Toyota Tundra. Manual — part 2353

Fig. 59: Inspecting Commutator For Open Circuit
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b

Inspect the commutator for a short circuit

1

Measure the resistance according to the value(s) in the table below

Standard resistance

STARTER ARMATURE ASSEMBLY (SHORT CIRCUIT)

If the result is not as specified, replace the armature assembly

Fig. 60: Inspecting Commutator For Short Circuit
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Tester Connection

Condition Specified Condition

Commutator - Armature core Always

10 kohms or higher

2009 Toyota Tundra

2009 ENG NE Starting (2UZ-FE) - Tundra

c

Inspect the commutator circle runout

1

Place the commutator on V-blocks

2

Using a dial indicator, measure the circle runout

Maximum circle runout:

0.05 mm (0.00197 in.)

If the runout is greater than the maximum, correct it with sandpaper (#400) or replace the
armature assembly

Fig. 61: Inspecting Commutator Circle Runout
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

d

Using a vernier caliper, measure the commutator diameter

Standard diameter:

35.0 mm (1.38 in.)

Minimum diameter:

34.0 mm (1.34 in.)

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

2009 Toyota Tundra

2009 ENG NE Starting (2UZ-FE) - Tundra

Fig. 62: Measuring Commutator Diameter
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

e

Measure the undercut depth of the commutator

Standard undercut depth:

0.7 mm (0.0276 in.)

Minimum undercut depth:

0.2 mm (0.00787 in.)

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

Fig. 63: Measuring Undercut Depth Of Commutator
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

3

INSPECT STARTER YOKE ASSEMBLY

a

Inspect for an open circuit

1

Measure the resistance according to the value(s) in the table below

Standard resistance

STARTER YOKE ASSEMBLY (OPEN CIRCUIT)

If the result is not as specified, replace the starter yoke assembly

Tester Connection

Condition Specified Condition

Terminal C wire - Brushes Always

Below 1 ohms

2009 Toyota Tundra

2009 ENG NE Starting (2UZ-FE) - Tundra

Fig. 64: Inspecting Open Circuit
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b

Inspect the shunt coil for an open circuit

1

Measure the resistance according to the value(s) in the table below

Standard resistance

STARTER YOKE ASSEMBLY (SHUNT FOR OPEN CIRCUIT)

If the result is not as specified, replace the starter yoke assembly

Fig. 65: Inspecting Shunt Coil For Open Circuit
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Tester Connection

Condition Specified Condition

Terminal (A) - Terminal (B) 20°C (68°F)

1 5 to 1 9 ohms

2009 Toyota Tundra

2009 ENG NE Starting (2UZ-FE) - Tundra