Diagnostic Table

Diagnostic tables are an organized and systematic approach to diagnosing a Diagnostic Trouble Code (DTC). The table consists of five separate columns: step number, action, value, yes, and no. The step number indicates which step is being performed. The action column contains all necessary information about how to perform a certain test. The last sentence in each action block 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 yes or no answer to each test will lead to the next logical step within the diagnostic table. Most or the Yes and No boxes will take you to the next logical step within the table. However, some boxes may lead to other system diagnostics, or to the Diagnostic Aids when an intermittent condition exists.

Always begin with step 1 at the top of the table unless there is a notice or caution above it. Never skip steps or jump ahead in the table unless specified by the Yes/No columns. Taking short cuts often leads to misdiagnosis. When a problem is found, make the necessary repairs, and then verify the repair.