Fuel pump relay

chambl01 · 12th November 2021, 14:18

Hi all,

I have a 2003 cdt . Was working absolutely fine. Got into the car one early morning and wouldn't start. Noted both fuel pumps are not working. I'm somewhat confused as the pics on Google dont match my fuse box. I have found one but doesn't state where the fuel pump fuse is under the passenger foot well. Its says number 20 but I cant see any numbered ?

I have found the fuel relay may be down and it said it was the largest relay under the footwell , but all 3 the same size. It's been working sound for many years until now.

Battery is fully charged previous new intank and under bonnet pumps but weird both not working at the same time. This makes me think it's the relay. Can anyone confirm which one it is so I can get a new one. Would it also be worth resetting the fuel cut off switch ? It cranks but no fuel clearly coming from the pumps.

I have adequate fuel in my tank.

Any thoughts or if your able to point me in the right location greatly appreciated.

Thank you

vitesse · 12th November 2021, 14:40

This any help: https://www.the75andztclub.co.uk/for...d.php?t=284138 (thanks to T-cut)

Regards

COLVERT · 12th November 2021, 18:32

Fusebox Diagram-----------

Enter into --Search.

Mike Noc · 12th November 2021, 22:48

. The fuel pump relay is grounded by the ECM so check the wiring from the relay to the ECM and if that checks out then suspect a fault in the ECM.
Does the oil pressure light come on when the key is turned to position ll as it should?

.

chambl01 · 13th November 2021, 08:20

[QUOTE=Mike Noc;2907671]. The fuel pump relay is grounded by the ECM so check the wiring from the relay to the ECM and if that checks out then suspect a fault in the ECM.
Does the oil pressure light come on when the key is turned to position ll as it should?

Yes, oil light comes on as it should. I'll try the relay and go from there. I'm praying it's not the ECM . I've just spent alot of money, time and effort on the old girl. Hoping its something simple.

Plugged in OBD but doesn't read the car. Shame

vitesse · 13th November 2021, 09:35

[QUOTE Plugged in OBD but doesn't read the car. Shame[/QUOTE]

Use the search menu with the keyword Toaf. Toaf is a very easy to use freeware software (donate if you wish) works with any Windows PC (and now Android). Need a special obd cable, search ebay for Toaf. And unlike normal OBD readers it can access the whole car, use only in "read" mode until you are sure of what you're doing.

Regards

ps You can activate the fuel pump relay with Toaf

chambl01 · 13th November 2021, 08:13

[QUOTE=vitesse;2907611]This any help: https://www.the75andztclub.co.uk/for...d.php?t=284138 (thanks to T-cut)

Yes, that's the one. Thank you so much

12th November 2021, 14:18	#1
chambl01 Avid contributor Rover 75 Join Date: Aug 2014 Location: Cardiff Posts: 162 Thanks: 151 Thanked 75 Times in 28 Posts	Fuel pump relay Hi all, I have a 2003 cdt . Was working absolutely fine. Got into the car one early morning and wouldn't start. Noted both fuel pumps are not working. I'm somewhat confused as the pics on Google dont match my fuse box. I have found one but doesn't state where the fuel pump fuse is under the passenger foot well. Its says number 20 but I cant see any numbered ? I have found the fuel relay may be down and it said it was the largest relay under the footwell , but all 3 the same size. It's been working sound for many years until now. Battery is fully charged previous new intank and under bonnet pumps but weird both not working at the same time. This makes me think it's the relay. Can anyone confirm which one it is so I can get a new one. Would it also be worth resetting the fuel cut off switch ? It cranks but no fuel clearly coming from the pumps. I have adequate fuel in my tank. Any thoughts or if your able to point me in the right location greatly appreciated. Thank you Last edited by chambl01; 12th November 2021 at 14:24..

12th November 2021, 22:48	#4
Mike Noc This is my second home Rover 75 CDT Manual Connoisseur SE, Rover 75 CDT Automatic Connoisseur SE & a Freelander Td4. Join Date: Jul 2009 Location: Hampshire Posts: 11,550 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	. The fuel pump relay is grounded by the ECM so check the wiring from the relay to the ECM and if that checks out then suspect a fault in the ECM. Does the oil pressure light come on when the key is turned to position ll as it should? . Last edited by Mike Noc; 12th November 2021 at 22:53..

13th November 2021, 08:20	#5
chambl01 Avid contributor Rover 75 Join Date: Aug 2014 Location: Cardiff Posts: 162 Thanks: 151 Thanked 75 Times in 28 Posts	Oil light on [QUOTE=Mike Noc;2907671]. The fuel pump relay is grounded by the ECM so check the wiring from the relay to the ECM and if that checks out then suspect a fault in the ECM. Does the oil pressure light come on when the key is turned to position ll as it should? Yes, oil light comes on as it should. I'll try the relay and go from there. I'm praying it's not the ECM . I've just spent alot of money, time and effort on the old girl. Hoping its something simple. Plugged in OBD but doesn't read the car. Shame

13th November 2021, 08:13	#7
chambl01 Avid contributor Rover 75 Join Date: Aug 2014 Location: Cardiff Posts: 162 Thanks: 151 Thanked 75 Times in 28 Posts	That's the one [QUOTE=vitesse;2907611]This any help: https://www.the75andztclub.co.uk/for...d.php?t=284138 (thanks to T-cut) Yes, that's the one. Thank you so much

12th November 2021, 14:40	#2
vitesse I really should get out more....... Rover 75 Saloon Join Date: Jul 2011 Location: Gävle Posts: 2,536 Thanks: 395 Thanked 823 Times in 652 Posts	This any help: https://www.the75andztclub.co.uk/for...d.php?t=284138 (thanks to T-cut) Regards

12th November 2021, 18:32	#3
COLVERT This is my second home R75 Saloon. Join Date: Feb 2009 Location: France/or Devon. Posts: 14,003 Thanks: 3,851 Thanked 2,167 Times in 1,816 Posts	Fusebox Diagram----------- Enter into --Search.

13th November 2021, 09:35	#6
vitesse I really should get out more....... Rover 75 Saloon Join Date: Jul 2011 Location: Gävle Posts: 2,536 Thanks: 395 Thanked 823 Times in 652 Posts	[QUOTE Plugged in OBD but doesn't read the car. Shame[/QUOTE] Use the search menu with the keyword Toaf. Toaf is a very easy to use freeware software (donate if you wish) works with any Windows PC (and now Android). Need a special obd cable, search ebay for Toaf. And unlike normal OBD readers it can access the whole car, use only in "read" mode until you are sure of what you're doing. Regards ps You can activate the fuel pump relay with Toaf