A) Check the density of the electrolyte in each cell in a fully charged battery at 20°C.
- Density - 1.25 - 1.27
If the density is not within the specified limits, then charge the battery.
b) Check the amount of electrolyte in each cell.
If the amount of electrolyte is insufficient, then top up with distilled water.
2. Check the battery terminals, fuses and fuses.
A) Check for loose or corroded battery terminals.
b) Check the integrity of the fuses and fuses.
3. Check the condition of the drive belts.
A) Visually inspect the belt for cracks, oiling and wear. Check for clearance between the belt and the bottom surface of the pulley groove. If the belt has any of the indicated defects, then replace it.
b) Measure the deflection of the belt at the location indicated in the figure
- Force - 98 N
Belt deflection:
- new - 7-10 mm
- used - 10-15 mm
If the deflection does not correspond to the specified one, then adjust it.
Note: Term " Used belt" refers to a belt that has been used on a running engine for more than 5 minutes.
After installing a new belt, leave the engine running for about five minutes and recheck the deflection.
V) (Reference data).
Using the special tool, measure the drive belt tension.
Drive belt tension:
- new belt - 45-55 kg
- used - 20-35 kg
If the belt tension is not correct, adjust it.
4. Visually inspect the wires going to the generator, check the reliability of their connection, the condition of the wiring, as well as the presence of extraneous noise coming from the generator when the engine is running.
5. Check up a chain of a control lamp of the category of the accumulator.
A) Warm up the engine to operating temperature, then shut it off.
b) Disable all accessories.
V) Turn the ignition key to the on position "ON". The battery discharge indicator lamp should light up.
G) Start the engine. The lamp should go out.
If conditions are not met, check the test lamp circuit.
6. Checking the electrical circuit of the generator without load (at idle).
Note: If you have a tester to check the alternator and battery, connect the latter in accordance with the manufacturer's instructions.
A) If you don't have a tester, do the following:
- Disconnect the wire from the generator output "IN" and connect it to the negative terminal of the ammeter.
- Connect the wire from the positive terminal of the ammeter to the terminal "IN" generator.
- Connect the positive lead of the voltmeter to the lead "IN" generator.
- Connect the negative terminal of the voltmeter to ground.
b) Measure the alternator output voltage and current from idle to 2000 rpm.
(Without electronic regulator)
- Current strength - no more than 10 A
- Output voltage - 14.0 -15.0 V (at 25°C)
If the voltage is not within the specified limits, replace the voltage regulator.
7. Check the charging circuit under load.
A) With the engine running at 2000 rpm, turn on the high beam headlights and turn the heater fan switch to "HI".
b) Check the ammeter reading.
- Current strength - not less than 30 A
If the ammeter reading is less than the specified value, repair the generator.
Note: With a fully charged battery, the reading will be slightly less than the indicated value.