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Volvo 850 2.5 1995 - Non starter - Fixed #

Posted by Jules Van Aken on August 6, 2009, 7:59 am

Year of Manufacture *: 1997
Engine Code or Type *: B5254
( Optional ) ECU Type: bosh LH 3.2

None starter,got voltage to ignition module & ignition coil,but no puls at coil or HT.
Fuel pump runs.Got voltage at injectors but no pulse.Coil & ign module & crank sensor are known to be good Of working car.Has any body got a component locator for this vehicle(for relays) and pin data for the ignition ECU?(where does ECU earth???PIN???)I have only the cam position sensor testing left & after that I run out of options without pin data & wiring diagrams & component locator??? Hopefull?Thanks Jules.

Re: Volvo 850 2.5ltr. 20 valve n-reg none starter

Posted by Dave Harney User icon on August 6, 2009, 9:17 am, in reply to "Volvo 850 2.5ltr. 20 valve n-reg none starter"
Dave Harney

Volvo 850 LH 3.2

Volvo 850 Component list

Volvo 850 Relays

Volvo 850 Earths

Volvo 850 Electrical distribution

Volvo 850 Fuses

Regards
Dave

You can trim a sheeps wool many times, but you can only fleece it once !

Re: Volvo 850 2.5 1995 - Non starter #

Posted by Mike Walker User icon on August 7, 2009, 2:12 pm, in reply to "Volvo 850 2.5 1995 - Non starter #"

Just one thought. As this is a 5-cylinder engine the ignition does not attempt to fire unless the ignition ECU can determine where in the firing cycle the engine is. This means that any descrepancy between the crank signal and cam signal means no ignition. i.e. not just a cam timing error?

Link: ATP Electronics the original all makes remanufactureres.

Re: Volvo 850 2.5 1995 - Non starter #

Posted by Jim Watson User icon on August 7, 2009, 6:36 pm, in reply to "Volvo 850 2.5 1995 - Non starter #"

Hi there, can you get any fault codes from it? This should have the led type box under the bonnet, or it might be a very early 16 pin socket in the car. I have had a few with faulty cam sensors but they still start and run .

Re: Volvo 850 2.5 1995 - Non starter #

Posted by Jules van Aken User icon on August 8, 2009, 8:08 am, in reply to "Re: Volvo 850 2.5 1995 - Non starter #"
Jules Van Aken

Dave,Mike & Jim. Thanks very much for your help.All "points taken".I am going to get stuck in on Monday armed with all this info.Thanks very much.Jules.

Fixed #

Posted by Jules Van Aken on August 15, 2009, 10:12 am, in reply to "Re: Volvo 850 2.5 1995 - Non starter #"
Message modified by board administrator August 17, 2009, 11:40 am

The very last thing I checked on this vehicle was the Cam sensor and as soon as I scoped it ,bingo.Thanks for all the very usefull info. From Jules.

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