Kia Optima: Repair procedures
On-vehicle Inspection
•
|
Check that the battery cables are connected
to the correct terminals. |
•
|
Disconnect the battery cables when the battery
is given a quick charge. |
•
|
Never disconnect the battery while the engine
is running. |
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Check The Battery Terminals And Fuses
1. |
Check that the battery terminals are not loose or
corroded. |
2. |
Check the fuses for continuity. |
Inspect Drive Belt
Visually check the belt for excessive wear, frayed cords
etc.
If any defect has been found, replace the drive belt.
Cracks on the rib side of a belt are considered acceptable.
If the belt has chunks missing from the ribs, it should be replaced. |
Visually Check Alternator Wiring And Listen For Abnormal Noises
1. |
Check that the wiring is in good condition. |
2. |
Check that there is no abnormal noise from the alternator
while the engine is running. |
Check Discharge Warning Light Circuit
1. |
Warm up the engine and then turn it off. |
2. |
Turn off all accessories. |
3. |
Turn the ignition switch "ON". Check that the discharge
warning light is lit. |
4. |
Start the engine and Check that the light goes off. If the light does not go off as specified, troubleshoot
the discharge light circuit. |
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.
Preparation
1. |
Turn the ignition switch to "OFF". |
2. |
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.
|
Test
2. |
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. |
Result
1. |
The voltmeter may indicate the standard value.
|
2. |
If the value of the voltmeter is higher than expected
(above 0.2V max.), poor wiring is suspected. In this case check the
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. |
3. |
Upon completion of the test, set the engine speed
at idle. Turn off the headlamps, blower motor and the ignition
switch. |
Output Current Test
This test determines whether or not the alternator gives
an output current that is equivalent to the normal output.
Preparation
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 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.Check the tension of the alternator drive belt. The
belt tension check method is described in the section "Inspect drive
belt". |
2. |
Turn off the ignition switch. |
3. |
Disconnect the battery ground cable. |
4. |
Disconnect the alternator output wire from the alternator
"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 alternator "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.
|
Test
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 alternator "B" terminal and battery (+)
terminal or poor grounding is suspected. |
2. |
Start the engine and turn on the headlamps. |
3. |
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.
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. |
|
Result
1. |
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.
Limit value :
60% of the voltage rate
|
• |
The output current value changes
with the electrical load and the temperature of the
alternator itself. Due to temperature the maximum output
current may not be obtained. If such is the case, keep
the headlamps on to increase the electrical load.
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. |
|
|
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 alternator output wire to the alternator
"B" terminal. |
6. |
Connect the battery ground cable. |
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. 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". |
2. |
Turn ignition switch to "OFF". |
3. |
Disconnect the battery ground cable. |
4. |
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. |
5. |
Disconnect the alternator output wire from the alternator
"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.
|
Test
1. |
Turn on the ignition switch and check to see that
the voltmeter indicates the following value.
If it reads 0V, there is an open circuit in the wire
between the alternator "B" terminal and the battery and the battery
(-) terminal. |
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 alternator output current drops to 10A or
less |
Result
1. |
If the voltmeter reading dosen't agree with the standard
value, the voltage requlator or the alternator is faulty. |
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 alternator output wire to the alternator
"B" terminal. |
6. |
Connect the battery ground cable. |
Regulating Voltage Table (Internal mode)
Voltage regulator ambient temperature
°C (°F)
|
Regulating voltage (V)
|
-30 (-22)
25 (77)
130 (266)
|
14.1 ~ 15.0
14.0 ~ 14.7
13.5 ~ 14.6
|
Regulating Voltage Table (External mode)
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