Toyota Tundra 2005 Service - Repair - Maintenance page 2152

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Table of Contents

No Continuity

STARTING (1GR−FE)

Using an ohmmeter, check that there is continuity between the

segments of the commutator.

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

If there is continuity, replace the armature.

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

or on a lathe.

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

Using vernier calipers, measure the commutator diameter.

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

Check that the undercut depth is clean and free of foreign mate-

rials. Smooth out the edge.

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

hacksaw blade.

STARTER (2.0 kW)

INSPECT COMMUTATOR FOR OPEN CIRCUIT

INSPECT COMMUTATOR FOR GROUND

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

tween the commutator and armature coil core.

Check that the commutator for dirty and burm on surface.

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.)

INSPECT COMMUTATOR DIAMETER

Standard diameter: 35.0 mm (1.378 in.)

Minimum diameter: 34.0 mm (1.339 in.)

INSPECT UNDERCUT DEPTH

Standard undercut depth: 0.7 mm (0.028 in.)

Minimum undercut depth: 0.2 mm (0.008 in.)