Jump to content


Rear doors/locking


Billy Beatnik
 Share

Recommended Posts

Hi

Just recently my two rear doors will not lock or unlock with the remote, I have to push the button on the inside to lock or unlock. No problems with front doors and everything else works fine, no battery issues either. Anyone have any ideas?

Thanks

Ste

Link to comment
Share on other sites

Hello, Watching the replies to this.  I have that problem with one door and it is because the motor unit has failed.  Apparently it is quite a common problem.

Link to comment
Share on other sites

Hi.

Just to show how hard it is to diagnose without being hooked up to a diagnostic computer this is from a Jaguar Technical Training Manual: If you thought pressing the button just did one thing, think again......

 

Complex Network Functions

In addition to sharing information, multiplexing has enabled modules to work together to perform complex vehicle functions. The sequence below demonstrates how a network can complete a complex function such as Global Closing using shared logic. The following example depicts an X250 equipped with Passive Entry.

The sequence starts with an operator standing outside of the vehicle (all windows and sunroof open and doors unlocked) with a SmartKey within one meter of the driver’s door handle antenna.

1. Pressing the switch on the driver’s door handle provides a hardwired ‘lock request’ input signal to the keyless vehicle module (KVM).

2. Once the KVM receives the hardwired ‘lock request’ input signal, the KVM then transmits a low frequency (LF) signal to the driver door handle antenna which activates any SmartKey transmitter within one meter of the handle antenna.

3. The activated SmartKey transmits a radio frequency (RF) ‘security code’ signal which is received by the RF Receiver.

4. The RF Receiver transmits the ‘security code’ signal via a dedicated serial data line to the KVM, which checks and validates the security code.

5. Once the security code has been validated by the KVM, the KVM sends the ‘lock request’ signal to the CJB via MS CAN bus.

6. Upon receiving the ‘lock request’ signal, the CJB confirms that none of the latches are ‘ajar’ by monitoring the aperture ‘ajar’ switch signals, which are a direct hardwired input to the CJB.

7. Once it has confirmed that none of the latches are ‘ajar’, the CJB sends a ‘lock request’ followed by a ‘security request’ over the MS CAN bus.

8. Locking and Security Request Results – The front door modules receive the ‘lock request’ signal via MS CAN. The front doors lock. – The front door modules transmit the ‘lock request’ signal to the rear door modules via LIN bus to lock the rear doors. – The RJB receives the ‘lock request’ signal and inhibits the trunk and fuel door release. – Once the vehicle is locked, the CJB automatically enters security mode and sends a ‘security request’ signal over the MS CAN bus, and flashes the front side lights. – The front door modules receive the ‘security request’ signal via MS CAN and flash the side view mirror turn signal and approach lights. – The RJB receives the ‘security request’ signal and inhibits fuel pump driver module operation and flashes the tail lights. – The instrument cluster receives the ‘security request’ signal and activates the security LED in the sunload sensor on the dashboard. If the operator releases the lock button now, the car is locked and armed but the windows and sunroof are still open. By continuing to press the lock button for an additional three seconds, the following events occur:

9. The KVM is still receiving the hardwired ‘lock request’ signal from the driver’s door handle and sending it to the CJB via MS CAN. Once the CJB sees the ‘lock request’ signal for more than three seconds it will send an ‘all window close request’ signal over the MS CAN bus and a hardwired ‘all window close request’ to the sunroof module.

10.The front door modules receive the ‘all window close request’ and close the front windows and transmit the request via LIN bus to the rear door modules to close the rear windows.

 NOTE:

The windows and sunroof will only globally close if the anti-trap functionality has been enabled through window / sunroof initialization.

 

I am quickly coming to the belief that any electrical issues need to be diagnosed fully by someone who knows what they are doing with the appropriate diagnostic hardware/software before setting off on a course of replacing the obvious culprit part.....

John

Link to comment
Share on other sites

Thanks Guys,

Funnily enough, I know the rear drivers side was working until my son in law started messing about with the button on the door. If I can figure out what the previous message is saying I’ll try to see if I can get it all connected again.

Link to comment
Share on other sites

3 hours ago, Billy Beatnik said:

... If I can figure out what the previous message is saying I’ll try to see if I can get it all connected again.

Simply saying you may well need to hook up to a good diagnostic computer, and know what you are doing to sort it. These machines are very complicated and use multiple computers and sensors talking over several networks to perform what seems a simple function. The modules are sensitive to low voltage causing software problems so probs better to diagnose with the computer rather than chase possible "obvious" fixes.

John

Link to comment
Share on other sites



I had a similar problem with my 3.0D S. Both the front and rear passenger doors intermittently refusing to lock or open from outside. I replaced the latch assembly on both doors.  Quite expensive at around £150 each. The one for keyless entry has an extra motor. Requires quite a bit of stripping down of the door to replace. Window has to come out as well. Sounds worse than it is but takes a bit of time and fiddling!

Link to comment
Share on other sites

I'm having the same problem with my rear doors. But mine dont unlock or lock at all unless I manually press the lock of on both interior door handles. 

I've been told its something to do with the actuators? But not had it officially diagnosed yet.

Link to comment
Share on other sites

Hi

If it is both doors, and the problem did not develop with first one not working then the other it is unlikely to be 2 seperate faults, one on each door, probably a problem in the "computers" or modules.

John

Link to comment
Share on other sites

Hi all.

I have had the issue with the rear doors failing to lock/unlock, I have the keyless entry type of door locks.

First noticed on the nearside rear when I gave a friend a lift and, the door had to be unlocked manually, as the little lever did not active from the central locking system.

