Start the engine only from a 12 V battery or from an external current source.
Do not disconnect the battery while the engine is running.
During accelerated charging, disconnect the battery from the vehicle's on-board network.
Before checking the injection system, make sure that the ignition system is in order, i.e. ignition timing and spark plugs meet specification requirements.
When the vehicle temperature is over 80°C (e.g. drying after painting) remove the computer.
Check that all connectors are securely connected.
Do not disconnect or connect computer connectors with the ignition on.
Disconnect the fuel pump relay when checking compression.
Multec injection system
1 - diagnostic connector ALDL (in vehicles Vectra is located on the left rear in the engine compartment near the octane code connector)
2 - computer
3 - fuel pump relay (in Vectra cars it is located in the relay box at the left shock absorber strut)
4 stepper carburetor throttle motor
5 - nozzle
6 - throttle potentiometer
7 - switch "parking/neutral"
8 - distance sensor (in vehicles Vectra is located at the instrument panel)
9 - coolant temperature sensor
10 - intake manifold pressure sensor
11 - fuel pressure regulator
12 - ignition distributor
13 - lambda probe connector
14 - lambda probe
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