After searching a variety of forums, for clear indication of the
best place to tap into an '06 Cayman's signal wire for vehicle speed
(to complete the install of a Pioneer AVIC navigation unit) it appears nearly everybody simply leaves it off... Since I'm spending the time to do this, it's going to be done completely and correctly;
leaving it off simply isn't an option
. I'm looking for a little help from anyone who's been through this already; I hope to find the closest, easiest place to tap the 'VSS' wire...closest to the head unit.
Pioneer's install manual says,
"Car Speed Signal Input - Always connect the vehicle's speed detection circuit. Failure to make this connection will increase errors in the vehicle's location display."
And here's what I found after scanning the Porsche Factory Service Manual (on page 5142)
This indicates Pin 37, a
white/brown wire
, "at right side of front luggage compartment".
If anyone has personal experience, 1.) to confirm this is the correct wire
(?) to use for "Car Speed Signal Input," and....the
best physical location to actually tap the Porsche harness wire
, it would be greatly appreciated.
On a related note, after reading through forums and looking at the FSM, the Reverse Gear Signal Input looks a bit more straight forward...I've found several forum references to a wire under the driver's seat. The FSM appears to confirm that...
Isn't the only reason that this wire is used is when the GPS sensor is blocked by say an underground parking garage? (At least that's what I believe I remembered reading) That's why I didn't bother with it. Try Loi at
[email removed]
I bet he'll know.
My Euromotorspeed instructions say Wht/Brn wire - but it says pin 19 on connector 46 in the front trunk. That's easier than messing with connections under the dash.
Its easy to poke a small hole through a rubber grommet near the battery.
The VSS wire is important for accuracy and extremely helpful for instances when the unit is initializing (looking for at least 3 satellites to get a position lock). This happens every time you start-up the car, since the available satellites change over time. The AVIC uses the VSS and its internal gyro sensor to "dead-reckon" your location based on the last known position. I also found it useful to keep my location correct when in a parking garage. So it knows where I am as I enter the street.
The B/U wire isn't very critical unless you install a backup camera.
