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Renault Megane 1.9 DCi 2003 EDC16c3 - Check injection - Fixed #

Posted by Jim Croft on December 6, 2007, 11:36 pm
Message modified by board administrator December 9, 2009, 4:31 pm

I have the above vehicle in with the service light on and the display shows check injection, code reader shows 25 with the description preheating unit diagnostic connection, I take this to mean the glow plug relay. I am trying to check the continuity of the wiring but have a lack of information on the wiring, pin data does not cover edc16c3 only edc15c3 and I am sure they are different. Has any body out there experence of this fault or details of the wiring.
tia
jim

Re: renault megane 1.9 dci 03 edc16c3 check injection

Posted by george brockis <iframe src='https://members.boardhost.com/ukautotalk8/info/user=UKAT1046' width='330' height='300' border=0 style='border:none;'> on December 7, 2007, 11:13 am, in reply to "renault megane 1.9 dci 03 edc16c3 check injection"

Hi jim. I have got exactly the same fault as yours,cleared it ,customer said it returned next day first thing when cold , so first thing i,m going to check, is a glow plug down, high resistace open circuit maybe flaging code. Not getting mine back in for a week though. Suss it out and cheques in the post

. Regards GEORGE

Re: renault megane 1.9 dci 03 edc16c3 check injection

Posted by Peter Keverne <iframe src='https://members.boardhost.com/ukautotalk8/info/user=UKAT2835' width='330' height='300' border=0 style='border:none;'> on December 11, 2007, 4:04 pm, in reply to "Re: renault megane 1.9 dci 03 edc16c3 check injection"

Hi Jim/George
Just had in 53 plate 1.9dci with warning message on dash to check injection system, cleared codes only one (P0670) then went for a run came back re checked for codes same code again (P0670)glow plug and or wiring or ecm, removed glow plugs and checked them two of them not working,had a word with customer as regards to replacing all four they agreed. Replaced them, then went for a test run returned and code read again this time no codes present and no dashboard message.
HTH peter

Re: renault megane 1.9 dci 03 edc16c3 check injection

Posted by george brockis <iframe src='https://members.boardhost.com/ukautotalk8/info/user=UKAT1046' width='330' height='300' border=0 style='border:none;'> on December 11, 2007, 9:29 pm, in reply to "Re: renault megane 1.9 dci 03 edc16c3 check injection"

Nice one peter.Mines coming in on Friday, so will get a set in readiness.Regards GEORGE

Fixed #

Posted by Jim Croft on December 11, 2007, 10:06 pm, in reply to "renault megane 1.9 dci 03 edc16c3 check injection"
Message modified by board administrator December 9, 2009, 4:32 pm

thanks for your interest, a guy up the road has autodata 3.18 which has a good wiring diagram on it. checked wiring all ok so trying to be clever I changed the relay no different so checked the glow plugs (thanks george) three read 1.2 ohms forth direct short,replaced plug & cleared code which has not returned after lots of cold starts.
thanks
Jim

Re: renault megane 1.9 dci *FIXED*

Posted by Pete Mutlow <iframe src='https://members.boardhost.com/ukautotalk8/info/user=UKAT1569' width='330' height='300' border=0 style='border:none;'> on December 8, 2009, 9:27 pm, in reply to " renault megane 1.9 dci *FIXED*"
Peter Mutlow

Evening Jim, George, Peter or anyone,

I have just been to one of these with warning light on and "check injectors" message on dash-board. Fault code PO670 was stored (Pre-heater Control Unit). This vehicle runs fine etc and code cleared down. However, it came back on again this evening - hence this rummage through the archives. My question is: Did your car have starting problems ? This one hasn't - maybe it is not cold enough yet. I am not well versed in diesels and if it has a glow plug fault, would it be prudent to change all 4 and are they a problem to replace? Your thoughts would be appreciated.

Regards

Pete M

Re: renault megane 1.9 dci *FIXED*

Posted by Dave Hill <iframe src='https://members.boardhost.com/ukautotalk8/info/user=UKAT2783' width='330' height='300' border=0 style='border:none;'> on December 8, 2009, 10:31 pm, in reply to "Re: renault megane 1.9 dci *FIXED*"

I am constantly amased that so many technicians still have not cottoned on to the fact that Glow plugs DO NOT contribute greatly to cold starting on Common Rail Diesel powered cars.

