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"Crunch" noise heard during cruising


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#1 OFFLINE   xrbeast

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Posted 12 May 2018 - 10:12 AM

I have a 2014 tiguan 103tdi, 7sp dsg. I noticed a short "crunch" noise during the first few minutes of all my drives. Faint but noticeable. It only comes on once in all my drives. Happens when cruising and not during acceleration with gear changes.

It sounded like when u crank in into a gear without properly clutching in, in a stick shift car. It also sounded like a actuator actuating something.

Anyone has any clue on this? Thks

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#2 OFFLINE   Yooj

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Posted 18 May 2018 - 01:46 PM

Might just be the ABS check, which is nothing to worry about.

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#3 OFFLINE   shawng

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Posted 18 May 2018 - 03:59 PM

ABS check? Our cars do no such thing. 


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#4 OFFLINE   Cupidstunt79

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Posted 18 May 2018 - 04:36 PM

On my car I’ve got brake disc wiper turned on, when its raining it applies the brakes very slightly for you to keep the disc clean and dry, when I haven’t driven my car for a week and it’s raining, for the first little while I get a noticeable crunchy sort of sound from the brakes where the surface rust is being by the brake pads, it’s almost a metal on metal sound

#5 OFFLINE   shawng

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Posted 18 May 2018 - 10:09 PM

Wiping should only happen if your wipers are on (that’s how it knows it’s raining). Still not an ABS test

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#6 OFFLINE   Cupidstunt79

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Posted 18 May 2018 - 10:18 PM

Wiping should only happen if your wipers are on (that’s how it knows it’s raining). Still not an ABS test


I never said it was?
I was offering a suggestion to the op

#7 OFFLINE   dougie175

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Posted 20 May 2018 - 07:13 PM

I have a 2014 tiguan 103tdi, 7sp dsg. I noticed a short "crunch" noise during the first few minutes of all my drives. Faint but noticeable. It only comes on once in all my drives. Happens when cruising and not during acceleration with gear changes.

It sounded like when u crank in into a gear without properly clutching in, in a stick shift car. It also sounded like a actuator actuating something.

Anyone has any clue on this? Thks

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Heard this noise before on another car and it turned out the be linked to the AC compressor not exactly sure what the issue was or is but maybe 1 of the clever chaps on here could offer more info on why an AC Compressor would randomly make a noise like this. Trying to remember back as it was a few years ago but from what I recall it sounded just as if you had tried to change gear without putting the clutch pedal in far enough, the noise only lasted for 1-2 seconds and then went silent in this case.

 

Does sound exactly like the noise you are experiencing though



#8 OFFLINE   xrbeast

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Posted 26 May 2018 - 04:20 AM

Thanks. I will try driving with the aircon off and see whether it happens.

Heard this noise before on another car and it turned out the be linked to the AC compressor not exactly sure what the issue was or is but maybe 1 of the clever chaps on here could offer more info on why an AC Compressor would randomly make a noise like this. Trying to remember back as it was a few years ago but from what I recall it sounded just as if you had tried to change gear without putting the clutch pedal in far enough, the noise only lasted for 1-2 seconds and then went silent in this case.

Does sound exactly like the noise you are experiencing though


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#9 OFFLINE   dougie175

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Posted 26 May 2018 - 07:29 PM

Thanks. I will try driving with the aircon off and see whether it happens.
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I had a word with him about this he said it only used to happen once at lower speeds, usually on a warm day with the aircon on full blast, then when he turned the fan speed down but still left the heater on "low" that's most often when he got the crunch



#10 OFFLINE   xrbeast

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Posted 31 May 2018 - 11:43 AM

Nope. It is not the aircon. The noise still happens with the aircon off. I ran a test on the VCDS and no fault codes.

This noise is really driving me nuts.

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#11 OFFLINE   xrbeast

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Posted 03 June 2018 - 10:06 AM

The noise always come on at a specific speed range ( 55 to 57km/h) and at a steady speed, almost sounded like it is doing a self check function, first time it reaches that range in any driving session.

