Starter Inspection - Lexus 2005 IS300 User Manual

2005 lexus is300

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No Continuity

2005 LEXUS IS300 (RM1140U)

INSPECT ARMATURE COIL

Check the commutator for open circuit.

Using an ohmmeter, check that there is continuity be-

tween the segments of the commutator.

If there is no continuity between any segment, replace the ar-

Check the commutator for ground.

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

tween the commutator and armature coil core.

If there is no continuity, replace the armature.

INSPECT COMMUTATOR

Check the commutator for the dirty and burnt surfaces.

If the surface is dirty or burnt, correct it with sandpaper (No.400)

or on a table.

Check for the commutator circle runout.

Place the commutator on V-blocks.

Using a dial gauge, measure the circle runout.

Maximum circle runout: 0.05 mm (0.0020 in.)

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

Using a vernier caliper, measure the commutator diame-

Standard diameter: 30.0 mm (1.181 in.)

Minimum diameter: 29.0 mm (1.412 in.)

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

Check that the undercut depth is clean and free of foreign

materials. Smooth out the edge.

Standard undercut depth: 0.6 mm (0.024 in.)

Minimum undercut depth: 0.2 mm (0.008 in.)

If the undercut depth is less than minimum, correct it with a

hacksaw blade.

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