{"id":12450,"date":"2022-04-06T07:39:30","date_gmt":"2022-04-06T07:39:30","guid":{"rendered":"https:\/\/www.cnautotool.com\/blog\/?p=12450"},"modified":"2022-04-10T07:45:12","modified_gmt":"2022-04-10T07:45:12","slug":"how-to-coding-porsche-991-2-by-piwis-iii","status":"publish","type":"post","link":"https:\/\/www.cnautotool.com\/blog\/how-to-coding-porsche-991-2-by-piwis-iii\/","title":{"rendered":"How to Coding Porsche 991.2 by PIWIS III"},"content":{"rendered":"

Car model and year<\/strong>: Porsche 991.2 with PCM4.0 without the Bose amp.<\/p>\n

Symptom:<\/strong><\/p>\n

Deleted my PCM head unit. The downside is that the OEM shelf isn\u2019t tilted enough, under hard acceleration your phones\/keys\/whatever you put in there will fly out\u2026<\/p>\n

\"\"<\/a><\/p>\n

Problem though, is that the bootup sequence of the car has a certain PCM check in it. Without the head unit, once the key is inserted and the lock barrel turned, the following \u201cSystem Fault\u201d message shows up:<\/p>\n

\"\"<\/a><\/p>\n

Porsche 991.2 coding tool to use:<\/strong><\/p>\n

Get access to a PIWIS 3<\/a><\/p>\n

Professional technician suggestion:<\/p>\n

I just took a quick look, here\u2019s how I did it when my radio was out.<\/p>\n

From component overview list, select Gateway -> Maintenance Repairs tab -> Actual\/Specified Configuration menu -> Confirm PCM is displayed with a red minus sign under \u201cactual installation\u201d -> Accept (F8)
\nBack to component overview
\nSelect Instrument Cluster -> Manual Coding -> Next -> Uncheck PCM related options -> Accept -> *Take screen shot of old and new values at confirmation screen*
\nThat should take care of the message in your cluster. You probably will have to clear stored faults too.<\/p>\n

PIWIS may change some unrelated configuration parameters in your cluster, which is why I suspect you\u2019re seeing some weird errors from your dealer\u2019s attempts to fix this. If this happens, you need to put your PIWIS in engineering mode and correct the parameters individually using the screenshot of changed values.<\/p>\n

If you plan on selling your PCM4, you can\u2019t un-pair your VIN from the head unit like in previous versions. If you sell your PCM, the new owner will need to deactivate component protection at a Porsche Dealership (or anywhere with a PPN login and PIWIS III).<\/p>\n

Finally! Solved!<\/p>\n

Update: got it done just like\u2013\u201cAccepted the actual vs. specified config in the Maintenance Repairs tab and instantly dash error was gone, thanks!!<\/p>\n

A couple discoveries along the way:<\/strong>
\n1. PADM error message is unrelated. In Actual Values there\u2019s no current flowing to the left dynamic engine mount. A bit of searching here suggests I\u2019m not the only one with a problematic dynamic mount. One for warranty.<\/p>\n

2. Chalk the oil fill level message to an oversensitive sensor. Following a weekend of aggressive pulls and really running the car (must\u2019ve burned some oil in the process) an \u201celectronic dipstick\u201d check cleared the dash before I even started on PIWIS.<\/p>\n

3. While in PIWIS I was naturally curious and pulled the vehicle analysis log (\u201cVAL\u201d). Interesting bits: one can definitely log overrevs just by hitting the rev limiter! I logged double-digit ignition counts in Range 1 and 2. Doesn\u2019t concern me one bit, my RS ain\u2019t \u201cauction material\u201d in this or the next life. Mechanically, in Carrera Cup the same blocks regularly see 9k+ in downshifts (against an 8.8k redline and 100hr rebuild intervals) ditto 9.4k+ on the GT3R. But those looking to maintain a sterling DME should be aware!<\/p>\n

4. Apparently there are different \u201cauthorization\u201d levels of PIWIS. You heard it right, not all PIWIS are licensed the same. After solving my dash error at home, I showed my process to friends at the sole official dealer in Hong Kong. Really not to throw shade at their failed attempt, but to share with them what I learned. They went \u201cwhoa we don\u2019t get these screens in our system, probably because of the different certificate levels given to us by the factory\u2026\u201d Both of us were floored to say the least, knowing how much the factory charges for their official PIWIS subscriptions!!<\/p>\n","protected":false},"excerpt":{"rendered":"

Car model and year: Porsche 991.2 with PCM4.0 without the Bose amp. Symptom: Deleted my PCM head unit. The downside is that the OEM shelf isn\u2019t tilted enough, under hard acceleration your phones\/keys\/whatever you put in there will fly out\u2026… Continue Reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":12451,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1381,240],"tags":[1193,1190,1260,1188,1189,1259,1192],"_links":{"self":[{"href":"https:\/\/www.cnautotool.com\/blog\/wp-json\/wp\/v2\/posts\/12450"}],"collection":[{"href":"https:\/\/www.cnautotool.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.cnautotool.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.cnautotool.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.cnautotool.com\/blog\/wp-json\/wp\/v2\/comments?post=12450"}],"version-history":[{"count":2,"href":"https:\/\/www.cnautotool.com\/blog\/wp-json\/wp\/v2\/posts\/12450\/revisions"}],"predecessor-version":[{"id":12454,"href":"https:\/\/www.cnautotool.com\/blog\/wp-json\/wp\/v2\/posts\/12450\/revisions\/12454"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.cnautotool.com\/blog\/wp-json\/wp\/v2\/media\/12451"}],"wp:attachment":[{"href":"https:\/\/www.cnautotool.com\/blog\/wp-json\/wp\/v2\/media?parent=12450"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cnautotool.com\/blog\/wp-json\/wp\/v2\/categories?post=12450"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cnautotool.com\/blog\/wp-json\/wp\/v2\/tags?post=12450"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}