PAC AP4-TY12 Manual Download Page 2

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Rev. 111317

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1.  Turn the ignition on. LED 1 on the interface will turn on and the +12v remote output will turn on.
2.  Set the amp gain(s) to the desired level. We recommend using an oscilliscope and test tones to set the amp gain(s). Please 

refer to the MECP Advanced study guide (p. 360) if you are unfamiliar with this process.

3.  Check volume, balance, fade and EQ settings.
4.  If you would like to adjust the radio's beep volume or minimum volume, do so using one of the methods outlined below. If 

you are happy with the default levels, no adjustments are necessary.

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You can manually set the level of the factory radio beeps using the programming button on the side of the interface. If you would 
like to set the beep volume using the PC app please proceed to the PC App section.

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Installation 

1.  Remove factory radio.
2.  Disconnect the 28-pin harness, the 10-pin harness and the 6-pin harness from the radio.
3.  Connect AmpPRO harnesses to vehicle harnesses.
4.  Connect AmpPRO harnesses to factory radio.
5.  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 5 for more details.

c.  DIP switches 3 and 4 are 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. 

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10.  Initially, if the beep through the AP4-TY12 does not match the on / off selection through the radio, cycle the beep to the 

opposite setting and back, then test again.

11.  The Yellow / Black "Mute Input from Telematics" wire will be used in conjunction with the Safety Connect / Lexus Enform 

(SOS) Retention. See the Tech Brief "AP4-TY12 SOS Retention" at PAC-audio.com for detailed instructions.

12.   The Brown "Mute Input From Navigation" is a spare mute lead that can be used for custom applications.  The audio will be 

muted whenever the Brown wire is supplied a ground.

DIP

1 2 3 4

ON

Two Channel Mode

5v / 4v Preout

Not Used

Not Used

1

2

3

4

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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

Summary of Contents for AP4-TY12

Page 1: ...radio s beep setting must be enabled on the factory radio in order to hear the audible tones when making selections through the radio 8 Initially if the beep through the AP4 TY12 does not match the o...

Page 2: ...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 5...

Page 3: ...would like to set the minimum volume using the AmpPRO app please proceed to the AmpPRO App section 3 6 127 HYHO FRQWURO NQRE PXVW EH FRQQHFWHG WR WKH PRGXOH LQ RUGHU WR VHW WKH 0LQLPXP 9ROXPH 6HWWLQJ...

Page 4: ...enable disable the 3 band factory EQ DVV 0LG 7UHEOH UHT 4 DFWRU This allows you to set the center frequency that will be adjusted when setting the 3 band factory EQ as well as the Q Factor for each fr...

Page 5: ...ur 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 O...

Page 6: ...module This telematics module is what creates the audio for the SOS system Voice Prompts etc There is an analog mute wire that runs from the SOS module to the factory amp and when the SOS is triggered...

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Page 8: ...DNHU ZLUHV WKHQ XVH WKH IURQW ULJKW VSHDNHU RXWSXW IURP WKH 6DIHW RQQHFW 0RGXOH WR FRQQHFW WR WKH GRRU VSHDNHU WKDW QHHGV WR EH SRZHUHG E WKH DIWHUPDUNHW DPSOL HU 0HWKRG FDQ EH VXEVWLWXWHG IRU HDVH RI...

Page 9: ...KHP RXW WHQG D VSHDNHU ZLUH IURP WKH 6DIHW RQQHFW DXGLR RXWSXW ZLUHV WR DQ H WHUQDO RKP VSHDNHU DQG KLGH LW LQ D SODFH ZKHUH LW ZLOO EH DXGLEOH FRPPRQO XQGHU WKH GDVKERDUG RQ WKH GULYHU V VLGH RI WKH...

Page 10: ...17 Lt Green Prius 2010 2011 Under Front Right Seat In Dash Below Radio 38 Pin Connector Pin 2 Lt Green Pin 3 Blue 38 Pin Connector Pin 5 Lt Green Pin 6 Blue 38 Pin Connector Pin 17 Green Prius 2016 20...

Page 11: ...or Pin 17 Black IS250 IS350 2010 2013 Right Rear Side in Rear Cargo Area Right Side of Dash Behind Glovebox 38 Pin Connector Pin 2 Blue Pin 3 Lt Green 38 Pin Connector Pin 5 Lt Green Pin 6 Red 38 Pin...

Page 12: ...ct Module Output Audio Telematics Mute Trigger RX Series 2010 2015 Under Floor Right Front Side of Luggage Compartment On Floor Below Center Console 38 Pin Connector Pin 2 Red Pin 3 Pink 38 Pin Connec...

Page 13: ...Bus Simplifies amplifier installation in data bus controlled factory sound systems Provides variable volume fade balance bass mid and treble audio settings Retains warning chimes navigation prompts Bl...

Page 14: ...play t 2 _ r 1 S ub A u di_ o___ i harness prov1des aud10 _ __ from yow factory rad1o I Original Factory Amplifier I ___ _ I _ Optional TOSUNK output for other I DSP processor or amplifier options vw...

Page 15: ...6 It lU JJ 1111t...

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