unswitched power directly from the EFI fuse to maintain ECU KAM (Keep Alive Memory). Switched
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For further information and support, consider the following resources: unswitched power directly from the EFI fuse to
If you are testing for a condition, always check the MREL (Main Relay) and +B pins first to ensure the ECU is actually receiving power when the key is on. Wiring Diagram ECU 2KD FTV PDF - Scribd toyota 2kdftv ecu pinout diagram better