GM Tech II Test Report Analysis

Tech 2 self tests verify that the Tech 2 scan tool is functioning normally. The self tests evaluate all critical areas of
the Tech 2 and display pass or fail messages for each subsystem tested. Self tests isolate user error from
system hardware failures. The self tests should be performed periodically to insure that the Tech 2 is
operating properly.
The Tech 2 must meet the following requirements in order to do a self test:

• Screen display must be fully readable
• Keypad must be operational

Begin the Tech 2 self-testing program by following these steps:

1. Press [ENTER] while viewing the Tech 2 start-up screen (Figure VI-1).
2. Select F3: Tool Options from the Tech 2 Main Menu (Figure VI-2).
3. Select F3: Self Test from the Tool Options menu (

PCB DIAGNOSTIC CHART

Test	Result	Solution
RAM/ROM	0 - Pass 1 - ROM read fail 2 - RAM read fail 3 - RAM write and read do not compare.	Record type of failure. Cycle Tech 2 power (press [PWR]) and retest. If problem persists, contact Customer Support.
RS-485 loopback	Pass Fail - Loopback may not be connected.	Check loopback connection. If problem persists, contact Customer Support.
RS-232 loopback	Pass Fail - Loopback may not be connected.	Check loopback connection. If problem persists, contact Customer Support.
Keypad	Test successful Keypad failed Exiting the test before all keys are pressed results in a failed keypad test	Cycle Tech 2 power and retest. If problem persists, contact Customer Support.
PCMCIA (Tests both card slots)	Card detected Card not present Fail	Check that card is inserted properly. Cycle Tech 2 power and retest. If problem persists, contact Customer Support.
Display controller (Contrast and characters)	User determines if display is correct	If the display shows a noticeable failure during tests, contact Customer Support
Sound transducer	User determines if sound transducer is working.	If no sound is emitted by repeatedly selecting Automated Test or Sound On, contact Customer Support.
Real-time clock	Time is displayed correctly. Invalid values are displayed for date, year, hour, minute, or second.	Reset clock. Cycle Tech 2 power and retest. If time is not retained, contact Customer Support.

VCI MODULE DIAGNOSTIC CHART

Test	Result	Solution
MUX (Multiplexer)	MUX A: S5 & S14 pass/fail MUX B: S1 & S3 pass/fail	If MUX A or B fails, cycle Tech 2 power and retest. If problem persists, contact Customer Support.
VCI adapter ID (performed only during selectable VCI test)	Recognized adapter Cannot identify adapter	If adapter fails, use a different adapter to make sure that the VCI correctly identifies the adapters. Cycle Tech 2 power and retest failed adapter. If adapter fails second test, contact Customer Support.
VCI ADC (Analog to digital converter)	Channel A - pass/fail Channel B - pass/fail	If channel A or channel B fail, cycle Tech 2 and retest. If problem persists, contact Customer Support.
Cross point	Pull up - pass/fail TPU5, TPU1, and TPU0 - pass/fail (results from selectable VCI test)	If a failure occurs, cycle Tech 2 and retest. If problem persists, contact Customer Support.
SIPO (Serial In Parallel Out)	Pass/fail for each area tested	If a failure occurs, cycle Tech 2 and retest. If problem persists, contact Customer Support.
DLC (Data Link Connector)	DLC1 - DLC2 pass/fail count DLC2 - DLC1 pass/fail count	If a failure occurs, cycle Tech 2 and retest. If problem persists, contact Customer Support.
CCD (Chrysler Collision Detection)	CCD - pass/fail CCD - loopback not connected	Connect loopback and retest if loopback not connected. If test fails, disregard results. Test is not for GM vehicles (other than Saab) at this time.
GND FET (Ground Field Effect Transistor)	GND FET - pass/fail	Check loopback adapter to make sure it is connected, cycle Tech 2 retest. If problem persists, contact Customer Support.
VCI HBCC (Hosted Bus Control Chip)	HBCC - pass/fail	If HBCC chip fails, cycle Tech 2 and retest. If problem persists, contact Customer Support.
VCI DUART (Dual Universal Asynchronous Receiver Transmitter)	Channel A - pass/fail Channel B - pass/fail	If channel A or channel B fail, cycle Tech 2 and retest. If problem persists, contact Customer Support.
VCI I/O 1 - I/O 16 Test	Pass/fail messages will be displayed for each of the I/O lines (results from selectable VCI test). If test fails, was loopback installed?	Once an error has been detected on one of the I/O lines, you can test the specific line by selecting F3 or F4 tests. If the test fails continuously or intermittently, contact Customer Support.
VCI loopback	Pass/fail message for each I/O loopback test.	For any failure, make sure the loopback is connected. Use F1: Check ID to verify that the loopback is found. Cycle Tech 2 and retest. If problem persists, contact Customer Support
VCI short L & M	Open I/O 7 - pass/fail Open I/O 9 - pass/fail Hi I/O 7 - pass/fail Hi I/O 9 - pass/fail Lo I/O 7 - pass/fail Lo I/O 9 - pass/fail	For any failure, cycle Tech 2 and retest. If problem persists, contact Customer Support.
VCI J1708	Internal transceiver - pass/fail Differential - pass/fail Differential - pass/fail (results from selectable VCI test)	For any failure, cycle Tech 2 and retest. If problem persists, contact Customer Support.
VCI TPU (Time Processor Unit)	TPU0 - pass/fail TPU1 - pass/fail TPU5 - pass/fail TPU12 & TPU15 - pass/fail (or not tested if no loopback) TPU13 & TPU14 - pass/fail (or not tested if no loopback)	For any failure, cycle Tech 2 and retest. If problem persists, contact Customer Support.
VCI level shifters	MUX A 2.5 V Hi - pass/fail MUX A 2.5 V Lo - pass/fail MUX A 5.0 V Hi - pass/fail MUX A 5.0 V Lo - pass/fail (results from selectable VCI test)	For any failure, cycle Tech 2 and retest. If problem persists, contact Customer Support

