Steering wheel button control adapter for Land Rover ACV SWC 42XLR009-0

Steering wheel button control adapter for Land Rover ACV SWC 42XLR009-0

Retain the original steering wheel radio control functions when replacing the factory radio with an aftermarket unit. Depending on the vehicle equipment, the range of functions and the software of the newly installed radio, some functions may be limited or replaced by others. Compare the shown wiring connectors with the connectors in your vehicle and make sure they match both technically and visually. Check whether one of the listed OEM head units was originally installed. Before final mounting, verify the vehicle functionality, system settings and the correct operation of the steering wheel control (SWC).

Intended for vehicles

• Land Rover Discovery III [LA] (11/2004 -> 08/2009) - vehicles with CAN Bus, vehicle settings and date/time are not supported, OEM display is not supported and only the Land Rover startup logo is shown, fader function is not supported.
• Land Rover Range Rover Sport I [LS] (05/2005 -> 08/2009) - vehicles with CAN Bus, vehicle settings and date/time are not supported, OEM display is not supported and only the Land Rover startup logo is shown, fader function is not supported.

CAN Bus information

Connectors and power:

• Connector: 20‑pin Land Rover.
• Connection for OEM steering wheel control (SWC): 3.5 mm jack or spare wire.
• Connection for OEM amplified system: RCA (male) red/white – front pre‑out from the aftermarket HU; fader is not supported.

Settings:

• Set DIP switches according to the aftermarket head unit manufacturer (see the device manual).

Compatibility and limitations:

• Vehicles with CAN Bus.
• Vehicle settings and date/time are not supported.
• OEM display is not supported; only the Land Rover startup logo will be shown.

Signals and output load capacity:

• Red: +12 V ignition supply (terminal 15).
• Orange: +12 V illumination (terminal 58).
• Purple/white: +12 V reverse signal.
• Pink: speed pulse.
• Green: GND signal for parking brake.
• Max. output load: 250 mA. For higher current draw use a relay – 1 relay with coil resistance min. 75 Ω, 2 relays with coil resistances min. 150 Ω.

Important additional information

• Analog steering wheel control (SWC). Reimported vehicles or vehicles with different software may experience function incompatibilities.
• To fully activate the adapter, it is necessary to order the connecting cable for the specific head unit brand.

General installation instructions

Verification before installation:

1. Check all steering wheel control functions and vehicle settings with the original OEM head unit.
2. Disconnect the original radio (OEM HU) with power off.
3. Check all interface connections to ensure they are correctly connected – with power off.

Connection and wiring sequence:

1. Check the interface settings and hardware configuration – with power off.
2. Check the configuration of the connecting cable to the HU – with power off.
3. Connect the cable to the HU according to the aftermarket device manual.
4. Connect the other wires according to the device manual.
5. Connect the entire installation to the vehicle – connect the main power last.
6. Perform the software configuration of the interface according to the product description or manual.
7. Configure the aftermarket HU (steering wheel control, camera, handsfree, antenna power and others).
8. Perform a functional test of the steering wheel control and communication with the vehicle.

Changing the interface configuration and HU cable:

• Make all changes with power off.
• After making changes, repeat steps 5 to 8 listed above.

In case of interface or vehicle system malfunction:

• Reinstall the original OEM HU.
• Start the original unit.
• Initiate CAN Bus shutdown.
• Check the hardware configuration of the interface.
• After CAN Bus shutdown, repeat steps 5 and 6 listed above.

When modifying wiring or cable routing:

• Wiring and modifications must be performed only by professionally trained personnel.
• All changes must be verified for manufacturer approval or for effects on the vehicle warranty before connection.
• All modifications must be verified by measurement and compared with the vehicle wiring diagram before connection.
• You perform modifications at your own risk, without guarantee of functionality.
• Modifications are made at your own risk, without guarantee of preventing damage to the vehicle, device or interface.
• Pre‑modified wiring may result in loss of product warranty.

Product comments

Evaluation

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