850r wont start. - Page 2

Scairns22 · Jun 17th, 2014, 21:19

Quick update. Problem found to be immobiliser. Anyone have any idea where I could get a full key set along with immobiliser box and ecu for an 850r or a t5?
Simon

t5pete · Jun 17th, 2014, 22:20

what problem have you found within the immobiliser

Scairns22 · Jun 18th, 2014, 15:41

Car basically starts and stops again after 2 seconds so immobiliser is engaged. But the car never came witha keyfob so I cant lock and unlock the car to reset it. Or is a different procedure I need to do?

Luxobarge · Jun 18th, 2014, 16:48

Key fob drives the central locking and car alarm, and is a completely seperate system from the immobiliser.

The immobiliser is driven from the chip in the ignition key. The signal from the chip is picked up by the antenna ring which goes around the ignition barrel and is interpreted by the immobiliser as being valid or not. Clearly on your car this isn't happening - I take it you are using the proper Volvo key intended for this car?

thetroublemaker · Jun 19th, 2014, 11:40

the antenna ring is not coded to the car, the key is.

therefore replacing the antennae ring (£35 from volvo) and making good the wiring should resolve the issue.

scutyde · Jun 20th, 2014, 09:50

The codes from the immo box can be read and it shows what is wrong (key or ECU or something different). If you swap an engine with a different type (N/A to turbo or viceversa) the immo will detect that and kick in.

Also ECU from 96 onwards need the confirmation signal from the immo box in order to run after the 2 seconds and if you fit an ECU from a 96 car in a pre 96 car without the immo system it will also not run.

Scairns22 · Jun 22nd, 2014, 16:23

Engine is definitely later 1996 ecu codes match up to an 850r manual. Shell is a 1995 2.0 glt on tax book so must have had Volvo guard 1 fitted. The retrofitted volvo guard 2 kit looks a shambles so I might just get the proper loom for it from a newer car and make it right. Guy had 2 wires running to ecu. One for what I believe is the start inhibitor circuit for the ecu and the other an earth or something as its spliced into a wire for fault code reading from what I can see. If I could I would do away with the entire thing as I just need this car going. I can get a good aftermarket central locking kit put into her and just have a switched immobiliser in a hard to reach place. Car is parked in a garage always so dont really need it. Has anyone ever de-immobilised one of the motronic 4.4's? Removing start inhibitor?

scutyde · Jun 23rd, 2014, 13:34

You need to rewrite the ECU Software in order to kill the immo function in the ECU. Just with wiring you will gain nothing,.

Scairns22 · Jun 23rd, 2014, 22:50

Is there anybody in the uk who has the capability of flashing the ecu to remove the immobiliser function? I just really need the car running and driving asap with as little hassle as possible.
I will not let this car beat me haha.
Simon

Scairns22 · Jun 25th, 2014, 16:27

Immo box.

Wires to ecu

more wires from immo box

Key anf pickup ring.

More sporty wiring

Jun 17th, 2014, 21:19	#11
Scairns22 Junior Member Last Online: Jul 28th, 2016 13:47 Join Date: Apr 2013 Location: Londonderry	Quick update. Problem found to be immobiliser. Anyone have any idea where I could get a full key set along with immobiliser box and ecu for an 850r or a t5? Simon __________________ 850 t-5r replica. 850r engine. 940 se 2.4 tdic estate.(Daily) 1978 escort mk2.1350 burton spec hotrod engine. Screamer.(My baby)

Jun 17th, 2014, 22:20	#12
t5pete The three volvo's Last Online: May 26th, 2019 15:58 Join Date: Mar 2009 Location: barnsley	what problem have you found within the immobiliser __________________ Sunny barnsley

Jun 18th, 2014, 15:41	#13
Scairns22 Junior Member Last Online: Jul 28th, 2016 13:47 Join Date: Apr 2013 Location: Londonderry	Car basically starts and stops again after 2 seconds so immobiliser is engaged. But the car never came witha keyfob so I cant lock and unlock the car to reset it. Or is a different procedure I need to do? __________________ 850 t-5r replica. 850r engine. 940 se 2.4 tdic estate.(Daily) 1978 escort mk2.1350 burton spec hotrod engine. Screamer.(My baby)