POWER SOURCE: DLC CABLE
Step 1: Does vehicle support power through DLC cable connection
exclusively? (If you are not sure, consult your service manual.)
Yes: go to step 2
No: Use alternate power
Step 2: Using a digital multi-meter (DMM), verify vehicle battery voltage. Is battery fully charged?
Yes: go to step 3
No: Charge battery.
Step 3: Verify connection at vehicle DLC connector for loose or damaged
pin(s).
Did you find a problem?
Yes: Repair connector. (Consult vehicle service manual.)
No: go to step 4
Step 4: 1. Disconnect DLC cable from vehicle.

2. Power on Tech 2 using alternate power source at DLC cable

power jack connection.
Did your Tech 2 power on?
Yes: Problem with vehicle. (Consult vehicle service manual.)
No: go to step 5
Step 5: Remove DLC cable from Tech 2 and attach alternate power supply at VCI power jack connection located at bottom of Tech 2. Does Tech 2 power on?
Yes: Replace DLC cable.
No: Problem with Tech 2. Contact Customer Support.
POWER SOURCE: CIGARETTE LIGHTER POWER CABLE
Step 1: 1. Unplug cigarette lighter power cable from DLC cable.

2. Using a digital multi-meter (DMM), verify voltage output at

cigarette lighter power cable power jack.
Do you have battery voltage output?
Yes: go to step 2
No: go to step 3
Step 2: 1. Remove DLC cable from Tech 2.

2. Plug in cigarette lighter power jack to the VCI power jack

connector located at bottom of Tech 2.
Does the Tech 2 power on?
Yes: Replace DLC cable.
No: Problem with Tech 2. Contact Customer Support.
Step 3: Using a DMM, verify voltage output at battery.
Do you have battery voltage output?
Yes: go to step 4
No: Charge battery.
Step 4: Disconnect cigarette lighter power cable from vehicle and verify
voltage output at vehicle cigarette lighter socket.
Do you have battery voltage output?
Yes: go to step 5
No: Problem with vehicle. Consult vehicle service manual.
Step 5: Check fuse in cigarette lighter power cable (refer to Figure VI-23).
Does fuse need replacing?
Yes: Replace fuse.
No: Replace cigarette lighter power cable.
POWER SOURCE: BATTERY POWER CABLE
Step 1: 1. Unplug battery power cable power jack from DLC cable.

2. Using a digital multi-meter (DMM), verify voltage output at

battery power cable power jack.
Do you have battery voltage output?
Yes: go to step 2
No: go to step 3
Step 2: 1. Remove DLC cable from Tech 2.

2. Plug in battery power cable power jack to the VCI power jack

connector located at bottom of Tech 2.
Does the Tech 2 power on?
Yes: Replace DLC cable
No: Problem with Tech 2. Contact Customer Support.
Step 3: Using a DMM, verify voltage output at battery.
Do you have battery voltage output?
Yes: go to step 4
No: Charge battery
Step 4: Check fuse(s) in battery power cable (refer to Figure VI-24).
Does fuse(s) need replacing?
Yes: Replace fuse(s).
No: Replace battery power cable.
POWER SOURCE: NAO OR UNIVERSAL POWER SUPPLY
Step 1: 1. Unplug NAO (or Universal) power supply jack from DLC cable.

