Sonata GL V6-2.5L (1999)
Voltage Regulator: Testing and Inspection
REGULATED VOLTAGE TEST
The purpose of this test is to check that the electronic voltage regulator controls voltage correctly.
PREPARATION
1. Prior to the test, check the following items and correct if necessary.
1. Check the battery installed on the vehicle is fully charged. For battery checking method, see "BATTERY".
2. Check the generator drive belt tension. For belt tension check, see section, "COOLING".
2. Turn ignition switch to "OFF".
3. Disconnect the battery ground cable.
4. Connect a digital voltmeter between the "S" terminal of the generator and ground. Connect the (+) lead of the voltmeter to the "S" (L) terminal of
the generator. Connect the (-) lead to good ground or the battery (-) terminal.
5. Disconnect the generator output wire from the generator "B" terminal.
6. Connect a DC ammeter (0 to 100A) in series between the "B" terminal and the disconnected output wire. Connect the (-) lead wire of the ammeter
to the disconnected output wire.
7. Attach the engine tachometer and connect the battery ground cable.
TEST
1. Turn ON the ignition switch and check to see that the voltmeter indicates the following value.
Voltage:................. Battery voltage
If it reads 0V, there is an open circuit in the wire between the generator "S"(L) terminal and the battery (+), or the fusible link blown.
2. Start the engine. Keep all lights and accessories off.
3. Run the engine at a speed of about 2,500 rpm and read the voltmeter when the generator output current drops to 10A or less.
RESULT
1. If the voltmeter reading agrees with the value listed in the Regulating Voltage Table below, the voltage regulator is value, the voltage regulator or
the generator is faulty.
