Have a 00 se maxima that lost all power options (locks, sunroof) but everything else is ok (radio, ignition..) need help fixing it i am doing it in my garage anyone know what to check replace?? my last option is to take it to the nissan garage down the road...

 

Under the hood between the battery and the fender is a fuse block. There is a 40 amp fuse for the seats, windows and sun roof. The cover labels it as "FL40A POWER WINDOW".

You could swap it temporarily with one of the radiator fan fuses.

 

tried switching the fuse still no power....

 

OK, then it is time to break out the voltmeter and do some troubleshooting.

The distribution of the 12 volts starts at the battery, to the fuse, to a circuit breaker, to the seats, windows, etc.

So the logical point to check is after the circuit breaker, which means you have to get up under the dash and check out the circuit breaker. The circuit breaker is in a cluster of connectors located a couple of inches behind the fuse panel. Look up from the floor and you will see a white plastic box-like thing with a bunch of wire harnesses plugged into it. On the side of it, closest to you is a gray cube shaped thing (kind of like a relay) with 2 wires plugged into it. This is the circuit breaker. It does detach from the white part somehow, a lock tab you have to press.

On the circuit breaker, check for 12 volts. If you haven't unplugged it, you should have 12 volts on both wires. The white with black stripe wire comes from the fuse under the hood. The white with red stripe wire is what goes to the seats, windows and other stuff.

If you don't have 12 volts on the white/red stripe wire, the circuit breaker is bad.

If you do have 12 volts on the white/red stripe wire, keep monitoring the voltage on the wire while you press a button for the seat. If the voltage goes to zero, the circuit breaker is bad.

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Forgot I had a photo of the circuit breaker. I removed the lower dash trim in order to take the photo, but you don't need to remove it.

 

Your Master switch is likely blown. If the master is broken no power windows or locks will work in the car whatsoever.

 

thanks for the reply , going to replace the circuit breaker i think may be the problem... starting monday

 

any way to check the master switch??

 

Not without a working switch available. The board of the window switch is complex and not all of the circuits can be reliably tested quickly. My best advice to you, go to Ebay and get a Master for about $25-$35 shipped and see if it makes a difference. Better to spend a few dollars than spend a few weeks testing circuits on your master switch.

 

replaced fuse and circuit breaker still no power locks/windows or sunroof... next step??

 

master window switch, as already told to you earlier

 

The only problem with saying master window switch is that it has nothing to do with the sun roof.

OP - do your power seats work?

 

power seats work, already got a master switch coming.

 

replaced master switch still nothing, no keyless/ sunroof buttons work not even the overhead light

 

You have mentioned the keyless doesn't work. I need some clarification.

By keyless, I assume you mean the keyfob remote. If so, do the locks still work from the door switches? The switches on both front doors?

When you put the key in the door and turn it 2 times to either lock or unlock, will all the doors lock or unlock?

Do you have a voltmeter?

 

yes i do have a multimeter.... ya the remote doesnt work, i have to lock them by hand no they have no power..

 

I don't know what the problem is. You either have a bunch of things that went bad all at the same time or the SECU is bad.

The SECU is a computer with a cpu in it and a program to tell it what to do and memory to hold some information.

The door locks are operated by the SECU. All the key in the lock outside and the buttons on the inside of the door do is "tell" the SECU to lock or unlock the door. The SECU then sends power to the lock mechanism to accomplish it.

And the SECU is involved with the sunroof also, but in a different way than the door locks.

Was anyone working under the dash by the SECU? It is between the steering column and the center console and has 2 wire harness plugs on it. While all the wire harness connectors lock together, maybe somehow one one of the connectors is coming out.

Then, being a computer, maybe it needs to be reset. Take off the positive battery cable and let the car sit for a half hour. Then re-connect the battery and try it.

Otherwise I'm thinking the SECU is bad. I wish you had one you could test with, A buddy's car or something. I hate to see you possibly waste money buying a SECU on a guess.

 

ill have to try again tomrow.... ill check the secu wires and reset it.... if not its ok i can call the guy at nissan ask him for some help and maybe ill end up paying the 90 bucks for the hour for them to find out whats wrong.

 

reset it like you said still noting, called the Nissan technician he said would maybe be the body control module...... im still looking for the SECU I see two boxes under the dash ones white with ABS on the bottom and a black box behind it.... heres a pic of both

 

the SECU is the 2nd photo, the pinkish box with 2 wire harness connectors,. The other one is the Mode Door Motor, the thing that moves doors inside the air ducts to make the air come what ever vents you want.

The technician called it the body control module (BCM) which is what it was called in the 3rd and 4th gens.

 

http://forums.maxima.org/5th-generat...m-problem.html

 

replaced the secu still no avail, what else could this possibly be?? yanked one out of a 00 maxima se