Help with Alfa regarding LIN BUS

[brental1]

I have a 2022 BH with Level 1 EQ. Last year, I swapped in Heat/Vent Front Seats and Heated Steering Wheel. They didn't require programming to get the hard buttons to work. I have now programmed them with Alfa and the soft buttons now appear on the display.

I just swapped in Heat/Vent Rear seats. I programmed several changes with Alfa and the Right switch (both heat and vent) work. However, the Left switch does nothing. I'm trying to diagnose the Left Switch with Alfa. How/can I do this?

The dropdowns for all the LIN options show 22 options; but none of them seem to be heat/vent switches. Unless I don't understand some of the acronyms.

When I choose Display LIN Part Numbers and Serial Numbers, I get "Failed for Undefined Reason".

I'm afraid to Reset LIN ECU.

Appreciate any input. Brent

 

[Jimmy07]

Alfaobd can’t diagnose a switch issue on Lin bus. Sounds like it’s most likely a wiring issue.
Both rear switches have the same connectors with the same circuits in the same positions. Unplug them both and check continuity on the circuits in the connectors (ie.- probe position 1 on the right switch connector with position 1 on the left switch connector, and so on).

 

[brental1]

Alfaobd can’t diagnose a switch issue on Lin bus. Sounds like it’s most likely a wiring issue.
Both rear switches have the same connectors with the same circuits in the same positions. Unplug them both and check continuity on the circuits in the connectors (ie.- probe position 1 on the right switch connector with position 1 on the left switch connector, and so on).

Thanks. I got around 12V on both the Fused B+ and LIN BUS on both connectors; with respect to each connector's ground--so it seems all 3 pins on both connectors are OK. I even verified the pinning on the Right connector just in case it was made wrong.

I couldn't swap the switches because of the keying. But, I just repinned the connectors and the bad switch doesn't work on the "good" side. So, it must be a bad switch. Both switches were brand new last year!