ACV 42XBMOOC-O Steering Wheel Control Interface
This document provides installation instructions for the ACV 42XBMOOC-O, an interface designed to retain steering wheel controls and other vital features when installing an aftermarket stereo system in compatible vehicles.
Vehicle Application
This interface is compatible with the following BMW and Mini models:
| Vehicle Model | Year Range |
|---|---|
| BMW 3-Series (E46) | 1998 - 2007 |
| BMW 5-Series (E39) | 1996 - 2004 |
| BMW 7-Series (E38) | 1994 - 2001 |
| BMW X3 (E83) | 2004 - 2010 |
| BMW X5 (E53) | 2000 - 2006 |
| BMW Z4 (E85) | 2002 - 2008 |
| Mini (R50/R53) | 2001 - 2006 |
| Mini (R52) | 2004 - 2008 |
Note: For vehicles with Business OEM Head unit (40-Pin Quadlock or 17-Pin BMW Connector). Not for vehicles with Professional OEM Sat Nav or 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 this manual carefully before proceeding. Choose a dry installation location away from heat sources. Use appropriate tools to prevent damage. ACV is not liable for issues arising from improper installation. Before starting, disconnect the negative battery terminal and remove the ignition key.
Wiring Key
ISO Connector Wiring Key:
| Color | Function | Color | Function |
|---|---|---|---|
| Purple | Right Rear Speaker + | Grey | Right Front Speaker + |
| Purple/Black | Right Rear Speaker - | Grey/Black | Right Front Speaker - |
| Green | Left Rear Speaker + | White | Left Front Speaker + |
| Green/Black | Left Rear Speaker - | White/Black | Left Front Speaker - |
Flying Wire Wiring Key Outputs & Ratings:
| Color | Function | Rating/Details | Color | Function | Rating/Details |
|---|---|---|---|---|---|
| Yellow | Permanent 12V | - | Pink | Speed Pulse | 0 to 12V Square Wave @ 1Hz/Kph |
| Black | Ground | - | Green | Park Brake | - |
| Red | Ignition 12V | - | Purple/White | Reverse Gear | 250mA |
| Orange | Illumination | - | Orange | Illumination | 250mA |
| Red/White | Accessory 12V | 250mA | Yellow RCA | Camera | - |
| Standby Current <3mA | Operating Voltage 6V to 16V | ||||
| Operating Temperature -20°C to 85°C (rated at 25°C) | |||||
Dipswitch Configuration
| Manufacturer | System | Dipswitch Configuration | Connection | |||
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | |||
| RESERVED | NA | OFF | OFF | OFF | OFF | SOFTWARE UPDATE MODE |
| Alpine | IR DATA | OFF | ON | OFF | OFF | MALE 3.5MM JACK |
| Analog Single Extend | Analog | ON | ON | ON | ON | BROWN SWC IR |
| Analog Single Wire | Analog | ON | ON | ON | OFF | BROWN SWC IR |
| Clarion | IR DATA | ON | OFF | OFF | ON | MALE 3.5MM JACK |
| Custom | IR DATA | ON | OFF | ON | OFF | HEAD UNIT DEPENDANT |
| Grundig | IR DATA | OFF | ON | OFF | ON | BROWN SWC IR |
| JVC | IR DATA | OFF | OFF | ON | OFF | BROWN SWC IR |
| Kenwood 1 | IR DATA | ON | OFF | OFF | OFF | BROWN SWC IR |
| Kenwood 2 | IR DATA | ON | ON | OFF | OFF | BROWN SWC IR |
| Key 1 / Key 2 | Analog | OFF | ON | ON | OFF | KEY1/ KEY 2 WIRES |
| Key 1 / Key 2 Extend | Analog | OFF | ON | ON | ON | KEY1/ KEY 2 WIRES |
| Philips | IR DATA | OFF | ON | OFF | ON | BROWN SWC IR |
| Pioneer 1 | Analog | OFF | OFF | OFF | ON | MALE 3.5MM JACK |
| Pioneer 2 | Analog | OFF | OFF | ON | ON | MALE 3.5MM JACK |
| Sony | Analog | ON | OFF | ON | ON | MALE 3.5MM JACK |
| Zenec | IR DATA | ON | ON | OFF | ON | BROWN SWC IR |
Dipswitch 5 & 6: Reserved for vehicle-specific configuration.
