Isuzu 4hl1 Ecu Pinout Here

: Frequently designated for the Fuel Rail Pressure (FRP) sensor signal.

Ultimate Isuzu 4HL1 ECU Pinout Guide: Wiring Diagram & Troubleshooting isuzu 4hl1 ecu pinout

Two rows: Top row (nearer to engine block), Bottom row B1–B32 (nearer to cabin). Pin 1 is indicated by a red or white stripe on the connector body or a raised "1" marking. : Frequently designated for the Fuel Rail Pressure