The CWA100 upgraded supercharge coolant pump thread...everything CWA100...

[Sendit_S4]

Another rookie question... Does cutting the signal wire cause any codes or CEL?

[irish07]

Another rookie questions... Does cutting the signal wire cause any codes or CEL?

Code=Yes
CEL=No

I’ve tuned my own car and removed the code, which is P190C.


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[mahhdd]

Another rookie questions... Does cutting the signal wire cause any codes or CEL?

Code=Yes
CEL=No

I’ve tuned my own car and removed the code, which is P190C.


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This. Saw it yesterday... It shows up under the Engine component in VCDS. This is what they call a "Soft Code" because it shows up but doesn't trigger a light on the dash.

[MSq5]

Another rookie question... Does cutting the signal wire cause any codes or CEL?

Yes. See other post above this. I installed a switch for that middle wire. I leave the circuit closed (signal working) except when making Dragy runs or multiple back to back full throttle pulls. Then, I flip the switch to "off" which lets the pump run all the time the engine is running - 100% duty cycle. I'm still on the OEM CWA 50, so I'm not sure running the pump 100% makes much difference.

[tmoe]

Was the CWA50 PWM controlled for your test or was it running all the time? And how about for the CWA100-3? Thank you for sharing your data.

Answering an old question about my test results comparing CWA50 to CWA100-3 both pumps were PWM controlled. I haven't tested 100% vs PWM as I've been happy with IAT's in current config. Would still like to figure out how ti get rid of soft code, a little confusing as PWM works.

[01northernS4]

Yes. See other post above this. I installed a switch for that middle wire. I leave the circuit closed (signal working) except when making Dragy runs or multiple back to back full throttle pulls. Then, I flip the switch to "off" which lets the pump run all the time the engine is running - 100% duty cycle. I'm still on the OEM CWA 50, so I'm not sure running the pump 100% makes much difference.

I've done the exact same thing with the switch and despite reading previous posts here stating Unitronic already runs at 100%, I see a big difference running the pump at 100%... stays cooler longer, able to be within 10 to 15 degrees of ambient...

Strange...

[JoedreddUK]

So after 2 years of fitting the CWA100 to my 2009 B8, I now have the P190C soft code come up for no reason.

Any idea on how I can stop this happening? I used the Tecomotive kit


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[BrokeBichB8]

Pierburg experts please help:

I went to the junkyard and pulled a pump off an early 2010-2011? A6.

The pump has 4F0 965 567 on it. Also, 7.01360.11.0

From research CWA-100 has part # 4H0 965 567 So I am wondering if this may be an early revision??

Can you tell me if this pump is anyway better than the current CWA50 on my s4?

Thank you

[RoofRails]

Pierburg experts please help:

I went to the junkyard and pulled a pump off an early 2010-2011? A6.

The pump has 4F0 965 567 on it. Also, 7.01360.11.0

From research CWA-100 has part # 4H0 965 567 So I am wondering if this may be an early revision??

Can you tell me if this pump is anyway better than the current CWA50 on my s4?

Thank you

Here is a good resource for information on those pumps.

https://www.tecomotive.com/en/products/CWA100.html

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[BrokeBichB8]

Here is a good resource for information on those pumps.

https://www.tecomotive.com/en/products/CWA100.html

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Bro thank you for kindness but I have studied that page till my eyes bled. I am wondering if there is any way A6 pumps were designed with more flow/power for bigger vehicle? I thought possible when I couldnt find the part number. I was just hoping if there was any way to decipher the power of the pump from part #. When I research the part number I cannot find a replacement and I wonder why. Thanks

[RoofRails]

Bro thank you for kindness but I have studied that page till my eyes bled. I am wondering if there is any way A6 pumps were designed with more flow/power for bigger vehicle? I thought possible when I couldnt find the part number. I was just hoping if there was any way to decipher the power of the pump from part #. When I research the part number I cannot find a replacement and I wonder why. Thanks

I see. I believe the answer you are looking for is No... The CWA - 50 pump you grabbed off of a A6 is no different then the one on a S4 as far as flow is concerned.

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[ANMS4]

We bought this for my buddys SQ5 and AITs are horrible way higher than stock, I feel like the pumps not running at all. I though I read here somewhere that the harness may need to repined on some cars? But can’t find it :/

[RoofRails]

We bought this for my buddys SQ5 and AITs are horrible way higher than stock, I feel like the pumps not running at all. I though I read here somewhere that the harness may need to repined on some cars? But can’t find it :/

The pin out is always the same but double check it because someone could have screwed up the harness that came with it. If it's pinned correctly then remove the signal wire and the pump should go into emergency (100%) mode.

