Vauxhall Workshop Service and Repair Manuals

Hybrid Engine Control Units  

The following engines are equipped, like the X 10 XE in the Corsa-B, with hybrid engine control units.  

Engine	Engine management system	Installation position	Flash-programming
X 12 XE	Motronic M 1.5.5	On intake module	yes
X 14 XE / X 16 XEL	Multec-S	On cylinder head	no
X 18 XE1	Simtec 70	On intake module	yes
X 20 XEV	Simtec 70	Near battery	yes

The main features of the hybrid control units are:  

•  Compact design  

•  Installed in engine compartment  

•  Separate wiring harness plug for instrument panel and engine wiring harness connections  

The hybrid design of the engine control units makes the modules compact and able to withstand impact, vibration and temperature.  

These factors make it possible to install the engine control units in the engine compartment, leading to a shorter wiring harness.  

The engine control units have separate wiring harness plugs for the instrument panel wiring harness and for the engine wiring harness. This separation simplifies disconnection of the body wiring harness from the engine control unit and therefore accelerates removal of the engine.  

The relevant installation positions and the design versions are shown in the corresponding surveys of the engine compartments in section 2.