CHARGING SYSTEM ON-VEHICLE INSPECTION

PROCEDURE


  1. CHECK BATTERY CONDITION

    Note

    If the battery is weak or if the engine is difficult to start, perform the following procedures.


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

    2. Check the volume of electrolyte quantity in each cell.


      1. For batteries that are maintenance-free:


        • If the electrolyte volume is below the lower line, replace the battery.

        • If the electrolyte volume 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.

          Tech Tips

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

      2. A005H2N

        For batteries that are not maintenance-free:


        • If the electrolyte volume is below the lower line, add distilled water to each cell. Then, recharge the battery and check the electrolyte specific gravity.

          Standard specific gravity
          1.25 to 1.29 at 20°C (68°F)

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

          Tech Tips

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

  2. INSPECT BATTERY TERMINAL AND FUSE


    1. Check that the battery terminals are not loose or corroded.

      If the terminal is corroded, clean the terminal.

    2. Measure the resistance of the H-fuses and fuses.

      Standard resistance
      Below 1 Ω

      If the result is not as specified, replace the fuse.

  3. INSPECT FAN AND GENERATOR V BELT

    Click here

  4. INSPECT GENERATOR WIRING


    1. Visually check the generator wiring.


      1. Check that the wiring is in good condition.

  5. CHECK FOR ABNORMAL NOISES


    1. 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


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

    2. Start the engine and check that the light goes off.

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

  7. INSPECT CHARGING CIRCUIT WITHOUT LOAD


    1. A005K5VE01
      Text in Illustration
      *1 Battery
      *2 Terminal B
      *3 Generator

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


      1. Disconnect the wire from terminal B of the generator, and 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 terminal B of the generator.

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

    2. Check the charging circuit.


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

        Standard current
        10 A or less
        Standard voltage
        10.2 to 16.4 V

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

        Tech Tips

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

  8. INSPECT CHARGING CIRCUIT WITH LOAD


    1. With the engine running at 2000 rpm, turn the high beam headlights on and turn the heater blower switch to the HI position.

    2. Check the reading on the ammeter.

      Standard current
      30 A or higher

      If the ammeter reading is below the standard current, repair the generator.

      Tech Tips

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