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VW MKIV-A4 TDIs (VE and PD) This is a general discussion about A4/MkIV Jetta (99.5-~2005), Golf(99.5-2006), and New Beetle(98-2006). Both VE and PD engines are covered here.

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Old October 30th, 2013, 08:33   #16
Votblindub
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Is there any coolant creep?
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Old October 30th, 2013, 08:52   #17
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Quote:
Originally Posted by Powder Hound View Post
Or the quickest easiest test of all, which is to use a screwdriver or similar metal implement and just short the wire fastened on top of the fuel cutoff solenoid to the IP body. Shuts off in 1 second or less. That's the current method of shutdown for the moment.
That rules out my theory about the fuel cutoff solenoid getting stuck in the ON position. Your fuel cutoff solenoid appears to be good. If everything else checks out OK, maybe a problem with the ECU itself?

If the car has a manual transmission, a clutch dump while in 5th gear will shut it down quick.
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Old November 5th, 2013, 08:59   #18
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I still think 12V is migrating to the ignition side.

With the key off (and engine keeps runing) push the gas pedal. Does the engine rev more? If so, the ECU is being kept alive by some stray 12V source. If it does not react, you have 12V migrating only to the fuel cut off solenoid.
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Old November 5th, 2013, 11:26   #19
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Powering the solenoid alone won't keep the engine running. The ECU sets the IQ to zero to shut off the engine. You can take the plunger out of the solenoid and the engine will stop just fine.
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Old November 5th, 2013, 18:46   #20
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Is the dashboard still on? Can you drive with the key out?

Maybe it knows it's demise is soon, and it's to live as long as it can... You did say it was an auto, afterall.
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Old November 6th, 2013, 05:51   #21
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How's the oil level holding? Maybe the engine is not running on diesel fuel when the ignition is off.
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Old November 6th, 2013, 08:50   #22
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If that were the case, shorting the fuel cutoff solenoid to shut down the engine would not work.

The oil level is fine, though.

Can't try driving in key-out mode because removing the key locks the transmission in park. I should get out there and see if the go-pedal changes things.
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Old November 6th, 2013, 12:23   #23
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I missed in the first post that you already replaced the key switch.

So, you kill the engine and disconnect the battery. Now you go to restart and connect the battery. What happens?

Does the dash go through its normal test mode and do the plugs cycle, assuming it's cold enough? Or is everything dead until you turn on the key?
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Saying no to gas for 25 years:

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The Black Sheep (Only gasser): 85 CJ, 4.2 w/4.0 Head and Mopar FI.

Past: 85 Mitsubishi PU, 4D55T; 81 Rabbit, 1.6; 80 Dasher, 1.5; 79 Rabbit, 1.5
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Old January 27th, 2015, 21:15   #24
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Ever figure this out? I'm having exact same issue after a tdi swap. Post 46

http://forums.tdiclub.com/showthread...49#post4724449
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Old February 17th, 2019, 07:41   #25
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Hey folks!
My 2005 BEW TDI starts and runs great, but around a month ago the car engine stopped turning off when I turn the key to the OFF position. The only way to kill the engine is to open and then close my door (i dont understand why). Also, if another door is open (for example, if the passenger opens their door before I close mine, the car won't shut off). I need to open at least one door, then have all doors close in order to shut off the engine. So far this isn't actually a problem for me, since I know how to kill the engine, but I would like to resolve this since I know it's not normal.
Any help is greatly appreciated
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Old February 17th, 2019, 08:04   #26
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from limited understanding I'd be looking for anything that takes power from both the load reduction relay and also n109 relay
start pulling fuses until you find the component that is bridging power over
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Old February 19th, 2019, 02:22   #27
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Hi,
I had the same problem years ago, the solution was a diode somewhere near the alternator.
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Old February 19th, 2019, 18:34   #28
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I couldn't find a diode in the charging system other then those inside the alternator.

There's 2 diodes in the daytime running lights relay.
It might feedback through fuse 5.
Try pulling the relay and see if the problem goes away.
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