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3823 messages,  Last post on Oct 12, 2006 at 2:31 PM

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What is this discussion about? Chevrolet Malibu, Chevrolet Malibu Maxx, Electrical, Engine, Sedan

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#3767 of 3823 Re: HVAC problems. [3745] by e2helper Oct 02, 2006 (2:30 pm)
Replying to: 3745 (Oct 02, 2006 7:41 am) BCM doesn't have anything to do with this. The HVAC control head itself has the electronics which control the actuators. In this vehicle the controller uses a "pulse count" method for knowing the position of the actuator. I really don't know exactly how it works, sorry. I do know there are only 2 wires going to each actuator and so if the actuator is moving then the wires to it are both connected.   There isn't any limit switch.   By pulling the HVAC CTRL (BATT) fuse you force the system to lose its memory of motor position so when you reinstall fuse the system goes thru a relearn cycle.   There are 3 motors in system. There are 2 on right side of vehicle around glovebox for recirc door and mode control. The temperature door actuator is on left side by the pedals.   I don't have suggestions at this point. Sounds like dealer is going to have to look at it and I would suspect they end up replacing the temp door actutor or HVAC control head. Replies to this message: 3745 (Oct 02, 2006 3:20 pm) e2helper (Oct 03, 2006 5:14 am) 3745 (Oct 03, 2006 7:31 am) and 2 more...
#3768 of 3823 Re: HVAC problems. [e2helper] by 3745 Oct 02, 2006 (3:20 pm)
Replying to: e2helper (Oct 02, 2006 2:30 pm) Thanks for that. The only motor that runs after fuse is pulled and replaced is the one by the glove box. If you squeeze the glove box and then let it hang down you can see it. I can feel it running by putting my hand on it. Yes, there are only 2 wires going to it. I don't hear any other motors running but will look again tomorrow. They must be using stepping motors for the actuators. Replies to this message: e2helper (Oct 03, 2006 5:14 am) 3745 (Oct 03, 2006 7:31 am) e2helper (Oct 03, 2006 9:17 am) and 1 more...
#3769 of 3823 Smell of Burn Oil after Oil Change by sean74 Oct 02, 2006 (7:19 pm)
I had my engine oil changed at jiffylube yesterday. After I drove home I smelt burn oil, and I also found a small amount of smoke after I opened hood. So what happened? Does anybody have such kind of experience. Thanks a lot. Replies to this message: maxx4me (Oct 03, 2006 12:58 am) mr_bots (Oct 03, 2006 7:02 am)
#3770 of 3823 Re: Smell of Burn Oil after Oil Change [sean74] by maxx4me Oct 03, 2006 (12:58 am)
Replying to: sean74 (Oct 02, 2006 7:19 pm) Yep, just happened to me yesterday after I changed my own. As the filter is removed, the oil gushes out, splashing on to the exhaust pipe. There should be no problem, and the odor will go away in a day or two.
#3771 of 3823 Re: HVAC problems. [3745] by e2helper Oct 03, 2006 (5:14 am)
Replying to: 3745 (Oct 02, 2006 3:20 pm) Actually stepper motors I have seen use 4 wires. Pulse count motors are different and only use 2 wires - although I really can't explain the differences in how they are controlled Replies to this message: 3745 (Oct 03, 2006 7:31 am) e2helper (Oct 03, 2006 9:17 am) 3745 (Oct 06, 2006 10:55 am)
#3772 of 3823 Re: Smell of Burn Oil after Oil Change [sean74] by mr_bots Oct 03, 2006 (7:02 am)
Replying to: sean74 (Oct 02, 2006 7:19 pm) Oil just spilt on something either on the exhaust from letting the oil out, or somewhere on top of the engine from filling it back up. It'll all burn away. If you don't want to drive with it, just start it and let it idle in the driveway.
#3773 of 3823 Re: HVAC problems. [e2helper] by 3745 Oct 03, 2006 (7:31 am)
Replying to: e2helper (Oct 03, 2006 5:14 am) Looks like these might be what you are talking about. They are new to me as well. Most probably Delphi supplied them for the new Malibu. More electronics...........sigh......   http://www.delphi.com/manufacturers/other/micro/cmos/qpcd/ Replies to this message: e2helper (Oct 03, 2006 9:17 am) 3745 (Oct 06, 2006 10:55 am)
#3775 of 3823 Re: HVAC problems. [3745] by e2helper Oct 03, 2006 (9:17 am)
Replying to: 3745 (Oct 03, 2006 7:31 am) I found same link   You are correct. Delphi makes all the components for system Replies to this message: 3745 (Oct 06, 2006 10:55 am)
#3776 of 3823 2000 Malibu Tapping noise by phatmatttrip60 Oct 04, 2006 (6:52 am)
I drive a 2000 malibu Ls and after i start it up the engine makes a tapping noise for about five minutes or until it warms up... is it bad or normal Replies to this message: Mr_Shiftright (Oct 04, 2006 7:33 am)

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