Alright don't know if this issue has been diagnosed in a discussion before but I have an electrical issue. I am a pretty smart guy when it comes to mechanical but electrical....ummmmm no! Ok here is what happend.... I did some work on my Pathfinder. Replaced radiator, new spark plugs, crank sensor, both cam sensors and a water pump. Well I started it and it ran beautifully for about 5 minutes or so then it starting running rough and got a code for the camshaft sensor bank 2. I went under the hood and realized the connection had come off the sensor. Tried to reconnect it but engine got to hot. Turned it off waited a few minutes then reconnected the sensor. Tried to start vehicle and it wouldn't start. The engine turned over no problem. Cranked engine a few seconds and it tried to start then went back to cranking. I tried this several times same thing. Anyway the last time I tried to start it all the electrical power just shut off. I know battery is good because it is brand new and has 12 v. I checked it with a multimeter. I only had one blown fuse and replaced it to no avail. I checked all three fuse and relay blocks with multimeter and all are getting power. The block relay on the battery blew one of the fuses and was also new. I took the old one and tryed it because it worked before. Nothing! I have no electrical power to the whole vehicle. I suspect the bcm. If someone has had this issue what was the fix? A relay, ground, ecm, bcm? Please anyone chime in with any suggestions. I just bought it and didnt even get to drive it. Thanks all
Riwon72
When you post, it always helps to give some info on your vehicle, such as the year, engine, etc. Based on what info you've provided, I'm taking a guess that this is an R51 Pathfinder with a VQ40DE engine, perhaps? First of all, when you replace the cam and crank sensors on these Pathfinders, make sure they are either genuine Nissan or an OE part, like Hitachi or NTK. There have been a lot of issues with poor quality, aftermarket sensors. There has also been a lot of battery connection incidents on the R51's, as well, so make sure you can't turn the battery cable terminals on the battery post and that the connections are clean. Are you still triggering any codes? Is spark getting to the spark plugs? Have you tried removing the air duct, spray carb cleaner into the intake and then try to start to see if the engine fires on it? If it does, you have a fuel delivery issue. You can find "no start" diagnostic steps in the "EC" section of the factory service manual. NICO Club's website allows free online access to their Nissan FSM's at their website.
Been a long time since I posted and forgot to add that info. It is a 2006 with the 4.0. You have some good suggestions but I have to get power to the vehicle before I can try anything else. I have checked the battery connection and all the fuses still no power to anything. Am I missing something on the vehicle? If it was an American vehicle I think I could probably figure it out but this thing is got fuses for fuses. Thanks in advance.
Let me start out by saying I have no experience with a Pathfinder but, I have a couple suggestions. Possibly a bad ignition switch. I'm not sure whether Nissan is like this or not since I've never checked my Versa, but my Fords have a 100A main fuse in the fuse panel under the hood and if it blows there's no power to anything in the car. Wish I had other suggestions but right now that's all I can think of. If you just bought the vehicle you might contact the previous owner to see if they've ever had a problem like this in the past.
2016 Versa thanks for the info. Yes, I know about domestic cars but not about foreign. There is a 40 amp fuse in the box under the hood. Just checked them all again today. All of them are good. I forgot to mention I am getting power to the obd 2 port and I still have a flashing key and car on the dash but no other power. Please all keep the suggestions coming. I am stumped!
Here's someone that had a similar problem and their problem ended up being an alternator that was over charging. https://x.nissanhelp.com/forums/pat.../forums/pathfinder/19857-stumped-possible-electrical-problem-05-pathfinder.html Something at least worth checking. Have you tried disconnecting the battery and reconnecting it to see if it will reset anything?
Yes, tried everything I know. I just got the service manual and will have to trace all the fuse and relay boxes to see what's blown. I'll let everyone know what I find but please keep the suggestions coming.
If you're blowing a fuse(s), then there's an apparent short somewhere in the system. With the battery disconnected, start at the positive (+) battery connector checking for shorts with an ohmmeter. If it shows a short, leave the ohmmeter on the (+) connector and start pulling every fuse one by one until you find the short.
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
