Inspection And Repair Of Alternator - Toyota 3b Repair Manual

cH-12
CHARGING SYSTEM
-
Alternator
INSPECTION
AND REPAIR OF ALTERNATOR
Rotor
1.
INSPECT ROTOR FOR OPEN CIRCUIT
Using an ohmmeter, check that there is
continuity between
the slip rings.
Standard resistance
(cold):
2.8
-
3.O O
lf there is no continuity, replace the rotor.
2.
INSPECT ROTOR FOR GROUND
Using
an ohmmeter, check
that there
is
no
continuity
between the slip ring and the rotor.
lf there
is
continuity, replace the rotor.
3.
INSPECT SLIP RINGS
(a)
Check
that the slip rings are not rough or scored'
lf rough or scored, replace the rotor'
(b)
Using calipers, measure the slip ring diameters.
Standard
diameter: 14'4
mm (0'567 in')
Minimum
diameter:
12.8 mm
(O.5O4 in.)
lf the diameter is less
than minimum,
replace the rotor'
Stator
1.
INSPECT STATOR FOR OPEN CIRCUIT
Using an ohmmeter, check that there is
continuity between
the coil
leads.
lf
there
is
no
assembly.
replace
the
drive end
frame
INSPECT STATOR FOR GROUND
Using
an
ohmmeter, check
that there
is
no
between the coil leads
and drive end frame.
2.
No
continuity
\
cHo27o
No
continuity
."o,".,
lf there
is
continuity, replace the drive end frame
assembly'