2. Using a digital multi-meter (DMM), verify voltage output at

power jack.
Do you have battery voltage output?
Yes: go to step 2
No: Replace NAO or Universal power supply
Step 2: 1. Remove DLC cable from Tech 2.

2. Plug in NAO (or Universal) power supply power jack to the VCI

power jack connector located at bottom of Tech 2.
Does the Tech 2 power on?
Yes: Replace DLC cable
No: Problem with Tech 2.
Contact Customer
Support.
TIS2000 CD and USB Key for GM TECH2 GM Car Model:
http://www.chinacardiags.com/wholesale/tis2000-cd-and-usb-key-for-gm-tech2-gm-and-opel-car-model-706.html

Tech 2 Adapters: What are they & How to use?

What is a Tech 2 adapter:
There are a number of adapters are available for the Tech 2 scan tool which allow connection to many different vehicles. Specific adapters are included in the Tech 2 base kit depending upon Tech 2 configuration—NAO, International, Saab, Opel, Vauxhall, etc. Adapters not included in the base kit may be purchased separately from your tool distributor
Tech 2 full kit with all adapters:

Source: http://www.chinacardiags.com/wholesale/tech2-diagnostic-scanner-for-gm-saab-opel-suzuki-isuzu-holden-with-full-package.html
Tech 2 adapters list:
All adapters available for Tech 2:
SAE 16/19 Pin Adapter:
This adapter allows DLC connection to some 1994-1995 NAO vehicles and all NAO vehicles from 1996 onward.

NAO 12/19 Pin Adapter:
This adapter allows ALDL connection to some 1994-1995 NAO vehicles and all previous 1993 and earlier vehicles equipped with 12-pin ALDL connectors.

Opel 10/19 Adapter:
This adapter allows connection for current Opel vehicles with a 10-pin connector.

Saab 10/19 Adapter:
This adapter allows connection for current Saab vehicles with a 10-pin connector.

Opel / Isuzu / Geo 3/19 Adapter:
This adapter allows connection for Opel, Isuzu, and Geo vehicles that have a 3-pin horizontal connector.

Opel / Isuzu 3/19 Adapter:
This adapter allows connection for Opel and Isuzu vehicles with a 3-pin “T” connector.

In detail... look at the chart below.

How to use Tech 2 adapters with the main unit:

1. VCI cable connector (26-pin connector)
2. Various vehicle adapters
3. DLC cable (19-pin connector end)

Tech 2 User Manual:
http://www.chinacardiags.com/wholesale/tech2-diagnostic-scanner-for-gm-saab-opel-suzuki-isuzu-holden-with-full-package.html

How to replace GM Tech2 DC-DC converter

Thread: GM Tech2 scan tool DC-DC converter replacement / No power on repair
If your thinking about a TECH 2 or have one that died like mine, this may help fix it.

https://www.facebook.com/obd2.diagnostics/videos/595347837467475/?t=0

This video goes over one possible source for a dead Tech2 scan tool that fails to power up when switched on. The video is aimed at various Chinese knock-off models of the GM Tech2 clone, but the repair would be applicable to an original OEM HP, Vetronix, or Bosch manufactured GM Tech2 as well. The repair involves replacement of the isolated DC/DC 5VDC power converter on the main logic board in either case. However, if you perform this repair on a genuine original Tech2, you will lose the ability for the unit to not restart during engine cranking due to normal vehicle battery voltage drop. The Chinese knock-offs were already missing this capability so no difference there (when you read about folks saying they fixed the unit restarting during engine cranking they just got lucky that the particular batch that the converter they bought came out of could handle dipping below 9VDC which is totally random and unpredictable). This is because the proprietary isolated DC/DC converter specified by GM is not available to the public and was custom modified to GM specifications so that it could handle as low as 7VDC input and still create isolated 5VDC output. The replacement isolated DC/DC converter parts available to the public require a minimum of 9VDC to output the same 5VDC. Sometimes you might randomly get lucky and one will go below 9VDC, but impossible to predict at purchase time. You could use a "cheap" non-isolated voltage converter replacement, but this is not recommended as it defeats the original protected isolated voltage circuit design by GM/HP.
btw. credits to DrShock

This from China OBD Diagnostic Online Supplier official blog:How to replace GM Tech2 DC-DC converter

 

(Solved) Tech II TIS2000 “cannot connect with security server”

Problem:
I’m getting my butt kicked; I have a Tech II scan tool with Saab v148.0 card in it. I have tried from Globaltis(Cracked) and TIS 2000 (Hardware key) but cannot gain security access.
Device:
I have a Tech II scan tool with Saab v148 from http://www.chinacardiags.com/wholesale/tech2-diagnostic-scanner-for-gm-saab-opel-suzuki-isuzu-holden-with-full-package.html

