Adding adaptive cruise

[Jimmy07]

@Jimmy07 - DASM / wiTECH issue assistance. Have a 2022 Limited 2500 with a new DASM. Plugged in wiTech to find the DASM module red, telling us "Could not get the part number because the ECU is unresponsive. Click the try again button to attempt to establish communication." Checked connections, tested continuity on the new hardness over to the door jamb and all appears good. Took the DASM over to my working 2022 Larime which I did earlier in this post and plugged it in. I could then see the DASM in my Larime and I could see the VIN of the Limited in the DASM so I know it has communicated with the bus at some point I would think. I have gone through all documents in the wiTech page related to the ECU comm error and found no resolve. When I return it back to the Limited truck, wiTech has it red and can't communicate. Any ideas?

If it works in one truck but not the other, it can only be three things:
No power, no ground, or no canbus communication going to the dasm.

 

[TXJosh]

That was my thought, I found it odd, however, that the new DASM has the Limited truck's VIN in it. I would think that means the truck is somehow communicating with it, no? I did a continuity test of the wire harness from the DASM connection to the door pillar connection and all had continuity. Any other thoughts on how to run this down?

 

[Jimmy07]

That was my thought, I found it odd, however, that the new DASM has the Limited truck's VIN in it. I would think that means the truck is somehow communicating with it, no? I did a continuity test of the wire harness from the DASM connection to the door pillar connection and all had continuity. Any other thoughts on how to run this down?

Is P/T Chassis Net: ACC/DASM Adaptive Cruise Control/Driver Assistance Module set to Enabled in alfaobd?

 

[TXJosh]

Yes, just went back through all the settings from this thread