Charging System On-Vehicle Inspection

Check the battery for damage and deformation. If severe damage, deformation or leakage is found, replace the battery.

Check the electrolyte quantity of each cell.
For maintenance-free batteries:

1. If the electrolyte quantity is below the lower line, replace the battery.
   

1. If the electrolyte quantity is above the lower line, check the battery voltage when cranking the engine. If the voltage is less than 9.6 V, recharge or replace the battery.
   

HINT:

Before checking the battery voltage, turn off all the electrical systems (headlight, blower motor, rear defogger, etc.).

Standard specific gravity:

1.25 to 1.29 at 20°C (68°F)

1. If the electrolyte quantity is above the lower line, check the battery voltage when cranking the engine. If the voltage is less than 9.6 V, recharge or replace the battery.
   

HINT:

Before checking the battery voltage, turn off all the electrical systems (headlight, blower motor, rear defogger, etc.).

Check that the battery terminals are not loose or corroded.

1. If the terminals are corroded, clean the terminals.
   

Measure the resistance of the H-fuses and fuses.

Standard resistance:

Below 1 Ω

1. If the results are not as specified, replace the fuses as necessary.
   

Check the belt for wear, cracks or other signs of damage.
If any of the following defects is found, replace the V-ribbed belt.

1. The belt is cracked.
   

1. The belt is worn out to the extent that the cords are exposed.
   

1. The belt has chunks missing from the ribs.
   

Check that the belt fits properly in the ribbed grooves.

HINT:

Check with your hand to confirm that the belt has not slipped out of the grooves on the bottom to the pulley. If it has slipped out, replace the V-ribbed belt. Install a new V-ribbed belt correctly.

Check that the wiring is in good condition.

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

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

Start the engine and check that the light turns off.

1. If the light does not operate as specified, troubleshoot the charge warning light circuit.
   

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

HINT:

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

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

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

3. Connect the voltmeter's positive (+) lead to the positive (+) battery terminal.
   

4. Ground the voltmeter's negative (-) lead.
   

Check the charging circuit.

1. Maintain the engine speed at 2,000 rpm. Check the reading on the ammeter and voltmeter.
   

   Standard amperage:

   10 A or less
   

   Standard voltage:

   13.2 to 14.8 V
   

   1. If the result is not as specified, replace the generator.
      

   HINT:

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

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

Check the reading on the ammeter.

Standard amperage:

30 A or more

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

HINT:

If the battery is fully charged, the ammeter reading may 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.