Toyota Tundra. Manual — part 1093

HINT:

Cracks on the rib side of the belt are considered acceptable. If the belt has chunks missing from the
ribs, it should be replaced.

Fig. 5: Checking V-Ribbed Belt
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b. Check that the belt fits properly in the ribbed grooves.

HINT:

Fig. 6: Checking Belt Fits Properly In Ribbed Grooves
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Confirm by hand that the belt has not slipped out of the grooves on the bottom of the pulley.

4. INSPECT GENERATOR WIRING

a. Visually check the generator wiring.

1. Check that the wiring is in good condition.

5. CHECK FOR ABNORMAL NOISES

a. Listen for abnormal noises from the generator.

1. Check that no abnormal noises are heard from the generator while the engine is running.

6. INSPECT CHARGE WARNING LIGHT CIRCUIT

a. Turn the ignition switch ON. Check that the charge warning light comes on.

b. Start the engine and check that the light goes off. If the light does not operate as specified,

troubleshoot the charge warning light circuit.

2009 Toyota Tundra

2009 ELECTRICAL Charging (3UR-FE) - Tundra

7. INSPECT CHARGING CIRCUIT WITHOUT LOAD

a. Connect a voltmeter and ammeter to the charging circuit as follows.

1. Disconnect the wire from terminal B of the generator, then connect it to the negative (-) lead

of an ammeter.

2. Connect the positive (+) lead of the ammeter to terminal B of the generator.

3. Connect the positive (+) lead of a voltmeter to the positive (+) terminal of the battery.

4. Ground the negative (-) lead of the voltmeter.

b. Check the charging circuit.

1. Keep the engine speed at 2000 rpm and check the reading on the ammeter and voltmeter.

Standard current: 10 A or less

Standard voltage: 13.2 to 14.8 V

Fig. 7: Identifying Charging Circuit Without Load
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

If the voltmeter reading is more than the standard voltage, replace the voltage regulator.

HINT:

If the battery is not fully charged, the ammeter reading will sometimes be more than the
standard amperage.

8. INSPECT CHARGING CIRCUIT WITH LOAD

a. With the engine running at 2000 rpm, turn the high beam headlights ON and turn the heater blower

switch to the "HI" position.

b. Check the reading on the ammeter.

Standard current: 30 A or higher

2009 Toyota Tundra

2009 ELECTRICAL Charging (3UR-FE) - Tundra

If the ammeter reading is less than the standard amperage, repair the generator.

HINT:

If the battery is fully charged, the indication will sometimes be less than the standard amperage. If
this is the case, add more electrical load (operate the wipers, rear window defogger, etc.) and check
the reading on the ammeter again.

GENERATOR

COMPONENTS

2009 Toyota Tundra

2009 ELECTRICAL Charging (3UR-FE) - Tundra

Fig. 8: Identifying Generator Components And Torque Specifications (1 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2009 Toyota Tundra

2009 ELECTRICAL Charging (3UR-FE) - Tundra