Harnessssssssssss

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Darkfoxx
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Re: Harnessssssssssss

Postby Darkfoxx » Tue May 24, 2011 10:42 pm

Harness wrote:Remember I work for beer :)

Fuck yeah.
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Re: Harnessssssssssss

Postby Jif » Wed May 25, 2011 8:28 am

Harness wrote:
Jif wrote:code P0457. same as before even tho it's a new cap and the code was reset. This time the other code, P1000, is absent. My dad says he has access to a smoker so we're gonna do that probably next week.

I saw a few people with the exact same problem as me on some random mustang forums. same code and also all smelled gas. they all replaced the cap and reset their codes only to see them pop up a few weeks later. exactly as me.

oh yea, 2 of the people that followed up their posts with their results said there were leaks in the vapor system. another guy said it's not uncommon for the hose to leak where it connects to the fuel tank



To properly smoke test the evap system you should really have a scan tool capable of closing the evap vent valve. Basically, the vent valve allows fresh air to enter the evap system and is normally OPEN unless closed by the PCM. So... if you went to smoke the evap on your car without a scan tool you WILL find a leak, unfortunately, its only leaking where it's supposed to and your not building up enough pressure to properly test the rest of the system. You can always jump out the vent valve electrical terminals but that's usually a pain in the ass. Also, you can pinch the hose on the side of the vent valve that would vent to atmosphere, but your not testing for leaks that are caused by the vent valve itself. ugghhh..... It can be a gigantic whirlwind of feces trying to find a leak in the evap system but you do have one thing on your side. If you smell gas then the leak has to be on the larger side and not some tiny little thing that everyone in the neighborhood has tried and failed to find but don't forget to check the actual components in the system as I see them fail much more then simple hoses or connections.

Remember I work for beer :)

word thx for the advice. my dad's best friend, whom i was named after, has that snap-on touchscreen laptop scantool and im guessing he's the one who also has the smoke machine. we'll give it a whirl and see what happens. good chance im moving out this weekend so it wouldnt happen until late next week or the week after.

what is the leak doing besides spitting out a code and causing my car to smell? is it robbing power? not enough gas getting into the engine?

also we change the fuel pump last summer but this only started happening about 3 months ago. definitely didnt notice anything until after the brunt of winter.

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Re: Harnessssssssssss

Postby Harness » Wed May 25, 2011 11:01 am

Jif wrote:
what is the leak doing besides spitting out a code and causing my car to smell? is it robbing power? not enough gas getting into the engine?


The leak is causing you check engine light to come and NOTHING else....well it's also polluting the environment but we all know your feelings on that matter :)

The only problem affecting performance I've seen in an evap system is the purge valve stuck open. How it works is the PCM commands the purge valve open and the vent valve open so you draw the gas fumes out of the canister and into your engine without creating a big fat vacuum in your gas tank. If the purge valve sticks open on some systems it can create an engine vacuum leak that in turn causes the PCM to dump more gas and lower fuel economy. Thats like worst case scenario with one of these systems except a hole in your gas tank thats spilling all over the place.

When you replaced your fuel pump did you lube all of the rubber o-rings? If so what did you use for your lube?
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Re: Harnessssssssssss

Postby Jif » Thu May 26, 2011 9:25 am

Harness wrote:
Jif wrote:
what is the leak doing besides spitting out a code and causing my car to smell? is it robbing power? not enough gas getting into the engine?


When you replaced your fuel pump did you lube all of the rubber o-rings? If so what did you use for your lube?

we did but i dont remember what we used.

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Re: Harnessssssssssss

Postby Darkfoxx » Sat May 28, 2011 7:37 pm

Yo Bumble, I'm having issues with my windshield wipers. Hopefully you're on vent tonight.

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Re: Harnessssssssssss

Postby Harness » Sun May 29, 2011 11:08 pm

Darkfoxx wrote:Yo Bumble, I'm having issues with my windshield wipers. Hopefully you're on vent tonight.

/thread hijack



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Re: Harnessssssssssss

Postby Darkfoxx » Sun May 29, 2011 11:15 pm

I'll paste what I posted over at my BMW forums:

----------------------------

Well, this is interesting. I was driving in the rain on Friday and put my wipers on in position 1 (rain sensing). Everything was working normally until I parked my car, shut it off, and noticed the wipers were still on after I shut the car off. I start moving the wiper control lever up and down to make sure it wasn't still in position 1. When I moved it to position 0 (off), they still didn't turn off. If I went all the way up (pos 5?), the wipers went faster...obviously, so it seems like the control works partially at least. When I went back down to 0, they were going a medium speed and still weren't shutting off.

Alright...the car is off, so I go to the fuse box and pull the rain sensing fuse (#28) to see if the sensor is dead. The wipers stay on. OK, so I pull the wiper fuse (#38). The wipers finally turn off.

If I put the wiper fuse back in, they start up again at that same speed.

What could be the problem? Short to ground maybe because of the rain? Bad relay?

Saturday update: I tried taking out the wiper relay today but I couldn't pull it out. Am I missing something?

I took this pic. It's one of the black ones:
http://i.imgur.com/Ls16b.jpg

Part #2 on this list (part 61316919113):
http://realoem.com/bmw/showparts.do?mod ... g=61&fg=25
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Re: Harnessssssssssss

Postby Harness » Mon May 30, 2011 12:07 am

Checking the relay is a very good place to start diagnosis. They can sometimes be tight in there and even require a small pair of pliers to yank them out. Also, some relays have a locking device like a normal electrical connector would.

