G424F(FE) Service Manual Chapter 4. Engine Electrical System 108
Alternators
The alternators used on these engines have three
phase, full-wave, rectified output. They are the brush
type. Refer to the Alternator Coverage chart for
detailed systems operation information
ALTERNATOR COVERAGE
Alternator Manufacturer/
Part Number Series
D167411 Korea-Delphi CS121D
D187478 MICO/K1 Sealed
Troubleshooting
Charging system defect is almost caused by lack of
pan belt tension and faulty function of wiring,
connector, and voltage regulator.
One of most important thing during troubleshooting
of charging system is determining the reason
between overcharging and lack of charging. So,
prior to inspection of alternator, check the battery for
charging. Faulty alternator causes the following
symptoms.
1. Faulty battery charging
1) IC regulator fault (Short circuit)
2) Field coil fault
3) Main diode fault
4) Stator coil fault
5) Brush contact fault
2. Overcharging : IC regulator fault(Short circuit)
Other faults such as voltage adjusting problem
except above symptoms rarely happen.
D187478
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