There are even differences between "Federal" and "California-spec" models due to varying emissions hardware. people.well.com Critical Pins for a "Bare Bones" Start
In late 1999, Toyota introduced VVTi (Variable Valve Timing with intelligence) to the 3RZ-FE. The ECU connectors changed to a square design (often grey or green plastic housings). These ECUs are more complex, requiring input from the VVTi cam gear solenoid and oil temperature sensors. 3rz-fe ecu pinout diagram
Whether you are building an off-road beast or simply reviving a 20-year-old Tacoma, keep this pinout guide laminated in your garage. It turns a rat’s nest of wires into a logical, manageable system. These ECUs are more complex, requiring input from
Leo probed it. Dead. Not even 0.5V. He traced the wire—corroded fusible link off the battery. One problem down. Leo probed it
| Pin | Wire Color | Function | Signal Type | | :--- | :--- | :--- | :--- | | E6-1 | Red | Cam Position Sensor (G2 signal) | AC Sine wave | | E6-2 | Blue | Crankshaft Position Sensor (NE signal) | AC Sine wave | | E6-3 | Green | Crankshaft Position Sensor (NE+) | AC Sine wave | | E6-4 | White | Cam Position Sensor (G2+) | AC Sine wave | | E6-5 | Green/White | Engine Coolant Temp (ECT) Sensor Signal | 0.2V-4.8V | | E6-6 | Red/Yellow | Manifold Absolute Pressure (MAP) Sensor | 0.5V-4.8V | | E6-7 | Red/Black | Throttle Position Sensor (TPS - VTA1) | 0.3V-4.7V | | E6-8 | Brown | Intake Air Temp (IAT / THA) | 0.5V-4.5V | | E6-9 | Blue | Knock Sensor (KNK) | AC Piezo signal | | E6-10| Gray | O2 Sensor Front (OX1) | 0.1V-0.9V | | E6-11| White/Blue | O2 Sensor Heater Ground (HT1) | Ground | | E6-12| Pink | Shielded Ground for Sensors | Chassis Ground | | E6-13| Not Used | - | - | | E6-14| Red/Blue | Sensor Power (VCC - 5V output) | 5V Reference | | E6-15| Not Used | - | - | | E6-16| Not Used | - | - | | E6-17| Black/Yellow | Starter Signal (Backup) | 12V | | E6-18| Black | ECU Ground (E2) | Sensor Ground | | E6-19| Not Used | - | - | | E6-20| Not Used | - | - | | E6-21| Not Used | - | - | | E6-22| Yellow/Blue | Throttle Position Sensor (VTA2 - idle switch) | On/Off (0V or 5V) |