Hi Everyone, I’m really struggling with a rear hvac issue. The issue is that is only blows hot in rear . I’ve scanned it with a tech 2 and get code B0433. It shows symptom byte 5 and 4. I’ve cleared it and it has also shown symptom byte 2. Below is all of the thing I have tried with no luck.
Clearing the code and relearn
Replaced the actuators with OEM parts.
Swapped the actuators to verify that this is not the issue.
Checked blend door function.
On the tech 2 I can get the front hvac actuators to move in both directions, but the rear hvac actuators will not move all the way to cold or hot / floor or ceiling when I issue that command.
I’m leaning towards wiring or the hvac module.
Can anyone point me in the right direction. I can test the wiring for 12v and ground but don’t know how to test for the 5v signal. I have no ideas how to test the hvac module itself.
Thanks
David
