GM TECH 2 Diagnostic tool – A quick word before buying on obd2tool

The Tech 2 Scan Tool has been around since the 1980’s.  It has been the flagship diagnostic tool and programing device for many many years.  it continues to be a valuable part of the GM dealership stable because its quick, efficient, and works great!  Now that other diagnostic programs that are, for the most part, only economically  viable for GM dealership technicians to use (like Tech2WIN) the cost of Tech 2 has come down a little bit over years past.  It is because the Tech 2 has been around for as long as it has that it is such a copied and cloned unit.  Couple this to the advent of obd2tool, allowing rip-off artists world wide to sell cloned duplicates, the glut of good people who want to work on their own cars and want a dealership level tool, and technicians who want to upgrade beyond a piece of crap generic scan tool for GM family cars, and what you are left with is a global marketplace where 95% of the stuff being sold here is a clone, or simply someone else’s headache!

All Tech 2’s are not considered equal. Tech 2 gives you unprecedented access to EVERY GM module and controller, provides the best and highest volume of vehicle data, and possesses the most bi-directional functionality of any diagnostic tool for GM family cars. There have been, however, a multitude of manufactures of Tech 2 over the almost 30 years it has been in production.  Very early Vetronix units had solder joint problems which caused random communication failures.  In addition to being an inconvenience, if this occurs during a programing event, you will be left with a garbage controller!  Later models are made by Bosch, who bought Vetronix.  They have cheapened the unit up so much that it is marginally better than a Korean clone.  As a matter of fact, most of the electronics are made in Asia or in Eastern Europe where most of the clones come from. This was done as a cost cutting measure.  The result is a slew of premature failures!  The units that reside in the “middle” time were made and marketed by others like Hewlett Packard and OTC.  These were the most reliable and durable units around.

Tech 2 is not only a diagnostic tool, it is also is capable of programing new and used programmable GM controllers, configuring functionality within modules and updating GM family cars with the most current programing.  You can gain access to programing on GM TIS on WEB website.  With very little effort, and cables that accommodate your type of PC, you can update or install programing in any GM family OBD II or CAN compatible vehicle.  Tech 2 can also be used on SAAB, Holden, Isuzu, even some Toyota vehicles with optional programing available through GM and accessible by anyone for weekly, monthly, or yearly subscription.

A new Tech 2 unit retails for well over $4000.00.  Anyone who tries to sell you a new unit for less is selling you a clone that DOES NOT work on every GM car, IS NOT of any quality and has a high failure rate.  Clone Tech 2’s frequently destroy vehicle control modules, and are a complete and total waste of money!  A lot of people buy a Chinese or Korean clone, and have no idea they have a clone!  If they sell it to you, they didn’t know it was a Chinese or Korean clone.  This is a highly cloned tool and even the original manufacturer(s) built some low quality units.  Make sure of what your buying BEFORE YOU SPEND YOUR HARD EARNED MONEY ON IT. Clone scan tools are very easy to spot if you know exactly what your looking for!  On Tech 2, there are tell-tale signs of a tool being a clone.  Clone units DO NOT print on the unit that it is a clone.  Clone units DO NOT say “made in china” or “made in Korea” or “made in Poland” on them,  They say “Made in the United States.”  The idea is that THEY ARE CLONES and thus are lying to make you think your getting an authentic unit, when instead, your getting a huge piece of crap that is, literally, worth pennies!  There are hundreds of these clones out here on obd2tool being sold by people all over the world.  There are private individuals who buy clones, either discover they have a clone and re-sell it as authentic, or have no idea its a clone and think its authentic.  They have no idea because they bought it, think they couldn’t figure out how to use it (when in reality, it didn’t work) and just re-sell it as authentic.  Either way, intentionally or nu-intentionality, you get stuck with it, and you may or may not know it until it burns out or destroys your cars computer costing you hundreds or thousands of dollars and untold hours and days of misery, just to save a few bucks!

To use a Tech 2 scan tool in this day and age, 90% of all software packages GM offers require a minimum 32 MB memory card.  A 10 MB card, although very useful for backup, data logging and flash programing, is useless for diagnostic programing for North American Operations (NAO), Saab, Isuzu, Suzuki and pretty much any of the other available software packages Tech 2 offers.

