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700/900 Series General Forum for the Volvo 740, 760, 780, 940, 960 & S/V90 cars |
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97 s90 no transponder keyViews : 1979 Replies : 20Users Viewing This Thread : |
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Nov 11th, 2019, 15:33 | #11 |
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Not difficult - and quick.
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Nov 12th, 2019, 00:58 | #12 |
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There is no work around for the RFID immobiliser, other than replacing the ECU and reader module or ECU chip. Its only on cars 96 on.
The alarm/immobiliser is also used at the same time and is easy to work around, guard 1 or guard 2. The Key chip immobiliser is completely independant of the alarm/immbiliser, its always armed when the engine is switched off. It requires modules to talk and authorise the fuel computer to run the engine. Am I missing something? |
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Nov 12th, 2019, 12:41 | #13 |
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Immobilizer
The immobilizer is not actually armed when the engine is switched off.
As soon as the engine is started, the fuel ECU sends a digital signal to the immo module. If the immo module recognises the RFID key, the module sends a signal back to the fuel ECU and the ECU will authorize the fuel pump to run. If there is no signal returned, the engine will stall within one or two seconds with the lambda light illuminated all the time. Upon a second start attempt the engine will not even pick up anymore. There is no way of bypassing this, as a bypass should actively respond to the fuel ECU. Easiest is to find an RFID key with corresponding immo module, as these are the only two items that are paired. Tape the RFID key somewhere close to the antenna ring around the ignition barrel and replace the original immo module. This way you can use a simple, non RFID key for opening doors and starting. |
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Nov 13th, 2019, 00:43 | #14 | |
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Quote:
When it is armed then? My understanding is that for fail safe reasons it stay unarmed once the engine starts (or once the ignition is on and the key is recognised). I found it wasn't transplantable with another ECU from the same year, as stated in the Volvo manual they are coded together for life. You can transplant them to an older ECU, but it doesn't immobilise the engine. If you gonna buy a immobiliser unit and tape up the RFID chip to it, you may aswell not bother and just chip the ECU. |
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Nov 13th, 2019, 13:42 | #15 |
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Paired with ECU
I know that the Volvo Manual states that ECU and immo-unit are coded together, but when I had an intermittent immo-problem, I have exchanged the immo-module + key without a problem. But I agree, a reprogrammed chip without immo-function is just as easy.
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Nov 18th, 2019, 18:24 | #16 | |
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Quote:
-------------------------------------------------------------------------------------------------------------------------------------------- Can you start the car with the cut key? If so, it has the transponder chip in it and it can be cloned for a modest price. However, it would involve sending the key to the cloner, involving delay and risk of it being lost in transit. There is a key cloner in the UK that I have found reliable and reasonable (around £40 to cut a key for my V90 and clone its transponder chip). All I can find at the moment is his email address enquiries@keymoon.uk He made a key for me earlier this year and also several years ago. I think the key that opens everything but the trunk is intended to lending (for example) to valet parking personnel. Obvioulsly not being able to open the trunk is not ideal. Martin Added: Found his website: https://www.keymoon.uk/ Last edited by martin calva; Nov 18th, 2019 at 18:36. |
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Nov 18th, 2019, 22:35 | #17 |
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In the first message the topicstarter complains that the car (hopefully he means the starter motor) refuses to turn over.
This typically indicates a problem with the Guard II alarm as the immobilizer blocks the fuel injection. First step is to have the starter engine working, after that worry about the immobilizer. Easiest way to bypass the Guard II alarm is to remove its fuse; this will remove power from the alarm and the central locking. As Volvo was dumb enough to use Normally Closed relays, removing the power from the alarm will bridge the interruption in the starter motor circuit. I cannot mention the fuse-number in this public forum, but it's the same number the Dutch football player Johan Cruijff used all his life. Perhaps the TS is in luck as the so called garage key, while preventing access to the glove compartiment and the trunk, should have a RFID chip installed. Last edited by Piet22; Nov 18th, 2019 at 22:55. |
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Nov 19th, 2019, 13:58 | #18 | |
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Quote:
1 for the starter (basic relay, alarm activated) 1 for the fuel system (not related to the alarm being on or off, need chip key) |
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Jan 9th, 2020, 13:34 | #19 |
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Hey, so sorry I forgot to update my situation as people were trying to help me out at a rather stressful time for me.
The key I had cut to the passenger door barrel would not work as it didn’t have a chip programmed to the car. After calling many locksmiths most did not want to help me, they all said it’s a risky job and could render my car a brick which I didn’t want. For $350 AUD someone did come and explained to me the risk again, he started to go to work on my car and literally 10 minutes later I heard the engine start. The key he cut was not traced well by the machine though, my key that opens the door has ridges that are more pronounced so the new key is purely a ignition key. It has a little square tab that I’m sure has the chip inside and one day I will remove it and place it in a position that both keys will work. I’m just not sure if the chip is easily damaged so will have to call the locksmith to ask him before I proceed. I registered the car over the holiday period and started planning its maiden voyage and decided my next ice hockey game was a perfect first outing for me and my sweedish car. I have literally fallen in love with this car, it has a few broken interior pieces and the aircon is not cold at all (which sucks with the climate in Australia at the moment) but I will tackle these issues as me and my girl absolutely love driving it. We are planning to get some nice wheels after I touch up some body work. As a spray painter I would love it to look stunning. If anyone in Sydney ever has this issue Marcos locksmiths is the company you need, I have kept his business card incase another Volvo driver needs him some day. Thanks for the responses, having people try to help is a nice thing in this world but as I got stressed money was the best way out. Sorry again for not updating. Last edited by Stalledvolvos90; Jan 9th, 2020 at 13:40. |
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Jan 9th, 2020, 18:53 | #20 |
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Glad to hear you're mobile again and have returned another Volvo to its natural hunting ground - the road!
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