Hey all!! Im seeking some tech help with my 2002 Deville. 70k miles.
MAIN PROBLEM
***HVAC blower motor only running now and then. Sometimes it takes 5-10minutes of a drive for it to kick on, sometimes it dosent at all. Here is the interesting spin on it... I found a trick. Hot Summer day... get in the car, start the engine, roll all windows down. Blower motor does not blow any AC at all even though its turned on. Next, reach over and open the passenger door and then close it with a nice tug. BAM. blower motor starts right up full blast instantly after the door slams shut!
**note** the passenger door trick seemed to work for me about 85% of the time
OTHER PROBLEM
***service engine soon light on. Used my buddies ODB scanner... all he could pull was some code regarding a problem with the HVAC system. No mechanical codes.
CODES I PULLED OFF DASH
I just went out and pulled the codes from the DIC. These were the CURRENT codes.
AMP U1000
IPM B0429
PCM P0036
PCM P0141
.....ANY help and guideance is GREATLY appreciated!! Thank you in advance for your time!! :thumbsup:
Both PCM codes will ignite the light, there are some stickies to tell you what the codes mean. As for your motor, on the pass side on the door sill, under the plastic cover there is a grounding point for that blower motor, if you remove the plastic and look at the little black box with about 8 wires going into it, if you turn on the car and then put the ac on, then wiggle that little box, you will probably find that your blower will kick in. just remove the offending wire and re insert into another hole in the black box, that should solve that problem.
Great tip!!!!! THANK YOU! I will look under the sill tomarrow.... this would also make perfect sence out of the passenger door being closed rather hard kicking on the motor. :thumbsup:
Also, for those thinking the motor is going bad.... this COULD be true, yes, however I dont hear any signs of a bad bearing or anything pointing to the motor going bad. When its on, its on strong (no funky noises or sparatic behavior).... just a matter of getting it on. haha :thepan:
way to stay on topic! :banghead: haha, just kidding bud. Yea, I was the one in Woodstock... bought my first house here in Crystal Lake in late aug '07. (wont be going anywhere else soon with this market like this either!)
For the 02 sensor..... are you guys sure on the location of it? If its accesable without taking apart half the car, and you dont need a special "GM tool" to release it I can probly do that myself. Isnt one right before the cat, and the other right after?
You'll need a special O2 sensor tool. It's just a deep well socket with a slot cut down the side. I am pretty sure you only have 3 sensors so it will be the AFT CAT sensor. IF you have 4 (one before and one behind the CAT), then it will be the PRE CAT sensor.
P.S. You might be able to get at that one with an open end wrench.
I pulled the door sill plastic and saw the little black ground wire box. I started the car, made sure the AC was on. Jiggled the wires a bit, and sure enough the AC kicked on. I was ecstatic! BUT.... seemed like it was only fools luck, becuase now when I start the car.... no AC. I reach over and jiggle the wires and nothing. And then sure enough, open the passenger door about as far as I can while reaching over from the drivers seat.... close it with a decent tug, and BAM kicks right on.
Could this just be a bad actuator? Im thinking the door closing is maybe shoving a little burst of air through the HVAC vent that runs from the dash, into the door, and thats whats kicking the system on.
After reading the recent posts of somewhat similar HVAC problems with the member "Joyride" Im thinking an actuator.....
I'd get my hands on the connector to the blower motor and wiggle that. Was that ground wire loose at all? You could try to remove it and clean it up with some sand paper.
The black box with all the ground wires going into it looks fine.... Im not sure which wire is for the Blower motor... theres a handfull of wires, all black ground wires. All that looks good tho.
Where exactly is the blower motor? Ive already had a decent amount of the dash apart so doing again is no problem.
Swanging, since you jiggled the wires and it came on, even for once, you need to disconnect that ground block and find the ground wire from the blower and remove it and look close, you may have to move it to another open spot on the grounding block, I would eliminate that first then try the other ideas.
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