Car engine electrical equipment VAZ-2121

Rechargeable battery — technical characteristics
Battery type - 6ST-55P Rated voltage, V - 12 Rated capacity at a 20-hour discharge mode and an electrolyte temperature of 25°C at the beginning of the discharge, Ah - 55 Discharge...

Possible battery malfunctions, their causes and solutions
Battery discharge while driving Electrolyte on the surface of the battery

Bringing a dry-charged battery into working condition
Vehicles leaving the factory are equipped with rechargeable batteries filled with electrolyte and charged. Batteries are delivered to spare parts without electrolyte, dry-charged....

Checking the electrolyte level
The electrolyte level should be 5-10 mm higher than the upper edge of the separators or the safety shield and not rise above the lower edge of the indicator 7 (pic. 7-3). Pic....

Checking the degree of battery discharge
To determine the degree of discharge of the battery, the density of the electrolyte is measured (tab. 7-3) automotive hydrometer. Table 7-3. Electrolyte density at 25°С, g/cm 3 If...

Battery charge
Carefully clean the battery removed from the vehicle, especially its upper part, and check the electrolyte level. The battery is charged with a current of 5.5 A for several hours...

Generator — technical characteristics and device
Rated voltage, V, — 12 Direction of rotation - Right (drive side) Maximum output current at 14 V and rotor speed 5000 min -1 , A - 42 Maximum rotor speed, min -1 — 13000 Gear...

Possible malfunctions of the generator, their causes and methods of elimination
The control lamp burns or periodically lights up when the car is moving The control lamp does not light up when the ignition is switched on The generator is running, the battery...

Generator Repair Precautions
1. «The battery negative must always be connected to «weight», A «plus» - connect to clamp «30» generator. An erroneous reverse connection of the battery will immediately cause an...

Generator checks
Checking the generator on the car If the battery charge control lamp is on when the engine is running, then you can roughly determine the health of the generator as follows:...

Generator repair
Generator disassembly Removing nuts from extension 21 (pic. 7-9) contact bolt and unscrewing the fastening screws, remove the protective cover 19 with the hose. Disconnect the...

Voltage Regulator — Device and Warnings
The appearance of the voltage regulator is shown in fig. 7-10, and the internal connection diagram is shown in fig. 7-11. Pic. 7-10. Voltage regulator RR-380: 1 - protective...

Voltage regulator — check and adjustment on the stand
Data for checking and adjusting Adjustable voltage at regulator and ambient temperature of 50±3°С, V: at the second stage — 14.2±0.3 at the first stage is lower than at the...

Determining Voltage Regulator Faults
If the battery on the car is constantly recharged, then it is necessary, without removing the voltage regulator, to check it under the following conditions: the battery must be...

Voltage Regulator Repair
Repair of the voltage regulator should be made only in exceptional cases, it is recommended to replace it. To repair the regulator, the following operations are allowed. Cover and...

Relay of a control lamp of a charge of the storage battery
Relay type PC-702 is used to turn on the control lamp on the instrument panel when the generator voltage is not enough to charge the battery. The relay is installed in the engine...

Starter — technical characteristics and device
Rated voltage, V - 12 Rated power, kW - 1.3 Current consumption at maximum power, no more than, A - 260 Consumed current in the inhibited state, no more than, A - 500 Current...

Possible malfunctions of the starter, their causes and methods of elimination
When the starter is turned on, the armature does not rotate, the traction relay does not work When the starter is turned on, the armature does not rotate or rotates too slowly,...

Checking the starter on the stand
To verify the efficiency of the starter, it is necessary to check its electrical and mechanical data on the stand. The electrical connection diagram for testing the starter on the...

Starter repair
Faults or damage are eliminated by replacing defective parts. The only repair operation that can be performed is the turning of the manifold. Disassembly Unscrew the nut on the...

Electrical diagram of the ignition system
The electrical circuit of the ignition system is shown in fig. 7-18. Pic. 7-18. Ignition system connection diagram: 1 - spark plugs; 2 - ignition distributor; 3 - ignition coil; 4...

Possible ignition malfunctions, their causes and methods of elimination
Engine won't start Engine runs erratically or stalls at idle The engine runs unevenly and unstably at a high crankshaft speed Interruptions in the engine at all speeds The engine...

Setting the ignition timing
To check the ignition timing, there are three marks 1, 2 and 3 (pic. 7-19) on the cover of the timing mechanism drive and mark 4 on the crankshaft pulley, corresponding to the...

Checking and adjusting the gap between the contacts of the breaker and in the ignition distributor
Check the gap between the breaker contacts in the following order: put the gearshift lever in neutral position and brake the car with a parking brake; by rotating the crankshaft,...

Checking ignition devices on the stand
Distributor Attention. Until 1980, ignition distributors of the R-125 V type were used on engines (pic. 7-20). Since 1980, along with the carburetor 2107-1107010-20, ignition...