Checking the voltage regulator on the generator 37.3701
a – produced since 1996.; b – produced before 1996.; 1 – battery; 2 – voltage regulator ground terminal; 3 – voltage regulator; 4 - output "W" of the controller; 5 – output "B" of the regulator; 6 – control lamp; 7 – terminal "B" of the voltage regulator
Checking the voltage regulator of the G-222 generator
1 – battery; 2 – voltage regulator; 3 – control lamp
The operation of the voltage regulator consists of continuously and automatically changing the excitation current of the generator so that the generator voltage is maintained within specified limits when the rotation speed and load current of the generator change.
Check on the car
1. To check, you need a DC voltmeter with a scale of up to 15–30 V, accuracy class no worse than 1.0.
2. After 15 minutes of engine operation at medium speed with the headlights on, measure the voltage between terminal "30" and the generator ground. The voltage should be within 13.6–14.6 V.
3. If there is systematic undercharging or overcharging of the battery and the regulated voltage does not fall within the specified limits, the voltage regulator must be replaced.
Checking the removed regulator
1. The regulator removed from the generator is checked according to the diagrams shown in Fig. Checking the voltage regulator of the 37.3701 generator and Fig. Checking the voltage regulator of the G-222 generator. It is better to check the 37.3701 generator regulator used before 1996 together with the brush holder (see fig. Checking the voltage regulator on the generator 37.3701, b), since in this case it is possible to immediately detect breaks in the brush terminals and poor contact between the terminals of the voltage regulator and the brush holder.
2. Between the brushes (or between the terminals "W" and "B" of the regulator at the generator G-222), turn on the lamp 1-3 W, 12 V. To the conclusions "C", "B" (if there is one) and connect a power source with a voltage of 12 V to the regulator ground, and then with a voltage of 15–16 V.
3. If the regulator is working properly, then in the first case the lamp should light up, and in the second case it should go out.
4. If the lamp lights up in both cases, then there is a breakdown in the regulator, and if it does not light up in both cases, then either there is a break in the regulator, or there is no contact between the brushes and the terminals of the voltage regulator (generator 37.3701 manufactured before 1996.).
(The article is taken from the website: «VAZbook.ru»)