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ABS Failure & PSM Off Go to your Workshop indicator lights coming


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I was taking a drive the other day and I was romping on it, going 60 - 90mph, I had to brake hard and suddenly, my 2003 Porsche 911 Carrera 4 Cabriolet started to throw two codes on the dash, "ABS Failure" and "PSM Off Go to your Workshop" and the ‘ABS’ and 'PSM' idiot lights came on.


 


I turned the car off and all of the lights went off. I drove it again and every time I would brake, the lights would come on again and, if I turned the engine off, the lights would go off, again. So, I took the car out and didn’t hit the brakes the entire way home and the lights didn’t come on.


 


I looked up the ABS and PSM Off codes on the Internet and there seem to be all sorts of reasons for these codes.


 


I used my diagnostic tool and there are no additional codes. 


 


Any thoughts before I take my car into the shop?


 


Thank you!


 


Julie


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I was taking a drive the other day and I was romping on it, going 60 - 90mph, I had to brake hard and suddenly, my 2003 Porsche 911 Carrera 4 Cabriolet started to throw two codes on the dash, "ABS Failure" and "PSM Off Go to your Workshop" and the ‘ABS’ and 'PSM' idiot lights came on.

 

I turned the car off and all of the lights went off. I drove it again and every time I would brake, the lights would come on again and, if I turned the engine off, the lights would go off, again. So, I took the car out and didn’t hit the brakes the entire way home and the lights didn’t come on.

 

I looked up the ABS and PSM Off codes on the Internet and there seem to be all sorts of reasons for these codes.

 

I used my diagnostic tool and there are no additional codes. 

 

Any thoughts before I take my car into the shop?

 

Thank you!

 

Julie

 

 

What codes are you seeing?

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I've actually tested in several times and there is nothing coming up. I have an Innova 3100 CanOBDA2. Is this an adequate diagnostic tool for my Porsche? I am going to check it out on the Internet right now to see for myself...

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I've actually tested in several times and there is nothing coming up. I have an Innova 3100 CanOBDA2. Is this an adequate diagnostic tool for my Porsche? I am going to check it out on the Internet right now to see for myself...

If it does not have the option for you to connect to the ABS unit, most likely not adequate.

Edited by Ahsai
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Brake light switch to MAF to ABS....too many possibilities.

You may want to check if there are people with Durametric in your area who may offer help http://www.renntech.org/forums/topic/21656-pst2-piwis-durametric-tool-registry/

 

+1.  It is often very difficult to correctly diagnose these cars without a Porsche specific scan tool (Durametric, PIWIS, PST II).

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Hello All,

I just picked my car up from the shop and following is the shop's resolution for the 'ABS Failure' and 'PSM Off Go to the Workshop' situation on my 2003 Porsche 911 Carrera 4 Cabriolet.

 

"Found fault for ABS pressure switch and stop light switch. Suspect intermittent signal from stop light switch is root cause of the ABS warning light." They replaced the stop light switch. Part No. KM 0.50. Price $21.27. Labor: 1 hour. 

 

After driving the car for several hours, there has been no reoccurrence of the lights coming back on. 

 

Here is a troubleshooting document that has diagrams of the 'stop light switch' for both the ABS 5.3 and ABS 5.3/TC systems: 

http://www.europeantransmissions.com/Bulletin/DTC.Porsh/lib_download.jsp_file=por_brakes_abs5.3diag.pdf 

 

Hope this helps someone else who experiences the same sort of issue.

 

Special thanks to kbrandsma, White987 and ahsai for your help and guidance.

 

I'm back on the road...yahoo!

 

:offtopic: ​Incidentally, my idle is kind of rough and I've done just about everything possible for a tune up and the shop recommended I use Chevron Techron Fuel Ignition Cleaner. They said I should put a pint of this stuff in my fuel tank with a full tank of gas (16 gallons) and take the car out on the open road and open it up to about 6,000 rpms or more and they said it would hopefully clean out my injectors that may have gummed up from idling in traffic (stop and go, etc.)...what do you all think about this?

 

They said I could put a bottle of the stuff in my car every week, if I wanted to. It sounds a bit flaky so I thought I'd ask the experts...you guys/gals.

 

I bought a bottle of the stuff and tried it and I don't know yet if it has actually worked. I'll find out tomorrow when I start driving around again. I don't usually take my car to 6,000 rpms or even 5,000 rpms, it kind of hurt even doing it. And, finding a road to do it was kind of difficult. I stayed in 3rd gear 'cuz I didn't want to speed too much. I don't think it is incredibly wise to speed around recklessly in town or on the interstate, kind of stupid, really. I try to follow the laws most of the time..

 

Maybe that is why I keep blowing things up :drive: 

 

Thank you and I hope you all have a great night!

Julie

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