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Recently had the PSM and ABS lights come up on the '06 CTTS with the take it to the workshop recommendation.
Expected symptoms were the ABS grabbing when coming to a stop even at low speed and sometimes having a hesitation on release when driving off from standstill.
The unexpected symptom was the behaviour of the transmission:
In drive the car would no longer change up a gear unless we were headed down hill (no load?) but the car would take every opportunity to downshift even if the revs did not warrant it.
Driving in D became impossible as I thought I might cause some damage to the transmission. Driving in manual mode was fine - even quite enjoyable for a change as I have often found the the gear changes to come at very low revs in lower gears.
I owned the '06 CS for 6 years and that used to change gears at 1500 rpm which I thought quite low - the same year CTTS changes at 2000 which is better.
Anyhow, I plugged in the durametric and interrogated the PSM and ABS - No reported faults - nothing also from the instrument cluster - even though I had multiple warning lights in the cluster.
The answer came when I interrogated the Transmission - it reported an code - 1680 - RPM signal for front right wheel.
It appears the sensor in the wheel had failed and this was being used by the transmission to set change points.
Odd that the error message on the cluster reports ABS and PSM while the onboard diagnostics report Transmission.
The Porsche part 95560640610/11 costs £114 + 20% VAT in the UK but as it is the same part on VW and Audi it can be easily bought for around £35 including VAT.
The part is held in by a 6mm Allen head machine screw which, because of its placing and exposure to salt, I had to file the edges to get a spanner/wrench on.
The body of the sensor fits into a hole drilled into the suspension - this I put penetrating oil on every night for a week to no avail.
I had to drill it out and pull out the pieces with tweezers.
New part went in super easy and corrected the faults with ABS/PSM and Transmission within 50 yards of driving.
I really like it when people post detailed post repair information like this. Not much to discuss but I'm sure it'll save someone hundreds of dollars down the road.
Phatz, The manufacturer is Ate and their part number is 24.0711-5401.3 for the left side and 24.0711-5402.3 for the right side.
The same part is listed for the Touareg.
I downloaded the Ate pdf from here: http://www.ate-brakes.com/media/1601...09_deutsch.pdf
I know it says 2009 but it is from their current website - The part actually has a VW stamp moulded into it!
Last edited by Joefus; 04-27-2018 at 02:07 PM.
Reason: Ooops typed folded instead of moulded
I think this is heading to the DIY subforum - copied - not moved. And I'll be removing a few posts that aren't directly related to the subject when it gets over there. Thanks much Joefus (Joe?) for documenting this fix. Good stuff!
I found this years ago when I bought an oscilloscope for this kind of thing. I think it's a pretty good guide for trouble shooting the wheel sensors and ABS. https://www.picoauto.com/library/cas...peed-abs-fault
In this case the rust on the hub had expanded and moved the sensor farther away from the speed ring, so the ECU was seeing less signal (sound familiar). Definitely need to clean all that rust off!
The Durametric is pretty good - but I wish they would do an iPhone or iPad app for it.
I have an old Pc laptop that I keep just for Durametric.
Wifi and updates turned off so it doesn't get viruses or explode when it tries to install updates.
It would be great if someone who has both Durametric and ICARSCAN could do a real world comparison table of their functions.
I do own both - and in the case of the 958 series - the iCarScan is the tool I reach for first. I haven't actually used the Durametric since I got the iCarScan - it seems the coverage is better on the iCarScan for the 958 than the Durametric is. That may be different with the series-1 cars (955/957). As far as doing a comparison table - lot of work to do actually. Some years ago I did a comparison of many diagnostics tools for the BMW-Car Club of America magazine "Roundel" - it took a lot of time to do - and then since I only had my own car to check the devices against - it was specific to a certain model BMW. Having to do a comparison between different tools on different year/models of Porsches sounds good until you go to actually do it. If someone wants to pay me - I'd consider it - otherwise, all I can say is I use my iCarScan rather than my Durametric, but as usual - YMMV.
04-25-2018, 05:15 AM
PSM and ABS lights - unexpected solution
