1997 disco 1 nas becm immobilizer question

[joeblack5]

Hi folks,
I located a relative rust free 1997d1 auto. 125000 miles. It is not running, that is , the starter does not crank over.

Some one has removed the radio and cut some wires at the passenger foot well. Looks the green imobilizer is cut out and gone
Under the steering column some loose wires as well.

With a good battery the dash light comes on and I have fuel pressure.
But no crank.

The car sat for several years.

My questions.

What signal is required to the gems pin26 ECU to bypass so that I can start the engine?

Does the 1997 /1998 nas model have a becm.

Thank you.

Johan

 

[p m]

Does the 1997 /1998 nas model have a becm.

no.
But I don't know the answer to the first question.

 

[joeblack5]

Thank you, I am trying to sort thru the diagrams with the immobilizer and how that communicated with gems ECU. Maybe it is easier to convert the gems to cux?

 

[p m]

Thank you, I am trying to sort thru the diagrams with the immobilizer and how that communicated with gems ECU. Maybe it is easier to convert the gems to cux?

no, GEMS is far superior to 14CUX. Don't do it.

 

[robertf]

it wont start without the alarm talking to it, immobilized or not.

 

[joeblack5]

Thank you, so I guess the person who cut out the wiring and green box basically disabled the car forever?

 

[robertf]

you could patch in a junkyard harness and alarm then pair it to the existing ecu

 

[special ed]

Try this, might work might not.

Black with red/orange stripe wires on the harness to the green box (missing in your case) there are 2 of the same color wires. Connect them together and should allow the engine to crank, Note that also you can just jump the starter from the battery cable to the trigger wire on the solenoid and it will bypass all of that and crank the engine over. Key on of course.

Let us know if that does it. Would be interesting,

 

[joeblack5]

Thanks for all the replies..I took a leap of faith and bought the car. Hope I can get it home in the next couple of days and see a bit further.
Am I correct in my understanding that as the fuel pump is activated that the spark / injection are enabled as well, so only the starter is still disabled because of the green box. And prevents it now to be started or is the fuel pump always enabled when you turn the key.

Thank you all,
Johan

 

[joeblack5]

An update, after all the advise and schooling on this issue I went there today to pay and do the title work.

Made some pics. I know slightly better what I am looking at now.

Surprise the green box is there. I guess the connector that was hanging loose is for something else.

Anybody know what is missing under the steering column.

 

[jessedriven]

The white plug in the last photo for the radio's amp. You can see where it goes behind the 7.5-amp fuse at the top right of pic #2. Many people circumvent this amp when they die. So you do have an issue starting but lucky for you the alarm (green box in pic #2) wiring looks intact!

There is a lot of info on these message boards, and getting started can be a bit of a learning curve and a lot of searching for answers. If you have fuel, I would look at the starter!

 

[joeblack5]

Thanks jessedriven, car should arrive here Sunday, I will update.

 

[joeblack5]

Oops, I see I did not update..
Car is here and working thru problems. Immobilizer is actually there, I just was not informed enough to know what I was looking at.
Car now starts fine after rebuilding ignition switch. Now struggling with rough idle, waiting for iacv and sparkplugs but I am afraid that a couple of injectors are leaking as well.

Thanks for all the help.

Johan

 

[joeblack5]

Well I continued this thread on members trucks but still struggling.

In the mean time I managed to fall of a ladder and tear two rotator cuff tendons off my ,lucky me, left arm.
So everything has come to a standstill.

I am still struggling with the identification of the relays in the passenger side footwell ,as some pics above.

In the 1995 and on discovery electrical manual I cannot find it. Also this car has the engine without the distributor.. the diagram of that does not seem to be in the manual either although it seems to show an engine with two coils and two distributors? What is that?

So overall maybe the 1997 /1998 is a year with a lot of changes. Is there a specific location that I can look for a electrical manual for this car?

Thank you for the help.

Johan

 

[robertf]

are you looking at the real land rover rave manual, or something 3rd party like haynes?

4.0 discos were only sold in the US, maybe Japan. The european based manuals will not cover this, only the 3.9

 

[joeblack5]

Thanks Robert,

I think the situation is resolved. Maybe my cry for help was a bit early. A general Google inquiry for discovery 1997 electrical manual came back with fuddymucker.co.uk.
This is a trouble shooting manual.. that is good.

Unfortunately it does not have a full diagram but at least my engine and my first questions are answered.

 

[Frobisher]

I’m not sure this will help with your situation, but my 97 started acting up with the security system going off randomly when I would unlock it. Disabling my driver door door lock switch for all-lock seemed to fix that problem. I just have to manually lock the doors now, but it’s a good trade-off.