Well that was a mission...
As you all know I've had a problem with my speedo for a long time and I've always thought it was a dash loom difference.
Well I changed the dash loom back to the original one that came with the van and all hell broke loose lol..
The coolant light came on and fans wouldn't work
The eml has always been on and on my goes off when I pull the screen washers and the alarm would not stop going off even when it was running.
So.
I put the new loom back in and all the faults were still there which was concerning.
Turns out the alarm isn't happy at all when the control box in the footwear isn't level and after abit of messing about I finally got that sorted and a new Gm key coded in.
Now the eml light was on and after checking both dash looms there was 3 extra wires in the new loom that didn't exist in the old one and 1 wire that was present in both looms but a different colour.
Whilst the van was running and plugged into opcom I decided to cut each wire and see what happened and if any faults appeared. Now I cut the 3 extra wires and nothing whatsoever ever changed no faults nothing.
I cut the 4th wire which is a different colour in the old loom and presto the eml goes off but no faults and nothing that I've found so far has stopped working. Happy days
I still want to try to work out what these wires are actually for but first I went onto the speedo issue.
Well after spending ages checking every wire related to speed signals and abs, it appears that the signal is getting to the abs computer and the abs computer to the instrument panel but.. the overall speed signal from the abs computer isn't working at all so I plugged the original abs computer in which I changed ages ago due to the tc and esp not working and first time the speedo works lol.
So long story short everything now works as it should but I have the same issue as I had ages ago now and that's the tc light is on and I have 3 fault codes.
C0241 requested engine torque malfunction
C0196 yaw rate sensor no signal
C0186 lateral acceleration sensor no signal.
Now 2 and 3 are there due to no yaw sensor which I'm on the hunt for but the first code I have no idea about and can't seem to find much info on it.
Has anyone had this before?