Incorrect wiper operation

another_clean_sheet · 3rd March 2022, 09:38

With the wiper control arm in the intermittent, slow and fast postions the wipers only go at the normal slow speed.
I have not had time to check yet but is this a sign of a wet ECU (it is a diesel) or should I be looking elsewhere?
Thanks.

BigRuss · 3rd March 2022, 12:11

It certainly isn't a wet ECU, it's either a wiring or BCU fault.

Russ

another_clean_sheet · 3rd March 2022, 16:20

Quote:

Originally Posted by BigRuss

It certainly isn't a wet ECU, it's either a wiring or BCU fault.

Russ

Seeing it has worked for the last 7years it is unlikely to be a wiring fault. Where is the BCU? Is it something you can test for me?
Thanks.

BigRuss · 3rd March 2022, 18:21

By BCU fault I meant configuration it's extremely rare for a BCU to fail, In all the years I've been working on these cars I've only changed two that were faulty, one had been damaged by someone trying to fix a fault and the other was a prototype one that had never worked properly from new.

You could try another stalk and see if that is causing the problem.

Has your car got rain sensing wipers?

Russ

another_clean_sheet · 3rd March 2022, 18:24

Quote:

Originally Posted by BigRuss

By BCU fault I meant configuration it's extremely rare for a BCU to fail, In all the years I've been working on these cars I've only changed two that were faulty, one had been damaged by someone trying to fix a fault and the other was a prototype one that had never worked properly from new.

You could try another stalk and see if that is causing the problem.

Has your car got rain sensing wipers?

Russ

Yes Russ. It is a 2005 Contemporary SE

another_clean_sheet · 4th March 2022, 13:56

I hope it is not a MOT failure as it has got to go in this month.

3rd March 2022, 09:38	#1
another_clean_sheet Posted a thing or two Rover 75 CDTI Tourer Join Date: Nov 2014 Location: Great Bardfield, nr Braintree Posts: 1,416 Thanks: 303 Thanked 436 Times in 317 Posts	Incorrect wiper operation With the wiper control arm in the intermittent, slow and fast postions the wipers only go at the normal slow speed. I have not had time to check yet but is this a sign of a wet ECU (it is a diesel) or should I be looking elsewhere? Thanks.

3rd March 2022, 12:11	#2
BigRuss Premium Trader 75 CDT Tourer,2.5 Launch Saloon, Omipro MG/Rover (T4) Join Date: Jul 2007 Location: Liversedge, West Yorkshire Posts: 5,408 Thanks: 1,105 Thanked 1,340 Times in 661 Posts	It certainly isn't a wet ECU, it's either a wiring or BCU fault. Russ __________________ Replacement Key Service http://https://the75andztclub.co.uk/...d.php?t=244732 Full T4 Testbook diagnostics available. Diesel ECU repair and replacement. Options enabled or disabled as required. Diesel X-Power 135 and 160bhp, Rover 1.8T 150 to 160 MG 160 V6 to 177 upgrades available P.M. for details.

3rd March 2022, 18:21	#4
BigRuss Premium Trader 75 CDT Tourer,2.5 Launch Saloon, Omipro MG/Rover (T4) Join Date: Jul 2007 Location: Liversedge, West Yorkshire Posts: 5,408 Thanks: 1,105 Thanked 1,340 Times in 661 Posts	By BCU fault I meant configuration it's extremely rare for a BCU to fail, In all the years I've been working on these cars I've only changed two that were faulty, one had been damaged by someone trying to fix a fault and the other was a prototype one that had never worked properly from new. You could try another stalk and see if that is causing the problem. Has your car got rain sensing wipers? Russ __________________ Replacement Key Service http://https://the75andztclub.co.uk/...d.php?t=244732 Full T4 Testbook diagnostics available. Diesel ECU repair and replacement. Options enabled or disabled as required. Diesel X-Power 135 and 160bhp, Rover 1.8T 150 to 160 MG 160 V6 to 177 upgrades available P.M. for details.

4th March 2022, 13:56	#6
another_clean_sheet Posted a thing or two Rover 75 CDTI Tourer Join Date: Nov 2014 Location: Great Bardfield, nr Braintree Posts: 1,416 Thanks: 303 Thanked 436 Times in 317 Posts	I hope it is not a MOT failure as it has got to go in this month.