Recirculating Air Flap Question

[bernardtam]

Dear All,

Is there any way to test the Recirculating Air Flap is working or not ?? Any simple way to test it at all ??? Or to reset it ?? I don’t want to replace it without making sure that it is gone !

The reason is that I notice that there is no kick in into the kompressor recently and I think the flap is always staying in the open position at all time.

Thanks

Bernard

 

[Alex Crow]

Probably not the flap, you really need fault codes etc checking first.

 

[television]

Could this not also be a possible MAF fault

 

[bernardtam]

thanks for both of your suggestion, I'd p0806 error code and that is why I'm thinking that the "EVER OPENING" air flap cause the problem. Malcolm, I replaced a brand new MAF sensor 3 days ago. So, I don't think that is thye problem !

I shall wait for more suggestions !

Thanks All

 

[Alex Crow]

t..................I'd p0806 error code and that is why I'm thinking that the "EVER OPENING" air flap cause the problem...........

If you had mentioned this at the start it would have been helpful!

Anything else we ought to know?

The code you have does not relate to the air flap at all - it is a fault with the supercharger clutch.
This clutch may be open circuit, or possibly there is a fault with the K40 relay that powers it, but forget the airflap.

 

[bernardtam]

Alex,

Checked and K40 Relay already, it's ok and no melted solders or what so ever ( may be gone inside but I don't know how to test whether it really work or not ) ! I solder again on the 3 spots anyway and put it back.

Do you think it is worthwhile to buy a new K40 relay at all to try it out ??

I have no idea about the Supercharger's Clutch that may be having open circuit ! How can I test it or is there anything else at all I can look at ? I noticed that the Tensioner seems to be quite irregular and having some flat section along the belt's contact area, does it have any effect on the circuit at all for the clutch ??

Thanks

Bernard

 

[Alex Crow]

Sorry Bernard, but according to your post you seem way out of your depth!

If you can, check the continuity of the supercharger clutch solenoid, and its power supply and earth.

 

[AdamG]

I've been having trouble with the supercharger on my R170 230Kompressor.

It comes up P0806.

The compressor clutch is controlled by the ecu by earthing it.

I opened up the ecu and sure enough the Topfet (similar to mosfet) had blown. It is a BUK101-50DL which unfortunately is no longer available.

I have tried several alternatives VNP28N04, VNP49N04 but both worked for a while then failed.

What I'm not sure of is whether the alternative chips are failing because they are underrated or the clutch solenoid is not 100% working.

The clutch tests ok about 4ohms (I think) and when activated with a 12 volt source it moves nicely.

So basically I'm not sure if the fault is the clutch (the clutch is very expensive) or the replacement mosfets.

Adam

 

[bernardtam]

Well Smart Alex caught me now ! I know very little about car but I would like to work on my car whenever it is possible. Anything concern about the supercharger will be way off my “ DIY – Grade 1 “ ability.

Anyway, I had a few things changed after my error reading, MAF Sensor, 3 Breather hoses, Oil Separator, Engine Mounts and Trans Mount and may be the error will be gone when I check it again after work today ! LOL !!

Adams, sound like to me that you are a advance DIY member here, best of luck and hope that you can solve the error code soon. I will use your info for my reference as well . Good Luck to US !!!!

 

[Alex Crow]

Well Smart Alex caught me now ! I know very little about car but I would like to work on my car whenever it is possible. Anything concern about the supercharger will be way off my “ DIY – Grade 1 “ ability.

Anyway, I had a few things changed after my error reading, MAF Sensor, 3 Breather hoses, Oil Separator, Engine Mounts and Trans Mount and may be the error will be gone when I check it again after work today ! LOL !!

Adams, sound like to me that you are a advance DIY member here, best of luck and hope that you can solve the error code soon. I will use your info for my reference as well . Good Luck to US !!!!

Nice post, good luck, I wish you well.

 

[bernardtam]

Alex, please hold your laugh when you read this ( although I couldn’t help my self hahahaha !), I bring the car to the shop and have another check, the P0806 is still there !

I just leave the car in the shop and hopefully they can solve the problem by tomorrow !

Alex, if they quote me a unrealistic quote, do you think it is worthwhile for me to buy a new K40 relay and give it a go before letting them to do the job ????

Thanks

Bernard

 

[Alex Crow]

.............Alex, if they quote me a unrealistic quote, do you think it is worthwhile for me to buy a new K40 relay and give it a go before letting them to do the job ????

Thanks

Bernard

Sorry Bernard, impossible for me to know really - the k40 is not cheap.

I always have to say testing testing testing, until we know exactly which part to change!!

 

[bernardtam]

Dear All,

Hi

Good news. I think I solved the power loss problem. It was the replacement of the K40 and apparently, the car gained the power back.

Before I have the P0806 code, I did the following on my car :

All ignition coils and seal and valve Head cover and gasket are replaced.
Put all new spark plugs
Clean the throttle body inside and out
Replace oil separator and the 3 breather hoses connected there
2 New Engine Mounts + one tranny Mount
replaced 2 new tyres in the front of the car

Then P0806 came out and I :

Try to work on the intake air flap actuator because I think that it stay open at all times and therefore not allow the Kompressor to kick in.
Resolder the K40 relay although there were no melted solders at all

Finally goto the shop and request they check the kompressor and the shop confirmed that my Kompressor is gone. Now I know that they are not doing a good job at all and try to sell me a new Kompressor.

Then, I figure it out before I committed myself to a new Supercharger ( Eaton 45 I think ), I better try to replace the K40 Relay as there were so many threads in the forums accused k40 is one of the major killer of the Kompressor and therefore, I brought one and replaced it. Afterward, I try the car and it seems to be gaining all the power back and I’m pretty sure that K40 is the trouble maker in this case.

Mates, don’t just look at the solder joints of the K40, they are perfectly ok in mine but turned out to be the cause of the P0806 code. I think some of the resistors, transistors or whatever inside went bad and may be it is a good idea to replace it ( or if you have friends have the K40, borrow it and try it out in your car ) before you consider a replacement for the Supercharger.

And today, I replace the crank sensor ( no problems for the old one but just replace it as it is 14 years old already ) and the noisy fan clutch as well.

Thansk ALL for the inputs and info !

Well, I am going to have a good wash and wax on the car tomorrow !!!!

Cheers

Bernard

 

[ELGRINGO]

Seems a lot of money spent to rectify fault, codes.

 

[bernardtam]

Seems a lot of money spent to rectify fault, codes.

Yes Elgringo, but I think all of us love our car and as long as I can afford to keep it in a good running condition, I will keep it. The car is now with us 14 years and still running good and strong. We just hit 240,000km on the clock yesterday !!

Bernard