Diagnostic Table

The diagnostic tables are an organized and systematic approach to diagnosing a Diagnostic Trouble Code (DTC). The table consists of 5 separate columns: Step Number, Action, Value, Yes, and No. The Step Number column indicates which step is being performed. The Action column contains all the necessary information about how to perform a certain test. The last sentence in each Action Column cell will always be a question. The question can only be answered "Yes" or "no." The answer to the question will dictate which column you will go to next - Yes or No. The answer to each test will lead you to the next step to be performed or a particular action to take. Most Yes and No cells will have a Go to Step X statement. If a Yes or No cell does not have a Go to Step X statement, the actions performed in that Step will be the last for that table because the result will either be a solution or a Fault not present condition.

Always begin with Step 1 at the top of the table unless there is a Note or caution above Step 1. Never skip steps or jump ahead in the table. Taking short cuts often leads to misdiagnosis. When a problem is found, make the necessary repairs and then verify the repair.