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[bajan01]

Here is the harness from the CWA100-3 that I purchased from Tecomotive. The flat end of the large connector that connects to the pump itself is towards the top of all of these pictures. The top (purple, signal) and middle (red, +12V power) wires cross from one end to the other.

[ANMS4]

^^ thanx guys

[sepheroth86]

Question: how does one test the pump using VCDS? I have a feeling that my original CWA50 is not functioning correctly. Shouldn't it make some noise?

[bajan01]

Question: how does one test the pump using VCDS? I have a feeling that my original CWA50 is not functioning correctly. Shouldn't it make some noise?

Not sure about VCDS other than looking for sky high IATs on a datalog. It should but it might not be loud enough for old ears. You should be able to at least feel a vibration when you touch it and lock/unlock the car or open a door.

[djn876]

Question: how does one test the pump using VCDS? I have a feeling that my original CWA50 is not functioning correctly. Shouldn't it make some noise?

Under engine, output tests, there is one for the charge cooler pump. It will basically just run the pump at a few different speeds and you can hear it respond and watch the PWM signal change at the same time if you monitor as well.

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[englishbay]

I ordered a pump from mercracing it is DOA. Anyone else have problems with the pump not getting a signal? The Audi cable that mercracing provides was test to be ok, the pump just wouldn't run. Sent a request for an RMA from mercracing but haven't heard back yet.

[djn876]

I ordered a pump from mercracing it is DOA. Anyone else have problems with the pump not getting a signal? The Audi cable that mercracing provides was test to be ok, the pump just wouldn't run. Sent a request for an RMA from mercracing but haven't heard back yet.

Did you try running it without the signal wire? And verify the wiring was pinned correctly?

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[RoofRails]

I ordered a pump from mercracing it is DOA. Anyone else have problems with the pump not getting a signal? The Audi cable that mercracing provides was test to be ok, the pump just wouldn't run. Sent a request for an RMA from mercracing but haven't heard back yet.

Make 100% certain the pin out on the connectors are correct. Scroll back into this thread for pictures of what they should be. When I recieved mine the positive and ground wires were incorrectly pinned and the pump wouldn't run. Once we swapped them out it was golden. After that definitely de-pin the signal wire. Some vehicles work with the signal wire hooked up and some don't. It's worth a try before sending it back.

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[englishbay]

Did you try running it without the signal wire? And verify the wiring was pinned correctly?

Make 100% certain the pin out on the connectors are correct. Scroll back into this thread for pictures of what they should be. When I recieved mine the positive and ground wires were incorrectly pinned and the pump wouldn't run. Once we swapped them out it was golden. After that definitely de-pin the signal wire. Some vehicles work with the signal wire hooked up and some don't. It's worth a try before sending it back.

Thanks I will try that, the mechanic did check the harness, but we will double check running without the signal wire

[BrokeBichB8]

Just bought the proper plug off amazon and repinned the ends of the wires for my CWA 100. Below is a picture of my stock CWA50 plug with wires shown. I kinda had a hard time making sure the pinout was correct prior to cutting. But from documents, middle wire (blue/yellow) is signal and was left disconnected Brown I assumed to be ground per usual. Yellow/Red was hot 12v. I am doing PCV, water pump, thermostat at this time so gonna be changing coolant ratio as well and hoping for SOME ICY IATS lol

[Fresh.S4]

im running 98% water and a splash of water wetter for color. on the freeway cruising i can get it down to 17* above ambient. still using the cwa50 @100% duty

[englishbay]

Thanks I will try that, the mechanic did check the harness, but we will double check running without the signal wire

The mechanic got the pump working by cutting the signal wire. So glad that I don't have to return it. Now I have a fault code tho for the signal wire. Anyone been able to use VDS or some other tool to get rid of the fault? Luckily its not a check engine light.

[AudiC7Owners]

The mechanic got the pump working by cutting the signal wire. So glad that I don't have to return it. Now I have a fault code tho for the signal wire. Anyone been able to use VDS or some other tool to get rid of the fault? Luckily its not a check engine light.

