I found something located in the sub-frame, just under the front engine mount that wants to draw current all of the time, even when the key is off.

It is a black box that has "Bridgestone" written on it, and nothing else that I could see through the sub-frame. You can hear it running all of the time, and it sounds like it is an electric pump or motor of some sort.

The wiring for it runs out of the frame, and up with 2 oxygen sensor wires. It connects to a Brown Clip near the front header and runs (What Looks Like) across the engine bay, under the "Nissan - Plastic Engine Cover", then back and down near the passenger-side firewall.

If I unplug the Brown clip, the pump/motor stops, so I know that it is definately what is making the noise. I have some pictures here to demonstrate. Can anyone tell me what this is, and if possible, what could be causing the problem???

Here is the Brown Clip, circled in Red.


Here it is a little closer.


Here is where it runs down with the two oxygen sensor wires.


And here it is when it runs into the sub-frame, just below the front engine mount.


Any help would be greatly appreciated.....

 

You've got an Auto correct? I think it's the front mount making the noise. It's controlled (soft at idle.....hardens up at other times) by the ECM. The rear mount operates the same. This problem is addressed in TB # 01010 that is applicable to these mounts/ECM. There are updated mounts available, but it could also require a replacement ECM.

 

You say the mount is making the noise? It still makes the noise when the car is turned off ??? The only way to stop it is to take off the negative battery terminal.

I'm kind of unclear with what you're saying here, probably because my knowledge of the subject is pretty limited......

 

The ECM should normally "depower" the fr. and rear mounts within about 1 sec. of you turning the IGN. "off". That is not happening (the ECM is keeping power on) because of a problem. Go to the link below. Depending on the dealer that you go to, maybe they'll help by asking Nissan Canada to at least pay for a portion of the repair. http://www.nissanhelp.com/Ownership/.../NTB01-010.htm

 

Thanks a lot man.

Was this a recall/manufacturers problem-type thing, or is this just a service bulletin?

 

It's a technical/service bulletin not a recall......BUT, in Canada some SBs are often referred to as "secret warranties" because they very often are created by the manufacturer to address or cover a known problem or defect with a component, or assembly issues at manufacture, and very often these issues are repaired/corrected and the repairs paid for, or partially paid for, by the auto manufacturer OUTSIDE of the normal warranty period. Sometimes it takes "conflict resolution" or the courts to make this happen, mind you. In this case some early production mounts were defective causing a problem. The added issue here as well is that the defective/failed mount can damage the ECM. This could be a damned expensive repair. (Assuming I'm correct of course). Ask the dealer to verify the production date (or have a look yourself) of the mounts.......if they are the suspect ones it may be worthwhile to "approach" the dealer/Nissan Canada, using the SB as "ammunition" on getting the cost of the repair "adjusted".

 

Would this at all be related to the Smart Entrance Control Module?
Because I had to replace that due to a part of the board being burned-out.
The part is $592 CAD New, so I don't want to replace it again (Although I did get it from a part-out on the forums here.

Or is the ECM that you're talking about different?

 

Unrelated. The ECM = Engine Control Module that controls/monitors the engine operation and some other associated components including the front and rear engine mounts. If/when you disconnect/reconnect the battery ENSURE that the IGN. sw. is OFF, but I suggest that you get this looked at soon so that you are not having to disconnect/reconnect the battery frequently.

 

Hey man, thanks for all of the help. As you know, it was a long weekend here this weekend, so the dealership wpn't be open until tomorrow.

Have you experienced this before, or any other problems like this. I just know that the dealership here won't want to offer ANY help unless they are forced to, from prior experience.

Should I print off the bulletin and drop by to talk with a service manager casually, or should I built on whatever I can find about this and talk to the highest - ranking guy at the dealership? I've dealt with the owner before, and he pretty much takes the stand that he can't do anything with problems that are out-of-warranty, while Nissan Canada won't listen to anything unless you have a current warranty either.

If you (Or anyone else) can give me any information regarding this problem, whether it be technical, or past experience, it would be great. I just don't want to go into the dealership "Half-cocked" if you will.

 

If I unplug it for now, will I have problems?

What is the purpose of having the mount powered???