Haltech HT-186337 Quick Start Manual page 2

ADAPTER HARNESS OVERVIEW
Nexus ECU with Plug 'N' Play
adapter harness
Example factory ECU
Congratulations on your purchase of a Nexus Plug
'N' Play adapter harness for your vehicle. This
vehicle-specific adapter harness enables you to
seamlessly integrate a Nexus S3 or S2 ECU into
your vehicle without the complexities of wiring an
ECU. With this hassle-free solution, you can dive
straight into tuning.
Nexus ECUs stand at the forefront of engine
management systems, featuring cutting-edge
technology and innovative features. Designed for
What's in the box?
• HT-186337 - Mazda MX5 NB SE Nexus Plug 'N' Play adapter box
• HT-130400 - Nexus S3/S2 Plug 'N' Play adapter harness
• HT-010200 - Intake air temperature sensor (M14 x 1.5 thread)
• Quick Start Guide
Example factory ECU
harness connectors
the next generation of automotive enthusiasts and
professionals, this state-of-the-art ECU seamlessly
combines powerful engine control with a range of
additional functionalities, making it a versatile and
comprehensive solution for everyday driving to
high-performance racing.
With full compatibility with a myriad of Haltech
devices, it streamlines the configuration of engine
parameters and additional functionalities, all
programmable using a single piece of software.
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Application Notes
• This Mazda MX-5 NB SE Nexus Plug 'N' Play
adapter harness is designed to be optimally used
with a Nexus S3 ECU. Using a Nexus S2 instead
of an S3 is possible, but note that this will reduce
some of the car's factory functionality. These
functions are labeled "S3 only" and can be checked
in the pinout reference tables found in the last few
pages of this quick start guide.
• Ensure that the correct basemap is uploaded into
the ECU before powering the unit through the Plug
'N' Play adapter harness.
• Please note that the basemap serves as a
starting point only, and the ECU will require
appropriate tuning. Haltech will not be held
responsible for engine damage due to the improper
use of basemaps.
• Immobilizer light notes - This product does not
support the factory immobilizer. The ECU will not
immobilize the engine, even if the immobilizer light
is flashing in the instrument cluster.
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