Also check (RM-0006 for 2NZ-FE electrical).
The 2NZ-FE engine utilizes an Electronic Control Unit (ECU) designed to monitor environmental sensors and control electronic actuators in real time. Early generations of this engine—such as those featured in the 1999–2004 Toyota Echo—primarily rely on a labeled sequentially as Connectors A, B, C, and D . 2nz Fe Ecu Pinout Pdf 186
| Pin Range | Function | |-----------|----------| | 1–10 | Power, grounds, main relay control | | 11–20 | Sensors (MAP, TPS, ECT, IAT, O2, VVT) | | 21–30 | Injectors, ignition coils (IGT/IGF) | | 31–40 | Idle air control (IACV), fuel pump relay | | 41–50 | MIL, diagnostic (TC, SIL), alternator | | 51–60 | AC, speed sensor, starter signal | | 61–64 | +B backup, +B main | Also check (RM-0006 for 2NZ-FE electrical)