Do not start the engine without a secure battery connection.
Do not use fast chargers to start the engine.
Do not disconnect the battery while the engine is running.
Disconnect the battery from the on-board network when charging the battery.
Before checking the electronic injection system, you must make sure that the ignition is working properly, that is, the ignition timing must be adjusted and the candles must be in order.
At temperatures above 80°C (finding a car in a heat chamber) the control unit must be removed.
Check the reliability of the docking of the plug connections.
Do not dock or disconnect the control unit connector with the ignition on.
Turn off power to the fuel pump relay when checking engine compression. Relay location.