If you think that, just because your using a Tech 2 for your personal use, you can buy a cheaper import unit, think again!  I see HUNDREDS of these units thrown on the scrap heap every year.  They cannot be repaired and are non-serviceable.  Not all of these units will accept GM programing, thus cannot be updated.  They are of grossly inferior quality and have an extraordinary failure rate, and damage more cars than I can express to you.
A couple ways to spot a clone:

If the Professional Diagnostic Tool Tech 2 your looking at has no production date on the inside cover for the software card on the top of the scan tool, its a clone.  If there is no date, your looking at a clone!
If the “VOID” warranty sticker is opaque in appearance and difficult to read, its a clone.
If the Tech 2 has little white stickers over the case half’s on each side with the word “VETRONIX” and Chinese symbols denoting a date, its a clone.
Most clones are being sold from Asian or European countries.  Why would anyone be selling an item that was built here, shipped over there, and than put up for sale over there, to ship back here?
Finally, there are PLENTY of people here in the United States selling clones!  They buy a few hundred of them, and un-load them on unsuspecting people calling them “slightly used” or surplus.  If they have very little feedback, or the feedback looks like it was written by a a foreigner, your likely looking at a clone.

90% of the units on obd2tool are being sold by people who are intentionally selling you garbage, import clone units. They don’t print that they ARE clones, but they don’t print that they are NOT clones!  As long as their are ignorant people who are led only by the concept of saving a few pennies, there will always be clone items out here looking for an idiot to mate up with.  Of the other 10%, half of them are selling you a clone are have no idea they are selling you a clone because they have no idea what they have or they are un-loading an early or late domestically built model that they are trying to get off of because it has damaged their car or doesn’t work right most of the time.  Of that last 5% half of them are intentionally trying to rip you off!  You do the math!  Of one hundred Tech 2’s posted on obd2tool, both new and used, maybe 3 to 5 are the genuine article and are high in quality.
If your going to buy something for thousands of dollars, buy it from someone who has the answers, knows the product and has priced it properly.  Please use my experience to educate yourself on what your buying before you go shopping for it, and form your own opinions.  Take advantage of this information to get what you want and get it for a good price.

No matter what you decide to do, thank you for looking in and I hope this information helps you get what you want.

CGDI BMW program FEM BDC successfully with 8-Foot Chip Adapter

This is my working desk, you can see one 8–Foot Chip Adapter is plugged to CGDI BMW which is plugged to a computer, also CGDI BMW is connected to a BMW FEM /BDC test Platform which is connected to FEM /BDC immobilizer module.

CGDI-BMW-program-FEM-BDC-1

Generally speaking, I need:

One 8-Foot Chip Adapter

One CGDI BMW

One BMW FEM /BDC test Platform (used to test if FEM/BDC immobilizer system is good or bad)

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One blank key

Since this tool is easy to use, what you need to do is read the on-screen message and follow it to do. so I didn’t take many photos here, but only two ones here.

Image 1: all are fine.

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Image 2: Read out password, ISN, Key Sync Code, DME ISN.
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How to use CG-PRO to program Jaguar Land rover KVM key

Post is on how to use CG Pro to program Jaguar Land rover KVM key perfectly in step by step procedure.

Part 1: Read out the data from smart computer and anti-theft computer.

Remove the smart computer and the IMMO box from the car.

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BCM immo box

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Image 2: Smart ECU RFA

Wiring according to the wiring diagram in the software, click on “Diagram” to follow.

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BCM wiring diagram in the CG Pro software.

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BCM physical wiring

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Land Rover RFA 2m53J 9S12XET256 wiring diagram in the CG Pro 9S12 software.

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Land Rover RFA smart ECU physical wiring:

You need not connect the CLK line first, if you are prompted to decrypt when reading, then connect the CLK line according to the software wiring diagram.

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Choose BCM or RFA module, read and save the data.

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Note: Do not unplug the wiring immediately after the data is read out successfully, later you will write key and then rewrite data.

Part 2: Load the data into CG Pro software to program key

Click on “Key” – ” Jaguar / Land Rover” – Model [KVM – XEP100 (BCM) for example], then click on “Key Function” to enter the key programming menu incl. load KVM DFLASH, load KVM EEPROM, Load BCM DFLASH, Read key, Write key etc.

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Menu options:

Step 1: Load KVM DFLASH

Step 2: Load KVM EEPROM

This function is for emergency start (optional option). If you need to operate this option, please read out BCM immo data and meanwhile tick on this option when key is programming, then load BCM data.

Step 3: Place a blank key into the CG Pro Key Programmer, click on “Read key” button.

***Can read key ID and check if the key is placed correctly.

Step 4: Select key position and then click on “Write key” button.

