No. 6 Windshield Fogged: Notes

WARNING: This page is about a different car, the 2004 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

When performing an asterisked (*) troubleshooting inspection, shake the wiring harness and connectors while doing the inspection to discover whether poor contact points are the cause of any intermittent malfunctions. If there is a problem, check to make sure connectors, terminals and wiring harness are connected correctly and undamaged.
When checking intake motor drive signal, test it within 20 seconds after switching REC/FRESH mode. For that signal turns off after 20 seconds .

Fig 1: Description & Possible Cause Table - Windshield Fogged

Courtesy of MAZDA MOTORS CORP.