Toyota Tundra. Manual — part 1095

2. REMOVE GENERATOR REAR END COVER

a. Place the generator on the pulley.

b. Remove the 3 nuts and end cover.

Fig. 16: Identifying Generator Rear End Cover Nuts
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

c. Remove the terminal insulator.

Fig. 17: Identifying Terminal Insulator
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

3. REMOVE GENERATOR BRUSH HOLDER ASSEMBLY

a. Remove the 2 screws and brush holder.

Fig. 18: Identifying Screws And Brush Holder
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2009 Toyota Tundra

2009 ELECTRICAL Charging (3UR-FE) - Tundra

4. REMOVE GENERATOR COIL ASSEMBLY

a. Remove the 4 bolts.

Fig. 19: Identifying Generator Coil Assembly Bolts
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b. Using SST, remove the coil assembly.

Fig. 20: Identifying Coil Assembly & SST
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

SST 09950-40011 (09951-04020,09952-04010, 09953-04020, 09954-04010, 09955-04071, 09957-
04010, 09958-04011)

c. Remove the generator washer.

5. REMOVE GENERATOR ROTOR ASSEMBLY

INSPECTION

1. INSPECT GENERATOR ROTOR ASSEMBLY

a. Check the rotor for an open circuit.

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

Standard resistance 100 A Type and 130 A Type

GENERATOR ROTOR ASSEMBLY TESTER CONNECTION SPECIFIED
CONDITION CHART

2009 Toyota Tundra

2009 ELECTRICAL Charging (3UR-FE) - Tundra

Fig. 21: Identifying Resistance Between Slip Rings
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

150 A Type

GENERATOR ROTOR ASSEMBLY TESTER CONNECTION SPECIFIED
CONDITION CHART

If the result is not as specified, replace the rotor assembly.

b. Check if the rotor is grounded.

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

Standard resistance

GENERATOR ROTOR ASSEMBLY TESTER CONNECTION SPECIFIED
CONDITION CHART

Fig. 22: Identifying Resistance Between Slip Ring & Rotor
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Tester Connection Condition Specified Condition

Slip ring - Slip ring 20°C (68°F)

2.3 to 2.7 ohms

Tester Connection Condition Specified Condition

Slip ring - Slip ring 20°C (68°F)

1.5 to 1.9 ohms

Tester Connection Condition Specified Condition

Slip ring - Rotor

Always

10 kohms or higher

2009 Toyota Tundra

2009 ELECTRICAL Charging (3UR-FE) - Tundra

If the result is not as specified, replace the rotor assembly.

c. Check that the slip rings are not rough or scored. If rough or scored, replace the rotor assembly.

d. Using a vernier caliper, measure the slip ring diameter.

Standard diameter: 14.2 to 14.4 mm (0.559 to 0.567 in.)

Minimum diameter: 14.0 mm (0.551 in.)

If the diameter is less than the minimum, replace the rotor assembly.

Fig. 23: Measuring Slip Ring Diameter
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2. INSPECT GENERATOR BRUSH HOLDER ASSEMBLY

a. Using a vernier caliper, measure the exposed brush length.

Standard exposed length: 10.5 mm (0.413 in.)

Minimum exposed length: 4.5 mm (0.177 in.)

If the exposed length is less than the minimum, replace the brush holder assembly.

Fig. 24: Measuring Exposed Brush Length
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

3. INSPECT GENERATOR DRIVE END FRAME BEARING

a. When rotating the bearing, check that there is no abnormal noise and that it rotates smoothly. If

2009 Toyota Tundra

2009 ELECTRICAL Charging (3UR-FE) - Tundra