User Manual

Pacic Accessory Corporation
®
| Ph. 866-931-8021 | [e-mail]
©2015 Pacic Accessory Corporation
www.pac-audio.com
Pacific Accessory Corporation
RP4.2-BM21
Radio Replacement &
Steering Wheel Control Interface
for Select CAN-Bus BMW Vehicles
Rev. 043015
Page 2
Default Steering Wheel Control Programming
IMPORTANT! The interface comes pre-programmed for all of the vehicles factory SWC functions and does not require
programming unless you wish to re-assign the SWC functions, utilize short press long press dual command functionality or assign
the programmable 12v output to a SWC button. The SWC can always be restored to default settings by pressing and releasing
the program button on the side of the interface once and waiting 7 seconds for the LED to ash 3 times.
In addition, there are 5 of the controls on the steering wheel that are mirrored to the iDrive controller. For instance the “+” button on
the steering wheel will do the same function as the “Up” button on the iDrive controller. Keep in mind that if one of these mirrored
steering wheel control buttons is re-assigned to another function it will also change the corresponding iDrive function. See Below
for a list of the functions that are mirrored between the steering wheel and the iDrive controller.
Installation Steps
1. The radio select dipswitches on the side of the interface must be adjusted to the proper radio
setting before plugging the interface into the vehicle.
2. Find a constant power source. BMW’s power management system causes the constant power wire behind the radio to
drop out after the key has been removed for 30 mins. This is OK for our module but not for the aftermarket radio. For your
convenience we have added a 16ft 16AWG constant power wire to the kit so that you can run constant power from the battery
to the aftermarket radio. The battery in BMW vehicles is normally located in the trunk area. Be sure to route this wire away
from any moving parts that may pierce or cut the wire.
3. Installation of the chime speaker (if required). If the vehicle has the factory telematics system (Bluetooth) you can use the
RP4.2-BM21-SPK-HAR to use the factory speaker mounted in the drivers kick panel to retain the factory warning chimes.
Simply disconnect the factory 3 pin connector from the speaker and connect the 3 pin connector from the RP4.2-BM21-SPK-
HAR, connect the other side (2 pin connector) to the RP4.2-BM21. If the vehicle does not come with the factory telematics
system then you will need to use the included speaker to retain the factory warning chimes.
4. If the vehicle has the HVAC recirculation button located on the steering wheel, and you wish to retain that feature, the brown
wire in the Interface’s connector 2 will need to be connected to constant +12v prior to connecting the module to the vehicle.
The Brown wire will come in the package disconnected which will default that button to control the aftermarket radio, and not
the HVAC.
5. Make all connections as described in the connection chart on page 1. Vehicles without a factory amplier: Cut the RCA
ends off of the speaker wires and connect the aftermarket radio’s front and rear speaker wires to the vehicle connector.
Vehicles with a factory amplier: Connect the RCA cables from the vehicle connector to the aftermarket radio’s front and
rear pre-amp outputs.
6. Connect the SWC wire to the aftermarket radio (aftermarket radio must support a wired remote input).
7. Once all connections have been made, plug the interface into the vehicle.
8. If you wish to reassign functions to the SWC, utilize short press long press dual command functionality, or assign the
programmable 12v output to a SWC button, follow the optional programming instructions on the next page.
DIP
1 2 3 4
ON
Alpine JVC Kenwood Clarion Pioneer/Other Sony Fusion
1 2 1 & 2 3 1, 2, & 3 4 1 & 4
Other = Advent, BOYO, Dual, Lightning Audio, Rockford Fosgate, Visteon
SET RADIO DIPSWITCHES (ON = DOWN)
Steering Wheel Controls
Steering Wheel iDrive Controller
Volume + Up
Volume - Down
Track + Right
Track - Left
Source/Diamond Select
Mirrored Functions