C70: - Disarming Alarm using ignition key

adder · Sep 19th, 2019, 22:00

Hi, After losing the only key and remote control, I called out the RAC to get me and the car home. It's taken a week to order the parts in and it will be another week untill volvo can fit the parts needed to use remote control..
As one of the parts is the ignition key, I thought I'd be able to disarm alarm and start it up. So using ignition key I opened the doors okay even though hazard lights came on but alarm didn't sound. Which I put down to a slightly flat battery as after turning the key in the ignition the dash board lights lit up but engine wouldn't turn over.
So i charged battery over night, but as soon as I connected it back up to the car the alarm activated. So as I had done on other occations, using ignition key I unlocked the doors and trid starting the engine. Which usually disarms the alarm and starts the car. But not this time.
I got dash board lights up but engine didn't turn over and alarm continued.
Could this be due to the bonnet being open or because I disconected the battery whilst alarm was armed ?
Or do I have to be patient and wait for volvo to fit what is needed to use remote control ?
Any suggestions will be helpful, thanks in advance Adder

Cookeh · Sep 19th, 2019, 22:59

Seems like you triggered the immobiliser - happens frequently in your scenario. Either reset that with the remote fob, or pull fuses to reset it (there are certain ones in a certain order, that I can't remember, but I know are on this site somwhere).

ASt85 · Sep 20th, 2019, 10:08

If you lock and the unlock the door 5 times using the key it should disarm the armed immobiliser - the key in the ignition then disarms the reset immobiliser.

If that technique fails disconnect the battery 20 minutes after you have removed the key from the ignition - cross connected the positive and negative cables to ensure everything is dumped from the memory.

Put the key in the ignition lock and turn to position II - reconnect the battery. The key must be in the ignition lock so it is identified by the immobiliser ring at the reconnection of the battery, it also prevents a voltage spike firing airbags.

adder · Sep 20th, 2019, 11:55

Thanks guys, gonna wade through threads to try n find 'Cookeh's' first then i'll try 'ASt85's' second suggestion as alarm is triggered as soon as I connect the battery.... which is a bit weird as the alarm wasn't triggered when it was delivered on tow truck. I'll let you know what happens

ASt85 · Sep 20th, 2019, 14:45

Quote:

Originally Posted by adder

Thanks guys, gonna wade through threads to try n find 'Cookeh's' first then i'll try 'ASt85's' second suggestion as alarm is triggered as soon as I connect the battery.... which is a bit weird as the alarm wasn't triggered when it was delivered on tow truck. I'll let you know what happens

Connecting the battery triggers the alarm on my 2004 C70 and the 2001 2.4 V70 unless the key is in the ignition at position II - it is the voltage spike on connection which can trigger the alarm depending upon the charge in the battery.

If you only have the one key to hand, take it out of the ignition, the alarm should continue to sound; whilst the alarm is sounding lock and then unlock the drivers door using the key and the alarm should stop.

Baffler · Sep 20th, 2019, 15:29

Also note the chip in the new key will need to be programmed to the ECU in order for the immobiliser module to recognise it which will then allow you to start the engine.

As far as I can remember both key and RC fob programming are dealer only options on the S/V/C70.

pff · Sep 20th, 2019, 20:59

If you lost the only key then the assumption is that the new key is just cut but not programmed to the car? So then the immobiliser wont recognize it, and so it the alarm controller wont get a signal to a) stop the alarm sounding or b) ground the starter relay.

adder · Sep 20th, 2019, 22:50

Quote:

Originally Posted by pff

If you lost the only key then the assumption is that the new key is just cut but not programmed to the car? So then the immobiliser wont recognize it, and so it the alarm controller wont get a signal to a) stop the alarm sounding or b) ground the starter relay.

So are you saying that I just have to be patient ?

ASt85 · Sep 21st, 2019, 06:34

Quote:

Originally Posted by adder

So using ignition key I opened the doors okay even though hazard lights came on but alarm didn't sound.

Has this key been programmed or not - if it hasn't it will not disarm the immobiliser - the only way to bypass it is as pff says is to apply +12V to the solenoid 4mm spade terminal, which then gets you into other troublesome areas - don't do it - you will have to wait for the key to be programmed to the car.

