#tech2 scan tool

Recently there is a customer reported the problem OBD2 Port Not Communicating on Tech 2 Scanner,here is the solution for it.

 Problem:

I recently purchased a clone GM Tech2 scanner to access the diagnostics in my 2006 Hummer H2. The scanner is operational and can scan all protocols but can not link to any of them. There are no driveability issues. I performed troubleshooting by doing the following:

1.Verified that the Power Control Module (PCM) and Data Link Connector (DLC) fuses were okay.

2.Tested DLC pins 4 (chassis ground) and 5 (PCM ground). The voltage was less than 0.1 which led me to believe low resistance.

3.Performed a volt reference check on DLC pin 2 (serial data) to determine if it was 5 volts and actual voltage was between 1 and 2.

4.Tested DLC pins 4 and 16 (battery) and the voltage was 12.58.

5.Checked the purple, black, black/white and orange wires on the back of the DLC for integrity and did not find any issues with fraying or looseness.

I am not sure what to think, whether the issue is with the PCM or wiring. I am trying to locate a wiring diagram for the PCM and DLC which will give me a better understanding of the wire mapping. I know the PCM has two connectors and I probably should see if there is continuity in the purple wire (Pin 2) and its termination in one or the other connector.

 Solution:

“DLC” is the Datalink connector (the connector that pushes into the vehicle) so “DLC-2” is Data Link Connector pin 2.

“D” is the 26-Way D-Type Connector that screws into your Tech2, “D-4” is 26-Way D-Type pin 4.

So if you look at the ends of the cable connectors, the pins are numbered as per my sketch.

 So detach your TECH2’s cable and check the following:

1.DLC-2 connects to D-4

2.DLC-4 connects to both D-8 and D-9

3.DLC-5 connects to D-2

4.DLC-16 connects to both D-17 and D-18

These 4 wires are the only important ones, the rest you can ignore, in fact DLC-2 to D-4 is the key one, I suspect everything else is OK.

 Your TECH2 should have come with a 12V Power Supply that plugs-in just to the right of the 26-Way D-Type, its a standard 12V jack. If you don’t have a PSU one from a PC monitor, just check its 12V.

 Connect scope probe tip to DLC-2 and ground clip to either DLC-4 or DLC-5, set the scope to DC, 1V/Division and 200uS/Division. If you can set the scope to “free run” or “continuous” just to prove there is activity then set it to “DC Triggered” with a trigger level of around +1V to +2V. On the TECH2 select the function I mentioned before (even if your vehicle doesn’t have AS) and you should see a signal the moment you hit the key.

 If the signal looks similar to the one I posted, then its safe to assume your TECH2 is working OK.

The OBPA is used in situations where a module must be programmed without having the vehicle present. This need may arise, for example, when a dealership parts department sells a control module to a retail or aftermarket customer. To perform SPS in this scenario requires an off-board programming adapter. The adapter allows the module to be powered up and communicate with the scan tool.

NOTICE Prior to performing SPS, it is important to heed the following precaution. Ensure that the Tech 2 and the terminal are both equipped with the latest software

Off-Board Remote Programming Procedure 1. Obtain VIN of the vehicle for which the module is being programmed.

IMPORTANT: TIS supports Service Programming with the Tech 2 scan tool only.

NOTICE: Prior to performing SPS, it is important to heed the following precaution. Ensure that the Tech 2 and the terminal are both equipped with the latest software.

2.  Launch TIS. Select the Service Programming System icon on the TIS main screen (Figure 1).

3.  At the Select Diagnostic Tool and Programming Process screen (Figure 2), make the appropriate selection for your procedure:

*  Under “Select Diagnostic Tool,” select Tech 2. *  Under “Select Programming Process,” identify whether an existing module is being reprogrammed or a module is being replaced with a new one *  Under “Select ECU Location,” select Off-Board Programming Adapter. *  Select Next

4. Follow the directions on the Preparing for Communication screen (Figure 3) for connecting the control module, OBPA, and Tech 2. Be sure to use the correct connector for the control module.

5. With the connection screen still up on the PC, go to the Tech 2 and select the Service Programming “Request Information” function. Follow the Tech 2 instructions to obtain module data and security information.

6. After the Tech 2 has received data from the module, exit the “Request Info” mode and disconnect the Tech 2 from the OBPA. Power down the Tech 2.

7. Connect the Tech2 Scan Tool to the PC (Figure 4). Power up the Tech 2.

8. After the Tech 2 start-up screen appears, select Next at the PC.

9. At the PC, enter the VIN of the vehicle that will be receiving the control module. Select Next.

10. The PC will display the message “Please wait! Attaching to database.”

11. On the Supported Controllers screen (Figure 5), select the type of programming to be performed from the following categories:

* Normal – Used for updating an existing calibration or programming a new controller * VCI (Vehicle configuration index) – Used for updating an existing controller or programming a new controller for newer vehicles whose VINs are not yet in the database * Reconfigure – Used to reconfigure a vehicle for changes in tire size and axle ratios * Select Next.

12. A Calibration Selection screen will appear showing the calibration to be used (Figure 7). Make a calibration selection, if necessary. When all calibrations are selected, a green check mark will appearon each folder tab. Select Next.

