Toyota 89661 Ecu Pinout Fixed Link

The is not just a picture of a plug. It is a road map to your engine’s brain. Whether you are reviving a dead Camry, swapping a 2JZ, or building a full race car, you cannot succeed without the correct wiring diagram.

If you are working on a 1UZ or 1JZ/2JZ engine, the pinout will be completely different. Always source the manual for that specific engine code. toyota 89661 ecu pinout

Toyota uses consistent acronyms across most of its vehicle range, even across different engines. Understanding these is key to mapping any ECU. Description BATT / B+ Battery Positive Constant 12V+ power from the battery. IGSW / IGN Ignition Switch 12V+ signal only when the key is on. E01, E02, E03 Engine Grounds Main grounds for fuel injectors and power circuits. E1 Signal Ground Clean ground for sensors. M-REL Main Relay ECU controls this to send power back to the ignition. +B / +B2 Power Supply Switched power from the main relay. FC / FPR Fuel Pump Relay Triggers the fuel pump relay to activate. NE+ / NE- Crank Sensor Crankshaft Position Sensor signal input. G+ / G- Cam Sensor Camshaft Position Sensor signal input. IGT Ignition Trigger Tells igniters/coils when to fire. IGF Ignition Feedback Confirms to ECU that spark occurred. W / WHL Check Engine Light Connects to the CEL (ground-switched). The is not just a picture of a plug