Onvehicle Inspection

1. CHECK BATTERY SPECIFIC GRAVITY AND ELECTROLYTE LEVEL

(a) Check the electrolyte quantity of each cell. If insufficient, refill with distilled (or purified) water.

(b) Check the specific gravity of each cell. Standard specific gravity:

1.27 - 1.29 at 20°C (68°F) If the specific gravity is less than specification, charge the battery.

Blue o

White

Charging Insufficient Necessary Water

CH0712

HINT:

Check the indicator as shown in illustration. 2. CHECK BATTERY TERMINALS, FUSIBLE LINK AND FUSES

(a) Check that the battery terminals are not loose or corroded.

If the terminals are corroded, clean the terminals.

(b) Check the fusible link and fuses for continuity.

Fusible link

MAIN 2.0A

H-fuse

ALT 100A

AM1 50A

Fuse

AM2 15A

GAUGE 15A

IGN 7.5A

ALT-S 7.5A

3. INSPECT DRIVE BELT

(a) Visually check the drive belt for excessive wear, frayed cords etc.

If any defect is found, replace the drive belt. HINT:

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

¿MM*

S*

CORRECT

WRONG

WRONG

CH0087

(b) Using a belt tension gauge, check the drive belt tension. Belt tension gauge: DENSO BTG-20 (95506-00020) Borroughs No. BT-33-73F Drive belt tension:

New belt

160 ± 20 Ibf

Used belt

100 ± 20 Ibf

If the belt tension is not as specified, adjust it.

HINT:

• "New belt" refers to a belt which has been used less than 5 minutes on a running engine.

• "Used belt" refers to a belt which has been used on a running engine for 5 minutes or more.

• After installing a belt, check that it fits properly in the ribbed grooved.

• Check by hand to confirm that the belt has not slipped out of the groove on the bottom of the pulley.

• After installing a new belt, run the engine for about 5 minutes and recheck the belt tension.

4. VISUALLY CHECK GENERATOR WIRING AND LISTEN FOR ABNORMAL NOISES

(a) Check that the wiring is in good condition.

(b) Check that there is no abnormal noise from the generator while the engine is running.

5. INSPECT CHARGE WARNING LIGHT CIRCUIT

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

(b) Turn off all accessories.

(c) Turn the ignition switch "ON". Check that the charge warning light is lit.

(d) Start the engine. Check that the light goes off.

If the light does not go off as specified, troubleshoot the charge light circuit.

6. 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.

(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:

at 25°C (77 °F)

13.9 - 15.1 V

at 115°C (239° F)

13.5 - 14.3 V

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

If the voltmeter reading is less than standard voltage, check the voltage regulator and generator as follows:

• With terminal F grounded, start the engine and check the voltmeter reading of terminal B.

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

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

7. INSPECT CHARGING CIRCUIT WITH LOAD

(a) With the engine running at 2,000 rpm, turn on the high beam headlights and place the heater blower switch at "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. HINT:

If the battery is fully charged, the indication will sometimes be less than standard amperage.

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

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