Thanks for the updates. After revisiting the 01-Engine coding I'm reasonably confident 01114012232401080000 is correct but I wonder if that's rejected due to the climate/HVAC nature of that Byte combined with the fact that an actual 08-Auto HVAC communication issue exists. For example, that's very close to the AUX heat bit we were trying to turn off. Temp screen shot here:
Getting 08 back online is probably best but you may want to try coding 01-Engine in 2 steps:
1) 01114010232401080000
If accepted:
2) 01114012232401080000
The 2-step song and dance is firstly telling it there is no HVAC or AUX heat followed by configuring it to the value we want.
I'm not sure what to suggest next in regards to the communication issues but I would be tempted to remove/unplug both 08-Auto HVAC and 15-Airbags at this point to see if that improves the 04 status at all. If there is no improvement with 04 when 08, 15 and the 56 units are unplugged -and- there aren't any obvious wiring issues it may be worth checking to see if someone swapped it with the wrong part number. In that case, PL24 thinks this VIN uses 6Q0 959 654 D:
Getting 08 back online is probably best but you may want to try coding 01-Engine in 2 steps:
1) 01114010232401080000
If accepted:
2) 01114012232401080000
The 2-step song and dance is firstly telling it there is no HVAC or AUX heat followed by configuring it to the value we want.
I'm not sure what to suggest next in regards to the communication issues but I would be tempted to remove/unplug both 08-Auto HVAC and 15-Airbags at this point to see if that improves the 04 status at all. If there is no improvement with 04 when 08, 15 and the 56 units are unplugged -and- there aren't any obvious wiring issues it may be worth checking to see if someone swapped it with the wrong part number. In that case, PL24 thinks this VIN uses 6Q0 959 654 D: