Tricking the computer
Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=74950
Printed Date: June 04, 2024 at 8:19 PM
Topic: Tricking the computer
Posted By: amcmac
Subject: Tricking the computer
Date Posted: March 23, 2006 at 5:24 AM
I installed a 561T and a GM-SL module on a '04 Silverado. I am under the impression that the GM-SL will kick on the heated seats, heated mirrors and rear defroster if the outside temp is below 32. We have gotten down into the upper 20s here recently and I haven't seen anything kick on. First do the indication lights for the seats or rear defroster come on when this is done? Second, is there a way to trick the computer into thinking the temp is lower than 32 to test it out? I know the sensor for the rear view mirror is in front of the radiator, but I wasn't sure what sensor the GM-SL used. I thought it could be the engine coolant temp sensor as well. Thanks for the help. Aron
Replies:
Posted By: doibuy
Date Posted: March 23, 2006 at 9:37 PM
GM-SL? Who makes this, and where do you get it? I've been trying to figure out a way to kick on my seat heaters with the auto start for a while now, with no luck. I'd like to check this thing out, especially if you can get it to work, sorry though, not any help.
Posted By: bqblaz
Date Posted: March 23, 2006 at 10:49 PM
I have a Viper 791 and a GM-SL on my 04 avalanche and when r/s the heated seats turn on low when the engine temp is below 32 and the indicator light on the doors do come on. https://bypasskits.fortinautoradio.com/
Posted By: amcmac
Date Posted: March 24, 2006 at 6:50 AM
Is there anything special I have to do to the GM-SL to make the heated functions work?
Posted By: brcidd
Date Posted: March 24, 2006 at 6:56 AM
Just wait until engine temp is below freezing- the old GM-U7 also did this- have had one on an '04 Silverado for over a year with no complaints.............
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Brcidd - Engineer That Does Remote Starter Installs on the side.
Posted By: amcmac
Date Posted: March 24, 2006 at 8:26 AM
I have tried it with the temp in the mid 20s and nothing. I didn't change any of the special programming that allows you to enable or disable the different heated functions. I might check to see that they are all enabled. Any other ideas?
Posted By: gus1
Date Posted: March 24, 2006 at 9:04 PM
Mid 20's isn't freezing enough.... think closer to 10ish (I know the seats and things turn on on these trucks below -5C up here, which is around 10F.)
Gus
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Wherever I go, that is where I end up......
Posted By: amcmac
Date Posted: March 25, 2006 at 7:49 AM
Does anyone know if the brown accessory 2 wire needs to be hooked up to make the heated seats work?
Posted By: Chris Luongo
Date Posted: March 25, 2006 at 10:38 AM
Does the module work on engine temperature from the car's databus....... or the temperature of the module itself?
Why not place the module in a household freezer, then quickly bring it to the car, plug it in, program it, and remote start?
You might tape a towel around the module before putting it in the freezer, so that your hands won't warm it up while re-installing it.
Posted By: amcmac
Date Posted: March 25, 2006 at 10:51 AM
My understanding is it uses the engine coolant temperature. I could be wrong.
Posted By: brcidd
Date Posted: March 25, 2006 at 1:55 PM
The note at the bottom of the application guide on crimestopper.com (databus manuals) says: "heated seats will turn on low power if the engine temp is below 32 def f when started" The brown accessory wire does not need to be powered during R/S ------------- Brcidd - Engineer That Does Remote Starter Installs on the side.
Posted By: amcmac
Date Posted: March 25, 2006 at 2:24 PM
So now I am back to square one. I have started it when the outside temp was below 32 degrees and the truck had been sitting all night (I would think that would be enough time for the engine coolant to cool down). I am thinking about taking the plug for the temp sensor off and complete the circuit with a resistor that would make the truck think it is 10 or 0 degrees. If that doesn't kick them on I don't know what will. Anyone else got an idea, I am running out. AC
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