New member in need of some help saving a ZT-T Cdti - Page 3

James.uk · 27th October 2015, 16:22

If-- you are anywhere near Axminster, try contacting 3Disco a member on this forum, he may know someone who can help..

If you live near Weymouth, then "Redfive" may know someone who can help...

If you live near Poole - --- move!

innit...
...

MGMarc · 27th October 2015, 17:22

Dam I live near Poole

Don't really fancy taking it to an auto electrician as to be brutally honest I bet they would charge more than the car is worth just to have a look

Really need to diagnose the rear demister, climate control and central locking

Have been forwarded a couple of names of members who might be able to help

SD1too · 27th October 2015, 18:33

Quote:

Originally Posted by MGMarc

If I can't diagnose the rear demister, climate control and central locking then it may have to be broken so I can recoup money I've put into it

Marc; you have been given free help in this thread, now you will need to put in some effort yourself. You won't win many friends in an enthusiasts' club by talking about breaking up a car because you're getting frustrated at the lack of a quick solution.

Quote:

...I bet they would charge more than the car is worth just to have a look

If everyone thought like that there would be no classic cars left! "So what" if it costs you more than the low financial value of your car? It's real value exceeds the majority of the vehicles on the road, so you've got a cracking car for way below the market value of an equivalent, if there was such a thing.

I recommend that you contact club member Phil-T4 who will be only too pleased to come to your house and diagnose your faults for a lot less than you might be imagining.

Simon

MGMarc · 27th October 2015, 18:58

You're right I was being petulant, my apologies

Long day at work and my frustration of not understanding this new fangled wiring system got the better of me

MGMarc · 28th October 2015, 16:39

I have spent a little time tonight trying to diagnose the K Bus fault and I believe I've found the right connector for diagnosing but I can't get any voltage on any of the pins

The connector is located above the BCU

I am looking for dc voltage between the wires and body am I doing something wrong?

MGMarc · 28th October 2015, 16:40

Deleted as this is a traffic master and not Sat nav unit

SD1too · 28th October 2015, 17:49

Quote:

Originally Posted by MGMarc

... I believe I've found the right connector for diagnosing but I can't get any voltage on any of the pins .. The connector is located above the BCU

I'm not sure what that connector is Marc. I have, though, found something which might help you. The K-bus connection appears to be direct between the BCU and the ATC ECU (Air Temperature Control, i.e. Climate Control). Strangely it is a pink wire and not a white/red/yellow as expected. It runs from pin 18 on the BCU's 18 pin connector to pin 6 on the ATC ECU's 8 pin connector.

If you need to get to the back of the ATC ECU, Haynes has instructions (I found them useful myself when recently gaining access to my airbag ECU).

Simon

MGMarc · 28th October 2015, 17:51

I believe the connector is C0289

SD1too · 28th October 2015, 17:57

Ah, as luck would have it that is indeed a K-bus distribution "header" as MGR calls them. It appears to connect the BCU with virtually everything on the car ... except the ATC ECU!

Pin 4 is the wire which goes from that "header" to the BCU.

When testing for voltage, have you got the ignition key in at least the auxiliary position?

Simon

MGMarc · 28th October 2015, 18:00

I have tried testing with two multimeters and with the ignition switch off, accessory 1 and accessory 2. But no voltage is present on any wire

Very perplexing and I'm probably doing something wrong

But I feel I'm starting to get a grasp of this new fangled wiring 😁

What provides the 12v K Bus voltage/signal? Or is it multiple ecu's?

27th October 2015, 17:22	#22
MGMarc Avid contributor MG ZT-T Join Date: Oct 2015 Location: Dorset Posts: 135 Thanks: 6 Thanked 23 Times in 11 Posts	Dam I live near Poole Don't really fancy taking it to an auto electrician as to be brutally honest I bet they would charge more than the car is worth just to have a look Really need to diagnose the rear demister, climate control and central locking Have been forwarded a couple of names of members who might be able to help Last edited by MGMarc; 27th October 2015 at 19:00..

28th October 2015, 16:40	#26
MGMarc Avid contributor MG ZT-T Join Date: Oct 2015 Location: Dorset Posts: 135 Thanks: 6 Thanked 23 Times in 11 Posts	Deleted as this is a traffic master and not Sat nav unit Last edited by MGMarc; 28th October 2015 at 17:34..

28th October 2015, 17:57	#29
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: 20,519 Thanks: 1,587 Thanked 3,749 Times in 3,181 Posts	Ah, as luck would have it that is indeed a K-bus distribution "header" as MGR calls them. It appears to connect the BCU with virtually everything on the car ... except the ATC ECU! Pin 4 is the wire which goes from that "header" to the BCU. When testing for voltage, have you got the ignition key in at least the auxiliary position? Simon __________________ "Whatever is rightly done, however humble, is noble." Sir Henry Royce.

27th October 2015, 16:22	#21
James.uk Passed Away 2002 Pale Blue. Rover 75 CDTi Connoisseur auto. 170K miles Join Date: Dec 2008 Location: Near the M67. Posts: 14,509 Thanks: 199 Thanked 585 Times in 397 Posts	If-- you are anywhere near Axminster, try contacting 3Disco a member on this forum, he may know someone who can help.. If you live near Weymouth, then "Redfive" may know someone who can help... If you live near Poole - --- move! innit... ...

27th October 2015, 18:58	#24
MGMarc Avid contributor MG ZT-T Join Date: Oct 2015 Location: Dorset Posts: 135 Thanks: 6 Thanked 23 Times in 11 Posts	You're right I was being petulant, my apologies Long day at work and my frustration of not understanding this new fangled wiring system got the better of me

28th October 2015, 16:39	#25
MGMarc Avid contributor MG ZT-T Join Date: Oct 2015 Location: Dorset Posts: 135 Thanks: 6 Thanked 23 Times in 11 Posts	I have spent a little time tonight trying to diagnose the K Bus fault and I believe I've found the right connector for diagnosing but I can't get any voltage on any of the pins The connector is located above the BCU I am looking for dc voltage between the wires and body am I doing something wrong?

28th October 2015, 17:51	#28
MGMarc Avid contributor MG ZT-T Join Date: Oct 2015 Location: Dorset Posts: 135 Thanks: 6 Thanked 23 Times in 11 Posts	I believe the connector is C0289

28th October 2015, 18:00	#30
MGMarc Avid contributor MG ZT-T Join Date: Oct 2015 Location: Dorset Posts: 135 Thanks: 6 Thanked 23 Times in 11 Posts	I have tried testing with two multimeters and with the ignition switch off, accessory 1 and accessory 2. But no voltage is present on any wire Very perplexing and I'm probably doing something wrong But I feel I'm starting to get a grasp of this new fangled wiring 😁 What provides the 12v K Bus voltage/signal? Or is it multiple ecu's?