I usually try to find a relay that matches the one I've pulled out, like the horn relay or something, and plug it in the suspect relays socket and see if that works.... on the other hand, I did that once on a Volvo to a relay that looked identical to the one I thought was bad, ended up starting a small fire behind the dash. The only times I swap relays in a car is if the wiring schematic is stamped right on the side of the relay or I know for sure that you have the same type of circuit.

You can test the relay circuit with a test light but without a wiring schematic I wouldn't go poking around under there just yet. I have access to all that shit in work and the program I use dumbs down the drawrings for stupid americans. Once I get a look at the wiring diagram I can tell you what parts are even possible to be bad for the failure you have.
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Re: Harnessssssssssss

Postby Harness » Mon May 30, 2011 12:21 am

Posted on IATN.net: 2003 BMW Z4, Safety, Wipers, will not shut off

The wipers on this vehicle run continuosly, regardless of wiper position, according to the customer. Of course we have not been able to duplicate this yet in the shop. I did have a code in the GM: "33 wipers: interlock active", but I have no information about what to do with this code. I tested the rain sensor and checked the wiper switch live data with tha Autologic, no problems there so far. Cleared codes and none came back. The GM and wiper relay have already been replaced. I'm leaning towards a wiper motor (not sending a park signal to the GM?), but I cannot confirm this. Any help regarding the code or any other ideas would be greatly appreciated. Thanks in advance.
Related Repair History

Wiper relay and General Module recently replaced.


Erik from Texas
Sep 1, 2010 5:11:51 PM

Guided test plan is the only place will give you code description stores by GM
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Ralph from Maine
Sep 2, 2010 4:07:10 AM

Rolf I am not overly familiar with the z4 but I have seen alot of park switch problems on the 3 series and z3.If the problem is that intermittent best to estimate a wiper motor and let customer decide. You could waste alot of time proving fault. Best of luck!! Ralph Davis
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Scott from Missouri
Sep 2, 2010 4:11:03 AM

Are there other faults stored in the car? If there is a problem with the PT can ,the wipers will run continually.
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Brian from Connecticut
Sep 2, 2010 6:21:06 AM

Does this car have automatic wipers? (The rain sensor is by the rear view mirror on the windshield)


FIX posted on Sep 8, 2010 9:13:12 AM

Thanks to all that took the time to help. It turned out to be the wiper motor. I hooked up my lab scope to the park signal wire coming from the wiper motor to the GM and was able to see an inconsistent pattern at times, no "park" signal. Replaced the motor and verified good park signal pattern.


From what I'm reading about your wiper system it may not be wise to do anything other swap out the relay. Were talking a low voltage park signal to a module and infra-red rain sensors. This is all very delicate shit here that could easily get dicked using equipment not meant for high impedance.
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Re: Harnessssssssssss

Postby Darkfoxx » Mon May 30, 2011 7:29 am

I see.

Well, since the wipers aren't turning off I was thinking the relay was bad in some way. Maybe even one of the relay's blades has residue on it that needs to be cleaned off (like some carbon, ya know?) Grasping at straws...I really don't want to drop more fucking money at the shop. Since I need to get my state inspection done, this is kinda fucking me over. I think they check wipers (?) so I wouldn't pass.

I'll wait till you look at those wiring schematics.
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Re: Harnessssssssssss

Postby Harness » Mon May 30, 2011 12:25 pm

Darkfoxx wrote:I see.

Well, since the wipers aren't turning off I was thinking the relay was bad in some way. Maybe even one of the relay's blades has residue on it that needs to be cleaned off (like some carbon, ya know?) Grasping at straws...I really don't want to drop more fucking money at the shop. Since I need to get my state inspection done, this is kinda fucking me over. I think they check wipers (?) so I wouldn't pass.

I'll wait till you look at those wiring schematics.


They should check your wipers as part of inspection. Maybe if you run it over for inspection now to the same shop you just had all that work done at they will buzz it right through under the impression that they just checked it out anyway :)
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Re: Harnessssssssssss

Postby Darkfoxx » Mon May 30, 2011 3:13 pm

Well that's the thing...I'll be taking my car to that shop if I can't fix this wiper thing myself. I'd also get the inspection done while I'm there.

I'm gonna try to pull out the relay when I get home. If the thing is just fried, I could easily order a new one for 13 bucks.
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Re: Harnessssssssssss

Postby Darkfoxx » Mon May 30, 2011 5:27 pm

Z4 status update: Alright, so I did more testing. Fuck it's hot...I almost died in the 100 degree heat crammed into the passenger footwell pulling out relays. WOW THAT WAS DIFFICULT!

Removed negative wire from battery terminal. I pulled both black relays out. One of these supposedly control the wipers and the other one controls the fog lights since the part number matches the realoem.com part # that I linked.

Image

So after I took both out, I reconnect the negative terminal, pop the wiper fuse back in. The wipers start moving. WTF? Does this mean the relay is bad or what? I'm thoroughly confused.

EDIT: Probably gonna try this over the weekend since I have nothing to do: http://forums.bimmerforums.com/forum/sh ... ?t=1115530
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Re: Harnessssssssssss

Postby Jif » Wed Jun 01, 2011 7:09 am

Darkfoxx wrote:Z4 status update: I'm thoroughly confused.

Trebeck:"Nicholas Cage"
Nicholas Cage:"i'm confused"
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Re: Harnessssssssssss

Postby Harness » Thu Jun 02, 2011 9:26 pm

Diagram:
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