Toyota 89661 Ecu Pinout [2025]
The Toyota part number prefix refers to the Engine Control Module (ECM), commonly known as the ECU. This component is the central computer responsible for managing the engine's internal combustion processes.
| Pin No. | Symbol | Description | Function | | :--- | :--- | :--- | :--- | | | Injectors | Fuel Injector Drivers | Ground Pulse to Injectors | | IGT | Ignition | Ignitor Trigger Signal | Fires Ignition Coil | | IGF | Ignition | Ignitor Confirmation | Confirms Spark Occurred | | ISCC / ISCO | IACV | Idle Air Control Valve | Idle Speed Control | | SPD | Vehicle Speed | Speedometer Signal | Shift Logic/Speed Cut | | ACMG | A/C Clutch | Air Conditioner Mag Switch | A/C Load Compensation | | STA | Start Signal | Key Start Position | Cranking Enrichment |
Excellent for cross-referencing part numbers to see which car your ECU originally came from. AI responses may include mistakes. Learn more 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) |
: Ignition Trigger signal sent from the ECU to the igniter/coil to fire the spark plug. The Toyota part number prefix refers to the
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.
Output signal to the EFI relay to provide main power. | Symbol | Description | Function | |
This designates the exact vehicle model, engine generation (e.g., 1JZ-GTE, 4A-GE, 3S-GTE), transmission type (Manual vs. Automatic), and regional emissions market (JDM, USDM, EDM).
Constant 12V from the battery (maintains ECU memory/codes).
: Switched 12V power inputs from the EFI Main Relay.