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Please save the data in the order of DFLASH,EEPROM,BCM.

Part 3: Rewrite the data generated after key programming.

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1.Back to the main menu where you read out the data just now.

2.Open the corresponding data saved after the key is wrote.

3.Write data after connecting the computer.

Done!

Now, you can unplug the cables from the computer and CG Pro, then reinstall the KVM module back to the car.And for more CGDI Programmer,you can check here:CGDI Programmer

How to Use OBDSTAR X300M Adjust Mileage for Hyundai I20 Elite 2017

This article show a OBDSTAR X300M odometer correction testing on Hyundai I20 Elite 2017.

OBDSTAR X300M Test on Hyundai I20 Elite 2017 Odometer Correction

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Procedures:

This case was testing on the bench,connect Mileage Correction Tool OBDSTAR x300M programmer to vehicle

Power on and enter the menu to select “Vehicle”

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CLUSTER CALIBRATE

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Scroll down to select “HYUNDAI”

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HYUNDAI V30.70

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Wait for system Loading and initializing…

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Select I20 Elite

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Kilometer

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OBDSTAR X300M screen will show the current mileage information:46948 kilometer

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Please input the mileage of the adjustment:014500

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Press ENTER to continue

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Then Hyundai I20 Elite instrument cluster will restart,and it will show the new milage value you enter just now.

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Mileage adjustment complete

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MB Star C4 Xentry Mercedes Software HHTwin User Manual

HHTwin software is one parts of Star Diagnosis MB Star C4 Xentry Mercedes software.Many clients wanna know what is HHtwin software and which Mercedes vehicle & module HHTWIN supports? Bellow,OBD2tool.com share you the user manual of Xentry Mercedes HHTwin software.

All MB from late 80’s to 99 = HHT-WIN
All MB from 2001 to 2009 = DAS
All MB from 2010+ = Xentry

The year 2000 is a weird transition period — some MB made in 1999 but the model year is 2000 will be diagnosed from the 38-pin under the hood and thus use HHTwin. Other MB made in early 2000 and sold as a 2000 model will have the OBD port and the SDS will require the OBD cable to diagnosis….and will use DAS.

And then there are orphan cars, like some SLK models — some 2000-2001 SLK require the 38-pin.

I’ve even seen a 2000 E320 that had both 38-pin and OBD port — I could use either port to conduct a full diagnosis. That was funny.

Star Diagnoses HHTWIN supports modules on Mercedes vehicles:

HHTWIN should be able to read all Modules.
Having said that, for Model Years 1990 – 12/1993, the Roadster Soft Top Module has 30 possible fault codes associated with it.
Whereas for Model Years 1/1994 – 1996, the Roadster Soft Top Module has only 11 possible fault codes associated with it.

IMPORTANT: HHTWIN is updated to 2018.12 xentry mercedes software disk. Software released in 2017 and 2018 doesn’t come with HTTWIN. But now, it comes again!
MB-Star-C4-Xentry-Mercedes-Software-HHTwin

How to Install Xentry Mercedes Software HHTWIN on Windows 7 32 bit:

Disable UAC settings to “Never notify” -> Restart system if needed. It`s better to DISABLE idiotic Windows Defender too. Then, you could return UAC settings back.

First simply run HHT.exe, it will install HHT to C:\HHT, then start Xentry.OpenShell.XDOS.HHT.C4.exe/Xentry.OpenShell.XDOS.HHT.C3.exe … that`s all.
Some systems must be restarted at the end.

The problem with “–” version was fixed.
Delete C:\HHT directory and begin from the first step.
If you will update your Xentry.OpenShell.XDOS version … just apply the patch once again.

Xentry Mercedes HHTWIN Trouble Shooting:

HHTWIN setup on Dell D630 install
Error: I got my SDS last week , initially I chose the external USB disc option but have now installed it on my recently acquired Dell 630. Everything installed well, however when I get to the point of using it and it automatically goes to use HHT(as my car is a 1993 model)it says”diagnostic connector is being initialised” however then it says”com port assigned! close other use!”

I took this to mean I had it on wrong COM port and sure enough I had it on COM 1 but have changed it to COM 2 both on the machine XP and on the virtual XP machine ( I am using the RS232 connector to the 38 pin diagnostic connector) but it said the same thing again.

Solution: go to the windows system menu in control panel and under the harware section look at the com port assignmennts and make sure the com port you designated isn’t already assigned to something else.

also, does the dell630 have a dedicated RS232 com port or are you using a usb/pcmcia/cardbus to RS232 converter.