Analog Modes
KEY1 and KEY2
These modes are for analog learning-style radios. The SWC module uses a resistor chain for compatibility. Holding buttons for 2 seconds during learning is extended by this feature for easier programming, especially for scroll-wheel buttons. This 'Extend' mode is for teaching only, not normal use.
KEY1 and KEY2 EXTEND
This feature automatically prolongs each button press during the learning process, simplifying head unit programming for devices with scroll-wheel steering wheel buttons where a 2-second press is not feasible. It is intended for the teaching process only.
ANALOG SINGLE WIRE and ANALOG SINGLE WIRE EXTEND
This functions similarly to KEY1 and KEY2 but transmits all unique values through a single IR SWC wire. This is essential for learning-style head units with only one learning input wire. The Analog Extend mode functions identically to the KEY1 and KEY2 Extend system but uses a single wire for transmission.
SWC Interface
The interface includes a 16-pin head unit connection lead, an 18-pin steering wheel harness connector, and dipswitches for configuration. It also features a USB-C port for potential updates or configuration.
Connection Guide
Before Installation
Remove and disconnect the factory stereo. Consult your vehicle's owner's manual or a professional for assistance.
Setting the Dipswitches
Consult the dipswitch selection guide to choose the correct configuration. Press a dipswitch down to the 'ON' position to activate it. Refer to the diagram for an example of the 'KENWOOD1' configuration.
Diagram showing dipswitch settings with switch 1 in the 'ON' position.
Installation Steps
- Connect the 16-pin head unit connection lead and the 18-pin steering wheel harness connectors to their respective ports on the interface.
- Connect the 16-pin head unit connection lead to the steering wheel remote input on the aftermarket stereo. Connection methods vary (3.5mm jack, SWC IR wire, KEY1/KEY2 wires). Refer to your stereo's manual if not clearly labeled.
- Connect the power/speaker ISO connector from the interface to the aftermarket stereo's ISO connection. If no ISO connector is present, use the "Wiring Key" for wire-to-wire connections. Some interfaces have extra "flying" wires for parking brake, reverse gear, and speed pulse.
- Connect the vehicle-specific connectors from the interface harness to the corresponding vehicle harness connectors.
- Connect any applicable flying wires to the rear of the stereo.
- Connect the antenna adapter to the vehicle's antenna connection at the rear of the aftermarket stereo.
- If installing an aftermarket reverse camera, connect the yellow RCA from the harness to the camera's yellow RCA (if supported).
- If installing a DAB antenna, connect the DAB aerial connector to the rear of the new stereo.
- After all connections are made, test the stereo and steering wheel controls thoroughly before reassembling the dashboard. If controls are unresponsive, check connections and dipswitch settings. Repeat connection steps if necessary.
Steering Wheel Control Configuration
The following button functions are typically assigned:
- A: Volume Up
- B: Volume Down
- C: Track Up
- D: Track Down
- E: Hang Up
- F: Pick Up (Short Press) / Voice (Long Press)
Note: Actual steering wheel control configurations may vary depending on the vehicle.
Button Remapping
Steering wheel buttons can be reconfigured or assigned dual functions (short press/long press). Availability depends on the vehicle and aftermarket radio support. Custom configurations can be made via PC, MAC, or smartphone through the USB port. Detailed instructions are available on the ACV website.
Connection Diagram
Head Unit Connection Lead:
- 3.5mm Jack Plug: Connects to the aftermarket stereo.
- 16-Pin Harness Connector: Connects to the interface.
SWC Interface Dipswitches: Refer to the Dipswitch Chart.
18-Pin Harness Connector: Connects to the interface.
Vehicle Connector: Connects to the vehicle harness.
ISO Connector: Connects to the radio harness.
Note: Harness wire colors are for illustration and may differ.
Important: Select either the 17-pin or 40-pin harness and discard the unused one.
Diagram illustrating the wiring connections between the interface, vehicle harness, and aftermarket stereo, including flying wires and ISO connectors.
Diagram showing the SWC interface dipswitches and the USB-C port.
