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E39Nutz, can you be a bit more specific, did you disconnect a harness at the nav unit?
at least on My 2005 CTT, there is no place to manually set the date, only the date format. So does something become available when you disconnect the nav, im guessing not? Maybe the 997 has always had the option to set the date, now it just stays correct?
E39Nutz, can you be a bit more specific, did you disconnect a harness at the nav unit?
at least on My 2005 CTT, there is no place to manually set the date, only the date format. So does something become available when you disconnect the nav, im guessing not? Maybe the 997 has always had the option to set the date, now it just stays correct?
You can disconnect the power harness or disconnect the MOST connection to the DVD unit. The PCM has to think that you don’t have navigation. Once nav is disconnected, the date adjustment feature will show up. This is how dumb the design was.
Your era of Cayenne and 997 designed by the Bose system used MOST, fundamentally they have the same design and same logic. If it is easy for you to access the navigation drive. Either disconnect the fiber optic or the power harness will do. Give it a try, you have nothing to lose.
E39Nutz, your the man!!! We owe you.
After pulling fuses, nothing. After asking a Penske Porsche dealer, nothing.
Pull the MOST cable, bam, date can be set.
i moved the passenger seat all the way forward and up, and from the back seat reached under, not the easiest cause there is an hvac duct and then the metal frame holding the dvd unit, and we all know porsche connectors can often require 2 hands. MOST only need 1, got my hand in there after pushing down on the hvac duct, disconnected it.
Started it up, got the normal warnings on the PCM that dvd, amp, etc. are no longer connected, just press the right **** to enter, then go to the main screen, hit set, think I got another error so pushed the right **** to enter again, then select set date and bingo, you can change it now!!! Not just the date format anymore, day month and year are now there.
You where right, how dumb, that you can't override the date unless You trick it, or that the NAV is so stupid in the 1st place with controlling the date past 2019.
Funny how the month was correct, but not the day or year.
Check out my earlier post, no date. Now date!!!
i can't wait to show my dealer, but Im NOT going to tell then how it can be fixed, they don't deserve to know.
This missing date,,yes a small thing, was really bugging me. Everything about my CTT feels great now, ha!
forgot it shows on the audio screen too, down on the bottom right,
Its holding the date even after reconnecting the MOST.
Last edited by Corvetteboy6988; 06-22-2020 at 11:28 PM.
Reason: Typos
Glad to hear that worked for you. This thing bugged me for a few weeks, tried Durametric but was not able to find ways to change date. Learned from others that the date is set by the nav unit. Hence I thought of tricking the system.
On April 6th, 2019 older GPS units may experience a range of problems because of a limitation in how they handle dates. Those problems could include not being able to receive location data. It turns out the way dates are stored in older GPS units has a rollover event every roughly 20 years and we are about to experience the second one since the GPS constellations came online. The rollover last happened in 1999, but in the last 20 years the use and dependence on GPS has increased dramatically.
The Department of Homeland Security has published a bulletin on the upcoming rollover, as has the Coast Guard. Both bulletins make reference to a new GPS spec (IS-GPS-200) that deals with these rollovers gracefully. Unfortunately, the bulletins also warn that not all implementations of the new specification work properly and some GPS units might be prone to trouble either at the 4/6/19 rollover or later.
The underlying problem stems from the way GPS units store dates. The original specification for GPS had dates stored by week in a 10-bit field (2^10 or 2x2x2x2x2x2x2x2x2x2) which is 1,024 weeks. 1,024 weeks is 19 years, 36 weeks. Dates for the GPS constellation start at midnight on January 5th, 1980, so the first rollover occurred on August 21, 1999. Now, 19 years and 36 weeks later the same thing will happen again on April 6th, 2019.
Furuno has stated their units will experience the rollover on March 17th, 2019, almost three weeks earlier than the published date in the notices. Furuno has a list of affected units as well as information on how to cold start the units to restore location information. It appears the date will remain wrong but the location services should function correctly. The affected units appear to all have been introduced in the early 2000s and ended sale around a decade ago.
Raymarine has posted to their forum that they are confident most of their recent hardware (Axiom, a/c/e/eS-Series MFDs and Raystar 130 & 150 GPS receivers) are unaffected.
Garmin has published a support article indicating they don’t expect trouble for their units as long as they are running current software.
Most of my research indicates the trouble is likely to be restricted to some possible restarts or even factory defaulting of equipment followed by potentially incorrect dates. I don’t believe it’s likely much equipment will end up fully broken but do think it’s prudent to check the accuracy of your GPS equipment around the 4/6/2019 date, especially if you have older navigational equipment.
My 2003 has a single CD and so I guess the Nav is integrated into the head unit. My incorrect date doesn't bother me though.
My 2005 is a single CD. Yes you have an older pcm, but i thought the only difference was yours is CD based not DVD based. So you don't have the unit under the passenger seat?
thought you head unit looks just like mine, so how does it have the nav built in? Maybe im way off here. You might still have hope.
My 2005 is a single CD. Yes you have an older pcm, but i thought the only difference was yours is CD based not DVD based. So you don't have the unit under the passenger seat?
thought you head unit looks just like mine, so how does it have the nav built in? Maybe im way off here. You might still have hope.
agree, Nav is most likely a separate unit, regardless of cd or dvd base, the system logic seems to be the same. Nav detected, date adjustment inactivated.
Looks like I have a Navigation Control Module. #4 In the pic.
I just wonder where it is. Probably under the seat.
Rather than fix my date, I just wish I could get an old copy of the single CD I need for my Nav to work. It's US "East."
The one that came with my car had a crack down the middle of it. Seems like it's legal for me to get that info as an iso or whatever since I'm in possession of the original CD.
Anyway just sayin.
06-21-2020, 03:54 PM
