Clio II immobiliser problem - Renault Forums :: Independent Renault forum

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post #1 of 10 (permalink) Old 10th July 2016 Thread Starter
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Clio II immobiliser problem

Hi. I have read a lot of forums and seen many work arounds for immobiliser problems with Clios but not found one like this. Hopefully these symptoms will be recognised by some experienced Renault owners or technicians and a solution is already known?
With a fully charged battery, when the ignition is turned on, the immobiliser light is blinking and when the key is turned further to engage the starter, nothing happens. If however, a unhealthy battery which has around 9v charge is used when the key is turned to the ignition on stage, the immobiliser light is a solid red as it should be. Without disconnection the sick battery or turning the ignition off, connecting a healthy battery allows turning the key further to engage the starter and the car starts perfectly. This works every time, no problem. I have used this car a number of times on the weekends like this with multiple starts during the outing. I can do this quite effectively by keeping the good battery as the main battery, disconnecting the +ve cable and using a sick battery with jumper leads to the +ve cable when turning on the ignition, then connecting the +ve terminal back on to the main battery for the starting. It just looks a bit dodgy doing this in public places all the time! Any magic solutions anybody?
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1992 R21 Turbo, 1987 R21 Savanna, 2003 Clio II 1.4, 1963 VW Beetle (Parents bought it new), 1998 Polo 1.6, 2007 Allroad 4.2, 2003 Odyssey. 2008 Hyundai H1 Van 2.5TD
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post #2 of 10 (permalink) Old 10th July 2016
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Re: Clio II immobiliser problem

Explain, what are you calling the + VE lead.
Yes I know what a +VE lead is honest, but lets make sure we are both on the same page..

Are you leaving the main lead of the battery terminals connected, then undoing one of the leads, off the positive connector of the battery and jumping through this,

There are 3 sides to every triangle.
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post #3 of 10 (permalink) Old 10th July 2016
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Re: Clio II immobiliser problem

And, where are you putting your earth jumper lead.
Battery or engine / car body.??
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post #4 of 10 (permalink) Old 11th July 2016 Thread Starter
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Re: Clio II immobiliser problem

Hi. Just to clarify, Yes, the main car electrical cables are normally connected to the good battery terminals installed in the car except for when I momentarily disconnect the +ve terminal from the battery and use the +ve jumper lead to power up the car at around 9 volts from the sick battery. The -ve jumper lead is left on the negative terminal which remains connected to the chassis as normal the whole time. Once the key has been turned to the "ignition on" position (but not as far as engaging the starter) (the immobiliser light is not flashing like it would be if I did this 12 volts) I re-attach the main +ve cable of the car to the good battery terminal without disconnecting the jumper lead with the 9 volt supply. Once the terminal is done up I disconnect the 9 volt supply and turn the key and it starts without any issue. In addition to this, I can turn the car off for a few seconds and re-start without having to go through this routine again but if it is turned off for more than say 5 to 10 seconds, i have to go through this procedure again. Thanks.
Currently in 21TBONZ's garage:
1992 R21 Turbo, 1987 R21 Savanna, 2003 Clio II 1.4, 1963 VW Beetle (Parents bought it new), 1998 Polo 1.6, 2007 Allroad 4.2, 2003 Odyssey. 2008 Hyundai H1 Van 2.5TD
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post #5 of 10 (permalink) Old 11th July 2016
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Re: Clio II immobiliser problem

Am still none the wiser, but, this is what it seems like is happening.
When you pull that wire you have mentioned, it is pulling slightly on your fusebox, and one of the relays/fuses, that controls your starting/fuel/immobiliser, is making contact, and allowing start conditions to be met
See if that is what is actually happening,

There are 3 sides to every triangle.
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My Baby ( or the shed on wheels )Laguna 2 estate with 12 months MOT..
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