407 Coupe Wiring Diagram

[DHallworth]

Hello,

I don't suppose anyone has access to a wiring diagram for a 2010 407 Coupe 3.0 HDi do they?

The V6 HDi's weren't fitted with a low coolant sensor. In the 2.7 HDi there's an option to enable it in the BSI and people have retrofitted it without any problems. However, in the 3.0 HDi the option to enable the low coolant sensor has been removed.

I'm interested in the pins for the Water in Diesel sensor as I'm going to try and wire a low coolant alarm into this so that I should still get a warning light on the dashboard in the event of low coolant.

I'm looking for something similar to this image below that'll show me the details for all 3 plugs in the fuse box if at all possible.

Thanks in advance,

David.

[GiveMeABreak]

Leave it with me and I'll have a squiz tomorrow David. Pop up your VIN for the 407 which I'll need.

[DHallworth]

Thanks Marc!

VIN is VF3**************[VIN obfuscated, can be read by forum staff].

David.

[GiveMeABreak]

Ok, so this is all that is listed - 4050 on the first diagram is the Water in Diesel Sensor, which I have then expanded in the second diagram.

There is no further detail on the pins within the Engine Fusebox, other that diagram 3. They do not list any other detail David.

There is a list of the main codes here on the Wiki I put together:

https://frenchcarforum.co.uk/wiki/Elect ... ring_Codes

[DHallworth]

Thanks Marc, I'll print these off and get a look at them on paper.

I know on the 2.7 the low coolant sensor connects to the multi plugs at the top of the fusebox. I was hoping the water in diesel sensor on the 3.0 HDi might connect to something similar.

David.

[GiveMeABreak]

No problem, they’re SVG vector images, so will scale perfectly to any size.

[DHallworth]

Hi Marc,

Does the below look right to you?

Looking at the Water in Diesel Sensor (4050) in the middle image I can see the 3 pins on the sensor.

Pin 1 - 12v Supply - C4050 - Goes to EC73 and then to PSF1 via fuse F6 which connects to Pins 4 or 20 on the Grey plug.
Pin 2 - Earth (?) - M4050 - Goes to EM16 and then to MC16.
Pin 3 - Signal to ECU (?) - 403 - Goes to Engine Management ECU on Pin 11.

Wiring diagrams aren't my forte so just wanted a 2nd opinion

David.

[GiveMeABreak]

403 is the Water in diesel fuel detector info
M4050 is the Earth
C4050 is the positive.

Now not strictly correct as the C4050 positive goes into EC73, which is a d1 crimp ignition controlled supply protected by fuse number 73. This consists of:

Here's the socket references:

EC16 is the earthing crimp and MC16 is the earth.

As for Fuse F6 in the engine fusebox, PSF1, this would seem to show the protection for the auto gearbox, so may not be relevant - as the EC73 crimp brings together other wiring. 1603 is of course the auto gearbox.

[DHallworth]

Marc, that's brilliant, thank you very much!!

Will try and wire it up tomorrow and see if the car will interpret the values from the low coolant sensor the same way it would the water in diesel sensor.

David.

[GiveMeABreak]

Good Luck David, don't cross the streams and don't forget the

[wheeler]

Pin 3 - Signal to ECU (?) - 403 - Goes to Engine Management ECU on Pin 11.

Wiring diagrams aren't my forte so just wanted a 2nd opinion

David.

Remember there are multiple connectors on the engine ECU so there will be more than one pin 11. On this one its pin 11 on the 58 way black connector.

[DHallworth]

Thanks wheeler! that's a good point.

I've still not had a chance to try and wire this in yet.