Check Charge Warning Light Circuit

a. Warm up the engine and then turn it off.

b. Switch off all accessories.

c. Turn the ignition switch ON, and check that the charge warning light comes on.

d. Start the engine, and check that the light goes off.

If the light does not go off as specified, troubleshoot the charge light circuit. 10. INSPECT CHARGING CIRCUIT WITHOUT LOAD

HINT:

If a battery/generator tester is available, connect the tester to the charging circuit as per manufacturer's instructions.

a. If a tester is not available, connect a voltmeter and ammeter to the charging circuit as follows:

• Disconnect the wire from terminal B of the generator, and connect it to the negative (-) tester probe of the ammeter.

• Connect the positive (+) tester probe of the ammeter to terminal B of the generator.

• Connect the positive (+) tester probe of the voltmeter to terminal B of the generator.

• Ground the negative (-) tester probe of the voltmeter.

2007 ELECTRICAL Charging - Sequoia

Fig. 6: Inspecting Charging Circuit Without Load Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b. Check the charging circuit as follows: With the engine running from idling to 2,000 rpm, check the reading on the ammeter and voltmeter.

Standard amperage: 10 A or less

Standard voltage: 13.2 to 14.0 V

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

If the voltmeter reading is less than the standard voltage, check the voltage regulator and generator.

11. INSPECT CHARGING CIRCUIT WITH LOAD

a. With the engine running at 2,000 rpm, turn on the high beam headlights and set the heater blower switch to HI.

b. Check the reading on the ammeter.

Standard amperage: 30 A or more

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

2007 ELECTRICAL Charging - Sequoia

HINT:

If the battery is fully charged, the indication will sometimes be less than standard amperage. 12. REINSTALL ENGINE UNDER COVER NO.1

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

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