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Toyota 89661 Ecu Pinout -

Toyota 89661 ECU pinout — overview & key pin functions

Below is a concise, general overview for the Toyota 89661 ECU connector family (commonly used in many Toyota models for engine/ECM and immobilizer-related connections). Connector pinouts can vary by model year, engine type, and region—use this only as a starting reference and verify against the vehicle’s factory service manual or wiring diagrams for the specific VIN.

or 22R-E), the pin functions are often printed directly on the circuit board (PCB) next to the connector pins. Opening the case with a few screws can provide the most accurate diagram for your specific unit. Engine-Specific Enthusiast Forums: 1UZ-FE (Lexus/Celsior) toyota 89661 ecu pinout

| Connector | Typical Color | Common Circuits | |-----------|---------------|------------------| | A (22-pin) | Gray or White | Injectors, ignition coils, power, grounds | | B (22-pin) | Gray | Sensors (TPS, MAP/MAF, ECT, IAT, CKP, CMP) | | C (16-22 pin) | Black or Blue | Solenoids (VVT, EGR, purge), fuel pump relay, CEL | | D (if present) | Black | Immobilizer, diagnostics (K-Line, CAN low/high) | Toyota 89661 ECU pinout — overview & key

This article is a deep dive into the 89661 family of ECUs. We will cover what these numbers mean, why the pinout changes between models, how to identify your specific version, and provide a detailed breakdown of the most common connector configurations. OEM factory service manual wiring diagrams for the

Connector A (Engine Sensors – 26 pins)

| Pin | Typical Signal | Notes | |-----|----------------|-------| | A1 | IGT1 (Ignition timing signal 1) | To igniter | | A2 | IGT2 | | | A3 | IGT3 (if V6) | | | A4 | IGT4 (if V6) | | | A5 | IGF (Ignition confirmation) | From igniter | | A6 | NE+ (Crankshaft position sensor +) | Variable reluctance | | A7 | NE- (Crankshaft position sensor -) | | | A8 | G2+ (Camshaft position sensor) | | | A9 | G2- | | | A10 | THW (Engine coolant temp) | Analog input | | A11 | THA (Intake air temp) | Analog input | | A12 | VTA1 (Throttle position sensor) | Analog 0-5V | | A13 | VTA2 (TPS sub) | Redundant signal | | A14 | E2 (Sensor ground) | Common ground | | A15 | VC (Vref – 5V output) | To TPS, MAP, etc. | | A16 | KNK1 (Knock sensor 1) | | | A17 | KNK2 (Knock sensor 2) | V6 only | | A18 | OX1 (Front O2 sensor) | 0-1V or wideband | | A19 | OX2 (Rear O2 sensor) | | | A20 | STA (Starter signal input) | From ignition switch | | A21 | NSW (Neutral start switch) | Park/Neutral position | | A22 | SPD (Vehicle speed signal) | From speed sensor or ABS | | A23 | AC1 (A/C request) | | | A24 | ACMG (A/C magnetic clutch relay) | Output | | A25 | ELS (Electrical load signal) | Alternator load | | A26 | BATT (Battery backup) | Constant +12V for memory |

If you reply with your full 89661-XXXXX number, I can narrow it down to a specific family (e.g., V6 Camry, 4-cylinder Corolla, Tundra V8) and give you typical pin functions for that generation.