Ecu Pinout - Toyota 89661
Engine speed (RPM) crankshaft position sensor signals.
Confirm if the donor vehicle was automatic or manual. An automatic ECU contains extra pins for shift solenoids (e.g., S1, S2, SLN) and transmission speed sensors (SP2+, SP2-). Using an automatic ECU in a manual swap requires specific pins to be jumped (such as the Neutral Start Switch / NSW pin) to allow the engine to start and rev past safety limits. Step 3: Match Connector Orientations
89661 ECUs manufactured between 1988 and 1998 commonly suffer from leaking internal electrolytic capacitors (particularly those made by Nichicon). The corrosive fluid leaks onto the PCB traces, eating away at the copper pathways connecting pins like +B , IGF , or injector drivers.
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1JZ/2JZ, 1UZ/3UZ, 2TR-FE, 1ZZ/2ZZ, 3S-GE, 1KZ, and many more.
| Connector | Pin | Function | Wire Color | Signal | | :--- | :--- | :--- | :--- | :--- | | A | 1 | IGT1 (Coil 1) | Black | 5V Square Wave | | B | 1 | BATT (Memory) | White-Red | 12V Constant | | B | 10 | NE+ (Crank) | Black | AC Sine Wave | | C | 6 | FC (Fuel Pump) | Blue-Black | Switched Ground | | D | 14 | TC (Check Engine) | Violet-Yellow | 0V, 12V (Oscillating) |
4A-GE, 3S-GTE, 1UZ-FE (Early), 2JZ-GTE (Non-VVTi). Engine speed (RPM) crankshaft position sensor signals
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Vehicle manufacturing dates dictate whether your ECU utilizes early non-VVTi wiring or later multiplex/Can-bus systems. Universal Toyota ECU Pin Acronyms
Turn the ignition key to 'ON'. Measure the voltage at the VC pin relative to sensor ground (E2). It must read exactly 4.95V to 5.05V. Using an automatic ECU in a manual swap
Multi-row, high-density configurations (often 4 or 5 blocks grouped together).
The most frequently requested pinout for the "89661" prefix belongs to the equipped with the 2.4L 22R-E engine . This unit typically utilizes three rows of pins arranged in a "D" shape or straight configuration depending on the year.
+5V constant power output supplied to sensors (TPS, MAP). Ignition & Fuel Systems
