Hyundai Tiburon (2003 year). Manual — part 11

PREPARATION

TEST

RESULT

3. Upon completion of the test, set the engine speed at idle. Turn off the head lamps, blower motor and the ignition switch.

1. Prior to the test, check the following items and correct as necessary.

Check the battery installed in the vehicle to ensure that it is in good condition. The battery checking method is described in
"BATTERY".
The battery that is used to test the output current should be one that has been partially discharged. With a fully charged
battery, the test may not be conducted correctly due to an insufficient load.
Check the tension of the generator drive belt. The belt tension check method is described in the section "COOLING".

2. Turn off the ignition switch.

3. Disconnect the battery ground cable.

4. Disconnect the generator output wire from the generator "B" terminal.

5. Connect a DC ammeter (0 to 150A) in series between the "B" terminal and the disconnected output wire. Be sure to

connect the (-) lead wire of the ammeter to the disconnected output wire.

Tighten each connection securely, as a heavy current will flow. Do not rely on clips.

6. Connect a voltmeter (0 to 20V) between the "B" terminal and ground. Connect the (+) lead wire to the generator "B"

terminal and (-) lead wire to a good ground.

7. Attach an engine tachometer and connect the battery ground cable.

8. Leave the engine hood open.

1. Check to see that the voltmeter reads as the same value as the battery voltage. If the voltmeter reads 0V, and the open

circuit in the wire between the generator "B" terminal and battery (-) terminal, a blown fusible link or poor grounding is
suspected.

2. Start the engine and turn on the headlights.

3. Set the headlights to high beam and the heater blower switch to HIGH, quickly increase the engine speed to 2,500 rpm and

read the maximum output current value indicated by the ammeter.

After the engine starts up, the charging current quickly drops. Therefore, the above operation must be done quickly to
read the maximum current value correctly.

1. The ammeter reading must be higher than the limit value. If it is lower but the generator output wire is in good condition,

remove the generator from the vehicle and test it.

PREPARATION

TEST

63A min.
84A min

• The nominal output current value is shown on the nameplate affixed to the generator body.

• The output current value changes with the electrical load and the temperature of the generator itself. Therefore, the

nominal output current may not be obtained. If such is the case, keep the headlights on to cause discharge of the
battery.
The nominal output current may not be obtained if the temperature of the generator itself or ambient temperature is
too high.
In such a case, reduce the temperature before testing again.

2. Upon completion of the output current test, lower the engine speed to idle and turn off the ignition switch.

3. Disconnect the battery ground cable.

4. Remove the ammeter and voltmeter and the engine tachometer.

5. Connect the generator output wire to the generator "B" terminal.

6. Connect the battery ground cable.

1. Prior to the test, check the following items and correct if necessary.

Check that the battery installed in the vehicle is fully charged. For battery checking method, see "BATTERY".
Check the generator drive belt tension. For belt tension check, see "COOLING" section.

2. Turn ignition switch to "OFF".

3. Disconnect the battery ground cable.

4. Connect a digital voltmeter between the "B" terminal of the generator and ground. Connect the (+) lead of the voltmeter to

the "B" 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 150A) 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.

1. Turn on the ignition switch and check to see that the voltmeter indicates the following value.

Battery voltage

RESULT

If it reads 0V, there is an open circuit in the wire between the generator "B" terminal and the battery (-), or the fusible link is
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.

1. If the voltmeter reading agrees with the value listed in the Regulating Voltage Table below, the voltage regulator is

functioning correctly. If the reading is other than the standard value, the voltage regulator or the generator is faulty.
Regulating Voltage Table

Voltage regulator ambient temperature °C (°F)

Regul ating voltage (V)

-20 (-4)

20 (68)

60 (140)
80 (176)

14.2 ~ 15.4
14.0 ~ 15.0
13.7 ~ 14.9
13.5 ~ 14.7

2. Upon completion of the test, reduce the engine speed to idle, and turn off the ignition switch.

3. Disconnect the battery ground cable.

4. Remove the voltmeter and ammeter and the engine tachometer.

5. Connect the generator output wire to the generator "B" terminal.

6. Connect the battery ground cable.

1. Be sure to check the following before testing:

Generator installation and wiring connections
Generator drive belt tension
Fusible link
Abnormal noise from the generator while the engine is running

2. Turn the ignition switch to the OFF position.

3. Disconnect the negative battery cable.

4. Disconnect the generator output wire from the generator "B" terminal. Connect a DC test ammeter with a range of 0-150A in

series between the "B" terminal and the disconnected output wire. (Connect the (+) lead of the ammeter to the "B" terminal.
Connect the (-) lead of the ammeter to the disconnected output wire).

An inductive-type ammeter which enables measurements to be taken without disconnecting the generator output wire
is recommended. Using this equipment will lessen the possibility of a voltage drop caused by a loose "B" terminal
connection.

5. Connect a digital-type voltmeter between the generator "B" terminal and the battery (+) terminal. (Connect the (+) lead of

the voltmeter to the "B" terminal. Connect the (-) lead of the voltmeter to the battery (+) cable.)

6. Reconnect the negative battery cable.

7. Connect a tachometer or the scan tool.

8. Start the engine.

9. With the engine running at approx. 2500 r/min, turn the headlights and other lights on and off to adjust the generator load

on the ammeter slightly above 30A.

max. 0.3V

When the generator output is high and the value displayed on the ammeter does not decrease to 30A, set the value to
40A.Read the value displayed on the voltmeter. In this case the limit becomes max. 0.4V.

10. If the value displayed on the voltmeter is still above the limit, a malfunction in the generator output wire may exist. Check

the wiring between the generator "B" terminal and the battery (+) terminal (including fusible link). If a terminal is not
sufficiently tight or if the harness has become discolored due to overheating, repair, the test again.

11. After the test, run the engine at idle.

12. Turn off all lights and turn the ignition switch to the OFF position.

13. Disconnect the tachometer or the scan tool.

14. Disconnect the negative battery cable.

15. Disconnect the ammeter and voltmeter.

16. Connect the generator output wire to the generator "B" terminal.

17. Connect the negative battery cable.