2003 sunfire compustart
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=45842
Printed Date: May 09, 2024 at 12:48 AM
Topic: 2003 sunfire compustart
Posted By: ammarsunfire
Subject: 2003 sunfire compustart
Date Posted: December 23, 2004 at 10:11 AM
Hey guys, I'm having a problem starting my 2003 sunfire with my compustart remote. The problem started when my battery died after leaving the lights on. I installed the 2 way alarm starter combo myself but I'm stumped as to why it's not starting properly. This is what happens when I hit the start button on the remote: Brain recieves signal, turns ignition on cranks....as soon as the car starts it dies. So I figure maybe the bybass module messed, so I remove it and try and restart it.....sure enough it does the same thing. Before I jumped to conclusions I put the key in the ignition and tried remote starting it....but it did the same thing. Now I'm confused if it was a faulty bypass then the car should remote start with key in....right? To add to the confusion since my car is standard when I'm turning off the car (it goes in reservation mode) the car remains on untill all doors are shut then proceeds to shut off, again since the bypass is now out how is that possible shouldn't the car shut down and show the security light it like it does when I try and remote start. PS: I don't think it's the tach because the car flashs the security light when attempting to start. ANY HELP WOULD BE GRATLY APPREIATED.
Replies:
Posted By: profuse007
Date Posted: December 23, 2004 at 12:43 PM
have you try to learn the tach again? thats what am sensing about it.
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Houston,TX
"The two most common elements in the universe are H+ and stupidity" (Ellison).
Posted By: ammarsunfire
Date Posted: December 23, 2004 at 12:52 PM
Thanks for the reply no the thing is when the car attempts the start and fails the security light starts flashing and I have to wait up to 30mins to start again, thats why I figured it wasn't the tach, I mean I've had the remote on the car for a long while now, and even when the battery did die before it would still start up with the remote. I pretty sure it has something to do with the bypass. The only thing is when attempting to start the car with the remote with the key in isn't it suppose to start? Thanks agains
Posted By: thepencil
Date Posted: December 23, 2004 at 2:10 PM
Were you able to sucessfully start the car with the key? If not, get the car to start with the keys first before attempting to remote start your car. That way you can isolate the problem wheather it is related to the bypass module.
Try reprograming the bypass module. Maybe the bypass just needs to be reprogram from reading your post.
------------- Be careful whose advice you buy, but be patient with those who supply it. 
Posted By: ammarsunfire
Date Posted: December 23, 2004 at 4:32 PM
I'm able to start the car with the key, and i've tried placing the key in and remote starting but that fails. I've also reprogrammed the bypass which seems to be in sync with the resistance values. I'm missing something but I don't know what. I just don't get why it won't remote start with key in. Anyone have any other ideas. Thanks again
Posted By: kgerry
Date Posted: December 23, 2004 at 6:25 PM
Passlock is not like a transponder... it only generates an R code during crank, so leaving a key in the ignition will do nothing....sounds like you've got a Passlock issue... what bypass module did you use?
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Kevin Gerry
Certified Electronics Technician
MECP First Class Installer
Owner/Installer
Classic Car Audio
since 1979
Posted By: proinstall
Date Posted: December 23, 2004 at 6:37 PM
Def sounds like a passlock issue... if the 'reserve mode' on that works like the compustar models, it should be running when you pull the key out of the ignition.. the module or resistors dont have to be correct after it starts, only during crank.. kinda like a transponder system.. you can hold the key up to the cyl and it will start, then you can remove it after and it will run fine... Edit.. did you try doing the bypass w/out a module?
Posted By: kgerry
Date Posted: December 23, 2004 at 7:29 PM
you're wrong proinstall...Passlock is not like a transponder system and holding the key up to the ignition cylinder will not allow it to start...
-------------
Kevin Gerry
Certified Electronics Technician
MECP First Class Installer
Owner/Installer
Classic Car Audio
since 1979
Posted By: ammarsunfire
Date Posted: December 23, 2004 at 10:13 PM
I'm using the PL2003 bypass unit, so if ur right kgerry about not being able to remote start even with key in, how abouts would I go to verify the problem is infact the bypass.
Thanks for responses guys
Posted By: extreme1
Date Posted: December 24, 2004 at 11:55 AM
relearn the PL2003
turn the potentiomitor clockwise until the LED turns on, then back until it just turns off
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Shaughn Murley
Install Manager, Dealer Services
Visions Electronics
Red Deer, Alberta
Posted By: ammarsunfire
Date Posted: December 28, 2004 at 9:23 AM
Tried that, the light does turn off and it seems like it learned the resistor values but when I hit the remote start the security light and check engine light comes on...it cranks then stalls. I think I've had enough with the stupid modules. We have had some extremely cold wheathers I guessing it might have done something to it. Anywayz I going to try the old fashion way with a resistor and 2 relays. Read a little bit about it but never tried. Can someone post some diagrams as to how I should wire it.....oh and where I can get resistors from (never purchased before). Once again thanks for the responses guys.
Posted By: gus1
Date Posted: December 28, 2004 at 10:48 AM
If the bypass is faulty, when you take it over, and pull the key out, the little security icon will light up solidly (sensing an issue with the PL system.... kind of like cutting the yellow wire when it's already running) but the car will not shut off, as it is already running (ECM uses passlock to start the car, afterwards, it is just monitoring it for any problems..... when it flashes, there's a problem). Here's what you need to verify:
1) The RS unit is putting out a ground when running signal... use a meter. Or, you candisconnect the GWR from the brain, and just ground it to a good ground when you remote start it. If it works, then you have found your problem.
2) Check all fuses. You never know. You might have popped the little 3A or 5A on the PL2003 itself.
PL2003 is a very stable bypass, not a PITA like the PLXR (Why on earthwould something come programmed for probably the least common vehicle???????????)
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Wherever I go, that is where I end up......
Posted By: kgerry
Date Posted: December 28, 2004 at 4:25 PM
hey gus... the PLXR comes programmed for ION on default cause thats the only vehicle you are likely to use it on ( or the ION spinoffs like the Colorado/Canyon, etc) it costs way more than the GMBP which does passlock II like a breeze.... i only use the PLXR for the ION , etc vehicles and use GMBP for the rest.... i guess that's why the company makes more than 1 module...... ------------- Kevin Gerry
Certified Electronics Technician
MECP First Class Installer
Owner/Installer
Classic Car Audio
since 1979
Posted By: slicksam
Date Posted: December 28, 2004 at 4:35 PM
check your ground when running wire......sounds like , the compustart is not giving the signal to the passlock. ------------- Testing is the key
Posted By: gus1
Date Posted: December 28, 2004 at 4:49 PM
Hey Kevin..... yeah, I know they make other modules.... just struck me as odd. Oh well, they only cost $17 or so, I only ordered 10 of them to test drive them on the reccomendation of the local Visions (their guy raves about them). As we're a primarily DEI shop, I get to play "hide the multiple boxes" on a very regular basis. We use very few AS bypasses (PKG's, DATAALL's, and several improperly working DATACAV's)
Yay
Gus
PS: Why is it, in the heat of remote start season, I have done almost 10 decks in 97 and newer Cavaliers in the past 3 days???? Gawd... waaay too many of those things on the road.
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Wherever I go, that is where I end up......
Posted By: H-a performance
Date Posted: January 17, 2005 at 10:55 AM
Compustar starters stut off when voltage drops below 9 - 9.5 volts. most cars will start with the key in this case if it only drops for a second. but not the comp starters. run into this problem a number of times. charge up the batt and you should be fine. if problem continues get a new battery for the car
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