K-bus problem

dauphin · 25th July 2018, 18:48

I raised this issue the other day on the thread about making a loom to install electric seats, so I apologise to those who have read about it before, but I thought I might get more response via a separate thread.

Since completing the job (successfully to the extent that the seats are working) I’ve had the classic symptoms of a K-bus fault - no indicator or main beam tell-tale, aircon “Er” reading, etc.

In the course of the installation I made a spliced connection into a K-bus wire behind the centre console behind the radio, so my first attempt to resolve the issue was by removing this connection at the splice point - but the fault remains. I’ve also tried removing the radio and the cd magazine as well as the new power feeds to the seats.

As I think I’ve isolated nearly all the new seat wiring, I seem to be left with two main possibilities. One is I might have somehow upset the K-bus wiring somewhere other than at the splice (which I’m certainly not aware of and can’t see any likely wires adrift or damaged) . The other thought I had is that I replaced the driver’s door at the same time as I was working on the seat wiring, whilst waiting for some electrical parts to arrive, so is there any K-bus wiring to the door which might be responsible, eg at the connector inside the A-pillar, or at the central locking actuator?

T-Cut · 25th July 2018, 19:28

Doesn't an addition like that need T4 'activation'?

TC

klarzy · 25th July 2018, 19:37

Quote:

Originally Posted by T-Cut

Doesn't an addition like that need T4 'activation'?

TC

not necessarily to work (unless you want the key coded positions in memory function), but mine also played up ( no external indicators) until I did a battery reset... then it was fine...

my tip is if you add or subtract memory seats then do it with the battery off...

dauphin · 25th July 2018, 20:06

Quote:

Originally Posted by klarzy

not necessarily to work (unless you want the key coded positions in memory function), but mine also played up ( no external indicators) until I did a battery reset... then it was fine...

my tip is if you add or subtract memory seats then do it with the battery off...

The battery was disconnected throughout - and I reset it again over a 2 hour period this afternoon

25th July 2018, 18:48	#1
dauphin Regular poster Rover 75 Tourer Join Date: Mar 2018 Location: Helensburgh Posts: 45 Thanks: 6 Thanked 11 Times in 8 Posts	K-bus problem I raised this issue the other day on the thread about making a loom to install electric seats, so I apologise to those who have read about it before, but I thought I might get more response via a separate thread. Since completing the job (successfully to the extent that the seats are working) I’ve had the classic symptoms of a K-bus fault - no indicator or main beam tell-tale, aircon “Er” reading, etc. In the course of the installation I made a spliced connection into a K-bus wire behind the centre console behind the radio, so my first attempt to resolve the issue was by removing this connection at the splice point - but the fault remains. I’ve also tried removing the radio and the cd magazine as well as the new power feeds to the seats. As I think I’ve isolated nearly all the new seat wiring, I seem to be left with two main possibilities. One is I might have somehow upset the K-bus wiring somewhere other than at the splice (which I’m certainly not aware of and can’t see any likely wires adrift or damaged) . The other thought I had is that I replaced the driver’s door at the same time as I was working on the seat wiring, whilst waiting for some electrical parts to arrive, so is there any K-bus wiring to the door which might be responsible, eg at the connector inside the A-pillar, or at the central locking actuator?

25th July 2018, 19:28	#2
T-Cut This is my second home Rover75 and Mreg Corsa. Join Date: Nov 2006 Location: Sumweer onat mote o'dust (Sagin) Posts: 21,752 Thanks: 341 Thanked 3,660 Times in 2,924 Posts	Doesn't an addition like that need T4 'activation'? TC