Initial Inspection and Diagnostic Overview

Inspection and Verification

1. Verify the customer's original concern by operating the electronic automatic temperature control to duplicate the condition.

2. Inspect to determine if one of the following mechanical or electrical concerns apply:

3. If inspection reveals obvious concerns that can be readily identified, service as required.

4. If the concern(s) remains after the inspection, perform the following EATC System Self Test:

NOTE: If you were directed to this Section from Information Bus and any "U" codes were logged, perform all "U" code diagnosis before proceeding with Self Test. Perform all pinpoint tests as instructed. Do not replace any parts unless instructed to do so by specific pinpoint test step.