Power loss - Climatronic malfunction - Golf Variant AFN 110

Hi,

I know this isn't a new topic. But I haven't been able to find a solution. I've been searching the entire internet for a year. Here's the problem: First, I had intermittent power loss, and after clearing the error codes, everything was fine again. I've already replaced the turbocharger, mass airflow sensor, and diesel filter. Well, now none of that helps anymore; I only have power loss. Second, the Climatronic system is giving errors, the display is blinking, and then I get the message "HE." The fuse blows (the 4th fuse is also for the rear wipers), and the air conditioning no longer works; it only functions as a fan. Even VW couldn't fix it. Please, please help me. I am receiving the following error messages:

Vehicle model: 1H - VW G/J/V Mk3
Scan: 01, 02, 03, 08, 15, 25, 56

Address 01 -------------------------------------------------------
Control unit: 028 906 021 GH
Part: 1.9L R4 EDC, part number G00SG, 1425.
Encoding: 00002
Workshop code: xxxxxxxxx
Sure, here is the translation of the text from German to English:

"1 error found:"
01237 - Fuel shut-off valve (N109)
04-00 - mechanical fault.
Readiness: Not available.

Address 03 -------------------------------------------------------
Control unit: 3A0 907 379 D
Component: ABS ITTAE 20 GI V00
Encoding: 03704
Workshop code: xxxxxxxx
No error code found.

Address 08 -------------------------------------------------------
Control unit: 1H0 907 044 A
Component: CLIMATRONIC, Version 22.
Sure, here is the translation of the text from German to English:

"1 error found:"
00796 - Blower for temperature sensors (V42)
35-00 - -

Address 15 - Airbags are being ignored.

Address 25
-------------------------------------------------------
Control unit: 1H0 953 257 B.
Part number: IMMO VWZ3Z0V4011070 V00
Encoding: 09600
Workshop code: xxxxxxxxx
Sure, here is the translation of the text from German to English:

"1 error found:"
00546 - Data line fault.
27-00 - implausible signal.

End.

Hello,

I don't quite understand the problem, but I would start troubleshooting there.

Quote:

Fuel shut-off valve (N109) 04-00 - mechanical failure

and

Quote:

Blowers for temperature sensors (V42)

Best regards, Rainer.

hi,



Here's the problem.


Okay, here's the translation:

"First, I experienced intermittent power loss, but after clearing the error codes, everything seemed fine again. I replaced the turbocharger, mass airflow sensor, and diesel filter. Well, now none of that matters because I'm still only experiencing power loss. Second, the climate control system is giving an error; the display is blinking, and then I get the message "HE"." The fuse blew (the 4th fuse is also responsible for the rear wipers). The air conditioning is no longer working and can only be used as a fan.



"Thank you."
[/quote]

I have simply repeated the same text that says almost nothing.

Why was the turbocharger replaced? You don't just replace a turbocharger unless you're sure it's actually broken. Or are you getting it for free?

Which error disappears by clearing the error memory? At most, only the entry within the error memory itself. And only permanently, if the cause of the error has been eliminated.

A fuse only blows due to a short circuit or overload. The cause of such problems can easily be found with the cheapest multimeter. Can you rule out the rear wiper as the cause of the problem? The motor shaft often corrodes and seizes, which can lead to the fuse blowing. Disconnect it and observe the fuse. Then do the same with the air conditioning compressor. Then, the same thing with the fan for the fresh air.

01237 - Fuel shut-off valve (N109) -> Has this been checked/replaced?

Perhaps you've already done all of that, but it's not clear from your text.

Quote:

Then the same thing with the fan for the fresh air.

This is something different . In the Climatronic system, there is a small plastic grid in the control panel, behind which is a temperature sensor. Air is drawn into the sensor.

Best regards, Rainer.

Quote:

This is something different. In the Climatronic system, there is a small plastic grid in the control panel, behind which is a temperature sensor. Air is being sucked into the sensor.

"I know. But it's likely a brushless DC motor controlled by the Climatronic electronics, similar to a fan in a PC power supply or CPU cooler, only smaller. Its power consumption doesn't increase significantly when it's blocked. Even if it did, it would never blow a 10, 15, or 20A fuse. So, the problem must lie elsewhere." There aren't many large consumers in that area, so the fault should be relatively easy to locate.

Quote:

Blowers for temperature sensors (V42)

...I therefore consider this to be a secondary issue for now. At least not for the cause of the blown fuse.

Regarding the issue, I'm leaning more towards the rear wiper/wiring harness.

Best regards, Rainer.

Rainer K. wrote:

Due to the securing mechanism, I'm also leaning more towards the rear wiper/wiring harness. Best regards, Rainer

Me too . The tree often rubs against the bending points on the rear door hinge, just below the bushings.