2002 Saturn L300 climate controls shuts down

Tiny
GREGSAUTOMOTIVE
  • MEMBER
  • 2002 SATURN L300
  • 112,590 MILES
I have changed controler and bcm module ans problem persists. Climate control shuts down completely. And after couple hours it comes back on. Then after a while shuts off. When it shuts down it still has power to controler
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Friday, June 28th, 2013 AT 11:52 AM

10 Replies

Tiny
SATURNTECH9
  • EXPERT
So you put in a new HVAC control head and new Bcm not used?Also you programmed both with the correct calibration files?Also what was it doing before replacing the two parts? Any codes in the computers?Did you do a full scan on all the computers for codes?
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Friday, June 28th, 2013 AT 11:57 AM
Tiny
GREGSAUTOMOTIVE
  • MEMBER
Both parts were used but known to be working. There was only one code in the system which was low efficiency on one bank but installed new cat and then cleared code with scanner. And has nothing to do with this problem. To program bcm there is a diy ritual with a timed key on ten mins three times and this is all sucessful as the car would not run without it. There is no programing for the controller. It works perfectly for an hour or so then screen goes blank as if lost power. Dome light does not come on during same time controller goes blank
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Friday, June 28th, 2013 AT 12:23 PM
Tiny
GREGSAUTOMOTIVE
  • MEMBER
I have no problem with fair donation if you come up with solution to problem
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Friday, June 28th, 2013 AT 12:25 PM
Tiny
SATURNTECH9
  • EXPERT
The diyer programing your talking about is only the manual 30 min pass lock relearn procedure to learn inthe pass lock to the used bBC so it will start. You can actually program those bcms and HVAC auto climate control heads with the tis 2000 service stall software. Options the car has calibration files etc. So the BCm and the HVAC control head both stop working after 1hr?Also the dome lamp is the only thing that stops working after a hr of the car being on?I need as many details as you can give since iam not there to see whats going on?Also the old bcm and HVAC control head have the same symptoms as the used ones you put in?
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Friday, June 28th, 2013 AT 5:25 PM
Tiny
GREGSAUTOMOTIVE
  • MEMBER
The programing is not the problem. The controller as I understand it is to upgrade or improve operation and does not address a complete blank screen
intemittent problem. The programing available for the body control module
is to address mileage and options but options are identical and again does not address the problem. LET ME EXPLAIN EXACTLY WHAT ITS DOING AGAIN. Sometimes it works sometimes it doesnt. Somtimes it will work for twenty minutes sometimes it will work an hour or two. And when it goes blank screen
all climate controls are inoperative. No ac no heater blank screen and no function at all. AND AT EXACTLY SAME TIME CLIMATE CONTROL DIES DOME LIGHT DOES NOT WORK. When climate control comes back to life then immediately begins working normally. This problem has been there since there since he got car recently. The problem was not affected a all by changing them. All parts have exact same symtom. There are no c
codes since clearing one unrelated code. Again power wire is hot when that powers screen is blank with power wire hot. This site is very hard to tyoe into the screen keeps moving and I cannot see what Im typing Im using android
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Friday, June 28th, 2013 AT 6:46 PM
Tiny
SATURNTECH9
  • EXPERT
I use the android to answer questions you just have to get use to it. The mileage issue your talking about is a calibration to correct the cars that suddenly display crazy mileage like 600,000 miles.I was talking about programing set up on the bcm that is new to the car.I have had air bag lights etc stay on from swapping bcms etc for testing. So when the display is blank you said you have power to it how is your ground input to it?
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Friday, June 28th, 2013 AT 7:31 PM
Tiny
SATURNTECH9
  • EXPERT
Let's try this with the dome lamp inop is it inop in the door position and the on position?Just in the door position?With the dome lamp inop is the power to the orange wire?Also in the door position with the door open is there a good ground to the white wire?And in the on position is there a good ground to the black wire?If we solve the dome lamp inop it could lead to the HVAC head inop issue as well.
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Friday, June 28th, 2013 AT 7:52 PM
Tiny
GREGSAUTOMOTIVE
  • MEMBER
I did consider checking dome light grounds. I did not check ground on controller yet either because I didnt have wiring schematic yet. I was hired by owner after he gave up on it to solve his problem. I did confirm his used parts work in other cars if the diy is applied correctly. When I was hired car would not run so I have been successful in a couple eliminating things and I agreed h Illr had a couple good guesses. I will let him know the things we need to check and get back tk you after I check them. Thanks Greg
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Friday, June 28th, 2013 AT 9:41 PM
Tiny
SATURNTECH9
  • EXPERT
Your welcome keep m posted.
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Friday, June 28th, 2013 AT 9:55 PM
Tiny
MURRAYD6
  • MEMBER
Can you please tell me if this issue was resolved. I know this thread is a couple years old, but I am experienceing the exact same issue with the auto climate control in my 2003 Saturn LW300. Same issue - intermittent shut down of AC unit in conjunction with the dome light. Any onformation you can provide would be much appreciated. If checking grounds, where would I locate terminals.
Thanks,
Dave (not a mechanic)
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Monday, July 25th, 2016 AT 8:39 AM

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