ECU wows

martinsims · 3rd March 2020, 16:42

hi Having issues with the 75 2.0 CDTI 2005. Just stopped running. Had water in the box so sorted that out. (block drain). Took out ECU and dried. Took off cover and all looks good. Found Glow plug relay had shorted badly so have replaced that but still will not start. I noticed that the oil pressure warning does not come on in key postion two, also there a constant drain on the battery even when nothing is on. 1.7amps tested with clamp ammeter. disconnected the ECU but drain still present. removed all the relays and fuses but its still there. (not the interior lights) Any ideas?? Does the ECU need replacing?? can I just fit one? or does it need setting up? any idea about the electrical drain. I do not live anywhere near a T4 unit. Engine does turn over, (also fitted new cam sensor) could it be the crank sensor?? also is the oil light a clue?
Any thoughts please??

Yorkshire GOC · 3rd March 2020, 18:30

Good test for the crank sensor is when you turn her over does the rev counter move? If not then it could be the crank sensor.

Yorkshire GOC · 3rd March 2020, 18:32

If not he crank sensor drop Big Russ a PM -he is an expert on ECU's and carries a replacement stock.

trikey · 3rd March 2020, 18:32

Yes, the oil light is a good sign for a dead ecu.

markypicks · 3rd March 2020, 18:41

big russ up west yorkshire is the man to sort it out he does replacement ecu and re codes them to the car also does a fast turnaround on postal service rgds mark

MarkS · 3rd March 2020, 22:55

CB750CHRIS has a T4, can supply and fit replacement ECUs, and is near Fareham. Highly recommended.
Can also do spare keys.

3rd March 2020, 16:42	#1
martinsims Newbie rover 75 tourer Join Date: Mar 2020 Location: Basingstoke Posts: 1 Thanks: 0 Thanked 0 Times in 0 Posts	ECU wows hi Having issues with the 75 2.0 CDTI 2005. Just stopped running. Had water in the box so sorted that out. (block drain). Took out ECU and dried. Took off cover and all looks good. Found Glow plug relay had shorted badly so have replaced that but still will not start. I noticed that the oil pressure warning does not come on in key postion two, also there a constant drain on the battery even when nothing is on. 1.7amps tested with clamp ammeter. disconnected the ECU but drain still present. removed all the relays and fuses but its still there. (not the interior lights) Any ideas?? Does the ECU need replacing?? can I just fit one? or does it need setting up? any idea about the electrical drain. I do not live anywhere near a T4 unit. Engine does turn over, (also fitted new cam sensor) could it be the crank sensor?? also is the oil light a clue? Any thoughts please??

3rd March 2020, 18:30	#2
Yorkshire GOC I really should get out more....... Rover 75 connoisseur se v6 auto Join Date: May 2014 Location: Hull Posts: 2,067 Thanks: 1,842 Thanked 623 Times in 469 Posts	Good test for the crank sensor is when you turn her over does the rev counter move? If not then it could be the crank sensor. __________________ She came off the Longbridge Line on 20-05-2003 The Silver Machine was the 13th of 160 Rover 75's to come off the production line that day and is the 100th of 527 Starlight Silver Rover 75 2.5 V6 Connoisseur SE Auto saloons listed in the build records produced world wide.

3rd March 2020, 18:32	#3
Yorkshire GOC I really should get out more....... Rover 75 connoisseur se v6 auto Join Date: May 2014 Location: Hull Posts: 2,067 Thanks: 1,842 Thanked 623 Times in 469 Posts	If not he crank sensor drop Big Russ a PM -he is an expert on ECU's and carries a replacement stock. __________________ She came off the Longbridge Line on 20-05-2003 The Silver Machine was the 13th of 160 Rover 75's to come off the production line that day and is the 100th of 527 Starlight Silver Rover 75 2.5 V6 Connoisseur SE Auto saloons listed in the build records produced world wide.

3rd March 2020, 18:32	#4
trikey Premium Trader Rover 75 Join Date: Nov 2010 Location: Devon Posts: 33,771 Thanks: 8,837 Thanked 14,831 Times in 8,030 Posts	Yes, the oil light is a good sign for a dead ecu. __________________ Lest we forget..

3rd March 2020, 18:41	#5
markypicks Gets stuck in rover 75 saloon cdt club se re map 160 bhp Join Date: Dec 2018 Location: sheffield Posts: 558 Thanks: 227 Thanked 169 Times in 135 Posts	big russ up west yorkshire is the man to sort it out he does replacement ecu and re codes them to the car also does a fast turnaround on postal service rgds mark

3rd March 2020, 22:55	#6
MarkS Gets stuck in Rover 75 Diesel Tourer, called Perseverance Join Date: Nov 2011 Location: Bournemouth Posts: 664 Thanks: 189 Thanked 157 Times in 108 Posts	CB750CHRIS has a T4, can supply and fit replacement ECUs, and is near Fareham. Highly recommended. Can also do spare keys.