HHTwin resets the switches:
Error: How do I reset the switches with HHTwin? Or do I need a different software? My MUX is C3 Star.

MB-Star-C4-Xentry-Mercedes-Software-HHTwin-1 MB-Star-C4-Xentry-Mercedes-Software-HHTwin-2

Solution: you can’t reset the switches. you can clear error codes, but the switch state is what it is. DAS is telling you what the switch state is. Or at least what it thinks the switch state is.

you’ll need to examine the switches and see if either they are misadjusted, not connected, or not functioning.

how to start using SD Connect C4 diagnostic tool with any PC

This is an article that demonstrates how to start using MB SD Connect C4 diagnostic tool with any PC with external HDD by using Vmware virtual machine.

If you are using SD Connect C4 in a non virtual mode (i.e. with Dell D630) than launching of DAS, shown in the second half of the video, is basically the same.

If you have not yet purchased the Auto Scanner Tool and wandering of which to buy, than I would advise that you by SC Connect with Dell D630 or D620, as they are faster and easier to use.

Here is briefly how to set up thee workstastion.
– connect the exterrnal hard disk to your laptop;
– connect the LAN cable to your laotop and your MB Star LAN socket;
– connect your MB Star to the car’s OBDII socket, you’ll hear a beep – MB Star is ready to be used;
– star your PC…

After Windows XP on your laptop is up and running, you will have to setup the VMWare software.
This software should be on the external hard disk that came with your SD Connect.
You set it uo as normal Windows software.
The setup process is straight forward.

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Range Rover TPMS Module and Autel TPMS Sensors

Background:

The car has a tire pressure monitoring system (Autel TPMS Sensors) and 5 sensors (4 wheels + spare). In October, messages about pressure testing in all tires began to appear on the dashboard with the indicator on fire, then these messages disappeared and the indicator went out. Reading errors through SDD did not give a result (no errors). The system is extremely simple 4 antennas and 1 unit (located in the rear right sidewall). Having called the antenna to break the short circuit, I found out that everything is fine with them. The block itself remained in question. After conducting a study (a series of tests to check the performance), it turned out that the unit responds to a decrease in pressure in the wheels but forgets these values. After opening the unit, he discovered that he turned green, cleaned it, put it in its place … the module’s working capacity did not return.

autel-tpms-land-rover-1

here is the TPMS module
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front
autel-tpms-land-rover-4

behind

Decided to buy a new module. Winter came to the car set new wheels with new sensors.

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Autel Universal Tire Pressure Monitoring Sensors
Searching on the Internet and buy a module 5WK4 7594 ( NNW502305 )
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replacement (new unit at the top)
Changed new module in places, diagnosed using SDD (read module, initialized new unit). When the unit was initialized, the program asked either to enter the 8-digit codes of all 5 wheels or drive for 15 minutes and then install the spare wheel instead of standing on the car. For me it seemed difficult, so I started the auto display, there are no messages, I was glad and went home. After 15 minutes of movement, a system failure message popped up, after reading the errors, found that there was no response from all 4 new AUTEL MX-sensors. It turns out the sensors are sold asleep and are programmed for a specific make model and year of the car at atmospheric pressure (if installed on the car, it should be lowered). It is necessary to find a person with a device for programming or buy a Autel MaxiTPMS pad to program by yourself.
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LF
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RF
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RR
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LR
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spare wheel

and dropping an error module TPMS went home with the confidence that I would have to plug in a computer and prescribe sensor numbers manually, since I did not want to engage in shamanism with a spare wheel. BUT … a miracle happened and the system picked up all the sensors and after 40 minutes the system did not fail. Now on the tidy does not annoy me amber flat tire icon.

Disclaimer: The tutorial was translated from Russian. You are at your risk.

How to Use CGDI MB Program Keys for Benz W212 All Key Lost

CGDI MB Programmer is one of the best Benz key programmer,it can program Benz key faster than other devices.Here OBD2TOOL want to share this CGDI MB programmer test report on all keys lost programming for Mercedes Benz W212.

Connect CGDI MB Prog to W212 OBD port,run software and select “EIS”–>”Read EIS Data”

CGDI-MB-Programming-for-Benz-W212-1

Select “Compute Password”–>”Copy key without key”,and it mean all key lost programming
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Then click “Collect Data”

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Follow the instruction to insert the simulation key into the EIS in 30 seconds…
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Now it starting collecting data,it will take a long time,please don’t disconnect the device

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After the collecting progress completing,save the file with the default name.

