Toyota Supra 1990 Manual page 365

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No continuity

STARTING SYSTEM - Starter

INSPECTION OF STARTER

Armature Coil

INSPECT THAT COMMUTATOR IS NOT GROUNDED

Using an ohmmeter, check that there is no continuity be-

tween the commutator and armature coil core.

If there is continuity, replace the armature.

INSPECT COMMUTATOR FOR OPEN CIRCUIT

Using an ohmmeter, check that there is continuity between

the segments of the commutator.

If there is no continuity between any segment, replace the

INSPECT COMMUTATOR FOR DIRTY AND BURNT

If the surface is dirty or burnt, correct it with sandpaper

(No.400) or on a lathe.

INSPECT COMMUTATOR CIRCLE RUNOUT

Place the commutator on V-blocks.

Using a dial indicator, measure the circle runout.

Maximum circle runout:

0.05 mm (0.0020 in.'

If the circle runout is greater than maximum, correct it on

INSPECT COMMUTATOR DIAMETER

Using vernier calipers, measure the commutator diameter.

Standard diameter:

30 mm (1.18 in.'

Minimum diameter:

29 mm (1.14 in.'

If the diameter is less than minimum, replace the armature.

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