Jun 18th, 2014, 16:48	#14
Luxobarge Premier Member Last Online: Yesterday 22:26 Join Date: Jan 2011 Location: Horne (Nr. Horley)	Key fob drives the central locking and car alarm, and is a completely seperate system from the immobiliser. The immobiliser is driven from the chip in the ignition key. The signal from the chip is picked up by the antenna ring which goes around the ignition barrel and is interpreted by the immobiliser as being valid or not. Clearly on your car this isn't happening - I take it you are using the proper Volvo key intended for this car? __________________ Some people are like Slinkies, they serve no useful purpose but they still bring a smile to your face when you push them downstairs. Last edited by Luxobarge; Jun 18th, 2014 at 16:52.

Jun 19th, 2014, 11:40	#15
thetroublemaker Senior Member Last Online: Feb 20th, 2019 18:16 Join Date: Apr 2006 Location: mk	the antenna ring is not coded to the car, the key is. therefore replacing the antennae ring (£35 from volvo) and making good the wiring should resolve the issue. __________________ 1999 C70 T5 GT ME7

Jun 20th, 2014, 09:50	#16
scutyde Retrofit master Last Online: Mar 28th, 2022 10:14 Join Date: Mar 2010 Location: Berlin	The codes from the immo box can be read and it shows what is wrong (key or ECU or something different). If you swap an engine with a different type (N/A to turbo or viceversa) the immo will detect that and kick in. Also ECU from 96 onwards need the confirmation signal from the immo box in order to run after the 2 seconds and if you fit an ECU from a 96 car in a pre 96 car without the immo system it will also not run. __________________ Volvo 850 2.5 20V MY95 Pictures Here what I retroffited so far List

Jun 22nd, 2014, 16:23	#17
Scairns22 Junior Member Last Online: Jul 28th, 2016 13:47 Join Date: Apr 2013 Location: Londonderry	Engine is definitely later 1996 ecu codes match up to an 850r manual. Shell is a 1995 2.0 glt on tax book so must have had Volvo guard 1 fitted. The retrofitted volvo guard 2 kit looks a shambles so I might just get the proper loom for it from a newer car and make it right. Guy had 2 wires running to ecu. One for what I believe is the start inhibitor circuit for the ecu and the other an earth or something as its spliced into a wire for fault code reading from what I can see. If I could I would do away with the entire thing as I just need this car going. I can get a good aftermarket central locking kit put into her and just have a switched immobiliser in a hard to reach place. Car is parked in a garage always so dont really need it. Has anyone ever de-immobilised one of the motronic 4.4's? Removing start inhibitor? __________________ 850 t-5r replica. 850r engine. 940 se 2.4 tdic estate.(Daily) 1978 escort mk2.1350 burton spec hotrod engine. Screamer.(My baby)

Jun 23rd, 2014, 13:34	#18
scutyde Retrofit master Last Online: Mar 28th, 2022 10:14 Join Date: Mar 2010 Location: Berlin	You need to rewrite the ECU Software in order to kill the immo function in the ECU. Just with wiring you will gain nothing,. __________________ Volvo 850 2.5 20V MY95 Pictures Here what I retroffited so far List

Jun 23rd, 2014, 22:50	#19
Scairns22 Junior Member Last Online: Jul 28th, 2016 13:47 Join Date: Apr 2013 Location: Londonderry	Is there anybody in the uk who has the capability of flashing the ecu to remove the immobiliser function? I just really need the car running and driving asap with as little hassle as possible. I will not let this car beat me haha. Simon __________________ 850 t-5r replica. 850r engine. 940 se 2.4 tdic estate.(Daily) 1978 escort mk2.1350 burton spec hotrod engine. Screamer.(My baby)

Jun 25th, 2014, 16:27	#20
Scairns22 Junior Member Last Online: Jul 28th, 2016 13:47 Join Date: Apr 2013 Location: Londonderry	Immo box. Wires to ecu more wires from immo box Key anf pickup ring. More sporty wiring __________________ 850 t-5r replica. 850r engine. 940 se 2.4 tdic estate.(Daily) 1978 escort mk2.1350 burton spec hotrod engine. Screamer.(My baby)

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