No Start Diagnosis
When a vehicle won't start, it can be caused by one or more system and/or component failures. Other vehicle components or systems (e.g. lighting, radio, wipers, blower motor) may still operate. Occasionally, the no start symptom will be intermittent.
A No Start Diagnosis involves special computer system scan tools, specialized electrical test equipment, and specialized technician training.
The purpose of this article is to provide an outline for some of the essential steps involved in performing a No Start Diagnosis. This guide can be used—by you and the shop—to track the progress as the mechanics perform the test.
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