Toyota 3S-GE Repair Manual page 483

CHARGING SYSTEM — ALTERNATOR °H'19
SW20 _ (d) sw20;
Remove the alternator washer from the rotor.
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"6896 212277
7. REMOVE ROTOR FROM DRIVE END FRAME
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ALTERNATOR INSPECTION AND REPAIR"
Rotor
IE 1. INSPECT ROTOR FOR OPEN CIRCUIT
Ohmmete, Using an ohmmeter, check that there is continuity
{.0 between the slip rings.
' Standard resistance:
Ommmy 2.8 — 3.0 Q at 20°C (68° F)
CH0," If there is no continuity, replace the rotor.
@ '6
EFI ' ? !
2. INSPECT ROTOR FOR GROUND
Using an ohmmeter, check that there is no continuity
— between the slip ring and rotor.
If there is continuity, replace the rotor.
Ohmmeter
\<
ntinuity
C H0783
3. INSPECT SLIP RINGS
'Q (a) Check that the slip rings are not rough or scored.
Ii X If rough or scored, replace the rotor.
(b) Using a vernier caliper, measure the slip ring diameter.
J I
J .1 Standard diameter:
S. />7"-/P 14.2 - 14.4 mm (0.559 — 0.561 in.)
' Y (' Minimum diameter:
"SW6
4 12.8 mm (0.504 in.)
W23 If the diameter is less than minimum, replace the rotor.