Facelift Auto Diesel non-start - Page 2

Mike Noc · 15th December 2013, 08:00

Second plug in from the left on top of the ECM (only has 3 wires going in to it) Pin 10 to ground. On my car the wire was black/grey, but not listed as that colour on the circuit diagram I had - Brian came to the rescue as the colours were changed on the later cars.

75Connie · 15th December 2013, 09:36

When you did that, and got the engine to fire successfully, had the oil light come on ok? Also did you notice whether the CheckEngine lights behaved any differently on the occasions when it started ok vs when it wouldn't start?

Mike Noc · 15th December 2013, 18:27

Yep the oil light started doing exactly what it should. I didn't see any difference in the engine management light though.

Interestingly l first tried removing the fuel pump relay and putting a bridging wire into the power pins, but that didn't work, so there is more to grounding the control side than just running the pumps.

Mike Noc · 20th December 2013, 17:52

Well the car is now back on the road and positively flying. Many thanks to Marinabrian for his help with what turned out to be another failed ECM.

Brian diagnosed the problem, cloned a replacement ECM and waved the 'go faster' magic wand over it.

He also provided much needed wiring diagram info as the cable colours had changed for the later cars, which is much appreciated.

It now drives superbly. Just need to tidy a few things up and replace the thermostat.

15th December 2013, 08:00	#11
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: 11,584 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	Second plug in from the left on top of the ECM (only has 3 wires going in to it) Pin 10 to ground. On my car the wire was black/grey, but not listed as that colour on the circuit diagram I had - Brian came to the rescue as the colours were changed on the later cars.

15th December 2013, 09:36	#12
75Connie Gets stuck in R75 Connoisseur CDT (116PS) Saloon Auto; R75 Connoisseur CDT (116PS) Tourer Manual Join Date: Jan 2013 Location: Athlone, Ireland Posts: 581 Thanks: 91 Thanked 75 Times in 58 Posts	When you did that, and got the engine to fire successfully, had the oil light come on ok? Also did you notice whether the CheckEngine lights behaved any differently on the occasions when it started ok vs when it wouldn't start?

15th December 2013, 18:27	#13
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: 11,584 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	Yep the oil light started doing exactly what it should. I didn't see any difference in the engine management light though. Interestingly l first tried removing the fuel pump relay and putting a bridging wire into the power pins, but that didn't work, so there is more to grounding the control side than just running the pumps.

20th December 2013, 17:52	#14
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: 11,584 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	Well the car is now back on the road and positively flying. Many thanks to Marinabrian for his help with what turned out to be another failed ECM. Brian diagnosed the problem, cloned a replacement ECM and waved the 'go faster' magic wand over it. He also provided much needed wiring diagram info as the cable colours had changed for the later cars, which is much appreciated. It now drives superbly. Just need to tidy a few things up and replace the thermostat.