Hilmars-Audio 42XBM012-0 Steering Wheel Control Interface Installation Guide

: August 28, 2024
: HILMARS AUDIO

Hilmars-Audio 42XBM012-0 Steering Wheel Control Interface

INSTALLATION GUIDE

The 42XBM012-0 allows for the retention of the steering wheel controls as well as other vital features including the MOST Fibre-Optic amplified system when installing an aftermarket unit into the vehicle. This interface features selectable dipswitches for dedicated applications, simply refer to the provided table for the correct configuration ensuring seamless integration.

VEHICLE APPLICATION

BMW

1-Series (E81/E82/E87/E88) 2003 – 2011
3-Series (E90/E91/E92/E93) 2004 – 2011
5-Series (E60/E61) 2003 – 2010
X5 (E70) 2007 – 2013
X6 (E71/E72) 2008 – 2014

For vehicles equipped with Business
Professional Head Unit and Harmon Kardon System MOST OEM Amplified System

KEY FEATURES

RETAIN STEERING WHEEL CONTROL FUNCTIONALITY
REPLACE FACTORY RADIO
RETAINS THE MOST FIBRE-OPTIC AMPLIFIED SYSTEM
OUTPUTS FOR PARK BRAKE, REVERSE, SPEED PULSE ACC 12V & ILLUMINATION
SOFTWARE UPDATEABLE

PRIOR TO INSTALLATION

Installation requires a certain level of technical knowledge. Prior to installation, it is important to read the manual. Select a location for installation that is dry and free from heat sources. It is essential to use the correct tools during installation to prevent any damage to the vehicle or the product itself. Please note that we cannot be held liable for any issues arising from improper installation.

Before proceeding with installation, disconnect the negative battery terminal and ensure the key is removed from the ignition.

WIRING KEY

ISO CONNECTOR WIRING KEY

Purple Right Rear Speaker +
Purple/Black Right Rear Speaker –
Green Left Rear Speaker +
Green/Black Left Rear Speaker

Grey Right Front Speaker +
Grey/Black Right Front Speaker –
White Left Front Speaker +
White/Black Left Front Speaker –

Yellow Permanent 12V
Black Ground
Red Ignition 12V
Orange Illumination

FLYING WIRE MWIRING KEY OUTPUTS & RATINGS

Pink Speed Pulse – 0 to 12V Square Wave @ 1Hz/Kph
Green Park Brake

Purple/White Reverse Gear – 250mA
Orange Illumination – 250mA

Red/White Acc 12V – 250mA
Yellow RCA Camera

Standby Current <3mA

Operating Voltage 6V to 16V

Operating Temperature -20C to 85C

DIPSWITCH CONFIGURATION

SWC MOST INTERFACE

SOFTWARE UPDATE

The interface software can be updated using the two micro USB ports on the device. These ports serve specific purposes: one is ded-icated to updating the MOST software, while the other is for updating the CAN Bus software. By connecting to these ports, users can ensure their interface remains up-to- date, maintaining optimal performance and compatibility with their vehicle’s systems.
Software update instructions can be found in a separate guide on our website.

CONNECTION GUIDE

BEFORE INSTALLATION

Prior to installing the interface, it is essential to remove and disconnect the factory stereo. For guidance on this process, please refer to the vehicle owner’s manual/handbook or seek assistance from a professional.

SETTING THE DIPSWITCHES

This interface includes a set of dipswitches. Consult the dipswitch selection guide to select the appropriate configuration. To activate a dipswitch, press it downward into the ‘ON’ position.

INSTALLATION

1. Take the interface, then connect the head unit connection lead and the steering wheel harness connectors to their respective ports.
2. Connect the head unit connection lead to the steering wheel remote input on the rear side of the aftermarket stereo.
Connection methods vary based on the stereo brand, utilising either a 3.5mm jack connector or brown SWC IR wire .

For specific connection guidance, refer to your aftermarket stereo’s installation manual if not clearly labelled on the stereo harness.

3. Connect the power/speaker ISO connector from the interface to the corresponding power/speaker ISO connection on the aftermarket stereo.

For aftermarket stereos lacking an ISO connector, refer to the “Wiring Key” on Page 2 for guidance on connecting wires. Certain interfaces may also include extra “flying” wires for additional functionalities such as parking brake trigger, reverse gear, and speed pulse. Further information on these wires is available in the “Flying Wire Wiring Key” section.

4. Connect the vehicle-specific connectors from the interface harness to the corresponding connectors on the vehicle harness.
5. Connect the flying wires on the harness to the rear of the stereo (iff applicable).
6. Connect the antenna adapter to the vehicle’s existing connection at the rear of the aftermarket stereo.
7. When installing an aftermarket reverse camera, connect the yellow RCA from the harness to the yellow RCA of the aftermarket camera. (If supported by the interface and vehicle)
8. When installing a DAB antenna, ensure to connect the DAB aerial connector to the rear of the new stereo.
9. After connecting all wires (along with any additional accessories), it’s crucial to thoroughly test the stereo and steering wheel controls before reassembling the dashboard. If steering wheel controls are unresponsive, inspect connections and check dipswitch settings. Repeat the connection process if necessary, following the outlined steps.

INSTALLING THE FIBRE-OPTIC CABLE

To adapt to the MOST interface, you must remove the original fibre-optic connection.

1. Place the amplifier interface into the black connector housing provided with this kit and snap it into place. (Image A)
2. From the original fibre-optic connector: Using a pick tool, carefully pull the tab toward the outer edge of the connector housing. Gently remove the grey fibre-optic insert from the connector. (Image B)
3. From the MOST interface: Push the tab toward the grey dust cover. Using needle-nose pliers, remove the grey dust cover. Insert the factory fibre-optic cables into the MOST interface’s black connector housing in place of the grey connector. (Image C)

STEERING WHEEL CONTROL CONFIGURATION

A. Volume Up
B. Volume Down
C. Source
D. Track Up
E. Track Down
F. Voice
G. Phone Pick Up (Short Press); Phone Hang Up (Long Press)

The provided diagram, while meticulously researched, serves as an example only. Actual steering wheel control configurations may vary dependant on each vehicle.

CONNECTION DIAGRAM

HEAD UNIT CONNECTION LEAD

MOST SWC INTERFACE

SWC VEHICLE HARNESS

Product Specifications

Product Name: Steering Wheel Control Interface for BMW Vehicles
Model Number: 42XBM012-0
Compatibility: BMW vehicles – 1-Series, 3-Series, 5-Series, X5, X6 with MOST Fibre-Optic amplified system