[Vwdiesel] 2006 golf tdi glow plug question

[Dave Cook]

Do the newer ones use a separate harness for each plug so the computer can tell which one is burnt out?

On an 01 Jetta I worked on once, it had four good plugs, but a couple different brands.  Those cars, the computer "weighs" the resistance of 1 and 2 vs 3 and 4 to determine if one is bad.  (So if 1 was burned out, then that side of the "scale" would be way off compared to the 3/4 side.)

In that car, the resistance of one brand of plug was slightly different than the other, which tipped the "scale" enough to trip the light even though all four plugs were fine.

So I simply swapped plugs 2 and 3 in their holes and the problem was solved.

 
Dave Cook


________________________________
 From: Tad <tadc at europa.com>
To: Travis . <tgott at hotmail.com> 
Cc: vwdiesel at vwfans.com 
Sent: Friday, July 27, 2012 7:09 PM
Subject: Re: [Vwdiesel] 2006 golf tdi glow plug question
 
Thanks for the correction Travis... clearly my TDI knowledge base is
getting dated. :)

On Fri, Jul 27, 2012 at 1:23 PM, Travis . <tgott at hotmail.com> wrote:
>
> DON'T PUT 12 VOLTS TO THE 06 TDI GLOW PLUGS. I know my 04 and my brothers 05 are at 7 volts and my first recall knocked it to 5 volts and then back up to 7 volts on the second recall. This will have the BEW engine in it so it will likely be the 7 volts and it will burn them up if you put 12 on them. The ALH had the 12 volt and some tuners can make 12 go to the plugs if you want/need to switch from what I have heard.
>
> Test with an ohm meter. If one is off the wall it is bad. The computer code will tell you which one is bad though if you can get the code. But the glow plugs are listed in oposite order of the cylinders so #1 cylinder has #4 glow plug. Please correct me if I am wrong but I remember something like that. It is also VERY common to have the harness go bad overtime. Both brother and I needed to replace our harnesses. If the plugs check out then that is your problem as it doesn't take much difference in resistance for the computer to sense something is wrong and through a code up.
> Travis G
>
>> Assuming the 2006 is similar to the older ALH engines.. the easy way
>> is to pop off the harness and check each plug with an ohmmeter
>> (between the end of the plug and ground). You should read about 1
>> ohm, plus or minus say 20%. As long as they aren't open or shorted
>> you're probably fine.
>>
>> The harder but more reliable way is to take each plug out and power
>> them with 12v. Don't burn yourself, and watch to see that they glow
>> properly along the full area of the tip.
>>
>> If the code is "intermittent" it's probably a bad/dirty connection in
>> the harness. A bad plug should stand out as very different ohm
>> reading from the rest.
>>
>> There's a good how-to on the TDIClub but you'll have to find it yourself... :)
>>
>> Oh wait, here it is: http://forums.tdiclub.com/showthread.php?t=79819
>>
>> On Thu, Jul 26, 2012 at 10:51 PM, <dhanew at yahoo.com> wrote:
>> >
>> > My friend has a 2006 Golf TDI and he wants to check his glow plugs and the harness to make sure if it's okay as he has a code that comes up as their is a problem with the glow plug system. Does someone have a good how to guide to do this.
>> >
>> > Thanks,
>> >
>> > Dave
>
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