makymak

Back from the past. I've made some research and found that the diagram for the (K) shows that the command to operate the fans is given by a two stage, 3-pin thermoswitch which is located on the radiator. My car has a 2-pin thermoswitch which I suspect is a thermistor that feeds the actual temperature continously rather than on-off. Unfortunately, I can't find a diagram of the (L) version, to see if that module is designed to work with a 2-pin thermistor or a 3-pin dual thermoswitch. If the above is true, then someone has replaced the oem (L) version with the (K) in the past. Where I live is very difficult to find an (L) version, where the (K) are very easy. I have to buy an aftermarket (L) which is hit or miss. I'm still running with the (K) and only the low speed of the fan available and to say the truth, never had an overheating problem even at 40 degrees Celsius with the ac on. But under curiosity, I will order an aftermarket (L) to see how it works. Ps: both (K) and (L) have the same pinout description on their case. It looks like they are identical. I will search it more but no harsh since I don't have plenty of time and the car runs properly.

The connection is dry. Unfortunately, I can't see the body or the sealing except a very small part of it. The secondary air pump and a lot of cables and hoses are hiding the area. That's why I asked about a diagram. To see what I have to face before I decide to remove parts!

Thank you, Pete! It's a single wire sensor.

According to this video, it's straight forward to replace the cooler. But, I have to find out if there is any more gaskets above the cooler, between it's base and the engine block. There is a sensor above the cooler, too (oil pressure sensor?) that is also a suspect of leaking. Thankfully, all the leakage is outwards, so no oil in cooling system neither water in oil.

Sorry! It's a 2001 Elegance. Non of the above diagrams show the oil cooler.

Hello once again! My lovely, aging Octy is sick again. It has an oil leak. After some investigation, it looks like it comes from the oil cooler. More specific, from the upper side of it, where it is joint with the engine block. I hope it's a sealing failure and not the cooler itself. That's why I need a parts schematic. Of course, any inputs will be helpful and welcomed! Octavia 1.6l SR - AVU

No, not really. Never had any symptoms to make me think of a worn out engine. No oil burning, no blue smoke, engine pulls like crazy. On a second thought, it wouldn't be a bad idea to schedule for a compression test since it's a high mileage car. But all the catalyst problems started after the oem catalytic converter was stolen. Never had any problem with exhaust gas and CEL before the theft.

Well, after a year and the problem returned. I mot'ed it and the HC were again very high. The shop that replaced the catalytic converter replaced it again (for the third time) in good willing and again the HC went back to normal. After two months, the vcds showed the error again. Till now, it shows as intermittent (no cel). I haven't measured the HCs, yet to see if they are above the limits. I'm at dead end. Is it possible that three catalysts are faulty? The shop is quite famous at my area. What else should I check?

Sorry for the late reply. Life runs like crazy! That's very good news! So, we both have the wrong module. My car has also (K) while according to vin number it should have the (L) version. My car with the oem/genuine (K) version: - when the engine worms, the fans run at low speed. - when the a/c is on, the fans run constantly at low speed. - can't run high speed, due to the fault/no need to because the car never overheated. With an aftermarket (K) version: - when the engine worms, the fans run at low speed. - the a/c can't engage at all. I suspect that this module is programed to run the fans at high speed when the a/c is on. Due to the error it can't run the high speed so the module doesn't allow the a/c compressor to engage. Both modules throw the same error code. I will have to try the (L) version, too.

@kareems My Octavia has also the AVU engine and the control module with the (K). It's a climatronic version, though. @Breezy_Pete Thank you for your time! You have pm!

@kareems Can you please tell as the engine type of your car? Does it have climatronic or just a/c?

My findings are the same as @kareems No short to ground, no discontinue from ecu to fan control module. If I disconnect the fan plug from the module, the ecu throws an error that the fan control 1 and 2 are either open or short to + No short to ground error. I suspect the error is at the fan(s). I need further investigation.

No cruise control indicator on mk1. Sorry.

Obviously, I'm kidding! I will remove the scuttle panel as long as I find some free time, definitely not earlier than next week. @kareemsyour findings are welcomed!!!

Thank you, again, Pete! I measured pin 7 on the module plug and no short-circuit found. I quit!!!