Chapter 9 Electrical System
4. Altemator
4LHA Serie
4-12
Troubleshooting
(1) Charging failure
Does
the charge lamp go off
when the key switch is turned
[er engine starting)?
Doesn't
gooff
Defective
Goes
off
Check
fan belt
OK
After stopping the engine, tum on the key switch.
' Measuring condition
Generator
rpms: 5,000
Refer
to page 99.
Remove
R-L generator coupler.
Defective
/ Measure the voltage between BAT
\ terminal, and R-L coupler terminal.
BAT,
R-L terminal
Voltage:
9—12V
OK
Insert
R-L coupler to generator.
Tum on the key switch for engine starting.
' Measure the voltage between
generator
BAT,
and L terminal.
Defective
OK
o
Replace
fan belt,
o Adjust fan belt.
Light the
night
lamp. Measure
the BAT terminal voltage of
generator; 03—2V is nonnal.
o
Check
electrical wiring for defective
continuity of the
BAT,
and R
terminals,
o
Check
the key switch and charge
lamp for defective continuity of the
L-tenminal.
o In
case
of defective continuity of
BAT
terminal, replace IC regulator.
oln
case
of defective continuity of
L-terminal, check or replace diode,
startor, and
rotor.
9-33
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