PAC uPAC-STS Manual

Class 2
VPW J1850
Arbitration
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The uPAC-STS interface is a multi input media device compatible with select Cadillac STS
vehicles. The 2 inputs will support any of the following combinations: iPod/Auxiliary, iPod/
HD Radio (HD Radio sold separately) or Auxiliary/HD Radio (HD Radio sold separately).
The iPod input can be used as full control from the radio or full control from the iPod.
The uPAC-STS works with navigation and non-navigation radios. If a factory SAT tuner or
DVD video system is present, it will continue to operate as well. The optional HD Radio
tuner is part number uPAC-HDRT.
Please visit www.pac-audio.com for a complete list of supported vehicles.
Configuring the uPAC-STS (iPod and Auxiliary input as devices):
Before connecting the uPAC-STS to the vehicle place all four dipswitches in the up (Off) position.
Device 1 should be connected to the iPod cable.
Device 2 should be connected to the auxiliary input cable. If both the 3.5mm cable and RCA connections
are used make sure to only have one of the 2 sources powered at a time.
Note: If the optional HD Radio Tuner is used, refer to the uPAC-HDRT's connection manual for configuration and
operation instructions. The USB connection has no function at this time.
Connecting to the vehicle:
With the key off, plug the two 16 pin harnesses provided with the
uPAC-STS into the radio. Plug the original 16 pin harnesses into
the receptacle connectors provided with the uPAC-STS. Make sure
all other connectors (if any) are reconnected to the factory radio.
Plug the 24 pin micro-fit cable into the uPAC-STS blue box.
WAIT 30 seconds before turning the ignition key on to allow the
interface to syncronize with the vehicle and the radio.
Selecting the New Inputs:
The radio must be in any audio mode except for XM (Like AM or FM).
While in one of these modes, press the XM button. Within 4 seconds,
turn the rotary tune knob in the bottom right hand corner to scroll
through available sources (iPod or AUX). Once the desired input is
displayed, press the
are currently in SAT mode you will need to exit by pressing either the
AM or FM button and then press the XM button. If AUX is selected,
turning the rotary knob will display AUX 1 or AUX 2. Press the
select (AUX 1 = iPod no radio control and AUX 2 = Device 2).
J1850
EOD CRC
Class 2
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button to select the displayed mode. If you
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uPAC-STS
iPod and Auxiliary input
Interface with HD Radio Option for
Cadillac STS Radios
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Class 2 J1850
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