Attention! A discharged battery can freeze even at minimum temperatures below 0:C. If the battery is frozen, it is not possible to start from the battery of another vehicle - risk of explosion! Do not allow bare terminals to touch - risk of short circuit! The positive cable connected to the battery must not come into contact with conductive parts of the vehicle - risk of short circuit! Do not connect the jumper cable to the negative terminal of a dead battery. The explosive gas escaping from the battery can ignite as a result of sparking during start-up. Route the cables so that they do not come into contact with rotating parts in the engine compartment. Do not lean over the battery - danger of chemical burns! The plugs on the battery banks must be firmly screwed on. It is forbidden to start the engine from an external source (e.g. from another vehicle) when the electrolyte level in the battery is low.
Carefully! There should be no contact between the car bodies, otherwise the current will begin to flow already when the positive poles are connected. A discharged battery must be properly connected to the on-board network.
Connection diagram at start-up: A - discharged battery, B - supply battery
If the engine cannot be started due to a discharged battery, the battery of another vehicle can be used to start the engine. This will require wires to start from the auxiliary battery. Starter cables must be connected in the following sequence: fasten terminal 1 to the positive pole of the discharged battery A. Fasten terminal 2 to the positive pole of starting battery B. Fasten terminal 3 to the negative pole of starting battery B. Fasten terminal 4 to a massive metal part rigidly connected to the block. cylinders, or on the cylinder block itself.
Engine start
Start the engine of the donor vehicle and let it idle. Start the engine of the vehicle with the discharged battery. If the engine does not start, turn off the starter after 10 seconds and try again in half a minute. Disconnect the jump leads in the reverse order as described above. The nominal voltage of both batteries must be 12 V. Capacity (Ah) of a charged battery used for starting should not differ much from the capacity of a discharged battery.
Wires for starting the engine from an external power source
Only use starter wires with sufficient gauge and insulated pole clamps. Follow the instructions of the jumper cable manufacturer. The positive cable is usually red. The negative cable is black in most cases.
Starting the engine from the battery of another car on a car with a start-stop system
Engine ground connection point: START-STOP system
On vehicles with a start-stop system, the negative cable from the battery of another vehicle must not be connected directly to the negative terminal of its own battery - only to the engine ground connection point.