Power sliding door closes but will not latch therefore the door reopens. any ideas on how to get the door to latch?

The power sliding door (PSD) includes several interconnected electronic and mechanical components. Obtain a specific customer concern in order to efficiently diagnose and repair the PSD system. Begin diagnosis with a service writer. Ask the customer for as much detail as possible regarding the conditions under which a failure of the door was noticed. Always include the basic concern, such as "door reverses when closing". The following details might affect the performance of the PSD:
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Weather conditions, such as snow or heavy ice

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The van was parked on an incline.

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The van has been parked for a long time, which may cause a weak battery.

Refer to Power Sliding Door Customer Concerns for diagnosis. Verify that all of the mechanical components of the PSD are aligned and operating correctly before you begin diagnosis of the electrical system. The electrical components cannot operate correctly if the mechanical components are not operating correctly.
I just checked out a 1999 Oldsmobile Silhoutte yesterday , same set up there is a cable inside hooked to a motor that opens the door. The one yesterday had the cable hanging out the back of the sliding door , does yours ?
Does it open manually ? There are electronics involved , sensors ,switches , a module an a electric motor .
The power sliding door (PSD) includes several interconnected electronic and mechanical components. Obtain a specific customer concern in order to efficiently diagnose and repair the PSD system. Begin diagnosis with a service writer. Ask the customer for as much detail as possible regarding the conditions under which a failure of the door was noticed. Always include the basic concern, such as "door reverses when closing". The following details might affect the performance of the PSD:
?€¢
Weather conditions, such as snow or heavy ice

?€¢
The van was parked on an incline.

?€¢
The van has been parked for a long time, which may cause a weak battery.

Refer to Power Sliding Door Customer Concerns for diagnosis. Verify that all of the mechanical components of the PSD are aligned and operating correctly before you begin diagnosis of the electrical system. The electrical components cannot operate correctly if the mechanical components are not operating correctly.
The amount of force necessary in order to reverse the PSD depends on the position of the sliding door at the time of obstruction. The PSD action may not reverse if the following actions occur:

1. The PSD starts to close.
2. A gradually increasing force is applied on the sliding door in an effort to reverse the operation.

The PSD control module may interpret the gradually increasing resistance as a corrosive or dirty track. The PSD control module compensates for the gradual resistance on the sliding door by applying more power to the cable motor when closing the sliding door. In order to reverse the PSD at this stage of the sliding door travel, an abrupt and firm force is required.
The PSD control module operates in this manner in order to compensate for the wear over the life of the PSD. Over time the vehicle may experience the following conditions:
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A dirty track

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A corrosive track

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Ice build-up on the track (during cold weather)

The PSD control module is more sensitive to obstructions near the end of the sliding door close operation. The amount of force necessary in order to reverse the sliding door travel is less than when the sliding door started to close.
When the sliding door is within 2.5 cm (1.0 in) of the closed position, the door lock latch switch sends a signal to the PSD control module. The PSD control module determines that the sliding door is in the unlatched (ajar) position. This action causes the control module to apply full power to the cable motor in order to bring the sliding door to the fully closed (latched) position. The sliding door will close unless the force is greater than the cable motor at full power. The PSD control module de-energizes the cable motor and the clutch when the PSD control module receives a second signal from the door lock latch switch. The second signal indicates that the sliding door is fully closed and latched.
Power Sliding Door (PSD)
The power sliding door (PSD) provides built-in diagnostics. This assists the service technicians during troubleshooting.
The PSD has the following diagnostic capabilities:
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Diagnostic Trouble Codes (DTCs)

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Input/output tests

I jusatI

Two things happen. One the latch is already latched and therefore it's closed before the gate shut, When you try to close it you might notice that the door don't close all the way. This doe'snt have to be thwe case. the other thing that happens if the lock mechanism is working, You here it click? The latch is stuck as the opener is stuck. You might get lucky and spray the latch with Blaster or other rust buster type penatrant. Theres angles though the opening of the latch . Spray on several angles and repleatly close the door trying to vibrate the Penatrant into the stuck area. Looking at the latch use a screw driver to move the latch and see if you can cycle it though it's positions to see if you can latch and unlatch it with the tool and reopen by pullung the handle ( you may need to try ther inside handle too and even the remote openner if you have one. Ussaaaly you need to push the button twice to open the rear hatch so it may take a few trys and spraying to get it to come loose.. Some vehicals stay closed a long time and stuck is the way to think.. But if the door is used often the linkage inside the door mayh have come off the the latch is closed and the linkage doesn't open the laTCH AND THE THING MANAGED TO GET CLOSED WITHT THE DOOR OPEN.

Check for something blocking the upper or lower track. the door is equipped with a sensor that senses that there is something preventing the door from closing and causes the door to reopen.

the door is out of adjustment. you could also have something bent. those are very heavy doors and I would recommend to take it to a honda dealer only for repairs. I helped a gentleman in your exact same situation and it took a 20 year tech all day to get it right.

My van Started doing this exact same thing today same year, model, have you found a solution yet?

If you look at the door where the latch is it is probably closed. You need to take a screwdriver and insert it in the closed part lift you're door handle and pull on the screw driver to reopen the latch.

replace the door latch

Please check the aft track roller assembly. It is easiest to inspect from the rear of the van looking forward when the door is open. You'll see the rear hinge assembly clearly. The track rollers cannot be seen but you can pull outboard on the rear edge of the door--the door should not move outboard more than 1/8 of an inch. If it moves out more than this or feels sloppy, suspect damaged/missing track rollers. This will cause the hinge to chatter in the track and "jolt". It will also cause the door to misalign during the close phase preventing the close motor from properly engaging.
Replacing this part is no easy task but doable if you are good with cars. Check back here for more details if you want to try it, otherwise get a competent mechanic or the Honda dealership to do it.

U will need to buy a can of spray white grease and clean and then lubricate all the tracks the door channels on as well as all the latches for the door, this will cure the issue in most cases, did allot of these while working at a Ford dealer.

I think you have a latch issue or a latch release issue, pull the door panel and try and release the door latch, pull the latch and try to see what if anything is wrong with it, also make sure the linkage going to the latch from the release handle is hooked up or not otherwise damaged.