Hi all, finally found out where the fuel pump relay is located: R4 in the aux junction box (see photos).

Does anyone have a Part Number or replacement for this relay? All it says is ++07414 1C and I have no idea what that is.

The issue arose after shutting the car down, the fuel pump sounded like it was staying on. There is an audible 'clicking' coming from the aux junction box when shutting down and starting up the car.

Any help would be appreciated. Thanks.

 

The relay part number is C2C34433 and has multiple functions. There are also 20 amp (C2S44654) and 40 amp (C2P11192) relays in that box.


What makes you think the relay needs to be replaced? Is there a starting or performance issue? Is the MIL on, and if so, what DTCs are stored?

 

I'm looking towards the relay since the pump sometimes stays on after shutting the warm car down. Cold starts are fine except once or twice when it did not rev past ~1500 RPMs.

Photo shows all the DTCs I have seen: P0101, P050b, P0232, P00ab

All but the P0101 have only shown up 1 time and they were never together. Not sure if the P0101 is relevant to this issue.

Is there anything I need to know about swapping the relay?

 

Remove it form the fuse box and you'll see Ford part numbers on the side. I expect the Ford part will be cheaper than the Jag part if you are looking to replace. If you are just problem solving you can swap with an identically marked relay form any of the 3 fuse boxes.

 

relays are easy to bench test look on YouTube

 

Prior to replacing relays and other steps, begin with checking the battery voltage across the terminals. With the ignition in the OFF position for at least ten minutes, the battery should have a minimum of 12.6 volts across the terminals. If not, replace the battery as this can be the source of many electrical faults with the X150.

If the battery has the correct voltage, check for vacuum leaks when the engine is cold as they can be the source of the P050b DTC. It may also be a good idea to clean the MAF using cleaner specifically for that purpose.

It's a good idea to swap relays for diagnosis as well.

Does the fuel pump shut off when the vehicle is locked with the remote? Many circuits do not fully shut down until the vehicle is locked and the alarm activated.

 

Ditto all of the above.

 

Looks like replacing the relay fixed the issue. Still not sure if it was the root cause but a $20 relay was worth it.

Here is a pic of the OEM (right) as well as the newer version (left) that replaced it. There is an extra prong in the center but there is nothing for it to plug into in my junction box so it doesn't affect anything.


Battery voltage is good and I keep it charged/maintained regularly. Locking the car didn't have an effect on the fuel pump staying on or off.

I've already cleaned the MAF sensors and replaced the filters so I'm still looking into the P0101 issue but for now at least I know the battery won't get drained via the fuel pump staying on... thanks for all the help!

 

In case anyone else has ever gotten a P0232 code =]

 

Digging out this thread, as I'm experiencing some issues with this P0232 code.

Is the part number C2C34433 (now superseded by T4N15705) actually the correct part to replace the fuel pump relay? I have spotted another relay with new part number T4N15704 which has the four pin only like the original in the car.
That technical bulletin is good to know, but lately on start up (occasionally not all the time) the engine would crank then switch straight back off. I have to press the start button a second (or third) time to get the car started up. The only code I have that could be related to this is the P0232. Reading this thread I'm thinking perhaps the relay is getting stuck on start up, and shows early signs of dying.

If the part number is the correct one, for the price of a relay, might as well just replace it, see if that does the trick. Won't do any harm to get a brand new relay on a 15year old car.