Front seat stays in the reclined postion..

If it's binding the circuit breaker will shut off the recline motor. You have to replace the entire back frame to replace the motor

recline mechanism in the chair has failed, replaced the chair.

check for something jammed under seat ? Does it make a noise when you try to raise it ? You smell anything unusual ?

you have to first take the console covers off, remove the glove box, the ashtray, and all the screws and panel push pins. there is no short cut to getting the instrument cluster panel off. recline the front seats all the way after sliding the seats to their rear most positions. you can then access the screws that keep the console on. remove these then the shifter cover screws near the floor. after you have taken those out, remove the vent/heater covers and then lying on the floor look up and you will see all the screws that will need to be removed first.

there is mechanical lock on every seatbelt activated when you push the breaks find lock and realse it by hand

try pushing in .. first...if no luck.. try pulling out and down...

look under the seat, check that the locking arms on both sides are free and not sticking, you may what to lube them with wd 40, here a picture to help explain what i mean, this seats are 2 way power which use motors to adjust height and recline and up and back are manually adjusted, hope this is helpful.

On W-Body vehicles, the front seats are secured to the floorpan by two front hook attachments and two rear bolts installed to nuts welded to the floorpan.
The manually operated two-way front adjusters provides only fore and aft movement of the seat. When the seat adjuster handle located on the front seat is pulled up, the seat adjusters unlock, permitting travel of the seat. When the seat is in the desired position and the seat adjuster handle is released, the seat locks in place.
A power operated six-way seat adjuster is available. The adjusters are activated by three 12 volt, reversible, permanent magnet motors with a built-in circuit breaker. The motors are energized by a switch bolted on the seat side panel.
The three motors drive the front seat and rear vertical actuators and a horizontal actuator. When the adjusters reach the limit of travel, torque is absorbed through the rubber mounted grommets located between the motor and the support. An overload relay is provided in the circuit and will open should excessive stall be applied.
The optional 60/40 split bench front seats have seat back head restraints on the driver's and passenger's seat back. The head restraints are designed so they cannot be removed from the seat back without first inserting a small rounded tool inside the head restraint support tube to release the locking tab. The 60/40 split bench seat is equipped with a reclining mechanism on both the driver's and passenger's side. The recliner lever is located on the outboard side of the spring cushion. When the lever is pulled upward, the spring loaded dual linear reclining unit located in the cushion frame is released, allowing the seat back to be pushed rearward or allowing the spring loaded reclining unit to bring the seat back forward.
Bucket seats are equipped with manual reclining mechanisms. An optional six-way power seat adjuster is available. Some bucket seats are equipped with inertia seat back locks. This system allows the seat back to fold forward without requiring the occupant to release a locking lever or access to the rear seat area. During a sudden stop or deceleration, or if the front of the vehicle is nose down, the inertia system of the seat back lock will engage, holding the seat back in its rest position. A release lever is provided to allow manual release of the seat back lock when the vehicle is in the nose down position. The release lever is located at the lower rear outboard corner of the seat back.
Some W-Body vehicles (notably Pontiac coupes) have passenger front seats equipped with an E-Z Entry device. This is actuated, in an unoccupied seat, by completely folding the seat back forward disengaging the adjuster, and sliding the front seat forward to gain access to the rear seat area. To return the seat to its normal position, return the seat back to its rest position, and slide the entire seat rearward, engaging the adjuster.
W-Body rear seats are available in several styles including a rear seat with an integral child restraint device.

where is the overload protection circuit for power seat of nissan altima 2001 , the seat does not move back and front let me know if i could do the seat move

sounds like you need a new rear stat. About £10 in the UK.