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Panic button failure

Carlo
Posts: 15
Joined: Sun Mar 17, 2019 10:30 pm
Location: Olbia, Sardinia, Italy

Panic button failure

Postby Carlo » Mon Mar 18, 2019 6:22 pm

Hi, unfortunately in my car the panic button in the console does not work. The central locking works very well in all others functions (from interior, external, windows closing, trunk remote control). I don't have an alarm system.
What could be the problem? Is there a procedure to unlock it?
Thank you very much to all those who want to help me.
Regards
Carlo

Carlo
Posts: 15
Joined: Sun Mar 17, 2019 10:30 pm
Location: Olbia, Sardinia, Italy

Re: Panic button failure

Postby Carlo » Wed Mar 20, 2019 8:13 pm

Problem solved! After 4 hours of work as a mechanic who has dismantled so many things without finding anything, I suggested to disconnect and reattach the battery ...
The button works again !!! after almost two years ...

:o :oops: :twisted:

naki_k
Super Moderator
Posts: 28898
Joined: Sun Feb 21, 2010 9:25 pm
Location: Kirton, nr Boston, Lincolnshire

Re: Panic button failure

Postby naki_k » Thu Mar 21, 2019 2:11 pm

Nice simple fix for a change.
That button normally works. Mits the central locking that normally lets go on the pre 93 models.
88 3.6 XJ6 PDH/CEM
90 Range Rover Vogue SE 3.9 V8 LPG
91 4.0 XJ6 Manual
92 4.0 XJR Manual
92 4.0 XJR
93 3.2s - 4.0 Manual conv
93 4.0 Sovereign
93 6.0 XJ81 DD6 x2
93 6.0 XJ81 XJ12
94 4.0 XJR
94 4.0 Daimler
96 4.0 X306 XJR
96 4.0 X300 D6
97 4.0 X300 Sport Manual
2000 LR Discovery ES TD5 A
Breaking 40/ 300

Carlo
Posts: 15
Joined: Sun Mar 17, 2019 10:30 pm
Location: Olbia, Sardinia, Italy

Re: Panic button failure

Postby Carlo » Thu Mar 21, 2019 2:24 pm

Bad surprise this morning ... :evil:
The button no longer works. At this point I really don't understand. Could it be related to the after market alarm that the first owner had installed? Are there other control units besides the one under the glove box (LHD)?
Thank you so much.
Carlo

naki_k
Super Moderator
Posts: 28898
Joined: Sun Feb 21, 2010 9:25 pm
Location: Kirton, nr Boston, Lincolnshire

Re: Panic button failure

Postby naki_k » Thu Mar 28, 2019 1:16 am

These buttons are usually reliable.
The obvious thing would be to try a replacement part. The button itself may be intermittent/ faulty?
88 3.6 XJ6 PDH/CEM
90 Range Rover Vogue SE 3.9 V8 LPG
91 4.0 XJ6 Manual
92 4.0 XJR Manual
92 4.0 XJR
93 3.2s - 4.0 Manual conv
93 4.0 Sovereign
93 6.0 XJ81 DD6 x2
93 6.0 XJ81 XJ12
94 4.0 XJR
94 4.0 Daimler
96 4.0 X306 XJR
96 4.0 X300 D6
97 4.0 X300 Sport Manual
2000 LR Discovery ES TD5 A
Breaking 40/ 300

Carlo
Posts: 15
Joined: Sun Mar 17, 2019 10:30 pm
Location: Olbia, Sardinia, Italy

Re: Panic button failure

Postby Carlo » Thu Mar 28, 2019 3:03 pm

The auto electrician has verified (maybe) that the button works. There is probably a problem between the button and the control unit.
He says that to understand and repair the fault it is necessary to disassemble the whole dashboard. I don't want, for a small problem, to risk breaking something else.
Are there other intermediate control unit?

naki_k
Super Moderator
Posts: 28898
Joined: Sun Feb 21, 2010 9:25 pm
Location: Kirton, nr Boston, Lincolnshire

Re: Panic button failure

Postby naki_k » Fri Mar 29, 2019 11:26 am

Carlo wrote:The auto electrician has verified (maybe) that the button works. There is probably a problem between the button and the control unit.
He says that to understand and repair the fault it is necessary to disassemble the whole dashboard. I don't want, for a small problem, to risk breaking something else.
Are there other intermediate control unit?


