Morning Folks,

 

I trust all are well?

 

With the help of the info on the forum I have managed to run some basic diagnostics on my 2013 FL Octavia Scout's air con system but fear I may have done more damage than help...

 

My air con was not blowing cold so I had it pressur tested and re filled. Tests showed no leaks and that it was down to circa 300g of gas. The re fill did not resolve my issues so I ran through some OBD Eleven bits to see what I could find:

 

I reset flap end stops which made some noises but still no air con.

 

The I tried the procedure to reset the entire air con system as if it were a new install as per:

 

 

Basic Setting

Note:*The basic setting needs to be performed, when the Climatic control module (J301) or flap motor(s) have been replaced.

Adapt flap end stops

Necessary when flap motors are replaced -or- when a self check needs to be performed for self diagnosis of faulty motors.
[Select]
[08 - Heating/Air Conditioning]
[Basic Settings - 04]
Select "Adapt flap end stops" from the drop-down list
[Go!]
The basic setting takes approximately 20 seconds.
Finished Correctly should be displayed
[Stop]
[Done, Go Back]
[Close Controller, Go Back - 06]

AC Compressor First Run-In

Necessary when the Climatic control module (J301) is replaced.
Prerequisites*to start the basic setting A/C compressor first run:

Engine at idle

Transmission in Park or Neutral

Do not cycle the ignition

Basic setting was performed for the flaps

Inside blower motor is switched on

Air vents fully open

Load management not active


"AC Compressor First Run-In" Steps:
Start engine and allow it to Idle.
Adapt flap end stops*as described above.
[Basic Settings - 04]
Select "Compressor Run In; Automatic Start" from the drop-down list.
[Go!]

It will show completed, but wait 120 sec (2 Min) and observe the flashing A/C button light on the HVAC panel.

After the Basic Settings has completed, the A/C light will quit flashing and the fault code will clear.

[Stop]
Note:*If Basic Settings reports Error the module may need to see an Adaptation change before this can be completed. Go to Adaptation and change "Driving time for compressor run in" from 120 -to- 120 and save it followed by repeating the entire procedure

Climatronic _-_-_-_-_-_-_-_-_-_-_-_-_-_-
Coding

Coding information is found using the*Long Coding Helper*while connected to the vehicle with VCDS.

When replacing a module it is recommended to save the original coding and transfer it to the new module.

Basic Setting

Note:*The basic setting needs to be performed, when the Climatronic control module (J255) or flap motor(s) have been replaced.

Adapt flap end stops

Necessary when flap motors are replaced -or- when a self check needs to be performed for self diagnosis of faulty motors.
[Select]
[08 - Heating/Air Conditioning]
[Basic Settings - 04]
Select "Adapt flap end stops" from the drop-down list
[Go!]
Activate the Basic Setting.
[ON/OFF/Next]
The basic setting takes approximately 20 seconds.
[Done, Go Back]
[Close Controller, Go Back - 06]

AC Compressor First Run-In

Necessary when the Climatronic control module (J255) is replaced.
Prerequisites*to start the basic setting A/C compressor first run:

Engine at idle

Transmission in Park or Neutral

Do not cycle the ignition

Basic setting was performed for the flaps

Inside blower motor is switched on

Air vents fully open

Load management not active


"AC Compressor First Run-In" Steps:
Start engine and allow it to Idle.
Adapt flap end stops*as described above.
[Basic Settings - 04]
Select "Compressor Run In; Automatic Start" from the drop-down list.

It will show completed, but wait 120 sec (2 Min) and observe the flashing A/C button light on the HVAC panel.

After the Basic Settings has completed, the A/C light will quit flashing and the fault code will clear.


Note:*If Basic Settings reports Error the module may need to see an Adaptation change before this can be completed. Go to Adaptation and change the Runtime (or Driving time) for "compressor run-in" basic setting from 120 -to- 120 and save it followed by repeating the procedure.



Manual heating + cooling -_-_-_-_-_-_-_-_-_-
Coding

This module does not support coding!

Basic Setting

The Manual Heating/Air Conditioning controller does not require a scan tool to perform the Basic Settings for the Activation of the A/C Compressor, please use the following instructions below.

Position the blower switch to the first or second speed

Position the air distribution control to 'Vent'

Position the interior temperature control to 'Cold', turn to the stop

Start the Vehicle's engine while in Park/Neutral

Simultaneously press/ hold the AC and Defrost buttons until the AC and recirculation buttons illuminate

Cycle the ignition and check for fault codes in the 08-Auto HVAC and proper HVAC system operation.

Special Notes

This procedure above, must be competed when:

The J301-Air conditioning system control unit is replaced.

The fault code*00898-005 will not clear.


http://wiki.ross-tech.com/wiki/index.php/B109E

 

 

Now I get the error "A/C compressor first run not performed" and now I have no green light appearing when I press the air con button....help please?!

For anyone else who lost there AC light/control from the button...found this on a Golf thread....press and hold AC button AND rear defrost button for two minutes continuously. This apparently "resets" the system...I now at least have the light back on and ac compressor coming on with the button again which is more than I found elsewhere. Back to trouble shooting why the air con is not cold.

 

https://www.golfmk7.com/forums/index.php?threads/new-climate-control-unit-coding.369130/

And another seemingly final update here for anyone struggling as much as I was to find answers in the future...found this video:

 

 

 

which allowed me to understand the "loose nut" issue more clearly and whipped off the wheel arch liner (just the bottom part is enough for this) and saw I had no bolt in the compressor at all...so with the assumption it was stripped of splines as the video shows I popped a bolt in with loctite just to see if it was actually stripped and hey presto...cold air again.

 

So before you go buying a new compressor just spend 20 minutes...wheel off, liner out and check your compressor bolt....2013 facelift Octavia Scout for posterity. 

 

If it fails again I will update here with the replacement shear plate kit the chaps in the video offer.

Also check the air temp on the dashboard, ours says -20 or something most of the time and the AC doesn't work

 

Occasionally it says the correct temp, and the AC works, next project is hunt down the dirty connection on the sensor!

Yup all good there and air con has been working fine today since the above fixes were carried out!