NG4 Bluetooth microphone not working

[polmaxbg]

Hello all,

I have Citroen c5 x7 - 2011 with NG4 navigation. I did some modifications on the interior and now it is with Exclusive + saloon, previously was Exclusive. So the car was parked for more than 3 weeks. Since then I have problem with my microphone when I want to make calls via bluetooth. I'm able to hear the receivers of the call, but they can't hear me. I tried to reconnect my phone again with the system, but it didn't work. Do you have any idea what I can do? Every cable seems to be attached properly to the NG4 panel. There is nothing missing.

Thanks in advance!

[GiveMeABreak]

Can you explain what you did, as I don't understand what modifications you made?

1) Exclusive / Exclusive plus - there's no such model, it is just Exclusive. The only differences will be the optional extras and feature packs ordered at factory when the order was placed.

2) Are you saying you have installed the NG4 system in the car that did not have it originally?

Best to pop your VIN up so I can see what your car originally had.

[polmaxbg]

VF7**************[VIN obfuscated, can be read by forum staff]

2) No, the car originally has NG4. I changed the front and back seats, all door panels, the dashboard and the center console.

[polmaxbg]

You can see the video of my modifications

[GiveMeABreak]

As this had an original NG4 system fitted, the only thing I can think of is that you have disturbed a wiring loom whilst you were doing whatever it was with the centre console that has affected the microphone.

One way to possibly confirm this is to use the internal telephone (requires active SIM card) not the bluetooth telephone. If the same behaviour is happening when making a call with the internal SIM phone then that rules out the Bluetooth issues. I would then suspect you have disturbed the microphone wiring somewhere as this goes from a ribbon cable in the ceiling where the microphone is located and disappears into the looms, so may easily have been upset whilst you were working on the centre console or other areas.

[polmaxbg]

Do you have any idea how this cable looks like or where exactly should be plugged in the NG4?

[GiveMeABreak]

Ok, so here are the main pinouts. The Microphone is in 'Part 'b', however, be aware that your vehicle, like mine has the service module installed. This is essentially similar to an independent telematic unit (similar but not the same), so for emergency services (SOS and Citroen Services) functions to work it uses the SIM card to make these emergency calls and geolocation features. The Services module therefore takes a lot of connections first (including the microphone) and then passes these on tot he NG4. So you won't be able to trace the wire from the ceiling as it will disappear into the loom and then go to the Service Module before being wired back to the NG4 via the quadlock.

"a" Aerial FM2.
"b" Aerial TV2 (for Japan).
"c" Aerial TV1 (for Japan).
"d" MQS cable connector.
"e" 3-part connector.
"f" GPS aerial .
"g" Aerial FM1/AM.
"h" LVDS 2 cable connector.
"j" USB socket connector.
"k" LVDS 1 cable connector.

"d" 12-way Blue connector

Channel number	Allocation of channels of connector
1	Audio signal + (Service module)
2	Audio signal - (Service module)
3	CAN High
4	Channel not allocated
5	Channel not allocated
6	Channel not allocated
7	Channel not allocated
8	Channel not allocated
9	VAN Low
10	Channel not allocated
11	Channel not allocated
12	Channel not allocated

"e" 3-part connector

Part "A": 16 way connector

Channel number	Allocation of channels of connector
1	signal: Right hand rear speaker
2	signal: Front right hand speaker
3	signal: Front left hand speaker
4	signal: Rear left loudspeaker
5	Earth: Right hand rear speaker
6	Earth: Front right hand speaker
7	Earth: Front left hand speaker
8	Earth: Rear left loudspeaker
9	Supply: Screen DG4
10	Comfort CAN High
11	Channel not allocated
12	Battery + supply
13	Comfort CAN Low
14	Channel not allocated
15	Earth: Screen DG4
16	Earth

Part "B": 12 way connector

Channel number	Allocation of channels of connector
1	Video input no 1 +
2	Channel not allocated
3	Earth: Microphone
4	Right-hand audio auxiliary
5	LIN bus for screen DG4
6	Video input no 2 +
7	Video n°1 -
8	Channel not allocated
9	Input: Microphone signal
10	Left-hand audio auxiliary
11	Audio earth
12	Video n°2 -

Part "C": 12-way black connector (*)

Channel number	Allocation of channels of connector
1	Earth: CD changer
2	VAN Low: CD changer
3	Permanent +: CD changer
4	Right audio system: CD changer
5	Rear socket LH audio output signal
6	Channel not allocated
7	CAN High: CD changer
8	Earth: CD changer
9	Rear socket RH audio output signal
10	Left audio system: CD changer
11	Channel not allocated
12	Rear socket audio output earth