Brief "AP4-TY SOS Retention" at PAC-audio.com 

for detailed instructions for retaining SOS. The Yellow / Black 

connections are not necessary when using the AP4-TY13.

DIP

1 2 3 4

ON

Two Channel Mode

5v / 4v Preout

Troubleshooting

Not Used

1

2

3

4

Set DIP switches to the ON position to activate the corresponding features. 

Set DIP switches to the OFF position for any features that are not desired. 

Module Layout

LED 1

Interface  Connector 1

Expansion Port

TOSLINK Output

(APA-TOS1 sold separately)

Programming Button

Feature Select 

DIP switches

Front Output

Ch. 1(L) and 2(R)

Non-Fading Level Control 

Knob Connection

USB Connection

Rear Output

Ch. 3(L) and 4(R)

Non-Fading Output

Ch. 5(L) and 6(R)

LED 2

Fig. 1

Fig. 2

24 - Pin

30 - Pin

Press Inner Release Tab

Pull Outer Release Tab

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