Symptom Diagnosis: Notes

When a diagnostic code cannot be confirmed or problem cannot be confirmed in BASIC DIAGNOSTIC PROCEDURES, find basic symptom. For example, vehicle engine will not start. Appropriate heading matching vehicle symptom is DOES NOT START. Listed under DOES NOT START are more specific conditions. Find specific condition which best describes vehicle malfunction. Perform checks in order given. DO NOT skip steps.

NOTE: Symptom diagnosis may refer to testing using a diagnostic code chart, even if a diagnostic code was not set.