Focal IW TOY YISO Harness | Toyota Amplifier Integration
One-metre ISO harness for selected Toyota, Lexus, Subaru and related factory head units and the Focal Impulse 4.320.
Connect the Focal Impulse 4.320 to a Compatible Toyota Factory Head Unit
The Focal IW TOY Y-ISO Harness routes compatible speaker-level signals from selected Toyota-family factory head units through the Focal Impulse 4.320 while retaining the original radio and integrated vehicle functions.
Toyota Factory Audio Compatibility
Not compatible with factory amplified or premium Toyota audio systems. Designed for compatible non-amplified factory audio systems only. Please refer to the Compatibility Guide or contact your nearest Authorised Focal Australia Dealer to confirm compatibility.
The standard Y-ISO and Impulse installation is for compatible non-amplified systems only. Premium Toyota and Lexus systems with JBL, Mark Levinson or another factory amplifier require a different solution.
Designed for the Focal Impulse 4.320 Amplifier
The harness provides the vehicle-side connection for the Impulse 4.320. Extension and output harnesses, fused power wiring, ground and compatible speakers are also required.
One-Metre Toyota ISO Harness Cable
The original IW TOY Y-ISO Harness is supplied as a one-metre ISO cable.
ISO Connections Without Soldering
Vehicle-specific and ISO connectors support integration without individually soldering compatible factory speaker wiring.
Select the Harness by the Actual Factory Connector
The original harness is listed for selected Toyota, Lexus, Subaru, Citroen and Peugeot applications. Production changes can introduce V2 or another connection within the same model family.
Original and V2 Toyota Harnesses Are Not Interchangeable
The original and V2 harnesses support different head-unit connections. Some applications require physical checking because either connector may be present.
Retain the Original Factory Head Unit
A compatible original head unit remains installed, preserving steering-wheel controls, cameras, navigation, parking displays and vehicle settings. Aftermarket radios normally require conventional wiring.
Additional Focal Inside Components Required
Focal Impulse 4.320 amplifier
Compatible Focal Inside extension cable
Correct IW IMP amplifier harness
Fused power cable and ground cable
Compatible Focal speakers and optional subwoofer
The Harness Does Not Power the Amplifier
The Y-ISO Harness does not provide the amplifier power supply. A correctly sized, fused power connection and secure ground are required.
Factory Equalisation and Processing May Remain
Factory equalisation and bass limiting remain after the harness and amplifier are installed. Advanced correction may require a DSP.
Professional Installation Recommended
Professional installation is recommended to verify the connector, non-amplified system, original-versus-V2 requirement, power wiring and amplifier settings.
Confirm Compatibility Before Purchasing
Not compatible with factory amplified or premium Toyota audio systems. Designed for compatible non-amplified factory audio systems only. Please refer to the Compatibility Guide or contact your nearest Authorised Focal Australia Dealer to confirm compatibility.
