View Full Version : Head Unit Wiring & Pinouts
flyboy
17-04-2011, 11:15 PM
Hi there.
Sorry, might be a slightly long post trying to explain my predicament.
I have the single CD player installed in my 380, and hence the USA Ipod adaptor can't be used as the base head unit does not have the 13 pin input.
The unit has an antenna input, and two connector blocks - 1x 14 pin and 1x 10pin. I believe the 6 stacker head unit also has these same inputs (and the 13 pin one additionally). I've assumed the pin assignment is the same on the base/6 stacker unit, which I'm fairly confident it is.
I have some pins which aren't used, and I'm contemplating whether they can be used for an auxillary input (such as this cable http://www.logjamelectronics.com/piemitspod.html)
The problem with that is trying to find info on the exact pinouts of those two connectors is not easy.
Through use of the workshop manual, I've got most of it sussed:
14 pin Connector
1 - Speaker output
2 - Speaker output
3 - Antenna gain power (provides power to the antenna amplifier)
4 - Park lights sense (turns on backlighting)
5 - Speaker output
6 - Speaker output
7 - Speaker output
8 - Speaker output
9 - Don't know - maybe phone mute
10 - Ignition sense (turns on unit when key is turned to ACC)
11 - Battery (permanent power, allows memory to be retained)
12 - Light dimming rheostat (from instrument cluster, dims backlighting)
13 - Speaker output
14 - Speaker output
10 Pin Connector (For some reason numbered 21-30 in the service manual)
21 - Multicentre display unit (not fitted on my 380, but the wire is there, maybe just part of the bluetooth harness)
22 - Multicentre display unit (not fitted on my 380, but the wire is there, maybe just part of the bluetooth harness)
23 - *FREE*
24 - Don't know - has yellow wire, possibly mute for bluetooth
25 - Steering wheel controls
26 - Multicentre display unit (not fitted on my 380, but the wire is there, maybe just part of the bluetooth harness)
27 - Multicentre display unit (not fitted on my 380, but the wire is there, maybe just part of the bluetooth harness)
28 - *FREE*
29 - *FREE*
30 - Steering wheel controls
So there are at least three unused pins on the back whose function I simply can't find and which would potentially allow an aux in. I have tried holding down the CD button for an aux in, but that brings up nothing.
I've googled the model number stamped on the unit, but no joy.
Does anyone on here possibly know what Pin 9 does on the 14pin connector, and what the three free pins do on the smaller 10pin connector? I'm fairly confident the yellow wire on pin 24 is the telephone mute, and I could quite easily remove the headunit and trace the yellow wire back to the parrot box.
If someone buys the MR936542 part, I'd like to have a quick look at it before install - be interested in which pins are connected and where they go.
caminorey
18-04-2011, 08:52 AM
There has to be a trigger wire somewhere to make the head unit go to AUX mode. I have the six-stacker and I cannot get into it either, but we all know it's there.
Try grounding out the free pins on the connector all at once, and see if you can enter AUX mode there.
Unfortunately for me the six-stacker requires a specific digital input to allow it to enter AUX mode, as I was going to do this exact same thing. I have been toying with the idea of buying a cheap, possibly broken external CD stacker and chopping up the wiring to get the same effect. Basically just connecting the left and right audio inputs to the harness and keeping the rest of it in tact, so the stacker sends the specific input to allow AUX, and sound comes from whatever I plug in.
Guess that doesn't help you too much though. lol
flyboy
18-04-2011, 12:36 PM
Hi caminorey.
Well, it does help - a little. It's interesting that the six stacker also does not go into aux mode unless you actually have something connected to the 13pin. This suggests, as you hinted, that something there needs to be grounded before that option becomes available and it possibly works the same way with the 10pin connector on the single CD head unit. The three free pins would be enough - one to ground to indicate there is an aux input, and two for inputs. But that doesn't explain how the MR936542 part allows the headunit to control the bluetooth volume (unless of course the aux input becomes the phone, but then surely it would then come out of all speakers and not just the front left). I wonder if anyone has confirmed the MR936542 part actually works with the single CD head unit.
The other possibility is that the three pins are part of the phone mute and allow the phone to input into the headunit (which the factory bluetooth bypasses altogether, other than the mute wire).
Keep the good info coming. If I get the chance tonight, I'll try grounding out each of the three free pins individually and see what happens, and if I can access an AUX input.
Foozrcool
18-04-2011, 02:03 PM
I should get my MR936542 tomorrow but I have a 6 CD stacker so may not help either. I have the ipod adaptor which comes up as CD2 when you press & hold CD.
flyboy
18-04-2011, 04:07 PM
Hi Fooz.
