Calling on the PCM Experts...
#1
04-03-2017, 11:27 PM
Join Date: Jan 2014
Location: Palm Desert, CA
Posts: 246
Rep Power: 21 
Calling on the PCM Experts...
First things FIRST. I want to retain the OEM look and maintain my SiriusXM SAT radio features and 2-year subscription.
My 2006 CTT PCM 2.1 has suddenly stopped working. It is somehow stuck in some sort of "boot loop" mode, where it is trying to power-up... but never finishes the task. This is evidenced by the initial, Porsche "welcome screen" for 28 seconds... and then it goes black, without ever making a sound. After this blackout, there appears to be some sort of faint lighting changes on the PCM screen, but never fully opening-up to the radio tuner, by default.
I have tried the keypad hard reset of 1/4/8 multiple times... all to no avail. I have pulled fuses and still nada. The center dash cluster shows no compass, no Radio Off indication, no night illumination of SAT/NAV buttons... absolutely nothing. It's like the PCM unit doesn't even exist.
I have concluded the warranty PCM unit is already bad again. Yes, this Harman-Becker unit has already been replaced by the previous owner's CPO. I have an opportunity to buy a discounted, 2005 CTT PCM(#7L5.035.191L). The only differences are no pesky phone SIM tray and the SAT Radio is activated by pushing a physical SAT button, just above the numeric keypad(photo #1). The dead, 2007 warranty radio (#7L5.035.192C - photo#2) access SAT radio, via the TUNER button and (to me) does not look like a candidate for another, third direct replacement, especially if these 2006-2008 units have a known failure rate.
My final question is - can the 2005 unit still work with the Sirius SAT model in the 2006, without issues? Chime-in, please!
My 2006 CTT PCM 2.1 has suddenly stopped working. It is somehow stuck in some sort of "boot loop" mode, where it is trying to power-up... but never finishes the task. This is evidenced by the initial, Porsche "welcome screen" for 28 seconds... and then it goes black, without ever making a sound. After this blackout, there appears to be some sort of faint lighting changes on the PCM screen, but never fully opening-up to the radio tuner, by default.
I have tried the keypad hard reset of 1/4/8 multiple times... all to no avail. I have pulled fuses and still nada. The center dash cluster shows no compass, no Radio Off indication, no night illumination of SAT/NAV buttons... absolutely nothing. It's like the PCM unit doesn't even exist.
I have concluded the warranty PCM unit is already bad again. Yes, this Harman-Becker unit has already been replaced by the previous owner's CPO. I have an opportunity to buy a discounted, 2005 CTT PCM(#7L5.035.191L). The only differences are no pesky phone SIM tray and the SAT Radio is activated by pushing a physical SAT button, just above the numeric keypad(photo #1). The dead, 2007 warranty radio (#7L5.035.192C - photo#2) access SAT radio, via the TUNER button and (to me) does not look like a candidate for another, third direct replacement, especially if these 2006-2008 units have a known failure rate.
My final question is - can the 2005 unit still work with the Sirius SAT model in the 2006, without issues? Chime-in, please!
Last edited by Zuffenhausen955; 04-04-2017 at 01:59 AM.
#2
04-04-2017, 09:33 PM
I don't know the answer for sure but can tell you my 2055 had Sirius radio. Where I live I got extra lousy reception though so I shut it off after a couple months. Nothing drives me crazier than passing a tree and having the song cut out.
I don't know if the units are interchangeable though.
I don't know if the units are interchangeable though.
#3
04-05-2017, 09:23 AM
Join Date: Jan 2014
Location: Palm Desert, CA
Posts: 246
Rep Power: 21
I was told the older, top unit will require considerable dealer coding, as it will essentially have to be "forward-compatible." I have to purchase the replacement PCM of the same series (2006-2008) and have nearly identical features (Bose, Compass, SAT radio) coded.