Microsquirt Pinout & Wiring Diagram Guide
Technical pinouts, connector assignments, and suggested wiring layouts for the Microsquirt.
To design a professional, custom harness utilizing the Microsquirt, launch the interactive Wiringly canvas. 👉 Start Harness Design with Wiringly
Component Specifications​
The Microsquirt is a premium control unit designed for high-performance motorsport and automotive applications.
| Specification | Details |
|---|---|
| Component Name | Microsquirt |
| Manufacturer | Megasquirt |
| Part Number | Microsquirt |
| Category | Control unit |
| Dimensions | 95mm (W) x 70mm (H) x N/A (D) |
Connectors & Pin Assignments​
Below is the structured electrical wiring pinout map for the Microsquirt. Wiringly automatically tracks suggested wire specifications and color collections from this master component.
776164-1 (776164-1)​
Connector Specifications​
| Property | Details |
|---|---|
| Connector Part Number | 776164-1 |
| Compatible Terminals | 770520-1 |
| Pin | Function/Description | Suggested Wire Color |
|---|---|---|
| 1 | 12V | Red |
| 2 | CAN H | Blue with Yellow Stripe |
| 3 | CAN L | Blue with Red Stripe |
| 4 | VR 2+ | White |
| 5 | SpareADC2 | Pink with Black Stripe |
| 6 | FLEX / Spare in | Violet with White Stripe |
| 7 | FIDLE | Green |
| 8 | Fuel Pump Out | Violet |
| 9 | INJ 1 | Green |
| 10 | INJ 2 | Blue |
| 11 | Spark B | White with Red Stripe |
| 12 | Spark A | White |
| 13 | RX | Orange |
| 14 | TX | Blue |
| 15 | Bootloader | Violet with Black Stripe |
| 16 | ALED | Yellow with Black Stripe |
| 17 | WLED | Yellow with White Stripe |
| 18 | Sensor GND | White with Black Stripe |
| 19 | Serial GND | Black |
| 20 | Sensor GND | White with Black Stripe |
| 21 | VR 2- | Yellow |
| 22 | Power GND | Black |
| 23 | Power GND | Black |
| 24 | MAP | Green with Red Stripe |
| 25 | CLT | Yellow |
| 26 | MAT | Orange |
| 27 | TPS | Blue |
| 28 | TPS Vref 5V | Grey |
| 29 | SPAREADC | Orange with Green Stripe |
| 30 | OPTO + | Grey with Red Stripe |
| 31 | OPTO - | Grey with Black Stripe |
| 32 | VR1+ | White |
| 33 | VR1- | Yellow |
| 34 | O2 (Lambda) | Pink |
| 35 | Tacho out | Green |
Harness Integration in Wiringly​
Wiringly simplifies the process of creating complete, error-free wiring schematics. Using our interactive digital canvas, you can drop the Microsquirt directly into your project, automatically load these pin assignments, and connect them to your power distribution units or engine control units. If you are new to the platform, we recommend starting with our Quick Start Guide.
The platform tracks your wire colors, gauges, and terminal types automatically, compiling a complete bill of materials (BOM) and cutting list for your physical build.