Preparing for the test
1. Check the following items before testing:
- a) the condition of the battery installed in the car;
Note. The battery that is used to test the current generated by the generator must be partially discharged. With a fully charged battery, the test cannot be performed due to insufficient generator load.
- b) alternator drive belt tension.
2. Turn off the ignition.
3. Disconnect a wire from the negative plug of the storage battery.
4. Disconnect the wire from the terminal «IN» generator.
5. Connect a DC ammeter with a range of 0-100 A in series between the terminal «IN» and a wire disconnected from the generator. Make sure that the ammeter negative probe is connected to the wire disconnected from the generator.
Note. Connect the wires and probes of the ammeter very securely, as a lot of current will flow through the circuit.
6. Connect a voltmeter (0-20V) to terminal «IN» generator and «mass».
Make sure the positive lead of the voltmeter is connected to the terminal «IN» generator.
7. Connect a tachometer and a wire to the negative plug of the storage battery.
8. Leave the hood open.
Examination
1. Check that the voltmeter scale is clearly visible to determine the voltage value. If the voltmeter shows a voltage of 0 V, then the electrical circuit connecting the terminal is not closed «IN» alternator and the negative terminal of the battery, a fusible link has blown or an unreliable connection with «weight».
2. Start the engine and turn on the headlights.
3. Turn on the high beam headlights and the heater fan to the maximum air supply mode. Briefly increase the engine speed to 2,500 min-1 and read the readings on the gauges, while the ammeter will show the maximum current generated by the generator.
Note. After starting the Hyundai Getz engine, the battery charge current decreases very quickly, so this test must be performed very quickly.
Result of checking
1. The ammeter reading must exceed the limit value. If the current value is less than the limit value, and the wire connecting the generator output is in order, remove the generator from the car and check it.
Current limit:
- generator 70A: not less than 49.0 A
- generator 90A: not less than 63.0 A
Note.
- 1. The rated current is indicated on the plate attached to the generator case.
- 2. The current generated by the generator depends on temperature and load. Therefore, to obtain the current limit, partially discharge the battery by first turning on the headlights on the car with the engine off.
The generator current limit cannot be obtained if the temperature of the generator or the ambient air is too high.
2. After completing the alternator current limit test, run the engine to idle and turn off the ignition.
3. Disconnect a wire from the negative plug of the storage battery.
4. Remove the tachometer, voltmeter and ammeter.
5. Connect the wire to the terminal «IN» generator.
6. Connect a wire to the negative plug of the storage battery.