18 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHPIWIS connection to ABS Control Unit
Leading reported evidence
Use 40.6
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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Performed · outcome unconfirmed
I use the 40.6 when working on my 970.1 Panamera without issue, but it won�t automatically identify my 996.2 when it�s connected and doesn�t read all the modules correctly either.
Leading evidence: 'Use 40.6' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Recommend piwis 2' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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1
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Performed · outcome unconfirmed · Original poster
I have tried a second used ABS CU but that did not change anything.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
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Performed · outcome unconfirmed
I use PIWIS 3 38.4 to read all modules including ABS on the 996.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
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Suggestion
See if that changes your ability to connect with PIWIS.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
I use the 40.6 when working on my 970.1 Panamera without issue, but it won�t automatically identify my 996.2 when it�s connected and doesn�t read all the modules correctly either.
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
18 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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Generation: 20261027T201111Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I cannot seem to get a connection between PIWIS and the ABS Control Unit. The Car is a 2001 C2. The screen on the PIWIS flickers between seeing the control unit and not seeing it. I have tried a second used ABS CU but that did not change anything. I can connect to all the other CU's. I has been suggested that the K-wire (diagnostic wire) could be an issue and that the K-wire to the stereo could be the problem. But, there is no stereo and I do not have a K-wire in that harness. There does not seem to be any visually apparent connection issues at the ABS plug-in or the OBD plug-in. Fortunately the car has relatively few CU's, specifically DME, ABS, Alarm, Air Bag, AC, Cluster, Seat Memory.
Anybody have some troubleshooting ideas?
There are a few PIWIS 3 clones IMO none of them are really that good yet. Get a P2 clone - much better for a 996. The P3 only works well with newer cars.
Its the VCI none of the clones are perfect Im not surprised certain lines don't work.
What is the exact VCI? There is only one clone that is decent but its 3 x the price of all of them
Okay, I actually have another question. At which generation does the PIWIS 2 stop being useful, and the PIWIS 3 is a better substitute? 991, I�m assuming? And what about the other cars, like the Cayenne and Panamera, etc�
edit: oops, I just realized there�s an edit function.
Thank you for the bits of advice. I am still working on this issue.
I have an excellent power supply.
I have a VXDAS clone and a DoIP VCI.
I have checked the resistance of the Kwire between the ABS CU and the OBD port. It is 10 ohms which seems a bit high. I thought perhaps that was the issue. There is a welding splice between the 2 points. I have been digging into the wiring harness in the location identified by the wiring diagram but I have not been able to find the splice that is a potential point of the problem. Next step is to run a jumper wire between the ABS CU and the OBD port to see if the lower resistance changes the PIWIS response.
I have a clone piwis 2 and it works properly on 996, 997 and 955/957 cayenne. Probably on others which I have not tried yet. I don't have a 991, 992, or 958 to test it on. If someone wants to drop-ship me a 992 GT3 RS I promise I'll try it and report back.
my piwis3 clone connects easily to ABS of 996. with a clone vas6154 (the gray thingy). as it was mentioned, try connecting with high voltage, e.g. engine running. otherwise keep digging on the wiring...
I was thinking about buying this piwis3 and a $100 laptop. Dont know if its any good as i have not done that much research. I think most of this stuff is a roll of the dice.
https://www.autonumen.com/goods-7102...stic-Tool.html
Not sure that it matters, but I also have one of those VXDAS PIWIS3 clone setups, not which VCI, it came as a package deal from them a couple of years ago. My computer has two different OS versions I can run at startup. I use the 40.6 when working on my 970.1 Panamera without issue, but it won�t automatically identify my 996.2 when it�s connected and doesn�t read all the modules correctly either. I have to run 38.2 version to get it to connect and read everything properly on the 996.