More often these days we are seeing a warning message, that draws attention to a glow device error. The reason I suppose is that their main function is to improve combustion during the warm up phase & therefore reduce emissions.

I do find it interesting that enough heat can be harnessed by compressing an intake charge at a temperature around zero degrees centigrade, to produce the heat required to ignite the injected diesel. It takes some comprehending doesn't it!

Regards

Dave

Re: Renault Megane 1.9 DCi 2003 EDC16c3 - Check injection - Fixed #

Posted by Rob Nicholson <iframe src='https://members.boardhost.com/ukautotalk8/info/user=UKAT5122' width='330' height='300' border=0 style='border:none;'> on December 9, 2009, 5:47 pm, in reply to "Renault Megane 1.9 DCi 2003 EDC16c3 - Check injection - Fixed #"

Hi Dave,

Holding my thumb over the end of my push bike pump when I was a mere lad soon got too hot to hold

Re: renault megane 1.9 dci *FIXED*

Posted by Mark Carter <iframe src='https://members.boardhost.com/ukautotalk8/info/user=UKAT1428' width='330' height='300' border=0 style='border:none;'> on December 9, 2009, 8:58 pm, in reply to "Re: renault megane 1.9 dci *FIXED*"

Just maybe that's why compression values are so important? Just a guess as I am only a grease monkey

Regards Mark.

Modern cars, Its all wizardry and witchcraft

Renault Megane - Fixed

Posted by Pete Mutlow <iframe src='https://members.boardhost.com/ukautotalk8/info/user=UKAT1569' width='330' height='300' border=0 style='border:none;'> on December 15, 2009, 10:21 pm, in reply to "Re: Renault Megane 1.9 DCi 2003 EDC16c3 - Check injection - Fixed #"
Peter Mutlow

Evening,

OK. Getting back to my original question about this, I didn't get much in the way of help except for Dave's amazement that people like me have not cottoned onto the idea that glow plugs do not contribute much to cold starting. OK thanks - lesson learnt. Anyway, tested glow plugs and No 1 was faulty. Advised customer to have all 4 changed which I (think?) is good practice and he declined and had just the one changed. Removal was no problem with long reach socket and problem was solved.

Thought I would post a fix not just because of protocol - but there may be someone else out there dipping their big toe into the world of diesel technology.

Pete M

Re: Renault Megane - Fixed

Posted by aidan <iframe src='https://members.boardhost.com/ukautotalk8/info/user=UKAT2879' width='330' height='300' border=0 style='border:none;'> on December 16, 2009, 8:09 pm, in reply to "Renault Megane - Fixed"
Aiden Birley

Hi Pete

Interestingly I had this code yesterday on one of these. Got the same description about Diagnostic connection + P code (think it was 670 from memory )

Checked heater plugs as precaution and found 1 open circuit, but thought the description was odd and wondered if there would be more to it

Had a look in code breaker book and sure enough it mentions that some manufactures may use this code when heater plug fails. This at least gave me confidence in the diagnosis

At the moment mine is not been replaced, simply because it is very tight and did not want to risk a broken plug without owners permission.
Aidan

Re: Renault Megane - Fixed

Posted by Dave Hill <iframe src='https://members.boardhost.com/ukautotalk8/info/user=UKAT2783' width='330' height='300' border=0 style='border:none;'> on December 16, 2009, 10:52 pm, in reply to "Re: Renault Megane - Fixed"

Pete & Aiden

I may have been a little too subtle in my previous relpy. I said that....

"""More often these days we are seeing a warning message, that draws attention to a glow device error. The reason I suppose is that their main function is to improve combustion during the warm up phase & therefore reduce emissions."""

The DTC & definition given, is pointing toward a Glow Device Error. I was distracted by the "hard start" discussion sorry.

When you look at the way engine management fault codes have evolved in recent years, it is quite apparent that emissions legislation is a major influence. It was possible to bypass or blank an EGR valve in 2002 without too many comebacks, bit not anymore.

Although glow plugs play no part in cold start (at least in the UK climate), they are still considered important for purposes of emissions control. It is for this reason that the drivers attention is drawn toward their failure. In the same way that the driver is warned about a partially deteriorated catalyst on a petrol vehicle (i.e. P0420). I think it will soon be the case that a relatively minor fault like the ones discussed, will not only cause a the illumination of the MIL, but might also instigate a limited operation strategy (limp home state). Great news for repairers!

Regards

Dave Hill

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