I have swapped the
BCM and the problem is still there
Thinking might be the HIM as it has input hs can to pcm and hs can to cluster
The odd thing is I can't always connect to the network (ecu) thru obd port ,says is connected to dongle but not ecu.
The other thing when I can connect with forscan it sometimes cant /
doesn't recognise the pcm,him,abs modules while other times it does.
I can on forscan dashboard also pick up speed and tach via pcm but have no signal via cluster for speed and not even a gauge option for rpm via instrument cluster.
I know that the mechanical connection of the hscan is ok as the water temp , oil temp and boost works on thethey are also transmitted via hs can like the speed and rpm .
So is got me to a point where it might be EPROM issue also
Last time I replaced the cluster and had it reprogrammed to the car the speed and rpm worked till I disconnected the battery to do some work on the car and when reconnected th gauges weren't working again.
Recently I took It down to my tuners to get ghost cams done via pcm tech( dash not working) but the tuner could not write to the ecu and told me to check pin 13 on obd port . When I picked up the car the speed and tach worked. I got home and checked the connection by unplugging plugs and it turns out connection from pcm to pin 13 is ok
But when I put it all back together it stopped working again .
Not sure if it's an eeprom problem but this is past my diagnostic experience.