If i avoid that range during my drive, i won't hear it. Oh man.. i am still curious to know what it is.

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#12 OFFLINE   dougie175

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Posted 03 June 2018 - 01:55 PM

Have you got access to VCDS or similar diagnostic? May be worth uploading a log and letting some of the experts take a look it if it throwing codes or maybe even a software fix or something!



#13 OFFLINE   xrbeast

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Posted 06 June 2018 - 10:12 AM

I've ran VCDS. No codes at all.

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#14 OFFLINE   dougie175

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Posted 06 June 2018 - 10:22 AM

Please post your scan to see what hardware and software your car has.

You may find this topic interesting it sounds worryingly similar to yours http://forums.ross-t...ion-Noise/page2

#15 OFFLINE   xrbeast

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Posted 09 June 2018 - 02:09 AM

Thanks dougie175, This is a great lead to the possible cause of the noise. Symptoms are spot on.  Anyway, to further add on my findings, the noise will not come on when i am in sport mode or when i am on "manual" mode. 
 
 
My hardware details are as follows in black, the one in red is from the guy in Ross-tech forum who is facing the same issue (code before transmission replacement).  Looks like the same component. But his does not have the revision details and the part no is different. I will contact Volkswagen, my car is a 2014 model, i hope i still have the drivetrain warranty.
 
-------------------------------------------------------------------------------
Address 02: Auto Trans (J743)       Labels:. 0BH-927-711.clb
   Part No SW: 0BH 300 012 A    HW: 0BH 927 711 C
   Component: DSG DQ500-7A  H08 2236  
   Revision: 00H08V01    
   Coding: 0014
   Shop #: WSC 00000 000 00000
   ASAM Dataset: EV_TCMDQ500021 001001
   ROD: EV_TCMDQ500021_VW36.rod
   VCID: 214E3EC63052AA4C37-8074
 
No fault code found.
 
------------------------------------------
<from ross-tech forum guy>
 
Address 02: Auto Trans (J743) Labels: 0BH-927-711.clb
Part No SW: 0BT 300 011 Q HW: 0BH 927 711 C
Component: DSG DQ500-7A H08 2264
Coding: 0014
ASAM Dataset: EV_TCMDQ500021 001001
ROD: EV_TCMDQ500021_VW36.rod
VCID: 3C34F5BEB79613DCA8-8068

No fault code found.
 


#16 OFFLINE   dougie175

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Posted 09 June 2018 - 07:44 AM

 

Thanks dougie175, This is a great lead to the possible cause of the noise. Symptoms are spot on.  Anyway, to further add on my findings, the noise will not come on when i am in sport mode or when i am on "manual" mode. 
 
 
My hardware details are as follows in black, the one in red is from the guy in Ross-tech forum who is facing the same issue (code before transmission replacement).  Looks like the same component. But his does not have the revision details and the part no is different. I will contact Volkswagen, my car is a 2014 model, i hope i still have the drivetrain warranty.
 
-------------------------------------------------------------------------------
Address 02: Auto Trans (J743)       Labels:. 0BH-927-711.clb
   Part No SW: 0BH 300 012 A    HW: 0BH 927 711 C
   Component: DSG DQ500-7A  H08 2236  
   Revision: 00H08V01    
   Coding: 0014
   Shop #: WSC 00000 000 00000
   ASAM Dataset: EV_TCMDQ500021 001001
   ROD: EV_TCMDQ500021_VW36.rod
   VCID: 214E3EC63052AA4C37-8074
 
No fault code found.
 
------------------------------------------
<from ross-tech forum guy>
 
Address 02: Auto Trans (J743) Labels: 0BH-927-711.clb
Part No SW: 0BT 300 011 Q HW: 0BH 927 711 C
Component: DSG DQ500-7A H08 2264
Coding: 0014
ASAM Dataset: EV_TCMDQ500021 001001
ROD: EV_TCMDQ500021_VW36.rod
VCID: 3C34F5BEB79613DCA8-8068

No fault code found.
 

