Thread: RRS - Upper Tailgate Unlocking on Start

Is your key FOB button set to unlock the upper or lower tailgate? You might try using the other key.

Cheers,

Gordon

Originally Posted by gghaggis

Is your key FOB button set to unlock the upper or lower tailgate? You might try using the other key.

Cheers,

Gordon

Already thought of that - one key is set for the tailgate and the other for headlights on, so tried both keys and it does it with both.

Thanks

Garry

The RRS UK forum suggested that the upper tailgate latch could have corrosion so causing the problem.

I have had a good look at this today - the actual switch seems OK and even with the switch disconnected the actual lock disconnects up to 60 secs after engine start. There is an electrical pulse coming through the system unlocking the upper tailgate between 1 and 60 secs after engine start.

I removed the actual lock and removed the little electric motor - with only the electric motor connected it runs for about 1.5 secs up to 60 secs after engine start so it is the car that is telling the lock to unlock. I did a hard reset of the car's computers with no change. I read the codes and found two general electrical faults and signal faults. I cleared these and then recycled the tailgate lock and started the engine - the fault came back but no fault codes were logged in the system.

So at this time I am at a loss what the issue is. I tried closing the top tailgate and disconnecting it at the connector with the intention of just using the complete tailgate but disconnecting the top tailgate electrically also disables the bottom tailgate so no access to the cargo area.

Ideally I would like to try a new lock but there is no where I can get access to one without buying one ($120), so not prepared to do that just yet in case it does not fix the issue.

Other ideas would be appreciated.

Garry

Originally Posted by garrycol

Already thought of that - one key is set for the tailgate and the other for headlights on, so tried both keys and it does it with both.

Have you tried the other fob?

Originally Posted by garrycol

I have had a good look at this today - the actual switch seems OK and even with the switch disconnected the actual lock disconnects up to 60 secs after engine start. There is an electrical pulse coming through the system unlocking the upper tailgate between 1 and 60 secs after engine start.....
Ideally I would like to try a new lock...

As it happens with the switch disconnected, a different lock wont help.

Originally Posted by Graeme

As it happens with the switch disconnected, a different lock wont help.

Don't quite follow. The UK site indicated that that the switch can get corrosion in it and cause the issue but if the lock is removed from the circuit and the latch still opens when a pulse comes from the car maybe the latch is faulty and responds in the incorrect manner when the computer sends a pulse through on/after start.

That is the other aspect that has me baffled is to why the car sends a pulse through on start to up to 60 secs after start. It is not to test if the door is open as there is another way of doing that I have not sussed - with the latch closed and the hatch open the tailgate open message does pop up.

All very confusing - looks like I will have to do what the stealers do and that is replace parts one by one and then find that it is not a hardware issue but a software issue but still charge the client for the not needed parts.

I did ask the dealer yesterday if I could try a new latch first but the response was "you try you buy".

Garry

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!!

Sounds like something is shorting to earth, causing the lid to open. Check the wiring in the tailgate lids & see how goes it!