The central microprocessor controls all the internal electronics.
But also the central locking relay/ module is linked with the panic button.
Try unplugging/ plugging it back in. It may just be a poor connection, that can be reset? Free and easy, so it’s worth a try.
88 3.6 XJ6 PDH/CEM
90 Range Rover Vogue SE 3.9 V8 LPG
91 4.0 XJ6 Manual
92 4.0 XJR Manual
92 4.0 XJR
93 3.2s - 4.0 Manual conv
93 4.0 Sovereign
93 6.0 XJ81 DD6 x2
93 6.0 XJ81 XJ12
94 4.0 XJR
94 4.0 Daimler
96 4.0 X306 XJR
96 4.0 X300 D6
97 4.0 X300 Sport Manual
2000 LR Discovery ES TD5 A
Breaking 40/ 300

katar83
Posts: 2912
Joined: Tue Aug 23, 2011 11:17 am
Location: Cambridge

Re: Panic button failure

Postby katar83 » Fri Mar 29, 2019 12:37 pm

Carlo wrote:The auto electrician has verified (maybe) that the button works. There is probably a problem between the button and the control unit.
He says that to understand and repair the fault it is necessary to disassemble the whole dashboard. I don't want, for a small problem, to risk breaking something else.
Are there other intermediate control unit?


They just wanted to get rid of you, you need to find a proper auto eletrician to diagnose it and show him this:

Image

It's very simple thing, basically just a switch which either provides a high or low signal to locking module on grey/green wire. You just need to check for continuity on that cable from switch to plug, see at what state that signal is and whether changing it locks the system or not. If it does then you have an issue within the switch itself or ignition switch which provides the ground, if it doesn't then module is faulty. No need to tear the whole car apart ;)
1996, 3.2 SWB X300 - Finally a rust free daily driver :)
1997, 4.0 LWB X300 - Unlucky car.
1988, 3.6S XJS - Never ending restoration project.
1994, 3.2S X300 - Accident damaged, October 2015. Gone!
1994, 3.2S XJ40 - Long gone.

Carlo
Posts: 15
Joined: Sun Mar 17, 2019 10:30 pm
Location: Olbia, Sardinia, Italy

Re: Panic button failure

Postby Carlo » Thu Apr 04, 2019 8:18 pm

katar83 wrote:
They just wanted to get rid of you, you need to find a proper auto eletrician to diagnose it and show him this:

This is what I did but unfortunately it didn't help. :cry:
I'll try another electrician ...
Thanks

naki_k
Super Moderator
Posts: 28898
Joined: Sun Feb 21, 2010 9:25 pm
Location: Kirton, nr Boston, Lincolnshire

Re: Panic button failure

Postby naki_k » Wed Apr 17, 2019 1:52 pm

Carlo wrote:
katar83 wrote:
They just wanted to get rid of you, you need to find a proper auto eletrician to diagnose it and show him this:

This is what I did but unfortunately it didn't help. :cry:
I'll try another electrician ...
Thanks


I have a spare panel if you want to try one. Probably cheaper than 30 minutes of labour charge. PM for details.
88 3.6 XJ6 PDH/CEM
90 Range Rover Vogue SE 3.9 V8 LPG
91 4.0 XJ6 Manual
92 4.0 XJR Manual
92 4.0 XJR
93 3.2s - 4.0 Manual conv
93 4.0 Sovereign
93 6.0 XJ81 DD6 x2
93 6.0 XJ81 XJ12
94 4.0 XJR
94 4.0 Daimler
96 4.0 X306 XJR
96 4.0 X300 D6
97 4.0 X300 Sport Manual
2000 LR Discovery ES TD5 A
Breaking 40/ 300


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