Toyota Tundra. Manual — part 2377

1

Disconnect the field coil wire from terminal C

2

Connect the battery to the magnetic switch as shown in the illustration Check that the clutch
pinion gear moves outward

If the clutch pinion gear does not move outward, replace the starter magnetic switch
assembly

Fig. 28: Inspecting Starter Assembly (Pull-In Test)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b

Perform holding test

1

Disconnect the negative (-) terminal lead from terminal C with the condition specified in the
pull-in test above being maintained Check that the pinion gear remains out

If the clutch pinion gear moves inward, replace the starter magnetic switch assembly

Fig. 29: Inspecting Starter Assembly (Performing Holding Test)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

c

Inspect clutch pinion gear return

1

Disconnect the negative (-) lead from the starter body Check that the clutch pinion gear
moves inward

If the clutch pinion gear does not move inward, replace the starter magnetic switch assembly

2009 Toyota Tundra

2009 ENGINE Starting (3UR-FE) - Tundra

Fig. 30: Inspecting Clutch Pinion Gear Return
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

d

Perform the operation test without load

1

Connect the field coil wire to terminal C with the nut Make sure that the lead is not
grounded

Torque: 6.5 N*m (66 kgf*cm, 57 in.*lbf)

2

Clamp the starter in a vise

3

Connect the battery and an ammeter to the starter as shown in the illustration

4

Check that the starter rotates smoothly and steadily while the pinion gear is moving out Then
measure the current

Standard current:

190 A or less at 11.5 V

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

Fig. 31: Performing Operation Test Without Load
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2

INSPECT STARTER ARMATURE ASSEMBLY

a

Inspect the commutator for an open circuit

1

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

2009 Toyota Tundra

2009 ENGINE Starting (3UR-FE) - Tundra

Standard resistance

OMMUTATOR FOR AN OPEN CIRCUIT

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

Fig. 32: 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

COMMUTATOR FOR A SHORT CIRCUIT

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

Fig. 33: Inspecting Commutator For Short Circuit
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

c

Check the surface of the commutator for dirt and burns

Tester Connection Condition Specified Condition

Commutator

Always

Below 1 ohms

Tester Connection

Condition Specified Condition

Commutator - Armature coil core Always

10 kohms or higher

2009 Toyota Tundra

2009 ENGINE Starting (3UR-FE) - Tundra

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

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

Fig. 34: Measuring Commutator Diameter
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

e

Using a dial indicator, measure the commutator runout

Maximum commutator runout:

0.05 mm (0.00197 in.)

If the commutator's runout is greater than the maximum, correct it using a lathe

2009 Toyota Tundra

2009 ENGINE Starting (3UR-FE) - Tundra