Swapped B6 climatronic module to B6/B7 - WTF

[Old Navman]

Greetings,


Swapped B6 climatronic to B6/B7 as the temp dial was playing up. Physically an easy job however I'm slightly confused about the newer B7 unit settings. In the B6 when the yellow ECON light was ON the A/c was OFF. When the the ECON light was OFF the A/c was actualy ON. With A/c ON I was getting good temp. out readings - say around 4-6C.


my old B6 climatronic

B7 unit - with the light OFF it says the A/c is OFF (opposite to B6). With the yellow A/c light ON the unit is showing ON - again opposite to the B6. Perhaps I'm confusing here this yellow light with the B6 yellow ECON light.

So, Ok I could understand the B7 uses different approach here but how do you explain that now whether with A/c ON or OFF the best cooling I get is 10-12C? So, with the temp selection set to minimum (low) even now in winter I can not get much in the way of cold air coming out. I should add that I did read few of the climatronic related posts and upon fitment I did run HVAC reset & calibrate program.


B6/B7 unit

The other thing I noticed is that with one of the A/c settings (ON or OFF I can't remember which one now) there does not seem to be any air coming out of the centre consol face air outlets. Any ideas?

Cheers

[MIG]

The lighting logic for the new console is correct; B7 light on = AC on.

Did you update the coding at all? I think most of the B7s used variable output compressors without a clutch, and the older generation used the traditional mag clutch arrangement.

[Old Navman]

The lighting logic for the new console is correct; B7 light on = AC on.

Did you update the coding at all? I think most of the B7s used variable output compressors without a clutch, and the older generation used the traditional mag clutch arrangement.

No, have not coded anything. I have not had to connect the VCDS in a long while so can you point me where I should be looking and what coding I need to change? BTW I have not changed the a/c compressor unit itself only the climatronic control.

[MIG]

Just do an auto scan of the car and see if you get any results under the 08-AutoHVAC
There is a compressor run-in procedure that needs doing, too, if the module is replaced.

Check out this guide here VW Golf (5K) Climatic - Ross-Tech Wiki

[Passat my07]

The b6 has the variable compressor too. No clutch.

[Old Navman]

Just do an auto scan of the car and see if you get any results under the 08-AutoHVAC
There is a compressor run-in procedure that needs doing, too, if the module is replaced.

Check out this guide here VW Golf (5K) Climatic - Ross-Tech Wiki

I'll check it out - thanks.

[Old Navman]

I've done the flap adaptation & compressor run in. It completed successfully. During the calibration steps I could see the (low) temperature going down to about 4C. Strangely, now when I turn the dial to LOW the cold output seem to be only about 8-10C but if I select 18C it goes down to about 4C. Maybe the climatronic module I have is jinxed

[sn809]

I've done the flap adaptation & compressor run in. It completed successfully. During the calibration steps I could see the (low) temperature going down to about 4C. Strangely, now when I turn the dial to LOW the cold output seem to be only about 8-10C but if I select 18C it goes down to about 4C. Maybe the climatronic module I have is jinxed

From memory it had something to do with high speed fan and temp that is low but not maximum low.
4 C might be the lowest but car cannot achieve it with a high fan speed.

I could be wrong though, good job switching.

[Old Navman]

From memory it had something to do with high speed fan and temp that is low but not maximum low.
4 C might be the lowest but car cannot achieve it with a high fan speed.

I could be wrong though, good job switching.

I know what you're saying - the lowest temp possible should be with selector set to LOW and fan @minimum speed. Those above temps were, of course, measured while driving.

[Old Navman]

I'm still not getting the correct airflow from the B7 Climatronic unit despite many attempts to re-set it. So I'm wondering whether the following errors could explain why it's not doing what it suppose to.

Not sure if this is correct but I've read somewhere that when you upgrade from B6 to B7 Climatronic you might either have to change the existing coding or in fact add a brand new coding (a bit or a byte so that the system recognizes the new Climatronic unit. Has anybody come across this sort of problem?


The following faults are from the scan log I've uploaded in my other (fuel gauge problem) post.
--------------------------------------------------------------------------------

Address 08: Auto HVAC (J255) Labels:| 5K0-907-044.clb
Part No SW: 5K0 907 044 EA HW: 5K0 907 044 EA
Component: Climatronic H17 1010
Revision: 00003001
Coding: 0000001002
Shop #: WSC 01324 020 00200
ASAM Dataset: EV_Climatronic A01010
ROD: EV_ClimaAutoBasis_VW46.rod
VCID: 6ED37BBFB1970CF4E1-803A

1 Fault Found:
13701456 - Function Restricted due to Missing Message(s)
U1111 00 [009] - -
[New feature! Extended UDS fault detail is only supported by current gen. interfaces]
Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 6
Fault Frequency: 1
Reset counter: 104
Mileage: 350514 km
Date: 2023.07.31
Time: 11:08:28

-------------------------------------------------------------------------------

Address 19: CAN Gateway Labels:. 3C0-907-530-V3.clb
Part No SW: 3C0 907 530 Q HW: 3C0 907 951
Component: J533 Gateway H13 0172
Revision: H13 Serial number: 3640P151190AC5
Coding: FD82FF4F00020200F103
Shop #: WSC 12345 123 12345
VCID: 2F6DA6BBBE1D45FCAA-807A

2 Faults Found:
01320 - Control Module for Climatronic (J255)
004 - No Signal/Communication - Intermittent
Freeze Frame:
Fault Status: 00100100
Fault Priority: 2
Fault Frequency: 254
Reset counter: 144
Mileage: 347974 km
Time Indication: 0

disreagrd this fault
01517 - Control Module for Trailer/Towing Sensor (J345)
004 - No Signal/Communication - Intermittent
Freeze Frame:
Fault Status: 00100100
Fault Priority: 2
Fault Frequency: 254
Reset counter: 144
Mileage: 347974 km
Time Indication: 0