Blend doors calibration instructions please?

From the book -
Do not adjust any controls on the HVAC control module while the HVAC control module is self-calibrating. If interrupted, improper HVAC performance will result.

Clear all DTCs.
Place the ignition switch to the OFF position.
Install the HVAC actuator.
Connect all previously disconnected components.
Remove the HVAC control module fuse for a minimum of 10 s.
Install the HVAC control module fuse.
Start the vehicle.
Wait 40 s for the HVAC control module to self-calibrate.
Operate system and verify that no DTCs have set as current DTCs.

Good evening.

Here is how you can recalibrate the blend door actuators

RE-CALIBRATING ACTUATORS

When replacing the HVAC control module it will be necessary to allow the HVAC control module to perform a calibration process. When installing the HVAC control module be sure to perform the following:

IMPORTANT: Do not adjust any controls on the HVAC control module while the HVAC control module is self-calibrating. If interrupted, improper HVAC performance will result.

1. Place the ignition switch to the OFF position.
2. Disconnect the scan tool.
3. Install the HVAC control module.
4. Connect all previously disconnected components.
5. Start the vehicle.
6. Wait 40 seconds for the HVAC control module to self-calibrate.
7. Verify that no DTCs have set as current DTCs.

When replacing the HVAC actuator it will be necessary to allow the HVAC control module to perform a calibration process. When installing the HVAC
actuator be sure to perform one of the following:

IMPORTANT: Do not adjust any controls on the HVAC control module while the HVAC control module is self-calibrating. If interrupted, improper HVAC performance will result.

Preferred Method (w/ Scan Tool)
1. Clear all DTCs.
2. Place the ignition switch in the OFF position.
3. Install the HVAC actuator.
4. Connect all previously disconnected components.
5. Start the vehicle.
6. With the scan tool, initiate the Motor Re-calibration feature of the Heating and Air Conditioning Special Functions menu.
7. Verify that no DTCs have set as current DTCs.

IMPORTANT: Do not adjust any controls on the HVAC control module while the HVAC control module is self-calibrating. If interrupted, improper HVAC performance will result.

Alternate Method (w/o Scan Tool)
1. Clear all DTCs.
2. Place the ignition switch to the OFF position.
3. Install the HVAC actuator.
4. Connect all previously disconnected components.
5. Remove the HVAC/ECAS fuse for a minimum of 10 seconds.
6. Install the HVAC/ECAS fuse.
7. Start the vehicle.
8. Wait 40 seconds for the HVAC control module to self-calibrate.
9. Verify that no DTCs have set as current DTCs.

This guide can help as well

https://www.2carpros.com/articles/replace-blend-door-motor

Roy

Might be air in system check for full coolant level. It may also be a an actuator not fully open. Try pulling hvac fuse for 60 seconds then reinstalling that resets actuators but you wouldn't know until next time you fired truck up

Good afternoon,

After replacing with a new actuator, you remove the HVAC1 fuse for 2 minutes. Then turn on the key and install the fuse. Leave it for 3 minutes. That is the procedure for calibration.

Did you replace the actuator? This guide can help

https://www.2carpros.com/articles/replace-blend-door-motor

Check out the diagrams (Below). Please let us know what happens.

Okay, it is not the actuator. You will need to test for power to the actuator to be sure it is getting a signal from the control head.

With the key on, you need to test for 12 volts at the actuator motor. The color is on the diagram I attached.

Start there.

Roy

Okay, you have a low battery in the truck.

Is that with the actuator hooked up or disconnected?

Roy

Only one of the wires should have power, not both.

I would suspect the control head is not working correctly or the wiring is shorted together between the actuator and the control head.

Roy

Then how did you come up with voltage on both pins?

No, that is good. The fact you have system voltage tells me there is no short.

It looks like the control head.

Roy

You are welcome.

Always glad to help.

Roy