The Case for the Tech-2

[HiHoeSilver]

@Rocketman and @gooffeyguy


Might not be an option for the ’02, but here’s where I found the HVAC actuator recalibrate for my ’04.

Set up the Tech 2 with your specific vehicle info and get to this menu:

Powertrain
Body
Chassis
Diag Circuit … (can’t read the rest of my writing – LOL)


Select BODY on that menu

Select your RADIO (not sure why it has to go through this but it is what it is.) I stopped here first time through thinking it was a dead end, but gave it a try on the next pass. I have an aftermarket radio so I just picked whatever one was close to the factory one that was in it originally.

Select HVAC SYSTEM

Select BODY

Select Heat & Air

Select SPECIAL FUNCTIONS

Select HVAC ACTIVATION RECAL


I didn’t go any further than that since I don’t need a recal, but you may find yours in a similar spot on the Tech 2. YMMV. Buried, for sure.

I don't think the dash gauges can be 'swept' on my model year, at least I haven't found that yet on the Tech 2. No transmission fluid life % either.

Solid exploration.

 

[Rocket Man]

@Rocketman and @gooffeyguy


Might not be an option for the ’02, but here’s where I found the HVAC actuator recalibrate for my ’04.

Set up the Tech 2 with your specific vehicle info and get to this menu:

Powertrain
Body
Chassis
Diag Circuit … (can’t read the rest of my writing – LOL)


Select BODY on that menu

Select your RADIO (not sure why it has to go through this but it is what it is.) I stopped here first time through thinking it was a dead end, but gave it a try on the next pass. I have an aftermarket radio so I just picked whatever one was close to the factory one that was in it originally.

Select HVAC SYSTEM

Select BODY

Select Heat & Air

Select SPECIAL FUNCTIONS

Select HVAC ACTIVATION RECAL


I didn’t go any further than that since I don’t need a recal, but you may find yours in a similar spot on the Tech 2. YMMV. Buried, for sure.

I don't think the dash gauges can be 'swept' on my model year, at least I haven't found that yet on the Tech 2. No transmission fluid life % either.

Are you under diagnostics to start or service programming system? I go to diagnostics which is the only thing that takes me in, then I don’t have the option to choose radio or hyacinth, it just goes to a menu that has heating and ac. Then the special functions option is there, and then there’s 2 options- output control and setup new hvac. Utput control just has tests for everything, no calibrations. Setup new hvac just goes to *auxiliary ECC which does nothing.

 

[swathdiver]

Are you under diagnostics to start or service programming system? I go to diagnostics which is the only thing that takes me in, then I don’t have the option to choose radio or hyacinth, it just goes to a menu that has heating and ac. Then the special functions option is there, and then there’s 2 options- output control and setup new hvac. Utput control just has tests for everything, no calibrations. Setup new hvac just goes to *auxiliary ECC which does nothing.

Vehicles have different menu options. Mark, if yours doesn't have HVAC recalibration, try building your truck as a different year or call it an Escalade and see what happens.

 

[Fless]

Are you under diagnostics to start or service programming system? I go to diagnostics which is the only thing that takes me in, then I don’t have the option to choose radio or hyacinth, it just goes to a menu that has heating and ac. Then the special functions option is there, and then there’s 2 options- output control and setup new hvac. Utput control just has tests for everything, no calibrations. Setup new hvac just goes to *auxiliary ECC which does nothing.

You're in the right spot, Mark, but the HVAC recal doesn't show up in mine until I pick the 2003 year, then it's like I posted. I'm not sure if the 2003 relearn would work on your M.Y.

In the 2002 M.Y. I thought there were some other selections under HVAC to see in what position the blend door, etc. were. If you can find those you might be able to exercise the heater controls to see if the settings change. [EDIT: I just reread your last bit and you already found the settings indicators but no recal.)

 

[gooffeyguy]

I still can't even connect to see any of the Heating and AC data or special functions on my 01

2001 Yukon SLT
2012 Yukon Denali XL
2011 Yukon Denali RIP 5/20/18

 

[Doubeleive]

I still can't even connect to see any of the Heating and AC data or special functions on my 01

2001 Yukon SLT
2012 Yukon Denali XL
2011 Yukon Denali RIP 5/20/18

try choosing 2003 as the year and see if it will do it then

 

[Rocket Man]

You're in the right spot, Mark, but the HVAC recal doesn't show up in mine until I pick the 2003 year, then it's like I posted. I'm not sure if the 2003 relearn would work on your M.Y.

In the 2002 M.Y. I thought there were some other selections under HVAC to see in what position the blend door, etc. were. If you can find those you might be able to exercise the heater controls to see if the settings change. [EDIT: I just reread your last bit and you already found the settings indicators but no recal.)

I can command the doors etc, just no calibration. I do know that a lot of the electronics changed after 2002. I’m not going to worry about it. I’ve used the method of disconnecting the battery and it worked.

 

[HiHoeSilver]

I can command the doors etc, just no calibration. I do know that a lot of the electronics changed after 2002. I’m not going to worry about it. I’ve used the method of disconnecting the battery and it worked.