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It prompt “Save the file successfully.Please upload the data to calculate password”
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Now,click “Upload Data” to upload the data file you save just now

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Upload data successfully,please click the [Query Result] button to query

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Click “Query Result”

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Calculate password successfully

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Click “Copy” button to copy the password
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Select “EIS” menu,then click ”Paste” to paste key password

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Save EIS data with default file name

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Select “Generate EE”–>click “Load EIS File” to check EIS data information

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Then click “Generate Key File”

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It prompt you “The key file was generated successfully”

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Now select “Read/Write Key”

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Insert the new key into the CGDI MB automotive key programmer

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Tick “Infrared”,then click “Read Key/Chip”
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Click “Reset” button to erase key

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Click “Open/Write” button

Please Note:Smart key please choose 41 format,common key and BE key please choose 51 format!When writing the original key,please make sure that it is wiped by the Auto Key Programmer CGMB,otherwise the write will fail!

Click “OK” to continue

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Now select a unused key file
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Write success
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Now you can click “Read EIS Data” again to check the position key 2 is used,and if your key work correctly,it mean your programming is successful.

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Done!

Autel MS908S Pro Upgraded MaxiSYS Pro Diagnostic Automotive Tool, USA Version

Autel-MS908S-Pro-1

USA serial number with support, updates and warranty through Autel USA.

One of the MaxiSys series devices, the Autel MS908SP Diagnostic Platform bases on the revolutionary Android multitasking operating system, utilizes the powerful Cortex A7+A15 six-core processor, and equips with 9.7-inch LED capacitive touch screen. Supporting J2534 ECU Programming Device is capable of replacing the existing software/firmware in the Electronic Control Units (ECU), programming new ECUs and fixing software-controlled drivability issues and emission issues. MS908S Pro is an ideal tool for a truly trouble-free diagnosis of a maintenance plant by quickly, efficiently and effectively diagnosing automotive faults, managing customer data, and standardizing business processes.


*   Extraordinarily powerful Cortex A7+A15 six-core processor
*   9.7” 1024×768 LED-backlit glossy Multi-Touch capacitive display with IPS technology
*   Internal reliable 64GB On-board Memory for better performance
*   Built-in 8-megapixel rear camera with autofocus and flashlight
*   The VCI connects to the main unit wirelessly with up to 70 meters working range
*   802.11 a/b/g/n/ac Wi-Fi to access your favorite web resources
*   Unique ergonomic design with rubberized outer protection and a rugged internal housing
*   Open source Android Operating System for fast boot-up and multitasking
*   Extensive vehicle coverage for more than 80 US, Asian and European vehicle makes
*   Exceptional OE-Level system coverage for all electronic systems
*   Complete capabilities for codes, live data, active test, ECU information, adaptation, matching, etc
*   Cloud-based Data Manager saves customer and vehicle records, scanner data and technician notes
*   Built-in rechargeable lithium-polymer battery for up to 7.5 hours of continuous operation
*   Equip with J2534 ECU Programming Device for replacing the existing software/firmware in the Electronic Control Units (ECU), programming new ECUs and fixing software-controlled drivability issues and emission issues

Operating System           AndroidTM 4.4.2, KitKat
Processor           Samsung Exynos Six-core Processor (1.3GHz Quad-core ARM Cortex-A7 + 1.7GHz Dual-core ARM Cortex-A15)
Memory           2GB RAM & 64GB On-board Memory
Display           9.7 inch LED capacitive touch screen with 1024×768 resolution
Connectivity           Wi-Fi (802.11 a/b/g/n/ac)
USB: 2.0
BT v.2.1 + EDR
SD Card (Support up to 32GB)
HDMI
Camera (rear)           8.0 Megapixel, AF with Flashlight
Sensors           Gravity Accelerometer, Ambient Light Sensor (ALS)
Audio Input/Output           Microphone
Dual Speakers
3-Band 3.5 mm stereo/standard headset jack
Power and Battery           11000 mAh 3.7 V lithium-polymer battery
Charging via 12 V AC/DC power supply with the temperature between 0°C and 45°C
Input Voltage           12 V (9-24 V)
Power Consumption           6.5 W
Operating Temp.           0 to 50°C (32 to 122°F)
Storage Temp.           -20 to 60°C (-4 to 140°F)
Dimensions (WxHxD)           300 mm (11.81”) x 220 mm (8.66”) x 50 mm (1.97”)
Weight           NW: 1.42 kg (3.13 lb.) GW: 8.052 kg (17.75 lb.)
Protocols           ISO 9142-2, ISO 14230-2, ISO 15765-4, K/L-Line, Flashing Code, SAE-J1850 VPW,
SAE-J1850 PWM, CAN ISO 11898, Highspeed, Middlespeed, Lowspeed and Singlewire CAN,
GM UART, UART Echo Byte Protocol, Honda Diag-H Protocol, TP 2.0, TP 1.6, SAE J1939,
SAE J1708, Fault-Tolerant CAN

