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Author Topic: TJ Immobiliser  (Read 2161 times)

0 Members and 1 Guest are viewing this topic.

bagofsand

  • Guest
TJ Immobiliser
« on: September 13, 2014, 08:35:22 AM »

I have check on here for help with my non staring TJ 4.0 auto. I had left it standing for about 9 months and the battery was stone dead, once I put a fully charged battery on it cranked over for ages and eventually started. Drove it on to the drive and parked it when I tried to start it a few days later it would crank but not start. The immobiliser light is on constant so I reckon I have the standard immo / pcm fault. is there any thing else I can try to get it going? what info do I need to check when ordering a usa spec pcm? Thanks for any help.
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Yakko

  • Guest
TJ Immobiliser
« Reply #1 on: September 14, 2014, 08:47:31 AM »

Hi.

When I bought my PCM from the US the advice I got was to match the year, engine, gearbox and the colours of the block connectors.

I paid $70 plus shipping, found it on eBay (.com, not .co.uk).
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bagofsand

  • Guest
Re: TJ Immobiliser
« Reply #2 on: September 14, 2014, 12:03:55 PM »

Thanks Yakko. is it really just a case of plug and play? no coding or resetting? cheers Iain
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bagofsand

  • Guest
Re: TJ Immobiliser
« Reply #3 on: September 17, 2014, 07:03:26 AM »

any more info on this?
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charlie jeep

  • Guest
Re: TJ Immobiliser
« Reply #4 on: September 17, 2014, 12:48:08 PM »

I am assuming you tried disconnecting the battery and reconnecting?
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Cockney Boy

  • Guest
Re: TJ Immobiliser
« Reply #5 on: September 17, 2014, 12:53:38 PM »

Before you do anything. Get a full scan done . This will be your starting point before pulling your truck apart
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Yakko

  • Guest
TJ Immobiliser
« Reply #6 on: September 17, 2014, 01:20:33 PM »

Check the easy stuff first. E.g. Have you tried replacing the battery in the immobiliser remote?

When my immobiliser is still on, my car will start and run for about 2 seconds before cutting out. Is this what you're getting or does it not run at all?
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bagofsand

  • Guest
Re: TJ Immobiliser
« Reply #7 on: September 23, 2014, 08:06:56 PM »

hi, I have swapped the remote batteries. jeep wont run at all now, will turn over. no spark at plugs. red light is on solid.

Thanks again
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Cockney Boy

  • Guest
Re: TJ Immobiliser
« Reply #8 on: September 23, 2014, 08:55:40 PM »

SCAN !!


Sent from my iPad using Tapatalk HD
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Jonny Jeep

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  • Vehicle: TJ 4.0 Sport
  • Year: 1997
Re: TJ Immobiliser
« Reply #9 on: September 24, 2014, 09:18:15 AM »

My LED has came on constant a couple of times in the past. In both instances I believe it cleared after pressing and holding the button on the control whilst cranking. Engine started and normal operation resumed. I have a Thatcham Cat 1 alarm too and that needs to be turned off first or the Jeep immobiliser doesn't like to turn off.
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bagofsand

  • Guest
Re: TJ Immobiliser
« Reply #10 on: September 24, 2014, 06:52:36 PM »

Thanks JJ I will try that.
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MOCAJ

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Re: TJ Immobiliser
« Reply #11 on: September 24, 2014, 07:24:17 PM »

turn ignition on, red light will be constant, when it goes out press unlock then try to start

try a few times but if it doesn't start PCM might need flashing.

This happened to me after Jeep was stood for a while with no 12 volt and Kev, Bubba had to tow me to local Jeep dealer to sort
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short term jeep owner since 2005, every truck is a never ending project. Birtys, the best club in Jeepland
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