Steering Wheel Control Interface for BMW Vehicles

Installation Guide

The 42XBM00C-0 allows for the retention of steering wheel controls and other vital features when installing an aftermarket unit. It features selectable dipswitches for dedicated applications, ensuring seamless integration.

Vehicle Application

Compatible with BMW vehicles:

• 3-Series (E46): 1998-2007
• 5-Series (E39): 1996-2004
• 7-Series (E38): 1994-2001
• X3 (E83): 2004-2010
• X5 (E53): 2000-2006
• Z4 (E85): 2002-2008

Compatible with Mini vehicles:

• Mini (R50/R53): 2001-2006
• Mini (R52): 2004-2008

For vehicles with Business OEM Head unit (40-Pin Quadlock or 17-Pin BMW Connector). Applicable for vehicles without Professional OEM Sat Nav and without OEM amplified systems.

Key Features

• Retain Steering Wheel Control Functionality
• Replace Factory Radio
• Software Updateable
• Remappable Buttons

Prior to Installation

Installation requires technical knowledge. Read the manual carefully. Select a dry location, free from heat sources. Use correct tools to prevent damage. ACV is not liable for issues arising from improper installation. Before proceeding, disconnect the negative battery terminal and remove the key from the ignition.

Interface Components

The interface package includes the main module, a 16-pin head unit connection lead, an 18-pin steering wheel harness connector, an ISO connector, and a USB-C port for software updates, along with various wiring harnesses and connectors.

Wiring and Configuration

Wiring Key

ISO Connector Wiring:

• 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 -

Flying Wire Wiring Key:

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

Outputs & Ratings: Standby Current <3mA, Operating Voltage 6V to 16V, Operating Temperature -20°C to 85°C (rated at 25°C).

Dipswitch Configuration

The interface features dipswitches (1-4) for configuring compatibility with various head units. Dipswitches 5 & 6 are reserved for vehicle-specific configurations.

Learning Modes

KEY1 and KEY2: Tailored for analog learning-style radios with a resistor chain for compatibility.

KEY1 and KEY2 EXTEND: Extends button presses to 2 seconds for easier programming, especially for steering wheels with short button presses. Not for normal use, only for teaching.

ANALOG SINGLE WIRE and ANALOG SINGLE WIRE EXTEND: Transmits all unique values through a single IR SWC wire, crucial for head units with only one learning input wire. Analog Extend mode functions identically to KEY1/KEY2 Extend but uses a single wire.

Connection Diagram Description

The SWC interface connects via several components:

• Head Unit Connection Lead: Features a 3.5mm jack plug for aftermarket stereos, with wires for Ground, Key 2, Key 1, and SWC IR.
• SWC Interface: Contains dipswitches (labeled 1-6) and a USB-C port for software updates.
• SWC Vehicle Harness: Includes a 16-pin harness connector and an 18-pin harness connector for interface connection. It also has a vehicle connector, with options for either a 17-pin or 40-pin harness (discard the unused one). Wire colors are illustrative and may differ.

Connection Guide

Before Installation

Essential to remove and disconnect the factory stereo. Refer to the vehicle owner's manual or seek professional assistance.

Setting the Dipswitches

Consult the dipswitch selection guide to select the appropriate configuration. Press a dipswitch downward to the 'ON' position. An example configuration for KENWOOD1 is provided.

[Diagram showing dipswitch settings 1-6, with an example configuration highlighted for KENWOOD1.]

Installation Steps

1. Connect the 16-PIN head unit connection lead and the 18-PIN steering wheel harness connectors to their respective ports on the interface.
2. Connect the head unit connection lead to the steering wheel remote input on the aftermarket stereo. Connection methods vary (3.5mm jack, SWC IR wire, or KEY1/KEY2 inputs). Refer to the stereo's manual for specifics.
3. Connect the power/speaker ISO connector from the interface to the aftermarket stereo's ISO connection. If the stereo lacks an ISO connector, refer to the "Wiring Key" on Page 2. Extra "flying" wires may exist for parking brake, reverse gear, and speed pulse.
4. Connect the vehicle-specific connectors from the interface harness to the vehicle harness.
5. Connect the flying wires on the harness to the rear of the stereo, if applicable.
6. Connect the antenna adapter to the vehicle's existing antenna connection.
7. If installing an aftermarket reverse camera, connect the yellow RCA from the harness to the camera's yellow RCA.
8. If installing a DAB antenna, connect the DAB aerial connector to the new stereo.
9. After connecting all wires and accessories, thoroughly test the stereo and steering wheel controls before reassembling the dashboard. If controls are unresponsive, inspect connections and check dipswitch settings. Repeat steps if necessary.

Steering Wheel Control Configuration

The steering wheel buttons can be reconfigured or assigned dual functions. Availability depends on the vehicle and aftermarket radio support. Buttons can be programmed for short and long presses. Custom configurations can be made via PC, MAC, or smartphone using the USB port. Button remapping instructions are available on the ACV website.

[Illustration of a car steering wheel with buttons labeled A through F, indicating their default functions: A: Volume Up, B: Volume Down, C: Track Up, D: Track Down, E: Hang Up, F: Pick Up (Short Press) / Voice (Long Press). Actual control configurations may vary by vehicle.]