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FIXED as of 3/26/24! The culprit turned out to be sloppy welding. When the G805 port on the liquid line leaked at the base, I removed the liquid line and paid a local welder to "fix it". He reattached the port but also mistakenly filled the orifice with weld so no pressure was available at the...

Thank you for your assistance Uwe. After I had my wiring diagrams from Mitchell printed, I lifted the VW to inspect the connector and probe the wires. It appears some "mechanic" broke the locking tab on the connector and it was half off. I simply pushed it on, used aviation safety wire to keep...

Hi. VCDS reports Oil Sensor P0196 & P0198. (Pls ignore the AC codes, 15048 - Coolant Fan Control Circuit 1. The coolant fan is controlled by a signal generator and a manual toggle switch. Also, please ignore 590082 - Control Circuit for A/C Compressor. That's operated by 12v toggle switch)...

I tested the pump using the VCDS Engine Controller, Output Tests, "IDE07243-Heater support pump" and the pump came on. I tried it again, and it would not come on. I cycled the car and VCDS and then it worked for a few seconds, off, few seconds on, off. My guess is the pump has an intermittent...

At 3am on a 45F degree nite, the computer in my 2015 gas model S flashed a warning "RISK" message that extinguished before I put my reading glasses on. Questions (haven't jacked up the car yet): Is there only one heater control pump in a 2015 VW 1.8 gas, model S? Does this pump warm the...

Thx for the ideas. Sorry for my tardy reply. The 2015 Golf model S includes manual AC known as the J301 module. If I were to guess, the ECM won't allow me to "run in" the compressor because the BAR is too low. However, I can manually activate the compressor via VCDS and it works. Questions: Does...

Thx again. I am open to suggestion how we approach this.

Thx. You have been very patient and helpful. I tried that last nite and the light never stopped blinking. I also got a B109E code so this morning I reinstalled the original J301 and followed the procedure again. I set the DURATION to 120s even tho it was 120. Set the flap limits, success...

It's 5 hours later. The AC lite is still blinking when KOER. No compressor, nor fan. Next idea?

Sad to say, I made it worse. Given that 120 duration didn't change anything, I extended the procedure to 240s. "Adapt flap end stops first." It was successful. Select "Compressor Run In; Automatic Start" from the drop-down list. [Go!] It worked. But now compressor does not run, no fan...

Thank you. U said: "Adapt flap end stops first." It was successful. Next step: "IDE02259-Compressor break-in: automatic start" That produced an error: "ERROR CONDITIONS NOT CORRECT OR REQUEST SEQUENCE ERROR" So I went into BASIC SETTINGS and found "IDE03176-Duration of compressor run in". The...

Got it. I didn't replace the compressor so please discuss which adaptation is required for J301.

No, I simply replaced the long code. No fault codes found. G805 located on right front fender, passenger side (my Golf is left hand drive, US). The replacement J301 has a different Workshop code, Importer and Equipt. Under HVAC Basic Settings, I find RESETTING OF ALL ADAPTATION VALUES and...

Ok, I am officially stumped. I replaced the J301 HVAC module, input the codes from the old J301, but there was no change to BAR and the fan never went on. In retrospect, I evac and filled the system with 500 grams, eliminated the wiring to the G805, tried 4 different G805 sensors including one...

Thx folks. I conducted those tests earlier but I sincerely appreciate the ideas and the feedback. Please, challenge my ideas. I grafted an external wire to replace the violet/blue signal wire that runs thru the harness to the J301 HVAC module, T20d connector, pin 16. The result was the same...

Very good idea! I can eliminate the impact the alt has on the circuit by connecting a bat charger while KO E Off. Meanwhile, I found a J301 on Ebay for $30 US. Worth a try. B here next week. I also ordered a blank connector that fits the G805. It's conceivable it's receiving 12- and 12+ but one...

Thx for the reply. I'm 99% certain that pin 16 is correct. When I sliced into it at the G805 violet/blue wire and the J301 HVAC module connector, continuity ended. When I completed the external splice/bypass between G805 and J301 pin 16 to test the harness, continuity reestablished. The main...

Thx for the reply. Question which may help John and me. Is the module replacement procedure for this fellow's door as simple as writing down (before removal) the original long code, workshop code, importer, equipt and inserting them into the new module? That assumes the replacement is identical...

Yes, the front was wrecked twice & I have absolutely no confidence in the body shop who fixed this car so looking for dumb mistakes makes perfect sense. I apologize but I do not know what a "dirty overlay" is. Today’s assignment was to repeat the electrical tests on the G805 presently...

UWE, Question from VCDS newbee: Does he need the VCID from the old door module? Wiki defines: "A virtual circuit identifier (VCID) is a type of numeric identifier used to distinguish between different virtual circuits in a connection-oriented circuit-switched telecommunication network. It...