STEERING WHEEL CONTROL INTERFACE
FOR CITROEN / FIAT VEHICLES
Model: 42xfa004-0
Introduction
The 42xfa004-0 interface allows for the retention of the steering wheel controls as well as other vital features when installing an aftermarket unit into the vehicle. This interface features selectable dipswitches for dedicated applications, ensuring seamless integration by referring to the provided configuration tables.
Vehicle Application
This interface is compatible with the following vehicles:
| Manufacturer | Model (Chassis Code) | Years |
|---|---|---|
| CITROEN | Jumper (250) | 2011-2014 |
| CITROEN | Nemo (A.) | 2008-2015 |
| CITROEN | Relay (250) | 2011-2014 |
| FIAT | 500 (ZAF 312) | 2007-2015 |
| FIAT | Doblo (ZAF 263) | 2010-2015 |
| FIAT | Ducato (ZAF 250) | 2011-2014 |
| FIAT | Fiorino (ZAF 225) | 2008-2016 |
| FIAT | Grande Punto (ZAF 199) | 2005-2010 |
| FIAT | Idea (ZAF 350) | 2005-2008 |
| FIAT | Punto (ZAF 199) | 2010-2012 |
| FIAT | Punto Evo (ZAF 199) | 2009-2011 |
| FIAT | Qubo (ZAF 225) | 2008-2016 |
| OPEL | Combo D (Combo D) | 2012-2018 |
| PEUGEOT | Bipper (A) | 2007-2015 |
| PEUGEOT | Boxer (Y) | 2011-2014 |
Note: For vehicles with CAN Bus ISO power connector and Blaupunkt / Delphi / VDO OEM Head Unit.
Key Features
- Retain steering wheel control functionality
- Replace factory radio
- Outputs for speed pulse, park brake, and reverse
- Software updateable
- Remappable buttons
Prior to Installation
Installation requires a certain level of technical knowledge. Prior to installation, it is important to read this guide. 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 ACV 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
This section details the wire functions for the ISO connector and flying wires.
ISO Connector Wiring Key
| Color | Function |
|---|---|
| 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
| Color | Function |
|---|---|
| Pink | Speed Pulse - 0 to 12V Square Wave @ 1Hz/Kph |
| Green | Park Brake |
| Purple/White | Reverse Gear - 250mA |
Power and Ignition Wiring Key
| Color | Function |
|---|---|
| Yellow | Permanent 12V |
| Black | Ground |
| Red | Ignition 12V |
| Orange | Illumination |
Outputs & Ratings
| Parameter | Value |
|---|---|
| Standby Current | <3mA |
| Operating Voltage | 6V to 16V |
| Operating Temperature | -20°C to 85°C (rated at 25 degrees Centigrade) |
Dipswitch Configuration
The interface features dipswitches for configuring compatibility with various head unit manufacturers. Consult the table below for the correct settings. To activate a dipswitch, press it downward into the 'ON' position. ⚙️
| MANUFACTURER | SYSTEM | 1 | 2 | 3 | 4 | CONNECTION |
|---|---|---|---|---|---|---|
| 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 |
Note: Dipswitches 5 & 6 are reserved for vehicle-specific configuration.
SWC Interface Modes
The interface supports several modes for steering wheel control communication:
KEY1 and KEY2 Mode
KEY1 and KEY2 are specifically tailored for analog learning mode-style radios. The SWC module is designed with a resistor chain that precisely matches the required resistance for seamless compatibility with this type of head unit.
KEY1 and KEY2 EXTEND Mode
This mode extends every button press to 2 seconds during the learning process. This feature addresses scenarios where holding for 2 seconds isn't feasible with certain steering wheel buttons, simplifying head unit programming. Extend mode is primarily used during the teaching process.
ANALOG SINGLE WIRE and ANALOG SINGLE WIRE EXTEND
This function operates similarly to KEY1 and KEY2 but transmits all unique values through a single IR SWC wire. This is crucial for compatibility with learning-style head units featuring only one learning input wire. The Analog Extend mode functions identically to its counterpart within the KEY1 and KEY2 system but transmits through a single wire.
Installation 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 (see table above) to select the appropriate configuration. To activate a dipswitch, press it downward into the 'ON' position. ⚙️
A diagram shows dipswitch positions 1 through 6, with an example configuration for KENWOOD1 where switches 1, 3, and 4 are ON, and 2, 5, 6 are OFF.
Installation Steps
- Take the interface, then connect the 16-PIN head unit connection lead and the 18-PIN steering wheel harness connectors to their respective ports.
- 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 SWC IR wire or wired inputs KEY1 and KEY2. For specific connection guidance, refer to your aftermarket stereo's installation manual if not clearly labelled on the stereo harness.
- 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.
- Connect the vehicle-specific connectors from the interface harness to the corresponding connectors on the vehicle harness.
- Connect the flying wires on the harness to the rear of the stereo (if applicable).
- Connect the antenna adapter to the vehicle's existing connection at the rear of the aftermarket stereo.
- 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).
- When installing a DAB antenna, ensure to connect the DAB aerial connector to the rear of the new stereo.
- 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. ✔️
Steering Wheel Control Configuration
The steering wheel buttons can be re-configured or assigned dual functions. The availability of these buttons depends on the specific vehicle and the aftermarket radio's support.
Diagram shows a steering wheel with buttons labeled A through H:
- A: Volume Up
- B: Volume Down
- C: Track Up
- D: Track Down
- E: Mute
- F: Voice
- G: Pick Up (Call)
- H: Hang Up (Call)
The provided diagram serves as an example; actual steering wheel control configurations may vary depending on the vehicle.
Button Remapping
In addition to basic button assignment, the interface offers the option to assign dual functions to each button on the steering wheel. This means every button can be programmed to execute both a short press command and a long press command. Users can also create their own bespoke configurations.
Button configuration can be performed via PC, MAC, or smartphone using the USB port. Detailed Button Remapping instructions can be found in a separate guide on the ACV website.
Connection Diagram
The connection diagram visually illustrates the interface's components and their connections.
Head Unit Connection Lead: Features a 3.5mm jack plug for connecting to the aftermarket stereo's SWC IR input. Wires include GROUND, KEY 2, KEY 1, and SWC IR. A 16-PIN HARNESS CONNECTOR connects to the interface.
SWC Interface: Shows the main interface unit with dipswitches labeled 1 through 6 (N, O, K, E positions indicated). A square connector is also visible.
SWC Vehicle Harness: Includes an ISO CONNECTOR for connecting to the vehicle's radio harness. It also features an 18-PIN HARNESS CONNECTOR that connects to the interface. Specific wires are labeled for SPEED PULSE, REVERSE, PARK BRAKE, and AMP REMOTE, connecting to the vehicle harness.
Note: Harness wire colors are for illustration purposes only and may differ from the actual harness.
