VN V6 ECU Fault code 12... Help
#1 _TRRANA_
Posted 16 December 2009 - 09:54 AM
Recently Ive purchased a VN Series 2 V6 exec for 4 slabs of xxxx Gold stubbies. The owner told me the car just suddenly stopped and has has been sitting in a barn for a couple of years.
Ive been trying to start it, its getting fuel and cranks over but there appears to be no spark at all, so id thought id check the ECU for some sort of diagnosis.
After checking the ECU im getting the code 12 which tells me the operating system is all ok, but clearly theres a problem.
My questions are....
1. Because ive put a new battery in, and the ECU has cleared itself of old codes, does the motor have to be running to report any new faults hence why im getting code 12?
2. Can the ECU give incorrect readings because maybe its the crank angle sensor?
3. If the coil pack is stuffed, ive been told the ECU wont report the fault is that true?
Im hopin to not spend any money (or very little) on this piece of crap! so i dont wana buy this and that for it if it doesnt end up starting.
Today im gonna get under the bonnet and check all my earths and clean all the plugs to see if that works.
Cheers.
Dorzy
#2
Posted 16 December 2009 - 10:17 AM
at a guess just suddenly stopping id say replace the crank angle sensor unless all 3 coil packs died at the same time i dont think it would be them
check if ya getting fuel then check if ya getting spark
you probably wont have spark from the soundsof it so then just a process of elimination see whats getting power
#3
Posted 16 December 2009 - 10:52 AM
Does this car have the one piece coil pack and module or are the three coils separable?
To test for spark use a spare plug or take one out, plug a lead into it then earth the plug to the motor with a jumperlead etc and crnk the motor.
IMO get to the wreckers and pick up a cheap Coil module or if it is a keeper spend a few dollars and convert it to the three separate coil set up if it has the single pack.
#4
Posted 16 December 2009 - 11:00 AM
#5
Posted 16 December 2009 - 11:13 AM
Replaced the coil packs and still had a problem.
Ended up having to replace the bit that the coil packs sit on.
I'm pretty sure we got an error code though.
Good luck mate.
#6
Posted 16 December 2009 - 11:14 AM
Ended up having to replace the bit that the coil packs sit on.
I'm pretty sure we got an error code though.
Good luck mate.
That would be the Module. No error code AFAIK.
#7 _Woodsy_
Posted 16 December 2009 - 11:14 AM
#8
Posted 16 December 2009 - 11:32 AM
Ended up having to replace the bit that the coil packs sit on.
I'm pretty sure we got an error code though.
Good luck mate.
That would be the Module. No error code AFAIK.
Yep, thats the one. You are probably right about the code. It had a problem with the transmission around the same time so that could be the code I was thinking of.
#9
Posted 16 December 2009 - 12:10 PM
AFIK you should get Code 46 for the crank sensor while cranking if it fails.
41 is crank angle sensor. 46 is Ignition module.
#10
Posted 16 December 2009 - 12:39 PM
also a quick look at that pic i would say its a vp
#11
Posted 16 December 2009 - 01:15 PM
#12
Posted 16 December 2009 - 01:17 PM
AFIK you should get Code 46 for the crank sensor while cranking if it fails.
41 is crank angle sensor. 46 is Ignition module.
Correct, Code 41 is CAS VN-VP, Code 46 is CAS VR on, sorry for the confusion.
AFAIK Module/coil etc do not send a signal to the ECU, when cranking, this is Code 12, as opposed to the motor running, which, if no faults persent, will show Code 12 aswell. Only things such as a faulty CAS will show on cranking or intermitant CAS will show Code 41 running.
Edited by TerrA LX, 16 December 2009 - 01:19 PM.
#13
Posted 16 December 2009 - 04:54 PM
#14 _TRRANA_
Posted 17 December 2009 - 10:55 AM
Give the multi-pin plug at the D.F.I module a good wiggle while you crank it.
Gave it a wiggle and started straight away!!!! took it for a skid and it runs nicely!!!
its an 89 VN dressed up as a VPYeah vp. Why didn't i notice that.
Thanks fellas for all your help, much appreciated!!!
#15
Posted 17 December 2009 - 10:58 AM
Now, undo the little bolt, 7mm from memory, and clean the terminals in the plugs with a Co2 (i think thats what they call it) type of cleaner. Spray it in, assemble the plug, wiggle wiggle and repeat a few times. Lastly spray with a WD40 type of stuff, dry off excess and reassemble.
The little terminals corrode over time.
Also, check that the earth wire under the D.F.I module mount plate is clean and tight at it's connections.
1 slabs of xxxx Gold stubbies
Edited by rodomo, 17 December 2009 - 11:00 AM.
#16 _TRRANA_
Posted 17 December 2009 - 11:30 AM
Great!
Now, undo the little bolt, 7mm from memory, and clean the terminals in the plugs with a Co2 (i think thats what they call it) type of cleaner. Spray it in, assemble the plug, wiggle wiggle and repeat a few times. Lastly spray with a WD40 type of stuff, dry off excess and reassemble.
The little terminals corrode over time.
Also, check that the earth wire under the D.F.I module mount plate is clean and tight at it's connections.
1 slabs of xxxx Gold stubbies
after i got it goen i pulled the plug out and inspected it and it was a tad dirty, and also filed the crap off both ends of the earth lead.
Yeah thanks mate i owe ya a few beers
#17
Posted 17 December 2009 - 02:17 PM
First I would check the connection between the module and the loom.
Does...
Glad you got it sorted.
#18
Posted 17 December 2009 - 02:28 PM
I'll settle for a six pack.
#19 _TRRANA_
Posted 17 December 2009 - 11:15 PM
First I would check the connection between the module and the loom.
Does...
Glad you got it sorted.
Cheers too mate! (gotta habit of skimming too fast thru posts)
#20
Posted 18 December 2009 - 06:15 PM
Makes it an awesome pickup!!
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