It will still help my cause because I'm hopeful that the MR936542 is suited to both the 6 stacker and single CD units. If it is, should give me an insight into what pins do what, particularly on the 10pin head unit connector.
Can I ask a few favours before you install it?
1. Does the paperwork indicate it is suitable for all 380s, or only those with the stacker?
2. Can you post up a copy of the instructions?
3. Can you take some photos of the wiring loom, and in particular the wires going into each connector and where each one connects to. I'm particularly interested in the wires which go into 23/28/29 to the C-117 connector - service manual - circuit diagrams - page 82.
The goal is to work out if the bluetooth is actually feeding audio into the head unit, as this would indicate something like an ipod could be input in the same way.
Foozrcool
18-04-2011, 04:13 PM
Yep will see what I can do. I have both the ipod adaptor & phone kit. From memory the phone kit goes in series with the harness connectors so will be interesting to see what the MR936542 does.
Blackstar
18-04-2011, 05:07 PM
My 380 platinum has all the connectors tucked in behind the dash....I have successfully put in the cd player, the 6 stacker and now the Sat Nav and all the connectors are there.
They were covered in a sound absorbing foam the first time I went looking for them.
EDIT:
Why don't you plug in the 6 stacker...they are cheap enough and far better than the single player.( I reckon Madmagna has everything you need for a cuppla hubdred bucks?)
The Ipod adapter has been proven to work with it in another thread.
flyboy
18-04-2011, 05:35 PM
Bit of an update.
The single CD player part number is 122001-7040A101, made by Fujitsu Ten.
The yellow wire on the 10pin connector (pin 24), is definitely the phone mute - when grounded it when into "Phone" mode.
I've tried grounding out the three free pins to see if the unit enters an Aux mode (and holding down the CD button while doing so), but no joy :(
This suggests to me that the function of the other three pins is input of the phone device (ie the "Phone" input is the only external input possible). The current factory bluetooth setup doesn't use this - is simply mutes the radio and then connects itself directly to the left front speaker without any head unit involvement.
An ipod input could still possibly work unless you have the MR936542, which I expect sends the phone output to the head unit so that the volume can be used. How it is then that the output still only gets to the front left speaker?
I figure you could put the MIT-POD cable or similar to the head unit inputs for the phone. Then you could essentially play the ipod through the head unit as "Phone".
It gets tricky when you want both the bluetooth for an actual phone and the ipod input at the same time - ie, if you were driving along using the ipod and "Phone" was displayed, how would you know if the Parrot unit starts calling?
I'm going to sit down and draw out some circuit diagrams. Once I get details on how MR936542 works, I might be able to wire up a few relays so that all three can be used together - and the Parrot unit will have priority. I guess the other option is to allow the phone output through all four speakers - but that would require relocation of the microphone.
Updated info:
14 pin Connector
1 - Speaker output
2 - Speaker output
3 - Antenna gain power (provides power to the antenna amplifier)
4 - Park lights sense (turns on backlighting)
5 - Speaker output
6 - Speaker output
7 - Speaker output
8 - Speaker output
9 - *Don't know* Possibly provides power sense to auxillary unit, like an external amp (tells external amp to turn on if radio is on)
10 - Ignition sense (turns on unit when key is turned to ACC)
11 - Battery (permanent power, allows memory to be retained)
12 - Light dimming rheostat (from instrument cluster, dims backlighting)
13 - Speaker output
14 - Speaker output
10 Pin Connector (For some reason numbered 21-30 in the service manual)
21 - Multicentre display unit (not fitted on my 380, but the wire is there, maybe just part of the bluetooth harness)
22 - Multicentre display unit (not fitted on my 380, but the wire is there, maybe just part of the bluetooth harness)
23 - *FREE*
24 - System mute for phone
25 - Steering wheel controls
26 - Multicentre display unit (not fitted on my 380, but the wire is there, maybe just part of the bluetooth harness)
27 - Multicentre display unit (not fitted on my 380, but the wire is there, maybe just part of the bluetooth harness)
28 - *FREE*
29 - *FREE*
30 - Steering wheel controls
Foozrcool
18-04-2011, 05:45 PM
Well I have the lot installed so will be able to tell you what happens with the ipod etc when I plug it all in.
flyboy
18-04-2011, 06:43 PM
No worries - how the ipod reacts on your system doesn't really matter - it goes through the 13pin din connector which we don't have on the single CD model. The key will (I think) be in new connections between the 10pin connector and the bluetooth module.
Just pulled out the factory bluetooth module - has a little black box at the back which might hold clues as to how it all works.
The factory bluetooth unit is really tricky to get out. Plus the wiring is taped and insulated which makes it really hard to tell what is going. One day if I have some more time, I'll put the bluetooth unit right out and undo all the insulation and tape.
