The main power supply to the electronic control circuit is protected by a fuse (fuse #27 - 15 A up to model 1994, fuse #16 - 20 A from model 1995) located in the fuse and relay box in the engine compartment above the right wheel near the battery. Turning the ignition key (to position II or III) turns on the power supply. Voltage is supplied to terminal 15 of the main power supply to the electronic control unit and also to the terminals of the cold injection advance relay (terminal 86 of the relay up to model 1994, terminal 15 of the relay from model 1995). At the same time, power is supplied to terminal 2 of the electromagnetic vacuum valve and also to terminal 7 of the electronic control unit.
In vehicles prior to 1994, turning the ignition key causes a parallel supply of power via fuse #5 (20-A) located in the engine compartment fuse box to contact 87 of the cold engine injection advance relay. In vehicles since 1995, this power is protected by fuse #13 (20-A).
The ground connection of contact 14 of the electronic control unit closes the power circuit of the cold engine injection advance relay and causes the supply of power to the cold engine injection advance corrector. The ground connection occurs when the starter is engaged and lasts until the engine reaches normal operating temperature.
