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Repair Procedures: Test

  1. Start the engine.
  2. Turn on the headlamps and blower motor, and set the engine speed until the ammeter indicates 20A.

    And then, read the voltmeter at this time.



  1. Check to see that the voltmeter reads as the same value as the battery voltage. If the voltmeter reads 0V, and the open circuit in the wire between alternator "B" terminal and battery (+) terminal or poor grounding is suspected.
  2. Start the engine and turn on the headlamps.
  3. Set the headlamps to high beam and the heater blower switch to HIGH, quickly increase the engine speed to 2, 500 rpm and read the maximum output current value indicated by the ammeter.
    NOTE: After the engine start up, the charging current quickly drops.
    Therefore, the above operation must be done quickly to read the maximum current value correctly.


  1. Turn on the ignition switch and check to see that the voltmeter indicates the following value.

    Voltage:  Battery voltage

    If it reads 0V, there is an open circuit in the wire between the alternator "B" terminal and the battery and the battery (-) terminal.

  2. Start the engine. Keep all lights and accessories off.
  3. Run the engine at a speed of about 2, 500 rpm and read the voltmeter when the alternator output current drops to 10A or less
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