Diagnostic Process

A good diagnostic process is a logical sequence of steps that lead to the identification of a causal system. The following flowcharts are a graphic representation of the diagnostic process. Use the flowcharts as follows:

^ Choose the appropriate flowchart.

^ Identify the operating condition that the vehicle is exhibiting.

^ Advance through the flowchart from left to right.

^ Match the operating condition to the symptom.

^ Verify the symptom.

^ Identify which category or system could cause the symptom.

^ Refer to the diagnostic symptom chart that the flowchart refers to.