Basic Knowledge Required

Before performing diagnosis there are some areas that you must be familiar with. Without this basic knowledge, you will have difficulty using diagnostic procedures.
1. Basic Electrical Circuits - The basic theory of electricity is essential. An understanding of voltage, current, resistance and their relationships to each other will help in the diagnosis of an open or shorted circuit. You must be able to read and understand a schematic wiring diagram.
2. Use of Circuit Testing Tools - You must know how to use jumper wires to bypass components to test circuits. You must be familiar with the High Impedance Multimeter (DMM - Digital Multi Meter), particularly essential tool J 39200 or equivalent. You must be able to measure voltage, resistance, and current with the DMM you are using.
3. Use of the scan tool - You must know how to use, connect, manipulate and diagnose circuits using this essential tool. You must be familiar with screens and control module partitions.