Note to Porsche classic - 997 PCCM plus request
#1666
Nordschleife Master
I tested it, seemed to work for me, either that or a got things really mixed up pinwise.
But how would that make sense to have a switched ground?? Serves no real purpose splicing the reverse is already switched and fused..
adding a switched ground does not really add value to that ???
But how would that make sense to have a switched ground?? Serves no real purpose splicing the reverse is already switched and fused..
adding a switched ground does not really add value to that ???
edit - pin8 GND , is the standard spot on the 6 pin video harness for all android radios - as per the photos of the android harness from a month back.
Last edited by myw; 03-17-2023 at 01:48 PM.
#1667
I tested it, seemed to work for me, either that or a got things really mixed up pinwise.
But how would that make sense to have a switched ground?? Serves no real purpose splicing the reverse is already switched and fused..
adding a switched ground does not really add value to that ???
But how would that make sense to have a switched ground?? Serves no real purpose splicing the reverse is already switched and fused..
adding a switched ground does not really add value to that ???
Last edited by nikandriko; 03-17-2023 at 12:20 PM.
The following 3 users liked this post by nikandriko:
#1668
Thank you for posting this - I was waiting for a 3rd person to confirm, and this is exactly why i didn't want to release the rear cam harness yet.
Yes, either you or @svandamme is correct - his testing he had confirmed that pin8 was switched power when pin6 reverse trigger was activated, but from @maxw on his unit - he confirmed that it wasnt the case (not power). As nobody else had chimed in to confirm - and now you are also saying its not power but instead ground.
I was waiting for another person to respond - as having studied it further GND is possible for switched pin8 - as the cayenne reverse camera system uses a GND connection as a control cable that is connected to a relay - its more complicated as the cayenne uses this pin8 GND connection to control the reverse camera motor (as well as the camera power).
Do you have a video of this you can send me?
If what you are saying is true (which I am pretty sure it is) - then the camPower will need to be thru the reverse light wire - as pin8 is a GND (max 200ma) and not power (200ma).
Yes, either you or @svandamme is correct - his testing he had confirmed that pin8 was switched power when pin6 reverse trigger was activated, but from @maxw on his unit - he confirmed that it wasnt the case (not power). As nobody else had chimed in to confirm - and now you are also saying its not power but instead ground.
I was waiting for another person to respond - as having studied it further GND is possible for switched pin8 - as the cayenne reverse camera system uses a GND connection as a control cable that is connected to a relay - its more complicated as the cayenne uses this pin8 GND connection to control the reverse camera motor (as well as the camera power).
Do you have a video of this you can send me?
If what you are saying is true (which I am pretty sure it is) - then the camPower will need to be thru the reverse light wire - as pin8 is a GND (max 200ma) and not power (200ma).
Farley has suggested to me the following options:
- Leave the camera powered from the reverse light. Drawback is I get the 0.5sec “missing camera” screen when getting out of reverse.
- We provide accessory power to the camera which means that it remains on while the key is on. We can provide accessory from the fuse box, from the back of PCCM or even the tail lights. Drawback is the camera stays always ON while the car key is ON.
- We provide accessory power while use pin8 for a triggered ground so that we get the 0.5sec delay and the camera is not always ON. Farley told me that lots of car accessories work with triggered ground vs. triggered 12V.
Would love to hear what you guys think is best.
Last edited by nikandriko; 03-16-2023 at 01:29 PM.
#1670
Instructor
With respect to those who are trying to accommodate an aftermarket amp (non-bose car) I'm wondering if the pin out from an older PCCM unit is the same for the PCCM+ unit:
If they are the same then I could bypass these wires into RCA females to accommodate the line in to the amp. It's frustrating that on aliexpress you can buy the same radio, except for sd card nav , with dedicated RCA amp outs and this unit does not have that option. I suppose porsche felt this is an option for porsches that have not had their audio systems violated .. ?
