[Ertech]

Hi guys getting a code for vacuum pump 17837 open circuit
connection looks good , car brakes fine ...
do I need to replace thisnpump or can I leave it like this ,
thanks
Erick

 

[billymade]

17837/P1429 - Ross-Tech Wiki

wiki.ross-tech.com

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[billymade]

Give us the : year, model, engine, trans, info; for testing and service manual links.


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[Ertech]

its a 2004 2l automatic

 

[billymade]

Brake Booster Control Module (J542)

Volkswagen Workshop Manuals > New Beetle L4-2.0L (BEV) (2004) > Brakes and Traction Control > Power Brake Assist > Vacuum Brake Booster > Component Information > Testing and Inspection > ABS/EDL/ASR/ESP ABS Mark 60 Vehicles From M.Y. 10.00

New Beetle L4-2.0L (BEV) (2004) > Volkswagen Workshop Manuals > Brakes and Traction Control > Power Brake Assist > Vacuum Brake Booster > Component Information > Testing and Inspection > ABS/EDL/ASR/ESP ABS Mark 60 Vehicles From M.Y. 10.00

workshop-manuals.com

If you are using vcds; there maybe output teats, you could try.

 

[Ertech]

yes I know , how important is it?the brakes feel great

 

[billymade]

Good question: correct brake operation; is not something to ignore; testing, would be next to find the problem? Brake failure or reduced performance; could put your life on the line, i would fix the problem correctly.


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[Thejarhead]

Good question: correct brake operation; is not something to ignore; testing, would be next to find the problem? Brake failure or reduced performance; could put your life on the line, i would fix the problem correctly.


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Your life and other lives. Those riding with you and those sharing the road with you.

 

[Ertech]

For sure I would not risk . Was just wondering since I read there is a lot to délesté it on the 2,5 and the brakes feel fine .

 

[billymade]

The 2.5L has its own unique mechanical vacuum pump; which is driven by the engine. If you have a 2.0L, the setup; is totally different.


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[billymade]

The ross tech trouble code; mentions the J542 vacuum pump; here is a self study program, that might apply to your unit and explain how it works:

Self-Study Programme 257
Electric vacuum pump for brake servo unit
Design and Function

Self-Study Programme 257 - Google Search

The SSP; states the purpose of the pump and why it is needed:

Cars fitted with a petrol engine in combination with an automatic gearbox which comply with the EU 4 Standard have an electric vacuum pump. This is used for assisting the brake servo unit. In this engine-gearbox combination, the throttle valve is opened particularly wide when the engine is started from cold, as well as when it is idling with a drive position engaged and the brakes applied. This is intended to reduce the pressure drop in intake manifold.


Discussion of trouble code and testing info on a 1.8T automatic Jetta:

HELP! Brake Booster Control Module J542 - What is it?

Hello all I am trying to understand what is this brake booster control module. I have a 2002 Jetta 1.8T tiptronic that has a hard brake pedal. I also get a code 17837. I have tried a number of things. I have another Jetta with the same setup that I have been stealing parts to help fix the...

www.vwvortex.com

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[Ertech]

I was just curious , I would never gamble with safety . Was just curious on how useful it is since it’s broken and I would have never known unless I scanned the car

 

[billymade]

VW put it there for a reason and it is part of the brake system. Download and read the #257 self study program; which explains its function and why it is installed. It sounds like in certain circumstances; the pump, helps with low vacuum, in certain scenarios, which can impact brake performance. The testing procedures; will help you diagnose the problem (fuses, wiring, possible component failure; which requires assembly replacement).

 

[Ertech]

Trying to find that elusive fuse 51 ??
checked under the dash etc..
1-Anyone know where it is on a 04?
2- trying my best to diagnose , no power to the pump ground is good
Anyone have a wiring diagram for that section I really need to find where the power is coming from
Thanks

 

[Ertech]

ok guys found the fuse 51. its under the driver dash way on top well hidden , it was a 15a but I think I should have beed a 20.
the pump was seized and burnt the fuse .

 

[anilkayn]

Give us the : year, model, engine, trans, info; for testing and service manual links.


192.168.100.1 192.168.1.1