Always check the E2 (Sensor Ground) . A poor ground here will cause erratic idle and "Ghost" sensor codes. Conclusion
While pin locations can vary slightly by region (e.g., Thai-spec vs. Euro-spec), the following are the critical "Must-Know" pins for wiring or diagnostics: 1. Power and Ground Switched 12V power from the EFI Main Relay. BATT: Constant 12V from the battery (maintains DTC memory). VC: 5V Sensor Reference Power (supplies the MAP and TPS). toyota 2kdftv ecu pinout diagram best
Immobilizer Input/Output. If you are doing an engine swap, the ECU will look for a "handshake" here. If it doesn't receive it, the injectors will remain locked. Wiring for Swaps: The "Standalone" Essentials Always check the E2 (Sensor Ground)
Crankshaft Position Sensor. The ECU uses this to determine RPM and timing. Thai-spec vs. Euro-spec)