EDIT:
Why don't you plug in the 6 stacker...they are cheap enough and far better than the single player.( I reckon Madmagna has everything you need for a cuppla hubdred bucks?)
The Ipod adapter has been proven to work with it in another thread.
Well yes, I could do that. But I'd prefer to see if there's a way of doing an input on the single system - I think it looks cleaner than the radio/heater stuff integrated into the same panel.
If I can come up with some way of getting it to work with the single CD, I can post up some instructions for everyone to use.
Foozrcool
18-04-2011, 06:52 PM
No worries - how the ipod reacts on your system doesn't really matter - it goes through the 13pin din connector which we don't have on the single CD model. The key will (I think) be in new connections between the 10pin connector and the bluetooth module.
It matters to me lol
I just hope this all works properly with the new audio system setup I'm installing if not there might be a factory bluetooth kit (including volume mod) up for sale ;)
Blackstar
18-04-2011, 09:00 PM
No worries - how the ipod reacts on your system doesn't really matter - it goes through the 13pin din connector which we don't have on the single CD model.
.
I think you'll find that platinum models have the single CD and yes, they do have all the wiring to plug in any player without modification, just the wiring is concealed at the rear....so does the GT and VRX in series 3.
Of course yours may be an exception if it is an early Es or SX...
I've got the whole loom in a box here.
.
Madmagna
18-04-2011, 09:07 PM
The goal is to work out if the bluetooth is actually feeding audio into the head unit, as this would indicate something like an ipod could be input in the same way.
Think I can add something in here, the Parrot system does not input anything into the audio units, it simply cuts the audio signal to the speakers and routes teh conversation to the speakers and mic, this is about it
All they do is run the speaker into the parrot and back out to the head unit, the parrot cuts speakers and brings in phone
The Platinum I have here has the stacker BTW, has pretty much everything including the bluetooth etc etc
What I would like to know is how to fit the stacker and integrated unit into the base model, the ones that dont have the wiring.
flyboy
18-04-2011, 09:15 PM
Hi Blackstar. I have a series III sports, which is an ES.
Yes, the wiring loom for the radio is there and is common between both units.
But unfortunately the wiring for the multi centre display is not there. So even though the radio will wire up and work, you can't ever see what station or input it is on.
Think I can add something in here, the Parrot system does not input anything into the audio units, it simply cuts the audio signal to the speakers and routes teh conversation to the speakers and mic, this is about it
All they do is run the speaker into the parrot and back out to the head unit, the parrot cuts speakers and brings in phone
What I would like to know is how to fit the stacker and integrated unit into the base model, the ones that dont have the wiring.
Yes, Madmagna you are correct - the standard factory bluetooth simply mutes the radio and then taps into the front left speaker wiring to play the audio. But it's not that simple with the volume mod installed... because then the volume of the bluetooth is controlled with the head unit.
Blackstar
18-04-2011, 09:24 PM
Hi Blackstar. I have a series III sports, which is an ES.
Yes, the wiring loom for the radio is there and is common between both units.
But unfortunately the wiring for the multi centre display is not there. So even though the radio will wire up and work, you can't ever see what station or input it is on.
Yeah...i hear what you are saying...but...my Gt had the sat Nav fitted in the factory and i couldn't get to all the nice options like one press of teh remote to open all the doors etc.
So i pulled the dashboard apart...( I had the povo clock and no multi-display).
At first glance i thought like you...no cable...but it was buried in the guts of the dash board rear.
All I say is have a deep poke around...mine was all cable tied back and hidden?
Just surprising if they went through the cost of multiple wiring looms...is yours a manual as well? that may make a difference in wiring looms?
Foozrcool
18-04-2011, 09:36 PM
The multi display also throws up a phone message when on a call indicating there is more to it than just muting the stereo & interupting speakers.
flyboy
18-04-2011, 09:55 PM
Yeah, mine is a manual.
I'm quite sure the loom isn't there, because the 10pin connector which comes out of the radio and which carries the information for the multi display does not have those four wires. If the loom was hidden back there and Mitsubishi made exactly the same loom for every model, my radio 10pin connector would have had 6 wires, not 2.
I'll have another dig around, but doubt it.
I'm guessing your loom was there because it is a GT, which normally has the MCD, and then when they installed the AVN6000 they just tied the MCD loom somewhere out of the way.
The multi display also throws up a phone message when on a call indicating there is more to it than just muting the stereo & interupting speakers.
That only takes one additional wire into the head unit... The yellow mute wire. The radio knows to shutup, and displays "phone" which gets sent to the display through the standard MCD wires which are there regardless of the factory bluetooth.