13. A Summary screen will appear that summarizes the current and selected calibrations of the control module (Figure 9). Confirm your choices, then select Next.

Note:If calibrations are the same, the NAODRUI Control box appears (Figure 10) stating that the calibrations selected are already the current calibrations in the control module. Click OK.

14. A Transfer Data screen will appear (Figure 11). The PC will automatically load the calibration intothe Tech 2.

15. After the download is complete, a Program Controller screen appears (Figure 12). Follow theon-screen instructions (if any), then select Close, power down and disconnect the Tech 2 from the PC.

Note: Most GM vehicles require you to perform the crankshaft position variation relearn procedure.

NOTICE To help avoid possible controller failure, make sure all cable connections are secure.

16. Reconnect the Tech 2 to the OBPA. Enter the Tech 2 “Service Programming” function and download the calibration to the module by selecting the Program ECU function (F1). At the New Programming Data screen (Figure 13), press the Continue soft key. Follow the Tech 2 on-screen instructions,then press the Continue soft key.

17. When programming is complete, press [EXIT] on the Tech 2 from www.obd2tool.com, power off the OBPA, then power off the Tech 2

IMPORTANT Wait 30 seconds after OBPA is shut off before disconnecting the control module in order to allow the controller to reset.

This article includes all GM Tech2 scanner Vetronix  clone feedback Yes and No list, aiming to help the GM technicians who are new to GM Tech2 Scanner.

Before continuing reading, please note GM Tech II works not on truck; go for VXDIAG VCX HD for truck.

GM tech2 Vetronix to test OK

Item No. SP23-C, with Candi interface for C6, $349 (bought from Obd2tool.com)

Item No. SP23, $285 (cheapest) I have no other GM Tech from the same shop, but as I know some guys test ok too.

How to use GM tech 2?

Plug and play, no need install on computer.

tech 2 handheld scanner

Test Report:

Remind: press Ctrl+ F to search is easier.

Part 1: Feedback Yes

– Used my GM tech II to retrofit tcs and marry a non divorced cd changer.

– reads everything a genuine one does. Heck, it’s probably made in the same factory as a genuine one with a different sticker on it. Pinpoint bad air bag sensors, turned on the tpms on both our Z’s.

– It works exactly like any others I’ve used at gm dealers over the years

– $339 for a brand new tech2 with a CANDI module all the cables and adapters and case is great

-connected to my intimidator ss and everything was there

– Change one of my c5s that is canadien to US to disable the auto headlights because they don’t always open when they should and when they do work right they come on too early.

– You have to specify GM English when you order the unit. There are a lot of other cards for different languages Saab, Holden, etc

– Is now fully functional for F body, C5 and C6, It cost me a lot more than the initial $1000 that I thought was a good deal.

– Plugin to my ’08 93 Aero and play around with the typical body and key features. My primary reason for picking up the Tech II was to program a spare key. I figured ~$500+ at a dealer or ~$400 on my own would be well worth it…obviously if I received a working, defect free, unit.

– Programming a key and changing some of the standard comfort features.

– Able to get security access using an old Dell laptop from my IT guy’s graveyard.

– Programming a new key was easily as 1-2-3

– Changed my key-unlock settings to all at first press, and then lock on drive off/open on key out was a snap.

– If you had a Tech2, you could possibly talk to the dealer and have them access their TIS system to load the BCM or PCM calibration to your Tech2. Some may do it.

If you can’t do that, just buy additional TIS2000 with USB key.

– Hooked it up to test engine, ABS, transmission etc, stored DTCs, Freeze Frame, live data all the test result were displayed on the large, easy –to-read backlit screen. It helped to carry out accurate and stable diagnostic function.

– Compared with GM MDI, Tech2 scan tool covers more vehicles including OPEL, GM, SAAB, and Isuzu.

-used it on my GMC for air bag warning

-Tried it on my 2006 Silverado & worked ok.

– The tis 2000 needs windows XP, Vista, win8.1, Win 7 32 bit.

– Able to easily and completely program out the TPMS system

– I have used mine to do two crank sensor re=learns and did the brake bleed on mine for the EBCM flush and it worked fine

– I am fairly certain it works on all GM cars til 2013. I have used it on my 03 GMC full size pickup, and my sisters 07 Trailblazer !!!! (and my 99 vette of course).

-If you have a 1997-2000, the TPMS is in the firmware and cannot be programmed. With the addition of the Z06 in 2001-2004, it can be programmed.

– Bleed the ABS ok.

– Used to cycle and bleed the ABS brakes on my C6 ok

-Plugged it in to my 2011 Z06, and activated the Afterblow feature. I also cleared some old DTC codes that were in history. It works just fine and the quality feels genuine. It’s a pretty good knock off. Even came with all of the stickers from the Veltronix manufacturer. I assume they are knock off too.

– Used it to program my key fobs for my Malibu but also have 4 other Chevys

Part 2: Feedback NO

– GM tech2 scan tool would NOT work with All C5’s, if you are going to use it on a C6,, make SURE you have the CAN D modules.

– Cars only, no trucks, be advised to use Allscanner VXDIAG VCX HD heavy duty scanner.

….To be continued…

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