My 2015 Yeti 2.0 TDI SE Business has developed its first real issue since I bought it in 2018.  

 

I discovered late yesterday that the doors weren't locking via the key fob, nor will they lock by using the key in the drivers door.  The boot and the fuel flap DO lock and unlock as normal, the boot on the second press of the fob button, as set up. 

Additionally none of the windows work from either the fob, the drivers door buttons or the button on the other three doors. 

 

The battery is about 18 months old, and is well charged.  The car is always attached to a CTEK charger when not in use. 

I've check fuse 23 for the central locking but that was OK.  I removed and refitted it just to make sure the terminal were clean.  

I checked all the fuses in the under bonnet fuse panel but not the relays.  All the fuses were OK. 

 

I've done a scan with VCDS and got this:

 

01-Engine -- Status: OK 0000
02-Auto Trans -- Status: Malfunction 0010  No comms with front distance sensor.  One isn't fitted so ignore. 
03-ABS Brakes -- Status: OK 0000
04-Steering Angle -- Status: OK 0000
08-Auto HVAC -- Status: Malfunction 0010 13701488 + 13701504 + 13701520 + 13701536  All say: function restricted due to missing messages.  I don't think the HVAC has been working properly for a while so query  connected to door locking. 
09-Cent. Elect. -- Status: Malfunction 0010 01331 + 01332 + 01333 + 01334  No comms with all four door modules.   00927 terminal 30 (Right) open circuit intermittent
10-Park/Steer Assist -- Status: OK 0000
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: Malfunction 0010  13639168 Function restricted due to missing messages
19-CAN Gateway -- Status: Malfunction 0010  01771 + 01331 + 01332 + 01333 + 01334  No comms to Headlight Range module and all four door modules
22-AWD -- Status: OK 0000
25-Immobilizer -- Status: OK 0000
42-Door Elect, Driver -- Status: Cannot be reached 1100
44-Steering Assist -- Status: OK 0000
46-Central Conv. -- Status: OK 0000
52-Door Elect, Pass. -- Status: Cannot be reached 1100
55-Headlight Range -- Status: Cannot be reached 1100
5F-Information Electr. -- Status: Malfunction 0010  Ignore this as I've removed the antenna
61-Battery Regul. -- Status: OK 0000
62-Door, Rear Left -- Status: Cannot be reached 1100
72-Door, Rear Right -- Status: Cannot be reached 1100

 

Since mine is a facelift model there should not be a problem with the wires between the driver's door and the A pillar; and the faults suggest something common to all four doors.  Terminal 30 (Right) sounds worthy of investigation but I don't know what or where that is. 

I don't understand the "missing messages" faults either.  Could the common thing be a relay?  

 

Any help, appreciated. 

I'd still be checking the door wiring first.

1 hour ago, bryetian said:

Since mine is a facelift model there should not be a problem with the wires between the driver's door and the A pillar

 

Seriously?

 

It would definitely be my first port of call.

 

The HVAC is unlikely to be connected, you can check the compressor shut down code in VCDS, probably low refrigerant pressure.

Since I couldn't find anything else I have looked at the driver's door wiring and can't find any sign of broken wire(s) .

 

I've checked all the large under bonnet fuses and checked that the single relay works. 

 

 

Fixed it.  

I went through the dashboard end fuse box again.  Removed every fuse, cleaned the 'legs' and replaced each one several times to clean the fuse panel contacts.  Fuse 30 for the lighter sockets was missing so I replaced that one. 
And that was job done.  All the doors lock and all the windows work. 

 

Seriously, it wasn't the door wiring!  

So the question is now, how did it all work before the fuse was replaced and who removed the fuse?

8 hours ago, DogBook said:

So the question is now, how did it all work before the fuse was replaced and who removed the fuse?

I don't believe that the missing fuse was the problem.  I've never used the lighter sockets in the 6 years I've owned the car and never noticed the missing fuse before.  I plug the CTEK charger into the boot socket and that comes off a different fuse. 

 

Ross Tech Wiki  http://wiki.ross-tech.com/wiki/index.php/00927  for fault code 00927 (terminal 30) says that possible causes are "electrical path issues".   It also notes that possible symptoms include exterior lights inoperative.  I did check the lights which were all working hence my working on both fuses boxes as the possible weak link in the electrical path - accepting that no wires were broken. 

I think the cause was a bad contact on a fuse, not sure which one, and cleaning the contacts restored the electrical path.  Either way, the door locks and windows are working again and I have lots of fault codes to delete - sometime.

I may even try to get the tear drop function to work on the front wipers.

Terminal 30 simply refers to anything that is a permanent 12V connection.

 

3 hours ago, Breezy_Pete said:

Terminal 30 simply refers to anything that is a permanent 12V connection.

 

Thanks.  I did eventually work that out during my investigations.  

On 04/02/2025 at 07:16, bryetian said:

I don't believe that the missing fuse was the problem.  I've never used the lighter sockets in the 6 years I've owned the car and never noticed the missing fuse before.  I plug the CTEK charger into the boot socket and that comes off a different fuse. 

 

Ross Tech Wiki  http://wiki.ross-tech.com/wiki/index.php/00927  for fault code 00927 (terminal 30) says that possible causes are "electrical path issues".   It also notes that possible symptoms include exterior lights inoperative.  I did check the lights which were all working hence my working on both fuses boxes as the possible weak link in the electrical path - accepting that no wires were broken. 

I think the cause was a bad contact on a fuse, not sure which one, and cleaning the contacts restored the electrical path.  Either way, the door locks and windows are working again and I have lots of fault codes to delete - sometime.

I may even try to get the tear drop function to work on the front wipers.

Oh good, Ive seen this many times on the Vectra C side of things. Just replacing fuses that test and look perfect but that are many years old has cured a lot of issues. Maybe down to the fact these are all ran off computer module centres and not old fashing fuse and relay boxes. In fact my current Vectra VXR Ive had for 9 years now so maybe I should change the 2 or 3 normal trouble causing fuses in the BCM 😁👍

I think the "No comms with all four door modules." may have been a clue that it wasn't a door harness.

1 hour ago, KiNeL said:

I think the "No comms with all four door modules." may have been a clue that it wasn't a door harness.

It was.