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DIYPNP Nippon Denso 42 Pin Unassembled Kit

DIYPNP Nippon Denso 42 Pin Unassembled Kit

5.00 out of 5 based on 2 customer ratings
(2 customer reviews )


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SKU: DIYPNPN42-K Category: Brand:


Complete kit contains everything you need to assemble a DIYPNP ECU for cars with the 42 pin Nippon Denso connector. Includes MicroSquirt module and case. We’re running one of these on our own turbo 4AGTE powered MR2 test car, and it fits many other Toyota and Isuzu models as well.

Available Features / Technical Specifications, Based on MS2/E Firmware Version 3.0.3 or later

  • OEM ECU Connector to plug right into the factory harness!
  • Speed Density, Alpha-N and Hybrid Alpha-N (both SD and A-N algorithms hybridized) Supported
  • Onboard 2.5 bar MAP sensor
  • 2 Ignition Inputs (for dual wheel ignitions)
  • 4 Spark Outputs (Up to 4 Cylinder Coil On Plug, up to 8 Cylinder Wasted Spark)
  • Natively support two fuel outputs for batch or bank-to-bank fueling.  Optionally upgrade to 4cyl sequential or 6/8 cyl semi-sequential with this module.
  • Rotary Ignition Support
  • Enhanced Acceleration Enrichment (EAE)
  • Boost Control
  • Knock Control
  • Launch Control
  • Flat Shift
  • Tachometer Output
  • Fully Adjustable Rev Limiter
  • Table Switching
  • 4 General Purpose Outputs
  • 4 General Purpose Inputs  (2 analog, 2 digital)
  • Support for Flex Fuel
  • Optional Realtime Baro Correction
  • Closed Loop O2 Correction
  • Plenty of Proto Area, add your own customizations!
  • There’s more than we could list here– click this link to view the full feature list of MS2/E.
  • Also- you can click this link for the official DIYPNP Product Page Feature List which includes the above list plus a hardware level feature list (that tells you not just what you can do, but what hardware is available to do it)

Note:  Some of the features listed above use the General Purpose Inputs/Outputs.

Application List

A partial list of what cars this connector fits is shown below.  For more details including a list of vehicles we have detailed documentation and startup maps for, click here.

Make Model Engines From To Notes
Isuzu Amigo 4ZE1 (2.6 inline 4) 1988 1992
Isuzu Pickup 4ZE1 (2.6 inline 4) 1988 1992
Isuzu Rodeo 4ZE1 (2.6 inline 4) 1991 1992
Isuzu Trooper II 4ZE1 (2.6 inline 4) 1988 1991
Toyota 4Runner 22R-E, 22R-TE 1984 1991
Toyota Celica All except 3S-GE and 3S-GTE 1985 1990
Toyota Corolla 4AGE naturally aspirated 1985 1989 AE82 FX16, AE86, AE92
Toyota MR2 4AGE naturally aspirated 1985 1989
Toyota MR2 5SFE manual transmission 1991 1992
Toyota Pickup 22R-E, 22R-TE 1984 1991

Toyota ECUs that use this connector are generally marked “10T-18T-14T” on the lower edge of the ECU identification sticker.

This board supports up to four BIP373 ignition drivers which are not included in order to keep your cost down since most of you won’t need them for running your stock setup. If your application does require internal ignition drivers (again, most do not) you can add BIP373 ignition drivers to your kit.  We offer a DIYPNP BIP373 mod-kit which includes the BIP373, Heatsink, and mounting hardware here.

Customers' review

Rated 5.00 out of 5 stars
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2 reviews for DIYPNP Nippon Denso 42 Pin Unassembled Kit

  1. 5 out of 5

    Perfect for my 1986 Toyota MR2 with a 4AGTE! really easy to assemble and didn't have any problems at all.

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  2. 5 out of 5

    works great! using it on my 1986 Toyota MR2 with a 4AGTE.

    Was this review helpful to you? 0 of 0 people found this review helpful

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How is the DIYPNP different from an MSPNP, besides being a solder it yourself kit?

  • The DIYPNP and MSPN Gen 2 are closely related. Both use the MicroSquirt Module at their core and run MS2/Extra firmware. The MSPNP adds a couple extras – an improved knock circuit, peak and hold injector drivers, and a 4 bar MAP sensor with a 1 bar barometric correction sensor. Other than that, they are very similar.

Can I use an MSPNP map in a DIYPNP?

  • Yes, but you will get a couple warnings when it loads as some of the output pins have different names (and the outputs may also be on different pins depending on how you built the DIYPNP). You will need to confirm that the outputs are on the right pins before you attempt to start the engine.

Can I use a Stimulator or JimStim with a DIYPNP?

  • This is fairly difficult – you will need to make an adapter harness with the same pinout you have built for the DIYPNP. You can, however, power the DIYPNP directly from a 12V power supply for loading firmware and other bench tests.

Can this fit in the stock ECU location?

  • The DIYPNP is taller than a stock ECU. We have confirmed it won’t mount to the factory kick panel bracket in Fox body Mustangs. Fitment in other applications is uncomfirmed.

Can I buy a fully assembled DIYPNP?

  • DIYPNPs are only sold in kit form, but we may have a ready to run plug and play option for your vehicle in the MSPNP line. Please see our line of pro and PNP options to determine if we have one for your car.

Questions & Answers

  1. 0 votes

    Toyota changed the ECU at this point, probably to keep up with rising emissions requirements. The updated ECU used different connectors. We have DIYPNPs that fit many of these, but the connector changed depending on both the transmission type and whether the truck was two or four wheel drive.