If they are the same then I could bypass these wires into RCA females to accommodate the line in to the amp. It's frustrating that on aliexpress you can buy the same radio, except for sd card nav , with dedicated RCA amp outs and this unit does not have that option. I suppose porsche felt this is an option for porsches that have not had their audio systems violated .. ?
#1671
With respect to those who are trying to accommodate an aftermarket amp (non-bose car) I'm wondering if the pin out from an older PCCM unit is the same for the PCCM+ unit:
If they are the same then I could bypass these wires into RCA females to accommodate the line in to the amp. It's frustrating that on aliexpress you can buy the same radio, except for sd card nav , with dedicated RCA amp outs and this unit does not have that option. I suppose porsche felt this is an option for porsches that have not had their audio systems violated .. ?
If they are the same then I could bypass these wires into RCA females to accommodate the line in to the amp. It's frustrating that on aliexpress you can buy the same radio, except for sd card nav , with dedicated RCA amp outs and this unit does not have that option. I suppose porsche felt this is an option for porsches that have not had their audio systems violated .. ?
#1672
My bad, it was not 0.5sec. The triggered ground on pin8 remained there actually for several seconds after 12V on pin6 was removed.
Last edited by nikandriko; 03-16-2023 at 06:56 PM.
#1673
Wonder if a combination of my #3 option with @maxw’s #4 would be to use a normal relay with the ground trigger from pin8 (which I suspect that is what the complicated Cayenne camera does and needs a lot of power for that whole mechanism).
This is a relay I found on Amazon https://a.co/d/5h607WM and its configuration with a ground trigger below.
Also, does anybody know any good source for constant 12V (accessory) power in proximity to the passenger rear light?
This is a relay I found on Amazon https://a.co/d/5h607WM and its configuration with a ground trigger below.
Also, does anybody know any good source for constant 12V (accessory) power in proximity to the passenger rear light?
Last edited by nikandriko; 03-16-2023 at 07:26 PM.
#1674
Nordschleife Master
100% the same for decades.
With respect to those who are trying to accommodate an aftermarket amp (non-bose car) I'm wondering if the pin out from an older PCCM unit is the same for the PCCM+ unit:
If they are the same then I could bypass these wires into RCA females to accommodate the line in to the amp. It's frustrating that on aliexpress you can buy the same radio, except for sd card nav , with dedicated RCA amp outs and this unit does not have that option. I suppose porsche felt this is an option for porsches that have not had their audio systems violated .. ?
If they are the same then I could bypass these wires into RCA females to accommodate the line in to the amp. It's frustrating that on aliexpress you can buy the same radio, except for sd card nav , with dedicated RCA amp outs and this unit does not have that option. I suppose porsche felt this is an option for porsches that have not had their audio systems violated .. ?
#1676
Nordschleife Master
and then pin8 (camera -12v max 200ma) be connected as camGND (switched ground)
then this would be easy + simple. the camera would only turn on (have its ground circuit closed) when it the car is in reverse only.
Perhaps an electronic expert can Chime in
#1679
Could also place a relay behind the pccm and only run the 12V device power through the existing cable. Effectively, this will convert the triggered ground to triggered 12V.
#1680
Pin 8 - indeed is switched ground and where you should connect the ground for the camera. For powering the camera, I connected to switched 12v from the fuse box. The PCCM+ clearly has an internal 10 second delay power off on this switched ground, so no error message with the camera when shifting out of reverse (keeps power going for 10 seconds).
Pin 5 - was not able to power the camera off of this. When the PCCM+ is turned on but ignition off on the car, it registers 3.3v. As soon as you turn on the ignition it immediately goes to 0v. I tested putting in reverse as well (triggering pin 6) and it stayed at 0v. As soon as ignition is turned off, it goes back to 3.3v and stays there until PCCM+ is turned off and a period of time goes by for the car to go to sleep (after dash lights off showing mileage, etc.). Not sure what the purpose of this is - but is what I measured testing it.
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myw (03-17-2023)