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Cooling fans

Tiny
JOHN SAUNDERSON
  • MEMBER
  • 2006 PONTIAC GRAND PRIX
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
I have checked and rechecked fuses and relays. Can you explain open loop and can a scanning tool help?
Thursday, August 16th, 2018 AT 1:02 PM

2 Replies

Tiny
JOHN SAUNDERSON
  • MEMBER
  • 2 POSTS
Thank you.
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Thursday, August 16th, 2018 AT 1:40 PM
Tiny
STEVE W.
  • MECHANIC
  • 13,574 POSTS
Welcome to 2CarPros John.

What do your cooling fans not seem to be doing? Not coming on at all or sticking on or

Open loop in a modern vehicle means the time period when the computer controls for the engine are not using the data from the various sensors to control the fuel mix into the engine, they instead are using default settings that will allow the engine to run but they are not being adjusted the way they are in closed loop operation.

A scan tool could help, depending on what your issue actually is.
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Thursday, August 16th, 2018 AT 2:18 PM

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