Toyota 89661 Ecu Pinout |link| [TOP]
2. Late 90s to Early 2000s JDM/USDM (e.g., 1JZ-GTE VVTi, 2JZ-GTE, 3S-GE Beams)
Measure voltage between VC and E2 with the ignition on. If it does not read exactly 4.5V to 5.5V, the ECU is either missing power, missing a ground, or an external sensor is shorted internally and pulling the voltage down.
Take a clear picture of the sticker on your ECU casing. Write down the full 10-digit number (e.g., 89661-12340 ) as well as the manufacturer line below it (usually or Fujitsu Ten ). Step 2: Open the ECU Case (Optional but Recommended) toyota 89661 ecu pinout
CANH (Pin 11) and CANL (Pin 19) are standard for many 2015+ models on the A38 connector. Ground (E1): Frequently located at C45-81 . 3. Older Models (22RE, 1UZ-FE, 1JZ-GTE)
Wire color is a secondary identifier. Toyota uses "Lg-B" (Light Green-Black) for TPS on one car and "L-Y" (Blue-Yellow) for TPS on another. Always verify by pin position first. Take a clear picture of the sticker on your ECU casing
Understanding your Toyota 89661 Engine Control Unit (ECU) pinout is essential for engine swaps, diagnostic troubleshooting, or wiring aftermarket electronics. The part number prefix is Toyota’s universal designation for an Engine Control Module (ECM/ECU). However, because Toyota has used this prefix across dozens of engines and generations—from the legendary 1JZ/2JZ to the utilitarian 1Raze and modern dual-VVTi platforms—identifying the exact wiring configuration requires a systematic approach. 1. Deconstructing the Toyota 89661 Part Number
Understanding your Toyota’s Engine Control Unit (ECU) wiring is essential for diagnostics, engine swaps, or aftermarket tuning. The part number prefix is Toyota’s universal identifier for an engine computer, used across models like the Camry, Corolla, Tacoma, Supra, and Hilux. Because this number applies to hundreds of different engines, locating the exact pinout requires matching the specific model, year, and engine code. Ground (E1): Frequently located at C45-81
The Grey/White "OBD1 & Early OBD2" Era (Mid 90s – Early 2000s)
Before you look for a pinout, locate the full 10-12 digit number on the sticker attached to the metal casing of the ECU.
If the engine starts for one second and immediately dies, check the continuity of the IGF wire between the igniter/coil packs and the ECU.
