You have two legitimate options to access the official Isuzu 4HL1 ECU pinout link.
Pins such as 46, 18, 53, 56, 59, 54, and 3 are frequently used for communication with the Vehicle Interface Module. isuzu 4hl1 ecu pinout link
Always use a digital voltmeter for testing circuits to avoid overloading internal ECM components. Isuzu 4hl1 Wiring Diagram - Pinterest You have two legitimate options to access the
The following images illustrate the 4HL1 control systems and ECU hardware typical for these engines: isuzu 4hl1 ecu pinout link
He needed the pinout.