Lexus LS400 (1990 - 2000) - 1995 4 litre flat battery

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Wed 24 Dec 2008 17:06
1995 4 litre flat battery - menorca
Have got flat battery.Immobiliser has engaged and I have never had remote key fob for it.What can I do to start car ?
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Wed 24 Dec 2008 18:42
1995 4 litre flat battery - Dynamic Dave
The logical answer would be to recharge the battery. Guessing then that the immobiliser will sort itself out. Not sure what difference having or not having a remote keyfob makes though.
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Wed 24 Dec 2008 18:49
1995 4 litre flat battery - rtj70
I am assuming the keyfob is used to enable/disable the immobiliser. And menorca has not got it so has never armed the immobiliser. The recent flat battery has now caused the immobiliser to arm itself and he has no way of turning it off.

If this is the case... not sure this forum is the place to discuss this. You might need to advice of a good auto-electrician or a Lexus service department.

Edited by rtj70 on 24/12/2008 at 18:49

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Wed 24 Dec 2008 19:54
1995 4 litre flat battery - gordonbennet
Menorca, are you trying to start the car by jump leads alone or have you charged the battery properly?

Try charging the battery overnight, then reconnect, close bonnet lock doors and unlock again and try, not promising it will work.

The idea above about lexus forum is a good idea, those lads should know if there's a manual override.
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Thu 25 Dec 2008 08:12
1995 4 litre flat battery - Falkirk Bairn
Menorca are you trying to start the car by jump leads alone or have you
charged the battery properly?
Try charging the battery overnight then reconnect close bonnet lock doors and unlock again and try not promising it will work.


AA man came and by shutting everything off, ignition off , locking doors.......repeating a number of times the immobiliser was finally overcome and this allowed car to start.

Q - How can thieves steal cars when with the keys the owner is left bewildered?
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Thu 2 Feb 2012 10:08
1995 4 litre flat battery - carbonunit1

hi just bought a 4litre,it has been imobile for two years,so the imobilizer has probably kicked in,it looks in a right state bonnet up covered in dust.you have to go through some strange routines sometimes to reset imobilisers,aspecially cit c5,the worst most unreliable useless piece of junk car ever invented.so i will let you know if i can get it going.the previous owner said he just ran it in there and left it,so being an optomist..lets see what happens.if i cant get it i will have to contact lexus..

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Sun 26 Feb 2012 22:35
1995 4 litre flat battery - carbonunit1

amazing car,to continue from previous story,i subsequently found the car had been standing for 4 years,i put a fully charged battery on it,changed a flat tyre,tentavily switched on ignition,all lights came on,amazing,turned ign,wow,started first time,noise from engine quick look,steering fluid,switched off,topped up,smooth,no noise,put it in gear slowly,little throttle,bit of a jerk brakes unstick,drove it back and forward,good,drove it up and down,worked brakes little bit of working,lovely,phoned mot,drove it 12miles to mot,failed,two broken rear springs,rusty brake pipes,emmission fault i traced to concertina heat xchanger,spent 3 days cleaning it,its an absolutely lovely car,112,000 lexus dealer service history,cant wait to put it on road,had 4 new tyres from a heap of crap cit c5 for it,only fault i guess is it will be a bit thirsty.see how i get on.driving gently.anyone changed rear springs and shocks,looks straitforward..

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