Shortly after that I started to notice the offside rear door not locking and unlocking intermittently, and after a while could only be locked from the inside pushing the little lever in.

I found online some replacement actuators after doing some checking to find out what the problem could be.

Here is a link https://www.ebay.co.uk/itm/232792541799 ,I ordered a left and a right side total charge £124.16 with postage.

I fitted them myself, the first one was a little tricky trying to work out what to do, the keyless entry electric connection stumped me for about 10 mins till I sussed out the workings of it, there is not a lot of room to view things and my failing close up eyesight is a pain in the rear end.

The second one was a doddle now I knew how it all went together, I did not have to remove the windows, though if I remember correctly I undid the bolts that secured the window motor to the mount and this gave enough room to get the door lock assembly out. It took probably an hour each side not rushing at all.

The new ones have been in and working with no issues since October 2019.

I took the old ones apart to be nosey and saw there are 2 small electric motors that operate the mechanisms. I had a look on Ali express and found replacement motors the code numbers are FC280 and FC130 there is 1 of each in the actuator, I bought 2 of each for less than £20 with postage, and have rebuilt the original door actuators ready for if/when they fail again.

Taking the actuators apart is fairly easy I guess, the motors are a push connection no soldering or anything like that, just take note of where everything goes and should be an easy fix.

I did a simple test on the old motors, just ran a 12v battery supply through them, 1 motor did not spin at all, 2 motors turned but not very well and, the last motor span fast and freely, so I think that confirmed the 3 motors had gone past their best.

Hope this helps regards Martin.

 

  • Like 1
  • Thanks 1
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
 Share




  • Join The Club

    Join the Jaguar Owners Club and be part of the Community. It's FREE!

  • Topics

  • Our picks

    • Simply Jaguar show at Beaulieu - Sunday 23rd June 2024
      Jaguar Owners Club have a stand at this year's Simply Jaguar event at the National Motor Museum at Beaulieu, Hampshire on Sunday 23rd June 2024

      Tickets are available online here: https://www.beaulieu.co.uk/events/simply-jaguar/
        • Like
      • 0 replies
    • JAGUAR’S LAST PETROL SPORTS CAR: F-TYPE ZP EDITION TAKES THE CHEQUERED FLAG
      Jaguar is commemorating the end of its internal combustion sports car lineage in 2024 with an exclusive limited-edition F-TYPE inspired by two iconic 1960s racing E-types

      Just 150 examples of the F-TYPE ZP Edition will be the last internal combustion-engined sports cars designed by Jaguar. These 575PS supercharged petrol V8 F-TYPEs feature specially curated interior and exterior details by the personalisation experts at SV Bespoke.
        • Like
    • UPDATE SHOW INFORMATION !

      Please find attached your club label – please can this be distributed amongst your club members prior to the event. Please ensure that they print this label and display it in their windscreen upon entry to the event, this ensures that all members wishing to park within your club area are directed to the correct parking location by our stewards. Please do not modify or add logos to the club label.

      We do ask that all individuals have purchased their tickets on an individual basis in advance via our website, to speed up the entry process on the day. This can be done on our website here until 2pm on the day when admission closes: https://www.beaulieu.co.uk/events/simply-jaguar.

      Note that we do have two entrances available, one is exhibitors gate at the bottom of the hill as you come in to Beaulieu, with the other being the normal Simply event entrance within the attraction. Either entrance is fine to use and both are open from 9.00am, with the exhibitors entrance closing around 11am.

      Jaguar Owners Club (1).pdf
    • Simply Jaguar - Beaulieu Motor Museum - 25th June 2023
      Jaguar Owners Club have a stand at this years Simply Jaguar event at the National Motor Museum at Beaulieu, Hampshire on Sunday 26th June 2023

      Tickets are available online here: https://www.beaulieu.co.uk/events/simply-jaguar/


      TICKETS & PRICES
      Participant prices are only valid if arriving in a Jaguar and taking part in the rally. They are not valid for those arriving on foot.

      Participants can make the most of our EARLY BIRD discount by booking before 28th February 2023.

      Children under 5 require a ticket, this can be booked online free of charge.

      Participant and visitor tickets will include entrance to the rest of the Beaulieu attraction, including the National Motor Museum, Palace House, Little Beaulieu, World of Top Gear, Beaulieu Abbey and its grounds and gardens.

      The best time for viewing the Simply rally is between 10am and 2pm.

       

       


      Adult


      Child




      Participants – Early Bird*


      £14.00


      £7.50




      Participants – Standard & On The Day


      £16.00


      £8.00




      Visitors


      Normal admission applies.


      Normal admission applies







      *Early bird tickets are available until 28th February 2023

      VEHICLE ENTRY
      Entry with your Jaguar is from 9am – 2pm. Please make sure you have your ticket printed or available on your phone, ready to be scanned on arrival.

      Please do not arrive early for our Simply rallies as no facilities will be open prior to 9:30am.

      Cars cannot leave and re-enter the grounds for the Simply rallies.

      ________________________________________________________________________________________________________________

      CLUB STAND ATTENDEE LIST

      We do ask for a final update on numbers 2 weeks prior to the event following which we will send out club labels to you via email for you to then distribute out to club members. Club members then need to print and display these in their windscreen on arrival. This helps us then park you all in your club area together.

      1. Trevor (admin)
      2.  Paj
      3.  
       
      • 5 replies
    • F-TYPE marks 75 years of Jaguar sports cars and its final model year update
      The Jaguar F-TYPE is the definitive Jaguar sports car from a rich bloodline spanning 75 years and including some of the most iconic models ever built
        • Like

×
×
  • Create New...



Forums


News


Membership