Toyota 89661 Ecu Pinout -
Before using a diagram, look at the sticker on your ECU again. You need the full number (e.g., 89661-06020). Without the last 5 digits, a pinout is a guessing game.
| Pin | Function | |-----|-----------| | A10 | Camshaft Position Sensor | | B12 | Ignition Coil 1 | | C9 | Alternator L terminal |
❗ These are not interchangeable – using the wrong pinout can destroy the ECU or wiring. toyota 89661 ecu pinout
If you are probing the ECU:
Because Google cannot store pinouts for 200+ Toyota variants in one article, you need to know how to hunt for your specific diagram. Here are the three best methods. Before using a diagram, look at the sticker
| Pin No. | Symbol | Description | Wire Color (Typical) | | :--- | :--- | :--- | :--- | | E1 | Ground | ECU Case/Signal Ground | Brown/White | | E2 | Ground | Sensor Ground | Brown | | E01 | Power Ground | Injector/Actuator Ground | Brown | | E02 | Power Ground | Injector/Actuator Ground | Brown | | BATT | Battery Power | Constant 12V (Keep Alive Memory) | Black/Red | | +B | Main Relay | Switched 12V Power (Main) | Black/Orange | | +B1 | Main Relay | Switched 12V Power (Backup) | Black/Orange |
| Pin | Signal | Notes | |-----|----------------|-------| | C1 | CANH (CAN High) | OBD-II diagnostics | | C2 | CANL (CAN Low) | | | C3 | SIL (Serial data link) | Toyota proprietary | | C4 | TXCT (Transmit to diagnostic tool) | | | C5 | RXCT (Receive from diagnostic tool) | | | C6 | W (Warning light – MIL) | | | C7 | TACH (Tachometer output) | To cluster or diagnostic connector | | C8 | VSS (Vehicle speed output) | 4-pulse per revolution | | C9 | PSCT (Power steering signal) | Idle-up input | | C10 | STP (Stop lamp switch) | Brake pedal input | | C11 | IMI (Immobilizer signal) | From transponder key amplifier | | C12 | CODE (Immobilizer code line) | | | C13 | K-LINE (ISO 9141-2) | Older diagnostic | | C14 | L-LINE | | | C15 | IG+ (Ignition switch +12V) | Main ECU power | | C16 | E (Sensor ground return) | | ❗ These are not interchangeable – using the
If you have the ECU but no diagram:
This is tedious but reliable for missing pinouts.
| Suffix Example | Common Vehicle | Engine | Key Pinout Differences | | :--- | :--- | :--- | :--- | | -0D030 / 0D090 | Toyota Land Cruiser (J100/J120) | 2UZ-FE (V8) | 4 Oxygen sensors, IMMO box communication, 5-speed auto | | -2J170 / 2J180 | Toyota Hilux / Fortuner (AN10/AN20) | 1GR-FE (V6) / 2KD-FTV | Mechanical throttle position sensor, diesel glow plug control | | -1A240 | Toyota Corolla (E120/E130) | 1ZZ-FE / 3ZZ-FE | VVT-i solenoid, knock sensor, 4-speed auto logic | | -0D040 | Toyota RAV4 (ACA2#) | 2AZ-FE | Electronic throttle (ETCS-i), LIN bus for alternator | | -0D100 | Toyota Camry (ACV30) | 2AZ-FE | Immobilizer coil driver built-in |
The Takeaway: Before you look for a pinout, locate the full 10-12 digit number on the sticker attached to the metal casing of the ECU.