While positions vary, Denso universally utilizes specific pin labeling nomenclature across their databases: Common Function Troubleshooting Note Main Battery Voltage Should read 12V constant even when the key is out. IGSW Ignition Switch Signal Toggles 12V only when the ignition key is turned to "ON". E01 / E02 Engine/Power Grounds Must have zero resistance to the negative battery terminal. VC / VCC 5V Sensor Reference Power Clean 5V output sent from ECU to power sensors. CAN-H / CAN-L CAN communication lines
: For custom builds, knowing which pin controls fuel injectors, ignition coils, or the fuel pump relay is vital for successful wiring integration. Key Locations for Denso ECU Pinouts denso ecu pinout database