chily2008

Does anybody know where I can find out what each plug on the back of my PCM 2 is for? Is there a diagram of the wiring for them somewhere?

Thanks

laxman1100

Bump, I'm looking for the same thing. I'd like to know what wires I can tap for constant 12+ and the best ground. I'm installing a MoBridge/Dension unit.

Loren

PCM 2

Plug A
1 - Speed signal
2 - Free
3 - Free
4 - Terminal 30
5 - Terminal 30 for windscreen antenna
6 - Free
7 - Free
8 - Terminal 31

Plug B
1 - Loudspeaker, rear right +
2 - Loudspeaker, rear right -
3 - Loudspeaker, front right +
4 - Loudspeaker, front right -
5 - Loudspeaker, front left +
6 - Loudspeaker, front left -
7 - Loudspeaker, rear left +
8 - Loudspeaker, rear left-
Note: Plug B is assigned only if no amplifier is installed.

Plug C
1 - Lineout, rear left
2 - Line out, rear right
3 - AF ground
4 - Line out, front left
5 - Line out, front right
6 - Terminal 30 for amplifier
7 - Control lead for CD changer
8 - Terminal 30 for CD changer
9 - Free
10 - Data lead
11 - Clock lead
12 - Reset lead
13 - Free
14 - Free
15 - Free
16 - Free
17 - Free
18 - CD AF ground
19 - CD AF, left
20 - CD AF, right
Note: Plug C consists of 3 parts.
Pins 1 to 6: yellow housing.
Pins 7 to 2: green housing.
Pins 13 to 20 : blue housing.

Pins 1 to 6 are the loudspeaker outputs to the amplifier. They are assigned only if an amplifier is installed.
Pins 7 to 12 are the control leads for the CD changer.
Pins 18 to 20 are the loudspeaker outputs of the CD changer.
Pins 7 to 20 are assigned only if a CD changer is installed.

D - Antenna lead
E - Fuse

Plug I
1 - Video signal, red
2 - Video signal, green
3 - Free
4 - Free
5 - Free
6 - Terminal 31
7 - Free
8 - Free
9 - Free
10 - Terminal 30 for navigation
11 - Terminal 58 d
12 - Free
13 - Terminal 30
14 - Video signal, blue
15 - Video signal synchronization
16 - Video signal ground
17 - Free
18 - Free
19 - Terminal 31
20 - To combination plug III pin 6
21 - From combination plug III pin 11
22 - Free
23 - Fuel consumption signal
24 - Speed signal
25 - Free
26 - Terminal 30

Plug II
1 - Diagnosis lead
2 - Terminal 15
3 - Terminal 86 s
4 - Data lead to navigation unit
5 - Free
6 - DSP (amplifier) ground
7 - Handsfree microphone ground
8 - Handset microphone
9 - Handset speaker
10 - Terminal 30, handset
11 - Free
12 - Voice output ground
13 - Voice output
14 - DSP (amplifier)
15 - Data lead from the heater / A/C unit
16 - Free
17 - Data lead from the navigation unit
18 - Free
19 - Free
20 - Handsfree microphone
21 - Handset ground
22 - Handset on-hook contact
23 - Free
24 - Free
25 - Free
26 - Free

Barn996

As predicted, Loren comes through again.

aliguori

I currently have a 2003 911 with the factory Becker CDR23 stereo with Bose premium sound. Is it a direct plug and play to upgrade to the OEM PCM 2 navigation unit? Is it pre-wired already for everything?

TomF

Hi all,

Reviving an old thread here. Loren, or anyone else, can you point me a wiring diagram for a PCM 2.1? I am looking for the handsfree mic leads...

Thanks!

Cheers,
TomF

thinklabinc

Hi Loren, this is very helpful, I'm planning to install the tranzit blu hf this weekend and was going to attempt to patch into my 997.1 existing microphone (I have the PCM phone option) instead of hanging the microphone the kit comes with.

Would anyone happen to know if the wire diagram that was posted is also applicable to PCM 2.1 which I figure is what is on the 997.1's? Thanks in advance.

Sean