Sumitomo HM (High temperature Multi-purpose) connectors are used throughout Japanese vehicle engine bays where temperatures up to 125C require reliable sealed connections for ECU, sensors, and ignition.
| Pin | Name | Function | Type |
|---|---|---|---|
| 1 | Pin 1 | Power or signal | PWR |
| 2 | Pin 2 | Signal | I/O |
| 3 | GND | Ground | GND |