Mitisubishi Montero (2001) Cargo Door Lock/Handle Stuck

door handle latch could be loose, but kind a weird happend on booth doors, souds more like child lock protection: Child Protection Door Lock Location
To use the system, open each rear door, use a flat blade
screwdriver (or valet key) and rotate the dial counter-clockwise to engage the lock and clockwise to disengage
the child protection locks. When the system on a door is
engaged, that door can only be opened by using the
outside door handle even if the inside door lock is in the
unlocked position.

stuck has 3 meanings, (lock dead, 2 ways, or not and is really stuck)
ok so the fob is dead? just on this door?
and cant here the solenoid click>? at that cargo hatch?
did you check the child lock outs switches.??????????

lost the operators guide. on that.>?
say so and can post the page. you lost.

How are you trying to open the door , button on key fob ? With this system you can pull up on the drivers handle an it activates Antennas in the external side door handles (C30/C70 front doors, S40/V50 rear doors)

Antennas in the passenger compartment and cargo compartment

An antenna in the rear bumper

Quick lock motors in the lock units in the side doors

The remote keyless entry (RKE) receiver receives a signal from the key

The switch in the clutch pedal (manual transmissions) or a signal from the brake pedal switch via the central electronic module (CEM) (automatic transmissions)

Key-in switch.

Switch in door handle and lock button on handle .
If a door handle is pulled outward, a switch closes that wakes up the system and activates the antennas in the handles on the side where the handle has been pulled out. If a valid key is within a radius of approx. 1.5 metres from the handle, the relevant door will open and the vehicle will unlock one or several doors. Which doors are unlocked depends on the settings for the system. The vehicle can also be unlocked if the handle is affected on the tailgate.

best place will be from a wreckers that handles your make of vehicle.

Please see enclosed video.

Power Door Locks Circuit Description
The power door lock system incorporates door lock switches on both front doors and on the RH D-pillar, door lock motors in all passenger doors and in the RR cargo door, a door lock relay and a door lock control module.
Power for the door lock switches and the door lock control module is supplied from the CIG LTR fuse 13 through CKT 640 (ORN). Power for the door lock relay is supplied from the PWR ACCY circuit breaker through CKT 540 (ORN). Ground for the door lock relay is supplied from G202 through CKT 150 (BLK) and ground for the door lock control module is supplied from G400 through CKT 150 (BLK).
The door lock motors are reversible and both sides are connected to the normally closed contacts of the door lock relay. Those contacts of the relay are connected to G202. When any of the door lock switches are placed in the lock position, voltage is supplied through CKT 195 (LT BLU) to the relay lock coil. Since the other side of the lock coil is connected to ground, the coil is energized and it pulls the lock contacts closed. Voltage is then supplied through CKT 295 (GRY) to all the door lock motors and the doors lock. The unlock function operates in much the same manner except that when any of the switches are placed in the unlock position, voltage is supplied through CKT 194 (WHT) to the unlock coil of the relay and CKT 294 (TAN) supplies voltage to the apposite side of the door lock motor and the doors unlock.
Door Lock Control Module Description
The door lock control module is used on vehicles equipped with cargo doors. The purpose of the module is to lock the cargo doors after a lock cycle has been commanded from any of the door lock switches with the cargo doors open. When the RH cargo door is open, the module receives a ground signal from the closed contacts of the rear door jamb switch on CKT 1897 (ORN/BLK) to G400. When a lock command is received, the module retains this input until it receives an open input from the rear door jamb switch. Then the module sends a lock command through CKT 194 (WHT) to the door lock relay and the doors lock.
Rear Cargo Doors Description
The power door lock motor will not operate unless the rear cargo doors are fully closed. The power door lock motor is in the right cargo door. The contactors are on the rear cargo door opening on the body and on the right cargo door.

It could just be stuck. Try picking up a can of WD40 and spraying it in the lock and up underneath the handle into the mechanism. Then work the handle back and forth and see if this helps. A lot of times road grime will get in there and gum up the works. Also, try not to get WD40 on the paint, if you do then wipe it off immediately and it wont hurt it any. Hope this helps!

possibly it still thinks a door is open check out rear cargo door switch this is usually the culprit because its seperate from the rest of the doors. turn on rear cargo light to doors ,make sure it works then shut rear cargo door and see if light is still on. if light is still on theres your problem.
look at switch usually they get dammaged/distorted over time.

I have the same problem with a 2001 Mitusbishi Montero XLS. Door handle is stuck and feels mushy when trying to open it. Is there a safety from the inside panel to open the cargo door? At this point, until its repaired, all I want to do is to be able to release the lock and open the door.

Check this information abour DOOR LOCKS: ZJ-Secc-8P-Power-Door-Locks

Good luck!!!