Control Unit
The Simtec 56.1 electronic control unit is located on the left in the engine compartment, in front of the left spring strut dome, in the relay frame.
The functions for the DIS ignition system, the knock control system and the EGR system have been integrated into the control unit and the characteristic maps have been adapted.
Version coding is possible via TECH 1.
Control unit part numbers:
| Engine | Opel Part No. | Opel Part / Catalogue No. |
|---|---|---|
| (Production) | (Service) | |
| X 20 XEV | 90 378 653 | 90 509 218 / 12 37 647 |