check code .... fan started
Le Mans Master
Joined: Mar 1999
Posts: 9,653
Likes: 1,671
From: Fort Worth Texas
2024 Corvette of the Year Finalist - Unmodified
2023 C8 of the Year Winner - Unmodified
2020 Corvette of the Year Finalist (stock)
2019 C7 of Year Winner (stock)
Former Moderator
Cruise-In I-II-III Veteran
Re: check code .... fan started (Frank92)
that's normal behavior! :yesnod:
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: check code .... fan started (Frank92)
Normal; with the paper clip across A&B and ignition On the ECM is in "diagnostic mode".
In addition, if you start the engine and run the car the SES will flash. The duration of the On vs Off period indicates rich or lean. In closed loop mode at idle or under very light load the On/Off ratio should be about equal, indicating 14.7:1. This can be useful to detect a failed O2 sensor or related trouble.
In addition, if you start the engine and run the car the SES will flash. The duration of the On vs Off period indicates rich or lean. In closed loop mode at idle or under very light load the On/Off ratio should be about equal, indicating 14.7:1. This can be useful to detect a failed O2 sensor or related trouble.
