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GM Tech2 testing HVAC actuator motors


I was looking for an example like Testing GM HVAC with GM Tech2. I have an 08 CTS that has the intermittent ticking mode door actuator. After an accidental battery drain, the passenger side stopped blowing cold air although for the past few months I noticed at times it lagged behind the driver side, temp wise. The driver side had always been fine until after the battery drain. It normally starts out fine with vent temps as low as 37 deg but has begun to fade mainly when the car is started up after cabin temps are already high where it hovers around 70 deg. I plugged in the Tech 2 which I’m still fairly new to and checked the blend doors cautiously as I didn’t want to create more trouble by initiating a test that I did not fully understand.


There were no stored codes and the mode door and recirculation door appeared to have functioned normally as the values and air sound in the vents changed when they were commanded. The blend door motors however, both stayed fixed at 51 counts which I believe corresponds to the lowest temp setting of 60 deg they were set at. When I increased the console temp it also increased on the Tech 2 display but the counts did not change and the vent temps seemed to maintain the same bias with the passenger side blowing hot. The counts did not change when the temps were raised for each actuator using the Auto Scan Tool Tech 2 either.

I did not perform the “On/Off” button test that you did here because I was not sure what it would do at the time, but intend to give that a try. I have also read that there is a calibration procedure that can be performed that I need to investigate further. I believe my situation is a combination of both calibration and actuator deterioration being brought to the surface by the recent battery drain.

I appreciate the post: Testing GM HVAC with Tech2
, this is good information that is hard to come by in such a straightforward presentation.?


I recommend that you buy gm tech2 on OBD2 website. They are cheap, logistics is fast, and after-sales service is also very good. I have been using it for a year and there is no problem with the quality of the product.


The Advantage of MB SD C4/C5 and Panasonic CF-19 Toughbook


Category : MB STAR

Obd2tool has released the MB Star diagnostic SD Connect C4+ Panasonic CF-19 Toughbook bundle package recently. What’s the advantage of the package.

Here’s the top 4 advantages of the MB SD C4+ CF19 laptop bundle:
1. Solid, weatherproof, dustproof, water-proof CF19 toughbook
2. Latest 2018.09 MB Star diagnostic HDD
3. Software pre-installed. Ready to use.
4. Support HHT-WIN and offline programming
5. Promotion. 7% Off with coupon code


It is absolutely unnecessary to get a brand-new laptop for auto repair.
It’s conveniently get rubbed or destroyed when made use of it in true upkeep.
So, to get a second-hand but workable laptop will assistance SAVE A whole lot.

Together with the Panasonic CF-19’s devoted serial port, there is absolutely no problem for user…. it was plug and play… the HDD with Mercedes computer software is loaded in to the Panasonic and WIS/EPC and XENTRY/DAS has been activated with “activation keys” prior to delivery…users can use it for Mercedes-Benz diagnostics, coding or programming with MB STAR Diagnostic Tool SD connect C4, after they receive the package.

Hardware Information:
MB SD C4 Multiplexer:
500 GB Software HDD
Software version: V2018.09
Operating system: Windows 7 32-bit
Hardware Version: OS:2.3   CSD:2.11


What’s new?
2018.09 WIN7 32BIT software. Supports HHT-WIN. Perfect working Starfinder, supports EPC accessory price inquiry, supports PL72 price inquiry system.
It is compatible with Vediamo and DTS Monaco software (both not included in the HDD).

Chinese, English, Croatian, Czech, Danish, Dutch, Finish, French, German, Greek, Hungarian, Italian, Japanese, Korean, Polish, Portuguese, Romanian, Russian, Spanish, Swedish & Turkish.

Software included:
1. D-A-S / Xentry 2018.09: the automatically Diagnosis Assistance System
Concise interface and straightforward operation with IB M high-quality computer can realize the quick and accurate code reading and the whole car system testing
2. W-I-S net 2018.02: Workshop Information System
Supply the whole view of the wiring diagram in a car,component location diagram and maintenance method. What you do is to enter the chassis number, and then you will get the manufacture data, engine configuration and the car model -all in detail.
3. 2018.02: Electronic Parts Catalog
4. ST Finder: Part Location Finder options: 2008 and 2016
5. STARUTILITIES : the movement management system and self-test
6. SDMEDIA 2014
7. PL72: 2018 Mercedes software with PL72

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Panasonic CF-19
Processor: Intel(R) Core(TM)I5 CPU U540@1.2GHz
Processor Speed: 1.20 GHz
Memory Size: 4096 MB (DDR3)
Available Memory: 3893 MB (3253 MB for 32bit OS)
BIOS Information:
BIOS :  V4.00L11
Embedded Controller: V4.00L13
Intel(R) ME Firmware:
Accumulative Operating Time:18590 Hours

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Why Panasonic CF-19 is better than Dell D630/Lenovo laptops?

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The Panasonic Toughbook CF-19 is not your average convertible laptop. It’s one you can drop in the mud, drive a car over, clobber whoever is trying to steal it from you over the head with, and generally use in circumstances where most computers would give up the ghost (in the machine). Welcome to the ruggedized laptop.


Tough as nails
Incredibly versatile
Excellent connectivity
Powerful ‘laptop’ specs
Superb battery life


Low screen res and terrible viewing angles
Weighty and chunky

Key Features

Convertible laptop/tablet with swivel screen
Fully rugged: weatherproof, dustproof, drop-proof

Throughout it all the CF-19 just kept on working – no drying time, no down-time, no interruption in the workflow. It’s not like we needed confirmation that this rugged laptop is as tough as its name implies, but it’s good to see that it’s still as durable and weatherproof as ever.

If you prefer MB SD Connect C5, you can contact us to exchange C4 to C5.