Here is the standard Toyota naming convention for a 1MZ-FE ECU:

The 1MZ-FE uses an external igniter (mounted near the airbox). ECU pins IGT1–6 go to the igniter, not directly to coils.

To understand the 1MZ-FE ECU pinout, you need to be familiar with the wiring diagram and the signal names. Here are some tips:

Toyota 1MZ-FE ECU pinout is a critical roadmap for the Engine Control Module (ECM) that governs the 3.0L V6 engine's operations. This engine, used widely in vehicles like the Camry, Avalon, and Lexus RX300 from 1993 through the mid-2000s, evolved through several versions, each requiring a specific pinout configuration for successful troubleshooting or engine swaps. 1. Evolution and Variants

Once upon a time in the world of high-performance tuning, the Toyota 1MZ-FE V6

If you're performing a 5S-FE (I4) to 1MZ-FE (V6) swap, you will need a conversion harness guide . The goal is to bridge the body plugs (the connectors that stay with the car) to the new engine ECU.