It's a soft code that will always be there, but won't trigger a cel

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[englishbay]

It's a soft code that will always be there, but won't trigger a cel

Great thanks

[djn876]

Yup, code ain't going anywhere. If it makes you feel better, mine will run and vary speed based on the PWM signal, but I still get the soft code.

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[Creepynoodle]

Hey guys, ended up snagging a used cwa100-2 for a great price.
Where can i get a plug&play harness from in the US? Hoping they're in stock. Thanks!

[low612]

So the cwa100-2 is 4 pin to the audio 3 pin. So one of the ground pins on the pump isn't used or do we double the ground coming from the Audi harness?

[BrokeBichB8]

So the cwa100-2 is 4 pin to the audio 3 pin. So one of the ground pins on the pump isn't used or do we double the ground coming from the Audi harness?

I read that one of the pins is like a return communication line?? someone might be able to explain it better, but guys on the mustang forum just run it wide open two wire.

[low612]

Yeah , I'm guessing just use ground ,pwm,and 12v power from cat and going to pump. Which would eliminate using the signal pin on pump.

[stapan]

Hey guys very interesting thread!

Quick question... I am buying a CWA150 with connector kit to install on my dual pulley 2016 Q5 3.0T w/merc quad pass hx.

I am confused about what is needed to make this work. Can I install it essentially plug and play where the original pump is after verifying the pins (and possibly cutting the signal wire if it doesn't work on my vehicle)? As a single pump I shouldn't need any additional brackets or hose connections? Also I am reading that the current draw is 15a and the original wiring is fused for 15a so I am wondering if I can get away without a relay if I use the OEM PWM signal. Is there some other method to reduce the duty cycle or current draw slightly just in case?

[michael.kaemmer]

Beware of pressure rates from CWA150!
High pressure no more volume!

Different connector. ECU will most probably not control pump via PWM correctly as 150 needs signal to slower speed or to start. So not sure. Try using without PWM signal so pump will run in emergency mode.


DS1 stage 2 on direct waste gate control plus TCU tune, Inter Cooler Spacer 1", upgraded throttle body 49mm bores, SRM short inlet pipe plus RS airbox, Sport RS exhaust, Race sparks and RS break rotors

[michael.kaemmer]

Hey guys very interesting thread!

Quick question... I am buying a CWA150 with connector kit to install on my dual pulley 2016 Q5 3.0T w/merc quad pass hx.

I am confused about what is needed to make this work. Can I install it essentially plug and play where the original pump is after verifying the pins (and possibly cutting the signal wire if it doesn't work on my vehicle)? As a single pump I shouldn't need any additional brackets or hose connections? Also I am reading that the current draw is 15a and the original wiring is fused for 15a so I am wondering if I can get away without a relay if I use the OEM PWM signal. Is there some other method to reduce the duty cycle or current draw slightly just in case?

Look at Tecomotive.de to find control unit to run this pump with lower amps.


DS1 stage 2 on direct waste gate control plus TCU tune, Inter Cooler Spacer 1", upgraded throttle body 49mm bores, SRM short inlet pipe plus RS airbox, Sport RS exhaust, Race sparks and RS break rotors

[stapan]

Beware of pressure rates from CWA150!
High pressure no more volume!

I thought its ok with Merc Quad Pass? Am I making a mistake by trying to use it? Please help me understand as I am a newbie when it comes to this subject.

[Albertaholdings]

I thought its ok with Merc Quad Pass? Am I making a mistake by trying to use it? Please help me understand as I am a newbie when it comes to this subject.

Just run it without the PWM and be happy.

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[acid88]

Just bought the proper plug off amazon and repinned the ends of the wires for my CWA 100. Below is a picture of my stock CWA50 plug with wires shown. I kinda had a hard time making sure the pinout was correct prior to cutting. But from documents, middle wire (blue/yellow) is signal and was left disconnected Brown I assumed to be ground per usual. Yellow/Red was hot 12v. I am doing PCV, water pump, thermostat at this time so gonna be changing coolant ratio as well and hoping for SOME ICY IATS lol

Am I getting it right that you've just repinned the original plug? Does it fit the connector on the cwa100-3 ?

[irish07]

Am I getting it right that you've just repinned the original plug? Does it fit the connector on the cwa100-3 ?

No, cwa50 pins/connector are getting cut off. New leads get soldered or crimped and then inserted into the cwa100 connector.


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[Slvrbul8]

Is this the plug and play kit or is there still possible wire cutting that needs to happen?

https://tecomotive.com/store/en/bund...-3-adapter-kit