Aux Heater

[davewill]

OK, it was -1c this morning when i started the Gal (Mkll 2006 1.9TDI)

 

Drove the kids to school and got back home after about 5 miles. The water temp guage was on normal, and there was heat coming through the vents, but there ws no "jet engine" noise when i got home, so i assume the Aux Heater is not working?

 

It was firing up about 2 months ago when we had a cold spell, but nothing today

 

Anyone in the Shrops, Staffs or South Cheshire area who has Vag Com, and would be willing to run it on the Gal for me, just to see first if error codes are being reported?

 

Cheers Dave

[sotal]

If I disable my Aux heater and drive 5 miles at -1c then my temp guage would barely move and the car would be freezing.

 

I recently tested this although it was more like 5 or 6*C outside, It took 15 mins of driving to get the coolant temp up to about 75*C without the aux heater. With the Aux heater running after about 5 mins it is up to normal temp.

 

 

Are you sure it hadn't run then cut out? Is your aux coolant pump working - if this isn't working the aux heater could be overheating and cutting out.

[gregers]

next time you drive it,and then stop jump out and grab hold of the unit,if you BURN YOUR HAND THEN YOU KNOW ITS WORKING:lol:

as sotal has said maybe it got up to temp and cut out like it should.

[davewill]

Sotal / Gregers, thanks for your replies

 

0c this morning, and this time i drove just a mile or so down the road and then got out

 

No Jet Engine noise, and little pipe under the side of the car stone cold

 

Therefore i assume something is knack'd

 

Apart from taking it to Frauds, whats the quickest and easiest way to establish if there is a problem, and what that problem is??

 

Sorry of this is "basic" stuff, but i am certainly no mechanic!!

 

Thanks, Dave

[sotal]

Hmm, seems strange how you managed to warm the engine up without it.

 

Anyway - best way will be as you said in your original post, you need someone with VCDS who will plug in the cable and read / clear the faults. Then you need to use the car for a bit and see if the faults come back.

 

I'm a bit too far to help you with reading the faults (Staffordshire) but personally providing you have access to a laptop I would recommend just buying a cable, they only cost about a tenner from ebay, and the VCDS Lite software is Free. You can then use it for a whole host of things and if the aux heater proves to be a bit problematic you may need to read the codes every few days until you've sorted it.

 

If you need help setting the cable up just ask, I'll talk you through it or there are plenty of other members who will know how to talk you through it.

[davewill]

Sotal

 

Thanks again

 

I've just spoken to my Brother in Law who has Vag Com and a cable, (didn't know this) so i am going to let him run the test tomorrow afternoon and see what faults come up

 

Are there any specific codes / descriptions we should look for in terms of Aux Heater failure / faults etc

 

If you could let me know i will take them along when by BIL runs Vag Com

 

I will note any codes that do come up and post back on here after tomorrow. Hopefully you can advise from this

 

Thanks again, Dave

[sotal]

When you run VCDS, you will need to go to modules then number 18 for Aux Heater, once it has connected to your aux heater, press the read codes button, this will give you the codes on screen, and if it's only a couple it will tell you what they are.

 

If it's something like Flame Out errors, then if you clear the fault codes it may work (it locks out after a certain number of failures). If this error keeps returning without firing the heater up then the glow plug is probably ready for renewal.

 

With yours being a 2006 it's probably the newer version of the aux heater, there is a post on here where somebody has stripped one down and taken photos.

 

 

Best thing at this point is to run VCDS, and write down all the codes with as much detail as possible (if it's your laptop you can save them to a file, or copy to clipboard then paste into word etc). Then clear the codes, and run the car for a while. Then run VCDS again and see if any codes have returned.

 

Then come back here and post your results

[davewill]

Have run VCDS this afternoon and it has thrown up the following error under module number 18 for Aux Heater

 

65535 Internal Control Module Memory Error

 

There were 5 instances of this error, so we cleared them all

 

So, is the error message serious or do you think the Aux Heater will fire up after this reset??

 

If it is "serious" what will need replacing and hpow much do you think it will cost??

 

Cheers guys

[George106]

Have run VCDS this afternoon and it has thrown up the following error under module number 18 for Aux Heater

 

65535 Internal Control Module Memory Error

 

There were 5 instances of this error, so we cleared them all

 

So, is the error message serious or do you think the Aux Heater will fire up after this reset??

 

If it is "serious" what will need replacing and hpow much do you think it will cost??

 

Cheers guys

 

 

It seems to me like another faulty control module.If the heater after clearing these codes is throwing them again, you are another owner looking for control module.

[davewill]

Thanks George

 

I have searched around a bit on the forum and FAQ's but cant fins anything specific to "65535 Int Control Module Memory error"

 

Could you please enlighten me on repairs necessary, and rough costs?? (To be done at a Garage)??

 

Thanks

[davewill]

Thanks George

 

I have searched around a bit on the forum and FAQ's but cant fins anything specific to "65535 Int Control Module Memory error"

 

Could you please enlighten me on repairs necessary, and rough costs?? (To be done at a Garage)??

 

Thanks

 

 

Sorry i have looked again, and found a few mentions of controller module

 

My question still applies though, what sort of cost is it to get a garage to do the repair (or replace) of the Control Module (Mkll 2006 model 115tdi)

[Mirez]

Garage prices, probably

[davewill]

Guys

 

Could it just be that the fuse has blown which stops the Aux Heater working and throws up error code 65535, or is that simplistic thinking and way too cheap to imagine???

 

If it could be the fuse which number fuse should i change?

 

Thanks, Dave

[sotal]

If the fuse had blown, then I don't think you'd get any diagnostics at all, IIRC 65535 is used on all ECU's as an unexplainable internal error. So this could be a whole host of things that doesn't bring up a fault, the ECU is the most common. If it clears then it might not be that bad, usually if they've gone then the code comes back straight away. See what happens monitor it for a few days and report back.

 

You've got the later model and the ECU failure seems common on these, I've seen prices quoted as

[BrummyGit]

Was there any further progress on this fault - I've had the same code pop up on mine a couple of times and I must admit I was wondering if it was caused by my "eBay special" VCDS cable or if my Aux Heater is on its way?