Toyota Tundra. Manual — part 2378

Fig. 35: Measuring Commutator Runout
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

f

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

3

INSPECT BRUSH

a

Using a vernier caliper, measure the brush length

Standard length:

15.0 mm (0.591 in.)

Minimum length:

9.0 mm (0.354 in.)

2009 Toyota Tundra

2009 ENGINE Starting (3UR-FE) - Tundra

If the brush length is less than the minimum, replace the brush holder and yoke assembly

Fig. 37: Measuring Brush Length
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

4

INSPECT STARTER BRUSH HOLDER ASSEMBLY

a

Inspect the insulation

1

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

Standard resistance

STARTER BRUSH HOLDER ASSEMBLY

If the result is not as specified, replace the brush holder assembly

Fig. 38: Inspecting Starter Brush Holder Assembly
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b

Inspect the load of the brush spring

1

Take the pull scale reading immediately after the brush spring separates from the brush

Standard spring installed load:

22 to 28 N (2 to 3 kgf, 4.8 to 6.2 lbf)

Tester Connection

Condition Specified Condition

Positive (+) brush holder - Negative (-) brush holder Always

10 kohms or higher

2009 Toyota Tundra

2009 ENGINE Starting (3UR-FE) - Tundra

Minimum spring installed load:

13 N (1 kgf, 2.9 lbf)

If the installed load is less than the minimum, replace the starter brush holder assembly

Fig. 39: Inspecting Load Of Brush Spring
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

5

INSPECT STARTER YOKE ASSEMBLY

a

Inspect the resistance of the field coil

1

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

Standard resistance

FIELD COIL RESISTANCE

If the result is not as specified, repair or replace the yoke assembly

Fig. 40: Inspecting Resistance Of Field Coil
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2

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

Tester Connection

Condition Specified Condition

Lead wire - Field coil brush lead Always

Below 1 ohms

2009 Toyota Tundra

2009 ENGINE Starting (3UR-FE) - Tundra

Standard resistance

FIELD COIL END - FIELD FRAME RESISTANCE

If the result is not as specified, repair or replace the yoke assembly

Fig. 41: Inspecting Resistance Of Field Coil
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

6

INSPECT STARTER CENTER BEARING CLUTCH SUB-ASSEMBLY

a

Check the gear teeth of the planetary gear and starter center bearing clutch for wear or damage If
any planetary gear is damaged, replace the planetary gear assembly If any gear of the starter center
bearing clutch is damaged, replace the starter center bearing clutch sub-assembly

b

Check the movement of the clutch pinion gear

1

Rotate the clutch pinion gear clockwise, and check that it turns freely

2

Try to rotate the clutch pinion gear counterclockwise, and check that it locks If the clutch
pinion gear cannot be turned clockwise smoothly, or does not lock in the counterclockwise
direction, replace the starter center bearing clutch sub-assembly

Fig. 42: Checking Movement Of Clutch Pinion Gear
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

7

INSPECT MAGNET STARTER SWITCH ASSEMBLY

a

Inspect the pull-in coil

1

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

Tester Connection

Condition Specified Condition

Field coil end - Field frame Always

10 kohms or higher

2009 Toyota Tundra

2009 ENGINE Starting (3UR-FE) - Tundra