Adapter Boards

Some boards have extra components on the adapter board that you may want to assemble as well. See these links & instructions below for adapter boards with special components.


Nippondenso 52 pin: Adapter Board Assembly – Stepper Driver

The N52 and D56 adapter boards both have extra circuitry for the stepper valves found on many Toyota, Mitsubishi, and GM engines.

Stepper Control

Stepper control with a MicroSquirt module is supported in the latest V3.0.3 MS2/Extra builds. You cannot run a stepper and sequential injection at the same time.

  1. Install resistors R1A through R4A at the edge of the board.
  2. Install the stepper driver IC, U1A, with the notched end pointing to the left edge of the board.
  3. Install capacitors C1A through C3A.

The stepper IAC circuit has ten jumpers on a header on the far left of the adapter board. Here is how to connect these jumpers.

  1. PT6 and PT7 connect to the PT6 and PT7 terminals on the main board.
  2. PIB connects to the PIB4 terminal on the main board.
  3. The 5 volt connection connects to the 5 volt output pin on the main board.
  4. You can connect the 12 volt pin to either a 12 volt terminal on the main board or a 12 volt source from the ECU connector.
  5. The GND pin must be grounded to a power (not sensor) ground for the IAC to work.
  6. Pins 1A and 1B connect to opposite ends of one coil on the IAC valve, and pins 2A and 2B connect to the other coil. If we have an application specific write up available for your vehicle, we will provide specific wiring details for this if possible.

DIYPNP Delphi 56 Pin: Adapter Board Assembly – Stepper Driver

The Delphi 56 Pin Adapter Board has some extra circuitry for the stepper valves found on virtually all its applications.

Stepper Control

Stepper control with a MicroSquirt module is supported in the latest V3.0.3 MS2/Extra builds. You cannot run a stepper and sequential injection at the same time.

  1. Install resistors R1A through R4A at the edge of the board.
  2. Install the stepper driver IC, U1A, with the notched end pointing to the left edge of the board.
  3. Install capacitors C1A through C3A.

The stepper IAC circuit has ten jumpers on a header on the far left of the adapter board. Here is how to connect these jumpers.

  1. IN1 and IN2 connect to the PT6 and PT7 terminals on the main board, respectively.
  2. ENABLE connects to the PIB4 terminal on the main board.
  3. The 5 volt connection connects to the 5 volt output pin on the main board.
  4. You can connect the 12 volt pin to either a 12 volt terminal on the main board or a 12 volt source from the ECU connector.
  5. The GND pin must be grounded to a power (not sensor) ground for the IAC to work.
  6. Pins 1A and 1B connect to opposite ends of one coil on the IAC valve, and pins 2A and 2B connect to the other coil. We will provide details on specific IAC applications in our model specific documents.

DIYPNP Ford 60 Pin: Adapter Board Assembly – TFI Ignition Control

We’ve put a little step-up circuit on the F60 adapter board for TFI ignition control. This takes the 5 volt IGN signal, inverts it, and steps it up to 12 volts for TFI distributors. Do NOT install this circuit on EDIS-equipped cars.

TFI Ignition Control

  1. Install the R1A and R2A resistors on the adapter board.
  2. Install Q1A, with the curved side facing the curve on the silk screen.
  3. Jumper IG1 on the main board to IGN on the adapter board. The rest of the connections are routed inside the PCB.

That’s it!


DIYPNP Bosch 55 Pin: Adapter Board Assembly – Extra Spark Control

The V1.5 Bosch 55 Pin Adapter Board has space for two extra coil drivers for those who want to drive six coils. You’ll need a BIP373 and heat sink as in our DIYPNP BIP373 mod kit. You’ll install the BIP373s in the Q1A and Q2A slots, and 100 ohm resistors in R1A and R2A. Then wire the In connections to the signals from the DIYPNP main board (IG2 for Spark B, WLD for Spark C) to the In terminals, and the Out terminals to the negative terminals on the coils.

Note that these coil drivers are not part of a standard build. They are optional circuits you can add if you wish to use BMW (or Ford) coils in a coil on plug configuration.