To avoid personal injury and/or damage to the electronic ignition system, the following requirements must be observed when working on a vehicle with an electronic ignition system.
Do not touch high voltage wires with your hand while the engine is running or when the crankshaft is turned by the starter.
Disconnect ignition system wires only when ignition is off. When ignition is on, vibrations from the ignition distributor can cause a high-voltage electric shock.
Connect and disconnect measuring instruments (crankshaft speed meter, ignition timing tester) only when the ignition is off.
Do not connect the interference protection capacitor or the test lamp to the ignition coil ground connector.
Do not connect measuring instruments or a strobe light to the positive terminal of the ignition coil to check the ignition system while the engine is running.
Do not replace the ignition coil with a coil of a different design.
Do not heat the car to a temperature higher than +80°C (for example, when varnishing or steaming). Start the engine only after it has cooled down a little.
Wash the engine only with the ignition off.
Before performing electric arc and spot welding, the battery must be completely disconnected from the vehicle's electrical system.
Persons with a pacemaker are not allowed to carry out any work on electronic ignition systems.
For vehicles with catalytic converter only:
Before turning on the ignition, it is necessary to put the high-voltage wire tips on all spark plugs. If it is necessary to check for the presence of an ignition spark during maintenance, then this should be done only for the spark plug of one cylinder. In this case, it is necessary to ensure good contact of the spark plug with the ground. When connecting the spark plug to the ground (for example, to the crankcase), the tip of the spark plug or, respectively, the high-voltage wire should not be taken by hand, but with a well-insulated clamp.
Before checking the compression, disconnect the fuel pump relay and disconnect the ignition coil connector.