Blackstar
19-04-2011, 03:38 PM
I'm guessing your loom was there because it is a GT, which normally has the MCD, and then when they installed the AVN6000 they just tied the MCD loom somewhere out of the way.
.
I fitted a 6 stacker and multi display to my son's Platinum, it had the clock instead of multi display and it had all the connectors hidden inside as well.....(another reason i mentioned it cause it comes standard with the single unit)
So that's two cars I've done it on now.....
Foozrcool
20-04-2011, 08:58 PM
I picked up that part today .... pretty disappointing, huge brown box with a tiny wiring loom in it lol
It basically goes in series with the factory 10 pin connector & then also plugs into the bluetooth interface.
flyboy
20-04-2011, 09:56 PM
Got any close up photos?
Foozrcool
20-04-2011, 10:06 PM
Got any close up photos?
http://i253.photobucket.com/albums/hh60/foozrcool/f7800e0e.jpg
flyboy
20-04-2011, 10:15 PM
Great, thanks.
*mind ticking over madly*
Does is still only output the phone through the front left speaker? Or all four now?
Foozrcool
20-04-2011, 10:18 PM
The paperwork looks like a copy of a copy of a copy & tells bugger all.
Basically the 10 pin connectors go in series with the factory loom & the others plug into the bluetooth unit.
flyboy
20-04-2011, 10:27 PM
So I'm guessing the following:
1. The connector on the far right plugs into the head unit and has all ten pins wired.
2. The next white connecter accepts the plug which was previously into the head unit and has seven pins wired.
3. The blue plug on the far left plugs into the bluetooth unit.
4. The blue plug at the end of the short extension accepts the plug which previously went into the bluetooth unit.
Is this right?
Foozrcool
20-04-2011, 10:27 PM
Great, thanks.
*mind ticking over madly*
Does is still only output the phone through the front left speaker? Or all four now?
Not sure I haven't installed it as yet. I actually have my dash pulled apart for an audio install with no head unit or air cond but can tell you the bluetooth still works through the passenger speaker without the headunit.
I'd imagine it will be the same as the mic is right next to the drivers tweeter so wouldn't work real well if it was all speakers.
Foozrcool
20-04-2011, 10:30 PM
So I'm guessing the following:
1. The connector on the far right plugs into the head unit and has all ten pins wired.
2. The next white connecter accepts the plug which was previously into the head unit and has seven pins wired.
3. The blue plug on the far left plugs into the bluetooth unit.
4. The blue plug at the end of the short extension accepts the plug which previously went into the bluetooth unit.
Is this right?
Correct except 1. Right plug has 9 wires & 2. Other plug has 6 wires.
Foozrcool
20-04-2011, 10:42 PM
The blurb also states that whatever you set the bluetooth volume at with the headunit volume control is memorised & totally seperate from the normal audio function which is good!
flyboy
20-04-2011, 10:43 PM
Correct except 1. Right plug has 9 wires & 2. Other plug has 6 wires.
Okay, so it's a mono input from the bluetooth unit. Let's just hope the headunit is capable of accepting a stereo input, as an ipod input in mono would suck.
Foozrcool
21-04-2011, 06:07 AM
Okay, so it's a mono input from the bluetooth unit. Let's just hope the headunit is capable of accepting a stereo input, as an ipod input in mono would suck.
If the bluetooth box will spit out stereo there is no reason why you can't do it.
Like I said I have the CD stacker & air/cond control plate out of my car at the moment for the audio install & the bluetooth still works via the passenger speaker. So if you intercepted the drivers speaker in the same way I can't see how it couldn't work.
JC-VRX
24-04-2011, 08:08 AM
Thanks to this thread, I managed to get the audio interrupt on my Samsung blue tooth working. My VRX didn't have a wire for the audio mute, but putting the audio wire from the bluetooth into the pin where there should have been a wire did the trick (on the 10 pin connector, it's second from the left on the bottom row). Thanks to all for the pinout info.
Foozrcool
26-04-2011, 08:24 AM
Just for your info, here is a wiring diagram for our Parrot kit showing all pinouts for all 4 car speakers - http://www.parrot.com/fr/support/guidesutilisateur/parrot_ck3000-evo_user-guide_fi.pdf
flyboy
27-04-2011, 09:21 PM
I fitted a 6 stacker and multi display to my son's Platinum, it had the clock instead of multi display and it had all the connectors hidden inside as well.....(another reason i mentioned it cause it comes standard with the single unit)
So that's two cars I've done it on now.....
Had another (very thorough) look to try and come up with a definitive answer on this. Theres is definitely no loom in my car.
I expect the difference is that the Series 2 platinum was built on an SX platform, while the Series 3 Sports was built on the ES platform. While both were only fitted with the clock/single CD player, the SX had the more complex wiring loom.
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