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View Full Version : Are both fans supposed to turn on at the same time?

Peyman
11-02-2007, 12:54 PM
my car is having a overheating problem...

seems like when the fan turns on... only one of them is turning on, are they both supposed to turn on at the same time?...

just wanna make sureeeeee
Big Joe
11-02-2007, 05:36 PM
No, IIRC one goes on when the car is getting hot and the other goes on with the ac/defroster.
Deggy Fresh
11-02-2007, 07:53 PM
No, IIRC one goes on when the car is getting hot and the other goes on with the ac/defroster.

dumb questions.. what is IIRC?
dajuiceman
11-03-2007, 11:11 PM
dumb questions.. what is IIRC?

i was wondering that too
jonnythan
11-03-2007, 11:36 PM
IIRC = If I Remember Correctly
95blackz26
11-03-2007, 11:53 PM
one fan comes on at 220 and the other fan comes on at 230. got this from my dhp powertuner software.

The PCM commands Low Speed Fans ON under the following conditions:

The engine coolant temperature exceeds approximately 106°C (223°F).
The A/C refrigerant pressure exceeds 1310 kPa (190 psi).
The vehicle is shut off when the engine coolant temperature is greater than 140°C (284°F) and system voltage is more than 12 volts. The fans will stay ON for approximately 3 minutes.


The PCM commands High Speed Fans on under the following conditions:

The engine coolant temperature reaches 110°C (230°F).
The A/C refrigerant pressure exceeds 1655 kPa (240 psi).
When certain DTCs set.