Toyota 89661 Ecu Pinout Best Jun 2026
These often use 26-pin, 16-pin, and 22-pin configurations. The High-Density Lever Lock Era (2000s – Present) Found on 1ZZ-FE, 2GR-FSE, and modern VVTi engines.
Installing a 89661-0D150 (Camry) into a 89661-48B10 (Corolla) will not work. The immobilizer, CAN bus addressing, and pin assignments are different. You will likely blow a fuse or fry the ECU.
| Pin | Typical Color | Function | Notes | | :--- | :--- | :--- | :--- | | | | BATT (E5-1) | White/Red (W-R) | Main ECU power (constant +12V) | Fused directly from battery | | +B (E5-2) | Black/Red (B-R) | Main relay power | Switched +12V via EFI relay | | E1, E2, E01 | Brown/White (Br-W) | Power grounds | Must have continuity to engine block | | Sensors | | VTA (E6-22) | Light Green/Black (Lg-B) | Throttle Position Sensor (TPS) signal | 0.5V idle / 4.5V WOT | | E2 (E6-14) | Brown (Br) | Sensor ground (TPS, MAP, etc.) | Do not connect to chassis ground | | THW (E5-7) | Yellow/Blue (Y-B) | Engine Coolant Temp (ECT) sensor | High voltage when cold | | G2, NE+ (E6-9/10) | Shielded cable | Crankshaft position sensor (CKP) | AC voltage, 200-500mV cranking | | Actuators | | #10, #20, #30 (C-connector) | Various | Fuel injector drivers | Ground-switched by ECU | | IGT1-4 (B-connector) | Various | Ignition timing signals to igniter | 5V square wave | | FC (E5-23) | Green/Red (G-R) | Circuit opening relay (fuel pump) | Ground to turn fuel pump ON | | Communication | | SIL (E5-20) | Violet/White (V-W) | Check engine light (MIL) control | Grounds to illuminate | | TC (E5-19) | Black (B) | Diagnostic port (TE1) | Jumper to E1 to flash codes | | CANH / CANL (E4-5/E4-6) | Twisted pair | OBD-II CAN bus | 60 ohms resistance between pins | toyota 89661 ecu pinout
Camshaft position sensors used to establish cylinder sequential timing. VTA / VTA2: Throttle Position Sensor (TPS) signal inputs. THA: Intake Air Temperature (IAT) sensor input. THW: Engine Coolant Temperature (ECT) sensor input.
Ultimately, the "toyota 89661 ecu pinout" is not a single document but a key to unlocking a vast database of technical information. By understanding the part number, correctly identifying your ECU's connectors, and using the right resources, you can safely diagnose, repair, or upgrade your Toyota's engine management system. These often use 26-pin, 16-pin, and 22-pin configurations
Typically 4 to 5 grey or white connectors, utilizing smaller, higher-density pins to accommodate advanced emissions and automatic transmissions. 3. All-in-One Engine Bay Connectors (Mid 2000s – Present) Common Engines: 1GR-FE, 2GR-FE, 1ZZ-FE, 2ZR-FE.
Identifying physical connector types helps match your ECU to known diagrams. Pin assignments vary by manufacturer—Denso, Fujitsu, and Mitsubishi each have their own conventions. The immobilizer, CAN bus addressing, and pin assignments
Never rely solely on the "89661" prefix. To find the correct wiring diagram, you must decode the full part number found on the ECU casing sticker.
Never splice sensor grounds ( E2 ) into chassis grounds ( E1 ). Doing so introduces electrical noise into sensitive voltage loops, causing erratic idle, ghost fault codes, and poor drivability.
High-current power grounds for injectors and coils.