Toyota Tundra 2005 Service - Repair - Maintenance page 2169

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Table of Contents

No Continuity

STARTING (2UZ−FE)

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 ar-

INSPECT COMMUTATOR FOR GROUND

Using an ohmmeter, check that there is no continuity between

the commutator and armature coil core.

If there is continuity, replace the armature.

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 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.

INSPECT COMMUTATOR DIAMETER

Using vernier calipers, measure the commutator diameter.

Standard diameter:

Minimum diameter:

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

INSPECT UNDERCUT DEPTH

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

rials. Smooth out the edge.

Standard undercut depth:

Minimum undercut depth: 0.2 mm (0.008 in.)

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

hacksaw blade.

30.0 mm (1.181 in.)

35.0 mm (1.378 in.)

29.0 mm (1.142 in.)

34.0 mm (1.339 in.)

0.6 mm (0.024 in.)

0.7 mm (0.028 in.)