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Discussion Starter #1
Hi All, Ive been having this code (P0683 - 02 glow device general error) come on when starting car and staying on, but then sometimes it doesnt come on on start up, checked the 10Amp fuse and the 80amp fuse, they seem ok? is this glow plug 2 not working? as it says 2 after code? im sure last time when i had a glow plug not working it was something like glow plug circuit not present? or could it be the glow plug control unit?
any info on this please... 2011 Zafira 1.7eco a17 dtj engine
 

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Hi,

The 02 is a code for the type of failure, in this case it's signal error. The ecu is not seeing the glow plug system, could be down to a bad/loose connector/pins, fuses (which you've checked), relay or the glow module itself.
The reasons it could be intermittent are like mentioned - a loose connector, failing component like a relay or module. The other could be temperature related, the ecu checks temps on ignition to see if glow control is needed, if it's not, then the ecu wont power the glow system hence it won't know about or flag the error.
 

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Discussion Starter #3
Do I need to check all glow plugs with a multi metre? Also the connectors that go onto the glow plugs? What should my readings be ? Also how to I test the relay and where is it?
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Just checked the schematics for your engine and there is no seperate relay for glow system so it will all be down to the glow module. I'd test the coms wires for continuity between the module connector plug and the ecu connector plug (see pics for ref) if they're good You'd have to suspect the module to be at fault.
On this system it's saying the glow system should operate upto a temp of 20c so you should be good to test for power at plugs on a cold start, which should read around 11-12v.



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Discussion Starter #5 (Edited)
What does the glow module look like and where is it located
Cheers


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Discussion Starter #7
This part and number on it - I put in google and it shows it’s a relay? Would this be the fault? I’ve checked the 1st and 2nd glow plug, the plugs that go on top of the glow plugs and no power to the multi metre set at 20v when engine on and started shoes no power haven’t tried 3rd and 4th plug, I’m holding the red lead from multi metre to the glow plug lead and the black lead to the engine and tried the battery negative, doesn’t read anything, am I doing it right? Or will it only show 11-12v when cracking engine?


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Discussion Starter #12
Just tested this plug when engine switched on not started and there is 12 volt when multi metre wires are touching 7 and 3 pins



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If we work by wire colours:

Red - earth = 12 volts
Brown/Green - earth = 12 volts
Brown - earth = continuity
White/Yellow - pin 53 ecu = continuity
Green - pin 33 ecu = continuity

If all these check out ok then it's the glow module at fault.
 

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Discussion Starter #14
I take it the bigger pin on the connector is the earth ?


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Discussion Starter #15

Is the circled red pin connector the earth?


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Discussion Starter #16
Also there is 7 pins in total correct?


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Discussion Starter #17
Is brown and green separate pins same as white and yellow? So that makes 4 pins and leaves the other 3


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Brown/green is a single wire, it means brown with a green stripe. Same for white/yellow.
If you look at the back of the connector plug you'll see the wires and their colours and which terminal they belong to.
Brown is the earth, the large terminal you circled should be the red wire - main power from the 80amp fuse.
Yes 7 pins/terminals in total.
 

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Discussion Starter #19
Gotcha but there is 7 pin holes on the connector and you only listed 5 to check?


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Discussion Starter #20
I’m Confused on what I am supposed to do, do I have to touch each of them pins to earth like you have said? And what earth? On the connector or car frame?


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