Electrical problems

ProudRoverOwner · 15th August 2020, 14:24

Hi', I got caught in a flood a couple of days ago in my Rover 2002 75 diesel Connoisseur and now my electrics have gone troublesome. The key fob won't operate the door locks, the indicators are playing up and I get an ER message on my heater control. is it possible I have flooded the ECU and can I do anything to solve the problem please. Can I change the ECU if that turns out to be the problem and if so does it need to be done by a professional please. I cleaned out the plenum a couple of months ago.

Yorkshire GOC · 15th August 2020, 16:44

Hi,

Take a look at this link and scroll down to see causes for the ER message - not your ECU - but the Kanbus - and possibly your light switch module that controls the lights.

https://the75andztclub.co.uk/forum/s...d.php?t=251924

Mike Noc · 16th August 2020, 13:12

Do your front door window switches work correctly or are they reversed?

ProudRoverOwner · 16th August 2020, 19:40

Hi thanks but what and where is the Kanbus please and is that the same as a K-bus. I had no idea I had one of those. I have disconnected the battery and reconnected it but the problems have come back. The window switches are working fine but the problem has happened before especially when i turn on the AC.

vitesse · 16th August 2020, 21:03

As in the supplied link, if you have a fuel burning heater try disconnecting that or make your way down to Newton Abbot and visit Exeter Road Garage where they have a Rover diagnostic T4 computer. They are listed under the traders menu.

Regards

SD1too · 17th August 2020, 08:37

Hi John,

You say the problem has happened before. Do you mean before you were caught in the flood? If yes then it sounds like a K-bus fault. But if I were you I would uncover the plenum chamber to check that the drains aren't blocked. The ECM sits in there and the BCU (which controls much of the equipment you've mentioned) is vulnerable to water ingress behind the passenger side glovebox.

Simon

ProudRoverOwner · 19th August 2020, 00:54

I'm very grateful for all of the above advice and I am systematically going through all of the advice however I need to know where is the K-Bus please. So far I understand that it is probably underneath the carpet but where under the carpet please so that I can determine if it is showing any sign of corrosion or water ingress.

I have since found previous posts on here that relate exactly to the same problems that I am having so to explain the symptoms which can work and fail sporadically are:

* No indicator or headlight tell tale on the dash
* Climate control shows Er where temp should be
* Boot won't open
* Car won't lock from fob (unlocks fine)

I repeat Please where is the K-Bus module and should I can start disconcerting cables or is that too dangerous.

SD1too · 19th August 2020, 07:42

Hi John,

The full beam warning light not appearing confirms it's the K-bus. Read through this thread and post no. 15 will tell you what to do.

Simon

ProudRoverOwner · 19th August 2020, 15:47

Thank you very much Simon, I have read the item you told me to but Please where exactly can I find the K-bus module please, the article does not tell me where to find it. I want to check first to see if there is any signs of damp but I don't know where to look for it.

ADO282 · 19th August 2020, 16:15

Quote:

Originally Posted by ProudRoverOwner

Thank you very much Simon, I have read the item you told me to but Please where exactly can I find the K-bus module please, the article does not tell me where to find it. I want to check first to see if there is any signs of damp but I don't know where to look for it.

You will find the K-Bus is not a module, but the way the various ECU communicate with one another.

I shall stand aside and allow someone with more experience of these things to explain further.

15th August 2020, 14:24	#1
ProudRoverOwner Newbie Rover 75 Tourer Join Date: Aug 2014 Location: Crediton Posts: 10 Thanks: 0 Thanked 3 Times in 1 Post	Electrical problems Hi', I got caught in a flood a couple of days ago in my Rover 2002 75 diesel Connoisseur and now my electrics have gone troublesome. The key fob won't operate the door locks, the indicators are playing up and I get an ER message on my heater control. is it possible I have flooded the ECU and can I do anything to solve the problem please. Can I change the ECU if that turns out to be the problem and if so does it need to be done by a professional please. I cleaned out the plenum a couple of months ago.

