Diagnostic Table

The diagnostic tables are a systematic approach to diagnosing a Diagnostic Trouble Code (DTC).

The table consists of five separate columns:
^ Step
^ Action
^ Value(s)
^ Yes
^ No

The step number indicates which step is being performed. The Action column contains all of the information necessary in order to perform a certain test. The Action cell must always end with a question. The question must lead to a yes or a no answer. The answer to the question determines which column you go to next. The value(s) column will contain any specifications that you are asked to test for. The answer to each test will lead you to the next step, or to the particular action to take. Most boxes will have a "Go to Step" statement. If the block does not have a "Go to Step" statement, the text inside that block will be the last instruction given in the table. The instruction will be a solution, or a Fault Not Present, or a Go to Diagnostic Aids.

Always begin with Step 1 at the top of the table unless there is a Note or a Caution before the step. Do not skip steps in the table. Taking short cuts often leads to misdiagnosis. If you find a problem, complete the necessary repairs, and verify the repair.