My sunroof is stuck with the back raised, the feature never worked it would slide open but the back would not raise or lower the other day it opened on its own and im now unable to close it.

track failure need to disassembly and repair

check fuse and relay if good than possible motor ot track problem their should be a mechanical bypass that will let you close it if stuck open the following information is courtesy of monte carlo forum

To check the condition of your original sunroof guides:

1. Gl*** in closed position.
2. Locate & remove 3 torx bolts on each side of sunroof glass. Lift glass out of sunroof opening & set aside in a safe place.
3. Locate "J" shaped cover plate at front of sunroof track assembly. Remove 2 torx bolts from each cover plate.
4. Lift up bracket to remove.
5. Inspect the plastic guides on each side. The sunroof cables attach to guides on front outer corner. Inspect this area closely for damage.
6. Do not operate the sunroof with the J plates removed.

Troubleshooting:

If the sunroof guides are not broken & the glass is a uniform height along the rear edge your problem may be a stripped gear inside the motor. The motor has a manual override:

1. Get access to the motor by removing the map light/switch console or lowering the front of the headliner.
2. Insert a large standard screwdriver into the nylon bushing at the center of the motor hub. Push up & turn the screwdriver to manually move the sunroof glass. If the unit will fully open & close manually, you most likely only need a replacement motor.

If your sunroof is stuck in the open position follow these steps to get it closed:

1. Remove the glass.
2. Try to close the unit without the glass. Many times one side will still be operational and close correctly.
3. Try to slide the inoperable lift arm forward. If it moves, slide it forward until it stops.
4. You now need to slide the original plastic guide forward to lower the arm to the closed position. Using a standard screwdriver, push it forward. The lift arm should begin to lower.
5. If the lift arm will still not fully lower, remove the J plate as explained above, sometimes the sunroof cable will need to be lifted up to allow the guide to fully slide forward.
6. Reinstall glass.

might try spraying white lithium grease on the slides and open and close few times my g6 did the same thing grease it and open and closed a few times then it work

I'm not familiar with this particular model but it sounds like you ran the motor past the track limits. You will have to take it apart again and reset the motor onto the track, as well as reestablish the track limits for raising and lowering the sunroof. I'm not sure how familiar you are with doing this kind of work, but you would do well to get a factory shop manual in order to do it correctly.
It's not a particularly brilliant system. When you hit the switch, the motor will keep running until it hits the contact on the track that cuts the power. If it doesn't, or the contact is in the wrong place, it will run off the track and then just spin. This true for both directions. Did you notice either of these when you replaced the motor? The shop manual should be able to tell you how to set them correctly.

It is a hydraulic pump that applies pressure to the 2 hydraulic pistons to raise & lower the top. So, check for something obstructing movement first.

The convertible top:

• is motor-driven.
• requires parking brake engaged to complete circuit for operation.
• is equipped with a back window glass (42006) . The back window glass is permanently attached to the folding top back window curtain (52500) and cannot be opened.

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VISUAL INSPECTION CHART Mechanical Electrical

• Damaged fluid reservoir.
• Damaged folding top hydraulic cylinders .
• Damaged folding top motor upper and lower hose .
• Damaged convertible top regulator.
• Parking brake not engaged.

• Open power distribution box circuit breaker CONV TOP (30A), fuse junction panel Fuse 1 (15A).
• Circuitry open/shorted.
• Damaged convertible top switch.
• Damaged raise/lower relay .
• Damaged folding top hydraulic lift motor and plate kit .

• Convertible Top Does Not Raise/Lower

• Open circuit breaker or fuse.
• Circuitry open/shorted.
• Damaged folding top switch.
• Damaged raise/lower relay .
• Damaged folding top hydraulic lift motor and plate kit .
• Parking brake not engaged.

try first to use WD-40 spray to lubricate the guides and make the movement easy,may the motor not faulty.

Try resetting,this works on many cars
Press and hold tilt,watch sunroof untill it raises another half inch
Close tilt and test slide

With key in hand,hit power door lock switch to lock. Raise release handle & lower. Hit power door lock unlock raise & lower handle. May take a couple times is stuck in limbo between lock & unlock mode.

Is there a way to manually close the sunroof in the up position on a 98 Nissan Maxima?

Cable retainers have snapped on the cable and are hanging up at that point. Only way to fix is to replace the cable and retainers and that requires removing the headliners and sunroof.