Microsquirt Pinout, Connector & Wiring Guide
Detailed connector configurations, pin mappings, and electrical schematic specifications for the Microsquirt. This guide helps you integrate the Microsquirt control unit into your wiring loom design using Wiringly.
You can add the Microsquirt directly onto your harness drawing using our interactive digital builder. Wiringly automatically populates all pinout mappings, connector bodies, and suggested colors. Start Harness Design with Wiringly
Component Overview & Specs
The Microsquirt is a professional-grade control unit manufactured by Megasquirt (P/N: Microsquirt). It is specifically engineered to handle high-performance conditions in automotive and motorsport environments.
| Technical Specification | Value / Details |
|---|---|
| Component Name | Microsquirt |
| Manufacturer | Megasquirt |
| Part Number | Microsquirt |
| Category | Control unit |
| Dimensions | 95mm (W) x 70mm (H) x N/Amm (D) |
Connector Configurations & Pin Assignment Maps
The electrical connections for the Microsquirt are organized by physical connectors. Wiringly tracks all compatible mating connectors, terminal pins, wire seals, and wire specifications.
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 Design & Schematic Software
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 control unit pin assignments, and connect them to your power distribution units or engine control units.
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.
- To browse other catalog entries, visit our Component Pinout Guide.
- If you are new to the platform, we recommend starting with our Quick Start Guide.
- For wiring advice, check out the Wire Management Guide.