Testing Rear Hatch Handle

dostin : Hi.

I apologize if you already know this stuff, but here's the thing about how the rear hatch lid works on a mk7/mk7.5 - it's ALL managed by what OBD11 calls the central electrics module via a 2 x part process that functionally separates "output" and "input". By this, I mean that  the module separates the "outlet" which is the actual lock mechanism and the "input" which is the manual switch that's located inside the VW emblem. This separation happens via different pins onto which the wires for these 2 x functions are terminated on the module

So, when you say "I was able to test the latch mechanism in the 09 - Central Electronics module"  - you actually confirmed that the "output" part of the process was operating correctly (which was an excellent step in your diagnostics process). However, this test does NOT investigate if the "input" function is operating correctly

Here's how the "input" circuit for the hatch switch is wired on a RoW mk7.5

J519 is the central electrics module

THK is the coupling point on rear lid - I've not shown the pin numbers on THK because this varies according to the drive side

As you can see - it's a very simple circuit. For the "input" part of hatch unlocking, J519 senses when the voltage potential on pin#32 (socket A) falls to zero. When this happens - J519 activates the "output" function.

 I'm guessing of course and anything is possible when attempting remote diagnostics on a forum - but likely fail-points could be wire continuity and/or the integrity of the terminations en-route to the module.

Don

PS: I'm assuming in the above discussion that your problem is NOT coding related - did you make any coding changes (look at your History records)?