Maybe that's the key? Pre 03, use the old school methods, 03+ use the tool?

 

[Fless]

I still can't even connect to see any of the Heating and AC data or special functions on my 01

Is your Tech 2 software 33.004?

 

[Rocket Man]

Maybe that's the key? Pre 03, use the old school methods, 03+ use the tool?

Probably.

 

[gooffeyguy]

I've tried using different years and it still has connection error when trying to view the HVAC.

Using newest 33.004 software


2001 Yukon SLT
2012 Yukon Denali XL
2011 Yukon Denali RIP 5/20/18

 

[Doubeleive]

I've tried using different years and it still has connection error when trying to view the HVAC.

Using newest 33.004 software


2001 Yukon SLT
2012 Yukon Denali XL
2011 Yukon Denali RIP 5/20/18

it might be worth spending the $20-30 to get the service manual off ebay and see what procedure it uses

 

[Rocket Man]

Vehicles have different menu options. Mark, if yours doesn't have HVAC recalibration, try building your truck as a different year or call it an Escalade and see what happens.

You're in the right spot, Mark, but the HVAC recal doesn't show up in mine until I pick the 2003 year, then it's like I posted. I'm not sure if the 2003 relearn would work on your M.Y.

In the 2002 M.Y. I thought there were some other selections under HVAC to see in what position the blend door, etc. were. If you can find those you might be able to exercise the heater controls to see if the settings change. [EDIT: I just reread your last bit and you already found the settings indicators but no recal.)

Maybe that's the key? Pre 03, use the old school methods, 03+ use the tool?

So I looked up the procedures at alldatadiy and it shows exactly what I'm seeing. I can test the different parts of the system but the calibration for all the actuators is done by simply removing the power from the syatem, waiting 30 seconds, and reconnecting it.

Quote:
"Programming and Relearning

The HVAC control module will relearn the actuator limits whenever power is disconnected and re-connected to the module.

Use the following steps to perform the calibration update:

1. Turn OFF the ignition.
2. Remove the battery positive voltage circuit fuse of the HVAC Control Module.

IMPORTANT:

• The scan tool must be disconnected from the vehicle to properly perform the calibration procedure. If a scan tool is connected before this procedure is completed, then new calibration values will not be stored.
• Failure to wait 60 seconds will not allow the HVAC control module sufficient time to clear the old calibration values.

1. Wait 60 seconds .
2. Install the fuse.
3. Turn ON the ignition.
4. Wait 60 seconds before installing a scan tool."

 

[gooffeyguy]

it might be worth spending the $20-30 to get the service manual off ebay and see what procedure it uses

Yeah I've ordered one

2001 Yukon SLT
2012 Yukon Denali XL
2011 Yukon Denali RIP 5/20/18

 

[avalonandl]

So my Tech 2 just arrived. Will take it up north next week and study. Also have the Arnott Compressor to install for rear Air shocks.

 

[gooffeyguy]

So I've heard that the spare tire has a TPMS sensor valve in it. How do we view this or turn it on? Is it like adding the afterblow feature to the HVAC module, where you have to go into the setup and add the feature?

 

[swathdiver]

So my Tech 2 just arrived. Will take it up north next week and study. Also have the Arnott Compressor to install for rear Air shocks.

If someone else is driving for a time, plug it in and have a look around while the truck is running.

So I've heard that the spare tire has a TPMS sensor valve in it. How do we view this or turn it on? Is it like adding the afterblow feature to the HVAC module, where you have to go into the setup and add the feature?

Not heard of this before, there are only 4 positions to learn for TPMS on our generation.

 

[gooffeyguy]

Not heard of this before, there are only 4 positions to learn for TPMS on our generation.

Yeah, I guess I remembered wrong. I think what I read about was when running a spare tire that has a tpms in it if anything special needed to be done. I think in that forum it was brought up that it would be nice if you could monitor the spare tire pressure also.

 

[avalonandl]

Driving by myself.

 

[DougAMiller]

So I've heard that the spare tire has a TPMS sensor valve in it. How do we view this or turn it on? Is it like adding the afterblow feature to the HVAC module, where you have to go into the setup and add the feature?

My Tech2 shows an option for the spare on the TPMS menu, and it was active on mine. However, if the spare has a sensor, it is different from the type on the other 4 wheels, as it doesn't have the threaded valve stem. When I read the tire pressures with the Tech2, it shows a pressure for the spare, but it stays at 46psi and never changes. I've checked the pressure in my spare with a tire gauge and it is 34psi, so I'm not sure where the TPMS system is getting that reading from. Also, the Tech2 displays the serial number of each sensor and the spare tire sensor has fewer digits than the others, so that would seem to indicate that there is a sensor, but it is a different type. I've seen no way to make this display on the DIC, but I have the Torque app configured to display the TPMS for all 4 wheels and had the spare on the display for a while, but since it never changed with temperature like the others and didn't agree with my tire gauge I finally removed it from the display.

Also not sure how to learn the spare TPMS sensor, as a fifth wheel isn't allowed with the normal learn procedure and I don't recall seeing a way to learn it with the Tech2. Maybe that's why the serial number is different, so it doesn't have to be learned.