E4 connector goes to A in the ECU which is the most right connector. There are two connectors used, one for signals/power and one for CAN.
| Connector Function | DT Connector | DT Pin | Connected to | Function | Notes |
| Can Bus | DT04-4P | 1 | A24 CANL | Can Low | 120 Ohm termination |
| – | – | 2 | A25 CANH | Can High | 120 Ohm termination |
| – | – | 3 | A4 Bat, Power and signal Connector Pin 11 | +12V | |
| – | – | 4 | Power and signal Connector Pin 12 | Ground | |
| Power and signal Connector | DT06-12S | 1 | A2 EC | Ground | |
| – | – | 2 | A17 IGSW | Ignition | Fuse IGN 7.5A |
| – | – | 3 | A5 B+ | Switched 12V | from EFI Main Relay (Fused with 25A EFI Fuse) |
| – | – | 4 | A10 RFC | Switches the OEM ECU cooling fan | Apparently also switches the fans? https://www.drive2.ru/l/521440641767441338/ |
| – | – | 5 | A12 STA | Gets 12V from Starter Relay when cranking | Fused with 7.5A |
| – | – | 6 | A14 FC | Switch a stage of the original fuel pump system. | Not needed with external fuel pressure regulation |
| – | – | 7 | – | – | – |
| – | – | 8 | A15 FPR | Switch a stage of the original fuel pump system. | Not needed with external fuel pressure regulation |
| – | – | 9 | A13 MREL | Switches the EFI Main Relay | EFI Relay provides to A5 and A6 |
| – | – | 10 | A6 B+ | Switched 12V | from EFI Main Relay (Fused with 25A EFI Fuse) |
| – | – | 11 | A4 BAT | Constant 12V to ECU memory and can bus | Fused with 25A EFI Fuse |
| – | – | 12 | Can Connector Pin 4 | Ground for Can |