Isuzu 4hl1-1 Ecu Pinout !!install!! -
Isuzu 4HL1-1 engine is a 4.8L diesel powerhouse commonly found in N-Series (Elf) trucks.
A1
| Pin | Function | Notes | |------|----------------------------|------------------------------------------| | | Battery+ (Constant) | Unswitched power to ECU | | A2 | Battery+ (Constant) | Second feed | | A21 | Main Ground | Connect to engine block/battery negative | | A22 | Main Ground | Second ground path | | B3 | Ignition Switch ON (Key signal) | Switched 12V to wake ECU | | B4 | EGR Ground (Sensor return) | Not chassis ground; do not mix | isuzu 4hl1-1 ecu pinout