www.obd2tool.com

Tech 2 programs Hummer H2 above 2007

Tech 2 Scan Tool on Hummer H2 above 2007… Possible to do programming? what to do in that case?

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Yes!

Actually it does the programming just fine on newer than 2007 GM vehicles!

You must:

Pay for an ACDelco TDS subscription for vehicles above 2007 and you would use the CANDI module that comes with many of the Tech2’s for working with CAN bus vehicles. You can subscribe for as little as two days for $55.

https://www.acdelcotds.com/acdelco/action/subscribehome

This is ONLY needed if you want to program or update the software in a module.

ALL of the build in diagnostics and testing for vehicles up to 2013 works without the subscription or the older OBD-II scan tool TIS2000 software. You only need those for doing actual programming. The older TIS2000 software – that is what has the programming was discontinued in 2007. TIS2000 does have the actual programming for all vehicles up to 2007. After 2007 GM went to the TDS system.

You can also:

(for diagnostics and programming)

Get a newer style GM MDI or MDI 2 for diagnostics and programming. The catch with those. They have NO screen or built in software and you must pay for a subscription from from ACDelco TDS to use an MDI.

Other brand units, a very select few can do actual programming and use the pass-through method. NONE have the diagnostics that the actual Tech2 or MDI (with the subscription) will have. Check with Autel and see if they have the full diagnostics and re-calibration for the rear air suspension on a Hummer H2. Not going to happen, there is too little demand for them to hack and reverse engineer that particular bit of code in a Tech2 to figure out the diagnostics and then write programming for that for their tool.

(for programming)

For programming, you also need to have TIS2000 running on a computer or pay GM for a 24 month subscription for their TIS2WEB (Vehicle Programming) for $40 https://www.acdelcotds.com/acdelco/action/subscribehome
The computer will need a serial port for downloading the programming to the Tech2 for programming your vehicle.

How to do programming wit Tech 2:

The way programming works is you connect the Tech2 to the vehicle and tell it you want to program a module.

It interrogates all of the modules on the vehicle for the current versions and the VIN number.

You then connect it to the computer running TIS2000, GlobalTIS or TIS2WEB subscription and select programming in the computer.

It reads the Tech2 for the vehicle info and then presents you with a list of software for all of the modules and shows you which have updated software.

Recommend:

You’d better only do one module at a time which is a good bit more back and forth but safer.

The computer then loads the update to the Tech2. You take that back to the vehicle and connect it and it then programs the module.

The best, most reliable and safest method:

To use a long enough serial cable (its uses 9 pin serial adapters with an ethernet cable to make the cable longer – so you can just use a longer network cable) and do pass-through programming. In that method the process is the same but you leave the Tech2 connected to both the computer and the vehicle at the same time. Once you select programming on the Tech2 then go to the computer and you can immediately update each module right from the computer.

There is a slightly more updated version of standalone TIS2000 floating around on the web which has additional updates that has software updates for vehicles through 2009 as well. I know just using that TIS2000 both GMC truck and 2003 H2 both had a bunch of software updates available to be programmed all of which fix small issues or improve certain aspects.

One example in on the older single compressor air ride like 2003. Those would run and make small adjustments a LOT more often than needed and the software update fixed that.

On the H2 the rear air ride is also one to be very careful of for doing software updates though. For example, 2003 came with the earlier style single compressor but if it were to fail a dealership would replace it with the newer style dual pump compressor. Programming would still think its the original style and would attempt to program it and that would actually cause it to fail. TIS2000, (Global, Web, etc) will warn you about this sort of thing though so just heed all warnings and follow instructions and its fine.

The programming aspect is not needed or required to use the Tech2. The Professional Diagnostic Tool Tech2 still gives you a TON of diagnostics and tests that NO other OBD device has including things like the air ride module, detailed BCM functions, basically you can control and test every computer module in the vehicle.