Generator Diagnosis: Notes

Before beginning any generator diagnosis, ensure that the battery is in good condition and has passed all testing procedures. A weak or defective battery will influence the generator testing.

The generator may be tested using:

• DISplus.
• VAT testing equipment.

Workshop Hint: 

Before beginning diagnostic procedures on the charging system do the following:

• Run engine at idle speed for about 5 minutes.
• Switch off all electrical loads.

This is done to ensure the battery is charged to such a level that the generator will not be fully utilized and that loads required during starting (e.g. starter, secondary air pump) will be already switched off.