15th August 2020, 16:44	#2
Yorkshire GOC I really should get out more....... Rover 75 connoisseur se v6 auto Join Date: May 2014 Location: Hull Posts: 2,064 Thanks: 1,842 Thanked 623 Times in 469 Posts	Hi, Take a look at this link and scroll down to see causes for the ER message - not your ECU - but the Kanbus - and possibly your light switch module that controls the lights. https://the75andztclub.co.uk/forum/s...d.php?t=251924 __________________ 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.

17th August 2020, 08:37	#6
SD1too Doesn't do things by halves Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007 Location: Former Middlesex Posts: 20,372 Thanks: 1,587 Thanked 3,749 Times in 3,181 Posts	Hi John, You say the problem has happened before. Do you mean before you were caught in the flood? If yes then it sounds like a K-bus fault. But if I were you I would uncover the plenum chamber to check that the drains aren't blocked. The ECM sits in there and the BCU (which controls much of the equipment you've mentioned) is vulnerable to water ingress behind the passenger side glovebox. Simon __________________ "Whatever is rightly done, however humble, is noble." Sir Henry Royce.

19th August 2020, 00:54	#7
ProudRoverOwner Newbie Rover 75 Tourer Join Date: Aug 2014 Location: Crediton Posts: 10 Thanks: 0 Thanked 3 Times in 1 Post	I'm very grateful for all of the above advice and I am systematically going through all of the advice however I need to know where is the K-Bus please. So far I understand that it is probably underneath the carpet but where under the carpet please so that I can determine if it is showing any sign of corrosion or water ingress. I have since found previous posts on here that relate exactly to the same problems that I am having so to explain the symptoms which can work and fail sporadically are: * No indicator or headlight tell tale on the dash * Climate control shows Er where temp should be * Boot won't open * Car won't lock from fob (unlocks fine) I repeat Please where is the K-Bus module and should I can start disconcerting cables or is that too dangerous. Last edited by ProudRoverOwner; 19th August 2020 at 02:18..

19th August 2020, 07:42	#8
SD1too Doesn't do things by halves Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007 Location: Former Middlesex Posts: 20,372 Thanks: 1,587 Thanked 3,749 Times in 3,181 Posts	Hi John, The full beam warning light not appearing confirms it's the K-bus. Read through this thread and post no. 15 will tell you what to do. Simon __________________ "Whatever is rightly done, however humble, is noble." Sir Henry Royce.

16th August 2020, 13:12	#3
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: 11,548 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	Do your front door window switches work correctly or are they reversed?

16th August 2020, 19:40	#4
ProudRoverOwner Newbie Rover 75 Tourer Join Date: Aug 2014 Location: Crediton Posts: 10 Thanks: 0 Thanked 3 Times in 1 Post	Hi thanks but what and where is the Kanbus please and is that the same as a K-bus. I had no idea I had one of those. I have disconnected the battery and reconnected it but the problems have come back. The window switches are working fine but the problem has happened before especially when i turn on the AC.

16th August 2020, 21:03	#5
vitesse I really should get out more....... Rover 75 Saloon Join Date: Jul 2011 Location: Gävle Posts: 2,532 Thanks: 395 Thanked 823 Times in 652 Posts	As in the supplied link, if you have a fuel burning heater try disconnecting that or make your way down to Newton Abbot and visit Exeter Road Garage where they have a Rover diagnostic T4 computer. They are listed under the traders menu. Regards

19th August 2020, 15:47	#9
ProudRoverOwner Newbie Rover 75 Tourer Join Date: Aug 2014 Location: Crediton Posts: 10 Thanks: 0 Thanked 3 Times in 1 Post	Thank you very much Simon, I have read the item you told me to but Please where exactly can I find the K-bus module please, the article does not tell me where to find it. I want to check first to see if there is any signs of damp but I don't know where to look for it.