 

 

Hmmmm well I would have suggested trying to update your software for the DSG as per my guide http://www.mytiguan....h-a-dsg-module/ or asking VW to do it for you, but you are already running the latest version that I just updated too.

 

The fact it will only do it with a single ignition cycle and if you control what gear it is in it also won't do it makes me think it is software based rather than hardware based. If there was a real hardware fault in theory it should always do it. But if it was a software glitch why is every Tiguan owner not experiencing the same as you.

 

If you have warranty I would take it into VW and get it looked at ASAP before your warranty expires



#17 OFFLINE   xrbeast

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Posted 15 June 2018 - 10:33 AM

I've found out that some users of Multivan T5 DSG also experienced the same problem. See links below.

 

https://www.youtube....eature=youtu.be

 

http://www.vwt4forum...d.php?t=1138425

 

Turns out all it requires is a DSG update/reset. Will be heading down to the dealer for a reset. Not comfortable in doing the reset myself.



#18 OFFLINE   dougie175

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Posted 15 June 2018 - 05:46 PM

I've found out that some users of Multivan T5 DSG also experienced the same problem. See links below.

https://www.youtube....eature=youtu.be

http://www.vwt4forum...d.php?t=1138425

Turns out all it requires is a DSG update/reset. Will be heading down to the dealer for a reset. Not comfortable in doing the reset myself.


You've already got the latest software as far as I know. What does the reset involve is it not something you can do yourself to avoid dealership costs? Disconnecting good battery for a while will doo what I would call a reset where by you'll loose the data your gearbox has built up about your driving style. I can't see this fixing the issue of the gearbox trying to select a gear without deselecting another gear though you be honest

#19 OFFLINE   xrbeast

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Posted 15 June 2018 - 11:10 PM

There are plenty of DSG problems solved by a DSG reset. So no harm in doing that. I did mention going to the dealer for a reset and not a diy battery off reset.

Thanks for your opinion anyway.

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#20 OFFLINE   dougie175

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Posted 16 June 2018 - 06:15 AM

There are plenty of DSG problems solved by a DSG reset. So no harm in doing that. I did mention going to the dealer for a reset and not a diy battery off reset.

Thanks for your opinion anyway.

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Yes DSG problems can be fixed by software alone is the software is at fault or has a glitch in it. My question is what is a DSG reset?

 

Do you mean adapt basic settings? If so I can see this could help with this sort of crunch noise. As you have VCDS there really is no reason not to do this yourself though, I completed the process last week after doing my software updates, its as simple as start the car, allow it to idle push the brake and press a few buttons on VCDS. I took the risk as there was no confirmed process for our gearbox but it worked perfectly so can see no reason why the same process wont work for yourself:

 

gallery_105394_1682_67149.jpg
 

This is the basic settings procedure:

 

Prerequisites:
Transmission fluid temperature between 30°C - 100°C confirmed using Advanced Measuring Values:
** IDE00102 Control Module temperature
** IDE00024 Transmission fluid temperature

Selector lever in Park

Engine idle speed, do not press accelerator pedal

Parking brake and foot brake applied during the entire procedure. This can be confirmed using Advanced Measuring Values:
* IDE02713 Brake Light Switch
* IDE02714 Brake test switch

0D9 – DQ500 - Basic Settings Procedure:
[Select]
[02- Auto Trans]
[Basic Settings-04]
Select [Basic settings of transmission]
[Show Measuring Data] and select:
* IDE00021 Engine speed
* IDE00322 Status of basic setting
* IDE00024 Transmission fluid temperature
[Go!]

- During the basic setting procedure, there may be some loud gear shifting noises from the transmission, this is normal.

Basic settings may not complete successfully if:
- The fluid temperature gets too hot.
- Brake is released
- Engine RPM is increased

Once complete, there should be an indication of this in the [Status of Basic Settings] Advanced Measuring Value group and Basic Settings should report Finished Correctly.. 

[Done, Go Back] and Check for fault codes. If you have several Intermittent fault codes stored please [Save] them before clearing

 

Once this procedure has finished you will be left with a screen that looks something like this

 

gallery_105394_1682_48282.jpg






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