- 03 SIERRA ELECTRIC FAN PARAMETERS USING DIABLOSPORT TUNER SOFTWARE
- 03 SIERRA ELECTRIC FAN PARAMETERS USING DIABLOSPORT TUNER TORRENT
- 03 SIERRA ELECTRIC FAN PARAMETERS USING DIABLOSPORT TUNER WINDOWS
Speed relay trigger wire (green wire) this closes the low speed fan relay contacts, and positive battery voltage is If you have any questions or comments on this topic, please reply them here in this thread for everyone's benefit.ĭuring low speed operation, the PCM supplies the ground path for the low speed fan relay through the low
03 SIERRA ELECTRIC FAN PARAMETERS USING DIABLOSPORT TUNER SOFTWARE
No matter what software package, hand-held programmer, or professional tuner that you employ BE SURE that the software used to enable PCM control of the efans allows you to enter the A/C pressure set-point values (in addition to the engine coolant temperature set-points) - THIS IS CRITICAL, if you do not have the capability or software to do this then you must work around the issue by hard-wiring the fans to run when the A/C compressor is active, or hard-wire them to run all the time, or program an artificially very-low engine temperature set-point (like -20 degrees) so that the PCM runs the fans at all times. The EFILive software tuning package has always fully supported efan programming only recent versions of HPTuners (versions released after approximately April 2010?) have this capability.
03 SIERRA ELECTRIC FAN PARAMETERS USING DIABLOSPORT TUNER TORRENT
I took a phone call from a customer that suffered an expensive setback with his truck, he purchased and properly installed a Torrent E-Fan kit on his 2004 Silverado SS, and then took his truck to a local performance shop to program the PCM to operate the efans the failure was that the tuner was using an older copy of HPTuners, an earlier version of the software that does not support updating the A/C pressure set-points in the PCM - the result was that the efans would turn on when the engine got hot, but not always when the A/C compressor was running and this required complete A/C system repair when his compressor burned-up. Make sure your tuning software allows you to input not only the desired engine coolant temperature 'set points', but ALSO the A/C system pressure set-points as well - this will guarantee that the efans are running when the A/C is on no matter how hot/cold the engine is. Limitations of Some Tuning Software Packages I HIGHLY recommend programming the A/C pressure set-points in the vehicle's PCM to operate the efans when the PCM supports it. If you have a 2003+ truck, not only does it have a PCM with logic to fully control efan operation but also a pressure sensor on the A/C system - so the PCM is very aware of exactly what the pressure in the A/C system is at all times this running pressure information is used to trigger the operation of the efans, and you can instruct the PCM exactly what pressures will turn the fans on & off using EFILive or HPTuners tuning software. Option #2 - program the PCM to turn on the Efans when the A/C is on Option #1 - triggering them off the A/C compressor relayįor trucks that use a pre-2003 PCM, you must wire the efans so that, in addition to being triggered by high engine temperatures, they are additionally triggered to turn on when the A/C compressor is active - one way to easily achieve this is to add a diode, relay, and length of wire to join the efan trigger wire to the A/C compressor relay trigger wire.
When the A/C system is overheated and pushed to ultimate duress, the A/C compressor can seize or burn-up if you are fortunate enough to catch the problem as it is happening you might be able to disable the A/C before causing permanent damage the compressor and rest of the system.ĭepending on how your aftermarket electric fans are controlled, you have two options to make sure they will move air when the A/C is operating. When the A/C refrigerant is not cooled it will over-pressurize until either (1) the built-in safety valve on the compressor vents-off the excess pressure to the atmosphere, and/or (2) one of the seals or hoses of the A/C system bursts. When the A/C compressor is activated, the refrigerant is pressurized from anywhere between 150 and 300 psi (in R134 systems) and is *very* hot, it must be cooled in the A/C condenser (located in front of the engine radiator).
03 SIERRA ELECTRIC FAN PARAMETERS USING DIABLOSPORT TUNER WINDOWS
The A/C compressor in contemporary vehicle climate control systems is active much of the time, more than just when you desire cold air - the A/C is also "on" when defrosting windows in the winter, because A/C pulls the moisture out of the vehicle cab. YOU MUST MAKE SURE WHEN THE A/C IS "ON", AIR IS MOVING THROUGH THE CONDENSER/RADIATOR - IF NOT, THE A/C COMPRESSOR WILL VENT REFRIGERANT AND THEN SEIZE - THIS WILL REQUIRE MAJOR SERVICE AND EXPENSE TO REPAIR.
This is very important follow-up information for those working on their cooling systems, and/or replacing their clutch fans with electric fans - in short:
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