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Unread 02-01-2010, 09:36 AM   #1
tallguy6464
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CRD #6 Glow Plug Circuit Error

I have an 07 Grand Cherokee CRD and the DTC code tells me that the #6 glow plug circuit is defective. Where is the location of this plug/cylinder on the engine? How can you tell if the glow plug or the glow plug controller is shot?

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Unread 02-01-2010, 12:21 PM   #2
kreso
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Most probably it is not a circuit but glow plug by itself. Eider it draw to much current or no current at all. If I am correct cylinder #6 is the last one on the right cylinder bank looking from the grill(driver side near the fire wall).
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Unread 02-01-2010, 09:18 PM   #3
suzieque
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you should also search this forum for "glow" or "glow plug" you will find a number of threads to read.
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Unread 02-02-2010, 09:06 AM   #4
tallguy6464
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Since my Jeep is past the 60000 km bumper to bumper warranty I try to diagnose it myself. FYI if anyone wants a good source for glow plugs I suugest Europarts of San Diego where they run for $38.91. Thanks for the suggestions. Does anyone have a diagram that shows all the cylinder numbers on the engine in case I have another glow plug fail?
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Unread 02-02-2010, 08:25 PM   #5
suzieque
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I think its worthwhile doing some research into the topic of glow plug failure and see what we can find...

I came across a couple posts on different sites where owners replaced their batteries and the glow plug failure message went away. You may want to have your battery load tested prior to replacing a glow plug.

I also read about a glow plug reamer to clean the port where the glow plug goes
http://www.mercedessource.com/node/2842

And there was an article about a guy that cleaned his glow plugs regularly with ATF (automatic transmission fluid) because he ran bio diesel and glow plugs carboned up.
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Last edited by suzieque; 02-02-2010 at 08:47 PM..
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Unread 02-02-2010, 11:17 PM   #6
sbv20j
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This may be of interest

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Unread 02-03-2010, 01:27 PM   #7
tallguy6464
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Thanks for this diagram. Know any good sources for a service manual on this diesel engine?
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Unread 02-04-2010, 11:03 AM   #8
merlinTec
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Quote:
Originally Posted by sbv20j View Post
This may be of interest

where did you get this? this is incorrect it's 1 to 3 down the right side of the picture 4 to 6 down the left side. Atleast it is on UK vehicles.
Regards,
Merlin
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Unread 02-04-2010, 11:38 AM   #9
suzieque
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I didn't want to say anything, but the numbering is backwards from a North American V8 as well.
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Unread 02-05-2010, 03:59 AM   #10
sbv20j
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This was from a manual I downloaded from
SELL DOWNLOADS: Stock Photo Sales, Sell MP3s, Sell Software
Wow i wonder what else is wrong it looks like a genuine manual
I apologise if I have mislead anyone with this info









Quote:
Originally Posted by merlinTec View Post
where did you get this? this is incorrect it's 1 to 3 down the right side of the picture 4 to 6 down the left side. Atleast it is on UK vehicles.
Regards,
Merlin

Last edited by sbv20j; 02-05-2010 at 04:18 AM..
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Unread 02-09-2010, 12:08 PM   #11
tallguy6464
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So Merlin this is the correct version?

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Unread 02-09-2010, 12:10 PM   #12
tallguy6464
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Quote:
new
In case it doesn't go through.
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Unread 02-09-2010, 03:46 PM   #13
merlinTec
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Quote:
Originally Posted by tallguy6464 View Post
So Merlin this is the correct version?

Hi
Well 6 is in the same place. I have back up CD's at work that look like about when opened up so I will see if they say the same.
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Unread 03-01-2010, 09:16 AM   #14
tallguy6464
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So to recap... the #6 glow plug by what I understand is on the North Americans driver side nearest the firewall? I have checked the threads here on this site and can't seem to find one on testing these glow plugs for the do-it-yourselfer. Would a continuity test on all of them work and the one that has zero or a different resistance than the rest be the defective one? Can they be tested while still in the engine? Thanks for any advice...
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Unread 03-01-2010, 03:53 PM   #15
merlinTec
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Quote:
Originally Posted by tallguy6464 View Post
So to recap... the #6 glow plug by what I understand is on the North Americans driver side nearest the firewall? I have checked the threads here on this site and can't seem to find one on testing these glow plugs for the do-it-yourselfer. Would a continuity test on all of them work and the one that has zero or a different resistance than the rest be the defective one? Can they be tested while still in the engine? Thanks for any advice...
Yes the resistance would be different and yes you can test in place centre poll of the glow to the head.
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