: Offers consistent data for both 1.3L (2NZ-FE) and 1.5L (1NZ-FE) variants.
After processing the sensor data, the ECU commands various actuators. The pinout will show pins for the fuel injectors (one per cylinder), the ignition coils , the Idle Speed Control (ISC) valve , and the VVT-i solenoid which controls the oil pressure to the camshaft phaser.
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Various ground points for the logic circuit and power transistors. Sensor Inputs (The "Senses")
Why is "186" critical? Unlike older ECUs with 60 or 80 pins, the 2NZ-FE uses a dense three-connector system. The "186" refers to the total number of terminal pins across all plugs. Typically, the layout is: : Offers consistent data for both 1
| Pin | Wire Color | Signal Description | Voltage/Logic | | :--- | :--- | :--- | :--- | | E6-1 | White/Red | Battery Backup (BATT) | 12V constant | | E6-4 | Black/White | Main EFI Relay Power (+B) | 12V switched | | E6-5 | Brown | Injector #1 | Ground pulse | | E6-6 | Light Green | Injector #2 | Ground pulse | | E6-7 | Yellow | Injector #3 | Ground pulse | | E6-8 | Blue | Injector #4 | Ground pulse | | E6-13 | Black | Power Ground (E1) | 0V chassis | | E6-14 | Black/Orange | Sensor Ground (E2) | 0V (clean) | | E6-16 | Red/Blue | Ignition Coil #1 (IGT1) | 5V square wave | | E6-17 | Red/White | Ignition Coil #2 (IGT2) | 5V square wave | | E6-23 | Green/Black | Crank Position Sensor (NE+) | AC sine wave | | E6-24 | Green/Red | Crank Position Sensor (NE-) | AC sine wave | | E6-28 | Purple | VVT-i Oil Control Valve (OCV+) | 12V PWM | | E6-30 | Black/Yellow | Engine Speed Output (TAC) | 12V pulse |
: Reads exactly 0 Volts at all times. A bad ground terminal can cause random sensor failure codes across the entire system. This public link is valid for 7 days
If you are reading this, you are likely deep into the wiring diagram of a Toyota Starlet, Vitz, Platz, or bB. You have encountered the legendary engine—Toyota’s 1.3-liter workhorse known for fuel efficiency and surprising tunability. But now, you face a wall of wires, a dead engine, or a standalone ECU upgrade. Your search query is specific: "2nz fe ecu pinout pdf 186 portable."
: The ECU has multiple power inputs and ground pins for stable operation. Key pins include the constant battery power (e.g., terminal BATT on E6 ), the main relay feed (e.g., +B on E5 ), and sensor grounds (e.g., E01 , E02 on E3 ). Common ground points are E01 , E02 , and E03 .
When troubleshooting an engine that will not start or has a misfire, verifying pins via back-probing with a digital multimeter is the primary diagnostic method. Below is a compiled reference table containing critical pin numbers, names, and expected target voltages based on documented factory repair standards: 2NZ-FE Engine Control Wiring Diagram | PDF - Scribd
To make the wiring matrix easy to scan and digest, the ECU pins are grouped into five primary functional categories. 1. Power Supply and Ground Circuit
