Electrical problems - Page 2

Mike Noc · 19th August 2020, 18:24

Yes as it's name suggests it is a bus system carrying information to and from some of the ECUs.

Do you have a SatNav? If so start with unpluggng that.

This was a suggested method of faultfinding the K-bus which I would happily credit, but I don't know who wrote it.

When diagnosing a difficult K Bus fault I found this to be the best method

1) Locate connector co289 behind the driver kick panel, it is a grey connector taped to the main loom

2) Label the ten wires (white with a red line and yellow band) so they can go back into the correct pin hole on the connector

3) Remove all ten wires, this is achieved by gently prising up the plastic and pulling the wire out

4) Insert pins 2, 3 and 4 which are the main K Bus interfaces IPK, LSM and BCU

5) Switch on the ignition and put the indicator stalk on left or right (You should have an indicator tell tale light on the dash)

6) Put each K Bus wire back into the connector one at a time in 20 second intervals (this gives the IPK time to test and realise there is a fault on that wire) When you place a wire in that has a fault the indicator tell tale on the dash fails to illuminate.

.

SD1too · 19th August 2020, 19:12

The author is MGMarc Mike and that's exactly the advice to which I linked in my post no. 8.

John; the ECU which primarily deals with the K-bus is called the GM6 body control unit. It is situated behind the passenger glove box if you want to check for water damage.

Simon

ProudRoverOwner · 20th August 2020, 02:38

Thank Simon,
I realise this must be infuriating for you and I am grateful for your trouble.
I finally have the information I need to start looking for the problem. "The GM6 body control unit behind the passenger glove box" and the connector co289 behind the driver kick panel. My CV joint seems to have been damaged as a result of the flood also so as soon as I can get that fixed if I have not been able to resolve the K-Bus issue I will try to get it to Exeter road garage for diagnostic specialist assistance.

ProudRoverOwner · 9th September 2020, 17:50

OK so I eventually took the car to Exeter Road Garage in Newton Abbott. They were very helpful and understood the problem immediately it turned out to be a faulty wire in the Can bus so he cut out the faulty wire and replaced it, problem solved. Thank you everyone for trying to help but I am sorry it took me so long to find Exeter Road Garage.

bluemalbert · 10th September 2020, 21:25

Quote:

Originally Posted by ProudRoverOwner

OK so I eventually took the car to Exeter Road Garage in Newton Abbott. They were very helpful and understood the problem immediately it turned out to be a faulty wire in the Can bus so he cut out the faulty wire and replaced it, problem solved. Thank you everyone for trying to help but I am sorry it took me so long to find Exeter Road Garage.

Ive been reading this thread with interest! I have the same issue, but have had a T4 on it so I know the faults that were showing although not had a chance to investigate. My question is, ' Do you know if the faulty wire (which was cut out) was in the C0289 connector or poss C580 (behind the passenger glove box) both showing up as a faulty connection or open circuit!

Mal.

19th August 2020, 18:24	#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: 11,547 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	Yes as it's name suggests it is a bus system carrying information to and from some of the ECUs. Do you have a SatNav? If so start with unpluggng that. This was a suggested method of faultfinding the K-bus which I would happily credit, but I don't know who wrote it. When diagnosing a difficult K Bus fault I found this to be the best method 1) Locate connector co289 behind the driver kick panel, it is a grey connector taped to the main loom 2) Label the ten wires (white with a red line and yellow band) so they can go back into the correct pin hole on the connector 3) Remove all ten wires, this is achieved by gently prising up the plastic and pulling the wire out 4) Insert pins 2, 3 and 4 which are the main K Bus interfaces IPK, LSM and BCU 5) Switch on the ignition and put the indicator stalk on left or right (You should have an indicator tell tale light on the dash) 6) Put each K Bus wire back into the connector one at a time in 20 second intervals (this gives the IPK time to test and realise there is a fault on that wire) When you place a wire in that has a fault the indicator tell tale on the dash fails to illuminate. . Last edited by Mike Noc; 19th August 2020 at 18:27..

19th August 2020, 19:12	#12
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: 20,344 Thanks: 1,587 Thanked 3,749 Times in 3,181 Posts	The author is MGMarc Mike and that's exactly the advice to which I linked in my post no. 8. John; the ECU which primarily deals with the K-bus is called the GM6 body control unit. It is situated behind the passenger glove box if you want to check for water damage. Simon __________________ "Whatever is rightly done, however humble, is noble." Sir Henry Royce.

9th September 2020, 17:50	#14
ProudRoverOwner Newbie Rover 75 Tourer Join Date: Aug 2014 Location: Crediton Posts: 10 Thanks: 0 Thanked 3 Times in 1 Post	Problem resolved OK so I eventually took the car to Exeter Road Garage in Newton Abbott. They were very helpful and understood the problem immediately it turned out to be a faulty wire in the Can bus so he cut out the faulty wire and replaced it, problem solved. Thank you everyone for trying to help but I am sorry it took me so long to find Exeter Road Garage.

20th August 2020, 02:38	#13
ProudRoverOwner Newbie Rover 75 Tourer Join Date: Aug 2014 Location: Crediton Posts: 10 Thanks: 0 Thanked 3 Times in 1 Post	Thank Simon, I realise this must be infuriating for you and I am grateful for your trouble. I finally have the information I need to start looking for the problem. "The GM6 body control unit behind the passenger glove box" and the connector co289 behind the driver kick panel. My CV joint seems to have been damaged as a result of the flood also so as soon as I can get that fixed if I have not been able to resolve the K-Bus issue I will try to get it to Exeter road garage for diagnostic specialist assistance.