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#538505 - 21/10/18 02:38 PM Workshop Note: Immobiliser C.2016...........
DaveW Offline
Roadster Guru
Member of the Inner Circle

Registered: 11/12/08
Posts: 17424
Loc: South Yorkshire
Last Wednesday I went to start the Plus 4 and the immobiliser light didn't go off when I clicked the ignition on. I knew the battery could do with a charge, so I charged it up overnight. The following day it started normally so I put this down to voltage sensitivity.

Yesterday, I wanted to fill the tank,so jumped in expecting a start, and the immobiliser light didn't go out.

So I removed the cowl to examine the sensor ring which surrounds the ignition lock barrel. This ring has a scientific name but rather than guess I'll call it the sensor ring. It detects the sensor which is buried inside the plastic part of the key. If you look carefully on the metal key side of the black plastic the location of the key sensor is visible as a filled hole.

The sensor ring around the lock barrel is secured by a neoprene spacer. Almost like I've been there before! I moved the sensor ring outwards, and the car started. It was a bit nail biting at the filling station but it started OK.

When we got back home I tried again and it wouldn't start............ frown2

So I consulted my Guru..........

The distance between the key and the detector ring is critical to probably within 1mm or less.

He's had a couple of Morgans in recently in the "18 months old to two years old range" with this issue.

The trick is to get the detector ring as close as possible to the key handle...............

This is how it comes from the Factory. The lock barrel is wrapped with standard density self adhesive neoprene. Around that to prevent the ring slipping inwards is a thin strip of neoprene. If your cowl is leather wrapped, the leather adds additional distance between the ring and key.



The next image is a bit clearer. The wiring from the sensor is a bit tight, but can be eased out from the cable tie buried under the dashboard.



The black plastic cover pulls off the lock barrel which makes removing the original neoprene much easier.........
The detector ring is upper left.



This is the DW solution. High density neoprene and with the securing ring held with a cable tie.
Refitting the cowl is tedious. I reduced the overlap of leather to try and reduce the thickness around the lock barrel. First time didn't work so I had to go back in and space the ring a little further out at the top.



If you ever get caught where the immobiliser light won't go out, wipe the black plastic part of the key around the lock barrel, and you'll have about twenty seconds to insert the key and start the engine after the light goes out!!!

Three starts later it looks promising, but who knows!! thumbs
_________________________
DaveW
2005 Corsa Red Roadster S1
2016 Saffron Yellow (Narrow) Plus 4

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#538511 - 21/10/18 03:48 PM Re: Workshop Note: Immobiliser C.2016........... [Re: DaveW]
jimmyw Offline

L - Learner Plates On

Registered: 01/03/15
Posts: 190
Loc: Perthshire Scotland
This problem could occur on a 4/4 and because the warning light is not visible diagnosing the non starting would be difficult .
_________________________
Jimmy
2015 4/4 Sport Green

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#538513 - 21/10/18 04:10 PM Re: Workshop Note: Immobiliser C.2016........... [Re: DaveW]
milligoon Offline
Talk Morgan Addict

Registered: 20/04/14
Posts: 3055
Loc: Dorset, UK
Can't recall having such distance critical issues after having it apart several times in the roadster when I was chasing a sluggish starting issue (key wiring to relay) are they different? Only have the naked plastic cowling in mine though.
_________________________
Mark - driving
Archie the Old English Sheep Mog...........
2010 Roadster 3.0 V6 (S3) wink

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#538517 - 21/10/18 04:26 PM Re: Workshop Note: Immobiliser C.2016........... [Re: jimmyw]
DaveW Offline
Roadster Guru
Member of the Inner Circle

Registered: 11/12/08
Posts: 17424
Loc: South Yorkshire
Originally Posted By jimmyw
This problem could occur on a 4/4 and because the warning light is not visible diagnosing the non starting would be difficult .


At least the starter doesn't turn, the immobiliser is almost too good!
_________________________
DaveW
2005 Corsa Red Roadster S1
2016 Saffron Yellow (Narrow) Plus 4

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#538534 - 21/10/18 07:54 PM Re: Workshop Note: Immobiliser C.2016........... [Re: DaveW]
smudger1 Offline
L - Learner Plates On

Registered: 20/05/09
Posts: 175
Loc: Durham, UK
I had a similar problem which proved to be dry soldered joints in the spider unit behind the dash.
_________________________
1999 Morgan Plus 8. 3.9 ....
1961 Alvis TD21 Series1 3 Litre Auto....

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#538542 - 21/10/18 08:58 PM Re: Workshop Note: Immobiliser C.2016........... [Re: DaveW]
Biglewey Offline
Just Getting Started

Registered: 22/10/17
Posts: 33
Had similar problem with my 2015 plus 4. No warning light but just would not start. Not wanting to bugger things up took to dealer who knew it could be an issue. Sorted it and not been a problem since. He said coil location had to be just right.


Edited by Biglewey (21/10/18 08:59 PM)

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#538601 - 22/10/18 12:19 PM Re: Workshop Note: Immobiliser C.2016........... [Re: DaveW]
Bervie1 Offline

Just Getting Started

Registered: 05/05/18
Posts: 91
Loc: Angus, UK
“So I consulted my Guru..........”

You mean there is a higher grade of Guru than DaveW!!!

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#538608 - 22/10/18 01:36 PM Re: Workshop Note: Immobiliser C.2016........... [Re: Bervie1]
DaveW Offline
Roadster Guru
Member of the Inner Circle

Registered: 11/12/08
Posts: 17424
Loc: South Yorkshire
Originally Posted By Bervie1
“So I consulted my Guru..........”

You mean there is a higher grade of Guru than DaveW!!!


Indeed there is! The trick is knowing who will know!!!!
guru
_________________________
DaveW
2005 Corsa Red Roadster S1
2016 Saffron Yellow (Narrow) Plus 4

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#538621 - 22/10/18 03:34 PM Re: Workshop Note: Immobiliser C.2016........... [Re: DaveW]
bmgermany Offline
Learner Plates Off!

Registered: 15/08/14
Posts: 471
Loc: Northern Germany
Originally Posted By DaveW
Originally Posted By Bervie1
“So I consulted my Guru..........”

You mean there is a higher grade of Guru than DaveW!!!


Indeed there is! The trick is knowing who will know!!!!
guru
.

I don' have to know everything - to know whom I can ask is enough!
_________________________
2005 1800ccm 4/4 and a lot of HONDA CX500.......

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#538623 - 22/10/18 04:04 PM Re: Workshop Note: Immobiliser C.2016........... [Re: DaveW]
Stewart S Offline
Wave & smile... It's a Morgan
Member of the Inner Circle

Registered: 14/06/14
Posts: 10590
Loc: Lancashire, England
How annoying
I know of two Mog owners just recently that have had problems with not starting down to the immobiliser
_________________________
2008 Bugatti Blue Roadster 4 Seater

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