Have you asked the RAC if there is a competent car locksmith in the Bath area?
Have you tried https://www.the-carkey-specialist.co.uk/bath ?

adder · Sep 21st, 2019, 17:22

No, the key hasn't been programmed... I didn't know that was possible. I will ring RAC shortly although they don't seem very knowledgeable about anything. So I think I should speak with locksmith first.
When I lost my keys, it took them 14 hours and £275 to get to me, while I was up a mountain (Hay Bluff) on a rainy night on my own, no shelter or extra clothing and they couldn't find the mountain that has one road to it !
Thank you so much for your help ASt85 and everyone else that has contributed

I update in a couple of days

Sep 19th, 2019, 22:00	#1
adder New Member Last Online: Oct 20th, 2020 15:41 Join Date: Dec 2016 Location: Bath	Disarming Alarm using ignition key Hi, After losing the only key and remote control, I called out the RAC to get me and the car home. It's taken a week to order the parts in and it will be another week untill volvo can fit the parts needed to use remote control.. As one of the parts is the ignition key, I thought I'd be able to disarm alarm and start it up. So using ignition key I opened the doors okay even though hazard lights came on but alarm didn't sound. Which I put down to a slightly flat battery as after turning the key in the ignition the dash board lights lit up but engine wouldn't turn over. So i charged battery over night, but as soon as I connected it back up to the car the alarm activated. So as I had done on other occations, using ignition key I unlocked the doors and trid starting the engine. Which usually disarms the alarm and starts the car. But not this time. I got dash board lights up but engine didn't turn over and alarm continued. Could this be due to the bonnet being open or because I disconected the battery whilst alarm was armed ? Or do I have to be patient and wait for volvo to fit what is needed to use remote control ? Any suggestions will be helpful, thanks in advance Adder __________________ C70 - 2002 - 2.3 coupe Auto.

Sep 19th, 2019, 22:59	#2
Cookeh Premier Member Last Online: Sep 14th, 2022 17:04 Join Date: Jan 2018 Location: Derbyshire	Seems like you triggered the immobiliser - happens frequently in your scenario. Either reset that with the remote fob, or pull fuses to reset it (there are certain ones in a certain order, that I can't remember, but I know are on this site somwhere). __________________ 1995 Volvo 850 T5 Estate (Manual)

Sep 20th, 2019, 10:08	#3
ASt85 Premier Member Last Online: Today 01:51 Join Date: Aug 2010 Location: Walderslade....Kent	If you lock and the unlock the door 5 times using the key it should disarm the armed immobiliser - the key in the ignition then disarms the reset immobiliser. If that technique fails disconnect the battery 20 minutes after you have removed the key from the ignition - cross connected the positive and negative cables to ensure everything is dumped from the memory. Put the key in the ignition lock and turn to position II - reconnect the battery. The key must be in the ignition lock so it is identified by the immobiliser ring at the reconnection of the battery, it also prevents a voltage spike firing airbags. __________________ The saddest moment is when the one who gave you the best memories....becomes a MEMORY V70 SE 2004 2.3L T5 Geartronic, C70 2005 2.0T Automatic, Sold 2.4l 20 Valve Automatic Torslander Sold 854 GLT 20v Auto Last edited by ASt85; Sep 20th, 2019 at 10:12.

Sep 20th, 2019, 11:55	#4
adder New Member Last Online: Oct 20th, 2020 15:41 Join Date: Dec 2016 Location: Bath	Thanks guys, gonna wade through threads to try n find 'Cookeh's' first then i'll try 'ASt85's' second suggestion as alarm is triggered as soon as I connect the battery.... which is a bit weird as the alarm wasn't triggered when it was delivered on tow truck. I'll let you know what happens __________________ C70 - 2002 - 2.3 coupe Auto.

Sep 20th, 2019, 15:29	#6
Baffler Premier Member Last Online: Jun 17th, 2024 13:57 Join Date: Dec 2002 Location: Co. Limerick, Ireland	Also note the chip in the new key will need to be programmed to the ECU in order for the immobiliser module to recognise it which will then allow you to start the engine. As far as I can remember both key and RC fob programming are dealer only options on the S/V/C70. __________________ Liam... '96 854 TDI SE, '99 V70 2.5D S, '05 C70 2.0T Collection, '05 S80 2.0T SE, '15 V70 D4 SE Lux Nav.

Sep 20th, 2019, 20:59	#7
pff Junior Member Last Online: Aug 11th, 2023 19:23 Join Date: Oct 2013 Location: noway	If you lost the only key then the assumption is that the new key is just cut but not programmed to the car? So then the immobiliser wont recognize it, and so it the alarm controller wont get a signal to a) stop the alarm sounding or b) ground the starter relay. __________________ V70 2000 P80 old style, green and white.

Sep 21st, 2019, 17:22	#10
adder New Member Last Online: Oct 20th, 2020 15:41 Join Date: Dec 2016 Location: Bath	No, the key hasn't been programmed... I didn't know that was possible. I will ring RAC shortly although they don't seem very knowledgeable about anything. So I think I should speak with locksmith first. When I lost my keys, it took them 14 hours and £275 to get to me, while I was up a mountain (Hay Bluff) on a rainy night on my own, no shelter or extra clothing and they couldn't find the mountain that has one road to it ! Thank you so much for your help ASt85 and everyone else that has contributed I update in a couple of days __________________ C70 - 2002 - 2.3 coupe Auto.

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