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PSM ABS Lights On Won't Reset and Code 4440

 
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Old 03-21-2019, 06:35 PM
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PSM ABS Lights On Won't Reset and Code 4440

Recently had a battery go dead and the dreaded PSM and ABS lights came on. I've replaced the battery with a new one. The PSM and ABS lights will not reset. I've run the Durametric scanner on the car and I'm getting the 4440 (steering sensor) code on the ABS 5.7 module. I've tried to re-calibrate the steering sensor with the Durametric but can't get it done. I've done the "turn ignition key on and off twice, turn wheel 20 degrees and then back to center, and then drive method and no luck. I've pulled the brake light switch out, cleaned and tested it, reinstalled it and still no luck. Brake lights work but PSM and ABS lights are on and code 4440 will not clear. There is a troubleshoot protocol that Owen (Durametric) sent to me today that requires me to run some tests at the PSM control module but I'm not familiar with the location of that component or the item that contains the "pins" that I need to read across. Can someone help me with a diagram of those items (PSM controller)? I've attached the trouble shooting protocol with this post hoping someone has done it and can help me and/or that someone else might be able to use it.


It is noteworthy that a user on this site (up-n-over) had exactly the same issue (codes and lights) with a 2001 Turbo and he resolved it by replacing his MAF.


1999 Porsche C4

+80K miles

6 speed trans

No engine or chassis modifications
 
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File Type: pdf
4440_psm53_57.pdf (61.4 KB, 4 views)
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Old 04-04-2019, 02:34 PM
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You need the pinout diagram of the steering angle sensor and/or the PSM pinout diagram as well otherwise you have no idea which wire is pin 3 or 4 or etc. The process is very simple with a digital multimeter once you know which pins you are testing. I don't have those diagrams on hand but maybe someone else can chime in with them?
 
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Old 04-04-2019, 03:00 PM
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Thanks for the info. You are right on point. Once I can get the diagrams, the rest is easy. Just need to know which pins to check between.

A little update: My inde shop has a PWIS (he pays Porsche for the up-connect charges) and he can see the steering sensor respond when the steering wheel is turned but even he can't get the codes to reset, even with his PWIS. Lights come right back on even after the "secret" reset code is entered and the sensor re-calibrated. He thinks it may be a "loss of communication" problem.
 
 
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