Hyundai Creta: Charging System / Repair procedures
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First of all, check for DTCs. If a DTC is present, perform troubleshooting
in accordance with the procedure for that DTC. (Refer to DTC
guide)
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Check that the battery cables are connected to the correct terminals.
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| • |
Disconnect the battery cables when the battery is given a quick
charge.
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Never disconnect the battery while the engine is running.
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[General Inspection]
| 1. |
Check The Battery Terminals And Fuses
| (1) |
Check that the battery terminals are not loose or corroded.
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| (2) |
Check the fuses for continuity.
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| 2. |
Inspect Drive Belt
| (1) |
Visually check the belt for excessive wear, frayed cords etc.
If any defect has been found, replace the drive belt.
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• |
Cracks on the rib side of a belt are considered
acceptable. If the belt has chunks missing from
the ribs, it should be replaced.
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| 3. |
Drive belt tension measurement and adjustment.
(Refer to Engine Mechanical System - "Drive Belt")
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| 4. |
Visually Check Alternator Wiring And Listen For Abnormal Noises
| (1) |
Check that the wiring is in good condition.
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| (2) |
Check that there is no abnormal noise from the alternator while
the engine is running.
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| 5. |
Check Discharge Warning Light Circuit
| (1) |
Warm up the engine and then turn it off.
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| (2) |
Turn off all accessories.
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| (3) |
Turn the ignition switch "ON". Check that the discharge warning
light is lit.
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| (4) |
Start the engine. Check that the light is lit.
If the light does not go off as specified, troubleshoot the
discharge light circuit.
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[Electrical Specified Value Inspection]
| 1. |
Voltage Drop Test Of Alternator Output Wire
This test determines whether or not the wiring between the alternator
"B" terminal and the battery (+) terminal is good by the voltage drop
method.
| (1) |
Preparation
| a. |
Turn the ignition switch to "OFF".
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| b. |
Disconnect the output wire from the alternator "B" terminal.
Connect the (+) lead wire of ammeter to the "B" terminal
of alternator and the (-) lead wire of ammeter to the
output wire. Connect the (+) lead wire of voltmeter
to the "B" terminal of alternator and the (-) lead wire
of voltmeter to the (+) terminal of battery.
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| (2) |
Test
| b. |
Turn on the headlamps and blower motor, and set the
engine speed until the ammeter indicates 20A.
And then, read the voltmeter at this time.
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| (3) |
Result
| a. |
The voltmeter may indicate the standard value.
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Standard value : 0.2V max
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| b. |
If the value of the voltmeter is higher than expected
(above 0.2V max.), poor wiring is suspected. In this
case check th e wiring from the alternator "B" terminal
to the battery (+) terminal. Check for loose connections,
color change due to an over-heated harness, etc. Correct
them before testing again.
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| c. |
Upon completion of the test, set the engine speed at
idle.
Turn off the headlamps, blower motor and the ignition
switch.
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| 2. |
Output Current Test
This test determines whether or not the alternator gives an output current
that is equivalent to the normal output.
| (1) |
Preparation
| a. |
Prior to the test, check the following items and correct
as necessary.
Check the battery installed in the vehicle to ensure
that it is good condition. The battery checking method
is described in the section "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 alternator drive belt. The
belt tension check method is described in the section
"Inspect drive belt".
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| b. |
Turn off the ignition switch.
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| c. |
Disconnect the battery ground cable.
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| d. |
Disconnect the alternator output wire from the alternator
"B" terminal.
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| e. |
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.
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• |
Tighten each connection securely, as
a heavy current will flow. Do not rely
on clips.
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| f. |
Connect a voltmeter (0 to 20V) between the "B" terminal
and ground. Connect the (+) lead wire to the alternator
"B" terminal and (-) lead wire to a good ground.
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| g. |
Attach an engine tachometer and connect the battery
ground cable.
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| h. |
Leave the engine hood open.
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| (2) |
Test
| a. |
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 alternator "B"
terminal and battery (+) terminal or poor grounding
is suspected.
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| b. |
Start the engine and turn on the headlamps.
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| c. |
Set the headlamps 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.
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• |
After the engine start up, the charging
current quickly drops. Therefore, the
above operation must be done quickly
to read the maximum current value correctly.
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| (3) |
Result
| a. |
The ammeter reading must be higher than the limit value.
If it is lower but the alternator output wire is in
good condition, remove the alternator from the vehicle
and test it.
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Limit value : 60% of the voltage rate
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• |
The nominal output current value is
shown on the nameplate affixed to the
alternator body.
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The output current value changes with
the electrical load and the temperature
of the alternator itself.
Therefore, the nominal output current
may not be obtained. If such is the
case, keep the headlamps on the cause
discharge of the battery, or use the
lights of another vehicle to increase
the electrical load.
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• |
The nominal output current may not be
obtained if the temperature of the alternator
itself or ambient temperature is too
high. In such a case, reduce the temperature
before testing again.
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| b. |
Upon completion of the output current test, lower the
engine speed to idle and turn off the ignition switch.
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| c. |
Disconnect the battery ground cable.
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| d. |
Remove the ammeter and voltmeter and the engine tachometer.
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| e. |
Connect the alternator output wire to the alternator
"B" terminal.
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| f. |
Connect the battery ground cable.
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| 3. |
Regulated Voltage Test
The purpose of this test is to check that the electronic voltage regulator
controls voltage correctly.
| (1) |
Preparation
| a. |
Prior to the test, check the following items and correct
if necessary.
Check that the battery installed on the vehicle is fully
charged. The battery checking method is described in
the section "Battery".
Check the alternator drive belt tension. The belt tension
check method is described in the section "Inspect drive
belt".
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| b. |
Turn ignition switch to "OFF".
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| c. |
Disconnect the battery ground cable.
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| d. |
Connect a digital voltmeter between the "B" terminal
of the alternator and ground. Connect the (+) lead of
the voltmeter to the "B" terminal of the alternator.
Connect the (-) lead to good ground or the battery (-)
terminal.
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| e. |
Disconnect the alternator output wire from the alternator
"B" terminal.
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| f. |
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.
|
| g. |
Attach the engine tachometer and connect the battery
ground cable.
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| (2) |
Test
| a. |
Turn on the ignition switch and check to see that the
voltmeter indicates the following value.
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Voltage : Battery voltage
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If it reads 0V, there is an open circuit in the wire
between the alternator "B" terminal and the battery
and the battery (-) terminal.
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| b. |
Start the engine. Keep all lights and accessories off.
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| c. |
Run the engine at a speed of about 2,500 rpm and read
the voltmeter when the alternator output current drops
to 10A or less
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| (3) |
Result
| a. |
If the voltmeter reading dosen't agree with the standard
value, the voltage regulator or the alternator is faulty.
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| b. |
Upon completion of the test, reduce the engine speed
to idle, and turn off the ignition switch.
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| c. |
Disconnect the battery ground cable.
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| d. |
Remove the voltmeter and ammeter and the engine tachometer.
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| e. |
Connect the alternator output wire to the alternator
"B" terminal.
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| f. |
Connect the battery ground cable.
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Description
The charging system included a battery, an alternator with a built-in regulator,
and the charging indicator light and wire.
The Alternator has eight built-in diodes, ...
Description and operation
Description
The Alternator has eight built-in diodes, each rectifying AC current to DC current.
Therefore, DC current appears at alternator "B" ...
Description and operation
Alternator