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 FAQ: Engine Coolant Temperature & Fan Turn-On

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AA
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AA

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FAQ: Engine Coolant Temperature & Fan Turn-On - Page 8 Empty
PostSubject: Re: FAQ: Engine Coolant Temperature & Fan Turn-On   FAQ: Engine Coolant Temperature & Fan Turn-On - Page 8 EmptyWed Sep 02, 2015 10:49 pm

If your coolant temp sensor were bad, you'd easily see it in the temp gauge, or by scanning.

_________________
'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
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EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch

^^^ SOLD ^^^ frown

'05 GTO • 85k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26
Because fun


'70 Olds Ninety-Eight Holiday Coupe • 116k miles • 455 Rocket V8
Because cool


'95 Celica • 152k miles • 0-60: yes
Because free
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charlieRobinson
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FAQ: Engine Coolant Temperature & Fan Turn-On - Page 8 Empty
PostSubject: Re: FAQ: Engine Coolant Temperature & Fan Turn-On   FAQ: Engine Coolant Temperature & Fan Turn-On - Page 8 EmptyWed Sep 02, 2015 11:00 pm

AA wrote:
If your coolant temp sensor were bad, you'd easily see it in the temp gauge, or by scanning.

always scanning. the temps dont look strange to me.. but i have tested wiring and relays and i cant explain why my fans are auto starting.

my temp control in the cabin always flashes on start for about a minute before it stays solid.. readings seem fine but not sure why it blinks at start?

freak
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AA
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AA

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PostSubject: Re: FAQ: Engine Coolant Temperature & Fan Turn-On   FAQ: Engine Coolant Temperature & Fan Turn-On - Page 8 EmptyWed Sep 02, 2015 11:04 pm

Is your AC on?

_________________
'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch

^^^ SOLD ^^^ frown

'05 GTO • 85k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26
Because fun


'70 Olds Ninety-Eight Holiday Coupe • 116k miles • 455 Rocket V8
Because cool


'95 Celica • 152k miles • 0-60: yes
Because free
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http://www.cardomain.com/ride/657082/4
charlieRobinson
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charlieRobinson

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FAQ: Engine Coolant Temperature & Fan Turn-On - Page 8 Empty
PostSubject: Re: FAQ: Engine Coolant Temperature & Fan Turn-On   FAQ: Engine Coolant Temperature & Fan Turn-On - Page 8 EmptyWed Sep 02, 2015 11:28 pm

AA wrote:
Is your AC on?

no.
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Abaddon
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Abaddon

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PostSubject: Re: FAQ: Engine Coolant Temperature & Fan Turn-On   FAQ: Engine Coolant Temperature & Fan Turn-On - Page 8 EmptyThu Sep 03, 2015 9:17 am

charlieRobinson wrote:
my temp control in the cabin always flashes on start for about a minute before it stays solid.. readings seem fine but not sure why it blinks at start?

freak


If your control head is blinking when you start the car, there is something wrong with it, and there are codes stored for it. The display blinks when there's a fault.

"When a system fault occurs, the VF display on the climate control assembly will flash one time per second for 100 seconds."
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FAQ: Engine Coolant Temperature & Fan Turn-On - Page 8 Empty
PostSubject: Re: FAQ: Engine Coolant Temperature & Fan Turn-On   FAQ: Engine Coolant Temperature & Fan Turn-On - Page 8 EmptyThu Sep 03, 2015 10:23 am

If the HVAC system thinks the refrigerant pressure is high it will run the fans.
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charlieRobinson
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PostSubject: Re: FAQ: Engine Coolant Temperature & Fan Turn-On   FAQ: Engine Coolant Temperature & Fan Turn-On - Page 8 EmptyThu Sep 03, 2015 11:05 am

Abaddon wrote:

charlieRobinson wrote:
my temp control in the cabin always flashes on start for about a minute before it stays solid.. readings seem fine but not sure why it blinks at start?

freak



If your control head is blinking when you start the car, there is something wrong with it, and there are codes stored for it. The display blinks when there's a fault.

"When a system fault occurs, the VF display on the climate control assembly will flash one time per second for 100 seconds."

Interesting...
http://buickforums.com/forums/threads/31579-Automatic-Climate-Control-blink-codes
1. Press & hold the OFF, AUTO, and RECIRC buttons for 1 second.

2. the DTC's will display for 2 seconds each and then return to normal operation.

There are 24 DTC's listed in the manual ; 18 start with B; 6 start with U.
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Abaddon
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FAQ: Engine Coolant Temperature & Fan Turn-On - Page 8 Empty
PostSubject: Re: FAQ: Engine Coolant Temperature & Fan Turn-On   FAQ: Engine Coolant Temperature & Fan Turn-On - Page 8 EmptyThu Sep 03, 2015 11:30 am

18 "body" codes, and 6 "communication" codes.
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charlieRobinson
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PostSubject: Re: FAQ: Engine Coolant Temperature & Fan Turn-On   FAQ: Engine Coolant Temperature & Fan Turn-On - Page 8 EmptyThu Sep 03, 2015 3:32 pm

held the 3 buttons but nothing happened. tried with key in run, while running. while temp was flashing and once it was solid. display never changed or showed an error code.
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Abaddon
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Abaddon

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FAQ: Engine Coolant Temperature & Fan Turn-On - Page 8 Empty
PostSubject: Re: FAQ: Engine Coolant Temperature & Fan Turn-On   FAQ: Engine Coolant Temperature & Fan Turn-On - Page 8 EmptyThu Sep 03, 2015 3:34 pm

I never said it would work, I just clarified what the codes "B" and "U" were....

Did you try holding the buttons down, then turning the key ON
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