Description of the control system design (Opel Zafira A)

The engine management system is a complex system designed to prepare the fuel-air mixture in the proportion and quantity required for various engine operating modes, supply this mixture to the cylinders and ignite it. The engine management system includes an electronic control unit (ECU), information sensors (based on their signals, the ECU determines the engine operating mode) and actuators (serve directly to change the composition and quantity of the fuel-air mixture supplied to the engine cylinders and the moment of its ignition). To clean the fuel and air entering the engine cylinders, fuel and air filters are used, respectively.

Location of the main elements of the engine control system 1.4 and 1.6 DOHC of the Astra car (decorative engine cover removed):
1 - air filter;
2 - purge valve of the adsorber;
3 - air supply pipe;
4 - sensor for temperature of air entering the cylinders;
5 - camshaft position sensor (located under the upper timing belt cover);
6 - throttle assembly;
7 - absolute pressure sensor in the intake manifold;
8 - fuel rail;
9 - exhaust gas recirculation valve;
10 - fuse and relay mounting block;
11 - fuse box;
12 - relay block;
13 - Electronic control unit of the engine control system (ECU);
14 - ignition module;
15 - oxygen concentration control sensor;
16 - coolant temperature sensor.

Location of the main elements of the engine management system 1.8 DOHC car Zafira (decorative engine cover removed):
1 - air filter;
2 - purge valve of the adsorber;
3 - air supply pipe;
4 - mass air flow sensor;
5 - camshaft position sensor (located under the upper timing belt cover);
6 - throttle assembly;
7 - fuel rail;
8 - Electronic control unit of the engine control system (ECU);
9 - fuse and relay mounting block;
10 - fuse box;
11 - Cruise control unit (if installed);
12 - exhaust gas recirculation valve;
13 - ignition module;
14 - coolant temperature sensor.

[Information taken from the website OPELBOOK]

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Checking the article: Chernov Alexander

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Opel Zafira A: Control system

Engine Management System — Reference Data

Information sensors
Executive devices
Safety precautions for maintenance and repair of the engine management system
Engine management system — technical condition check and fault diagnostics
Fuel line — checking operating pressure
Fuel Line — Pressure Relief