Page 1 of 1
VT standalone harness
Posted: Mon Aug 01, 2022 4:41 pm
by gm-services
Dumb question , when transplanting VT ecu and harness (L67 & 4L60E) I have no comms with scantool
I have had this problem before with VT transplants , for some reason VS ecu transplants seem to be fine.
Is there a trick to get scantool comms (Tech2) with the VT without the other modules (I believe the BCM is the Bus master)
TIA
Brad Roberts
Just Commodores Limited
1033 Links Road
Waiohiki RD3
Napier
NZ
Re: VT standalone harness
Posted: Mon Aug 01, 2022 9:34 pm
by charlay86
I guess the scan tool is listening for the bus master heartbeat message, which won't be there. It may be possible to get the VT pcm to spit out the BCM heartbeat message periodically, but this isn't how it's usually configured.
Re: VT standalone harness
Posted: Tue Aug 02, 2022 1:17 pm
by Dylan
In VT the BCM is the master. There's two flags to set for a stand alone set up. I can't remember off hand sorry.
When I do the V8 harnesses I write a VS3 calibration to the memcal. It solved a lot of issues. Maybe you could do the same with the V6
Re: VT standalone harness
Posted: Wed Aug 10, 2022 12:57 pm
by gm-services
Thanks for reply.
I will have a look in Tunerpro and see if I can see the flags for it.
It's actually A VQ ute with a VT L67 engine/trans/loom/computer ,so a VS III won't help I guess
Cheers
Brad
Re: VT standalone harness
Posted: Wed Aug 10, 2022 10:00 pm
by Dylan
VS3 and VT us same ECU and memcal, just a different code in the EPROM. A much simpler code for pre VT vehicles.duebthe the VT having majority of the data sent ronthw dash as data and not hardwired. VS3 was still all wired.