RRS - Upper Tailgate Unlocking on Start

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Originally Posted by garrycol

... and sometimes you can hear the servo trying to lock the tailgate without success.

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When can this noise be heard? By my reckoning the servo only opens (not locks/unlocks) so is it actually trying to open at other times?

Graeme on the lower section of the Sport(not early MY's tho') tail gate they have a motor that, to a point, auto closes (or pulls the tail gate closed) & maybe that's what Gary can hear?

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Originally Posted by Fitzy2011

My vehicle is setup for all the doors to lock once it gets up to a couple of klms an hr, is it possible it is trying to lock with all the other doors and is opening instead?? Just a wild guess!!

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No the car does not have to be moving for the rear upper tailgate to unlock- my car is not set up for auto locking at the moment.

On this line I have found a way to stop the rear gate unlocking - when the ignition is turned on but the engine not started if you lock the doors via the switch on the dash the rear door does not unlock even when the doors are unlocked via the dash switch.

Doesn't fix the issue but makes it livable.

Garry

Quote:

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Originally Posted by sniegy

Graeme on the lower section of the Sport(not early MY's tho') tail gate they have a motor that, to a point, auto closes (or pulls the tail gate closed) & maybe that's what Gary can hear?

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IIRC Garry's is an early one.

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Originally Posted by Graeme

When can this noise be heard? By my reckoning the servo only opens (not locks/unlocks) so is it actually trying to open at other times?

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When the door has unlocked it then continues to continue to try to unlock itself at intermittent intervals. But as I indicated above if I have locked the doors via the dash switch the tailgate door does not unlock at all.

Garry

Does the glass open using the switch? If not or only sometimes then that could indicate a short further up the wire towards the BCU.

Quote:

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Originally Posted by garrycol

But as I indicated above if I have locked the doors via the dash switch the tailgate door does not unlock at all.

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That's a standard feature so that no-one can open the back when stopped in traffic.

Quote:

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Originally Posted by sniegy

Graeme on the lower section of the Sport(not early MY's tho') tail gate they have a motor that, to a point, auto closes (or pulls the tail gate closed) & maybe that's what Gary can hear?

Sent from my iPad using Forum Runner

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No it is the top latch - I pulled the little motor out of it and can see the motor running at intermittent intervals for about a second or so each time - the pulse to run the motor is coming from somewhere but not sure if this is a result of the relevant computer not getting getting correct signal back or is just a stray pulse being generated by the system - can happen up to 60 secs after start.

Its looking to me to be a short in the harness from the top door. I expect there's a connector just inside the rear somewhere (LHS?) from which the switch wire (pink with slate trace if same as early D3) can be removed to confirm or disprove the short. The D3 has 2 connectors between the switch and the bcu with the wire in pin 7 of one and pin 20 of the one closer to the BCU.

Quote:

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Originally Posted by Graeme

Does the glass open using the switch? If not or only sometimes then that could indicate a short further up the wire towards the BCU.

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The upper tailgate opens by the fitted latch or the key fob as it is supposed to - it does stay closed when pushed closed when the engine is off but just does not stay closed when the engine fires up. With the engine then running the rear upper door can be closed and sometimes it stays latched and some times it doesn't.

Also today when it has stayed latched and the engine is switched off it has started unlatching itself but when relatched it stays latched until the engine is started.

It is all so confusing and is starting to do my head in :confused: