Isuzu 4hl1-1 Ecu Pinout ^hot^

Before looking at pinouts, you must identify the physical ECU, as the 4HL1 was produced during a transition period.

| Pin / Terminal | Signal Description | Wire Color (Example) | | :--- | :--- | :--- | | E6-2 | Battery (for ECU memory) | L-BR | | E5-9 | IGSW (Ignition Switch) | B-O-BR | | E5-1 | +B (Power Source) | B-BR | | E5-8 | MREL (Main Relay) | W-G-BR | | E7-18 | VC (Sensor Power Source) | R-W-BR | | E5-22 | VPA1 (Accelerator Position Main) | W-L | | E5-28 | EPA1 (VPA1 Ground) | BR-W | | E5-23 | VPA2 (Accelerator Position Sub) | GR-G | | E5-29 | EPA2 (VPA2 Ground) | BR-Y | | E5-26 | VCP1 (Sensor Power for VPA1) | LG-R | | E5-27 | VCP2 (Sensor Power for VPA2) | BR-R | | E8-24 | VG (MAF Meter Signal) | W-R | | E8-32 | EVG (MAF Meter Ground) | B-W | | E7-31 | THA (IAT Sensor Signal) | Y-B | | E7-28 | E2 (Sensor Ground) | BR | | E7-20 | THIA (Diesel Turbo IAT Signal) | Y-G | | -- | DLC (Tech 2 communications) | -- | | -- | ECM (CAN communications) | -- | | -- | PTO accelerator sensor signal | -- | isuzu 4hl1-1 ecu pinout