Be careful when mixing looms. For example, some EF-series engines changed Pin 10 from an earth (ground) to a 12V+ line between generations; mixing them can immediately blow the 15-amp engine fuse.

Comprehensive Guide to Daihatsu Hijet EF-SE ECU Pinouts The with the EF-SE engine (a 0.6L non-turbo SOHC 3-cylinder) is a staple of the Japanese mini-truck (Kei truck) world. Understanding its ECU pinout is critical for troubleshooting sensor issues, performing engine swaps, or wiring aftermarket accessories like tachometers or air conditioning relays. Understanding the EF-SE ECU Configuration

Many Daihatsu Denso ECUs have the pin functions (e.g., "PIM", "OX") printed directly on the PCB (Printed Circuit Board) next to the connector pins.