Error message:
Tis2000 gives me the error “cannot connect with security server”
Globaltis just says “error” when trying to gain security access.
I know it is communicating with the tech ii, because during the security check the tech goes from the home screen to “downloading”.
Laptop:
I am using a laptop with a TRENDnet TU-S9 USB to Serial Converter running XP SP3. I have java version 6 update 12 running.
Puzzle:
The only think I’ve noticed is the when starting globaltis it states “SAAB Automobile AB v146.00”. I have the 148 SAAB PCIAM card, do not know if that could be affecting it or not.
Advice/suggestion:
Very important.
Here in the forum (mhhauto.com) two types of SAAB v148.000 PCMCIA was shared
One for Tech2 hand held and one cracked for Tech2 Win
In Tech2 hand he'll only the one for its working
If its the right card uploaded in your tool card then go Security and do it
Try Java v 6.26
Its the best for GlobalTis or Java v7.0
Do you have it or not installed the SAAB v148.000 PCMCIA installed and can you connect to your SAAB car?
If not you can find this PCMCIA SAAB v148.000 for Tech2 hand held in the forum ( Not the one for Tech2win ) and use Card writer to flash you PCMCIA or MCE software
Or
use the advise of Mr. techamp (try to re-flash your Tech 2 PCIMA card with Globaltis so your hardware and software match. i believe version on globaltis is 146.00.) and use the SAAB GlobalTis to write your PCMCIA card
Then go to your card and check if the diagnostic is possible
Then connect again the Tech2 with the computer ->power it up ->run the GlobalTis-> use Security
Then you can do any SPS Programming in your car
Good luck

ABS Bleed: using Tech II or VXDIAG VCX NANO GM

Should have my Tech II clone unit something this week, and will go through it with a fine tooth comb to see that is really needed.
On tech2win, although the op is stating that its working in 64 bit mode, really want to go through it to double check if it needs to run in win 7 compatible mode for everything to work "correctly" instead.
GDS2 is run in VM mode under a XP shell so that should be trouble free, but need to check out SDS to see if it has a connection to AC delco/if it has been set up with some sort of an asian account to pull down firmware files. Here, got a feeling that you would need to get a one day subscription in order to pull down the firmware from GM, but want to see if it can still used firmware files that have been stored without needing a SDS account.
Hence if you do need an account to pull firmware files since you can't find them elsewhere, you want to pull down all the firmware file for your car and store them when you do have that one day account.
As for cycling the ABS pump with either a tech II or tech2win with the vxdiag vcx nano gm, and note that you do the procedure before you power flush/bleed, then after as well.
https://www.youtube.com/embed/XsaJ6lkWu7c
also, since the abs pump is not used much for most drivers, and you do have a tech II/ vxdiag vcx nano gm on hand, not a bad idea to run the pump about twice a year. This will cycle the stagnant fluid out of the pump, to refill it with fluid that has been recirculating; but still do a complete power brake flush around every two years still.


This from China OBD Diagnostic Online Supplier official blog:ABS Bleed: using Tech II or VXDIAG VCX NANO GM

Buy Tech 2 China clone for good quality & good price

GM Tech 2 scanner rental?

The original Tech 2 scan tool is too expensive for you? Want a Tech 2 scanner rental for use? If so, Tech 2 clone should be a good choice for you because of the flowing reasons:

- clone tech 2 for sale: $200-$350 around, much more cheaper than the genuine

- the same functions as the genuine: diagnosis, service programming system (SPS), key programming...

GM Tech 2 for sale:

Tech 2 clone problems: clone vs original?

Left -clone; right -real

Tech 2 clone problems: which tech 2 clone is the best?

There are many versions of tech 2 programmer clones from China.

GM Saab Opel Suzuki Holden Isuzu tech 2 for sale
Item No.	Weight		Card incl.	Package	Quality	Hot Selling	All Tech2 scanners come with the Same function SP23-B and SP23-B3 have the best quality; but SP23-B3 comes with a better box (carton)
SP23-B3	3.15 KG	C Card (SO22-C)		Carton Box	Best & Hottest	★★★★★
SP23-B	9.10 KG	C Card (SO22-C)		Carry Plastic Box	Best	★★★★★
SP23-C	9.10 KG	C Card (SO22-C)		Carry Plastic Box	Good	★★★★
SP23	9.10 KG	D Card (SO22-D)		Carry Plastic Box	Good	★★★
SP23-1	4.55 KG	D Card (SO22-D)		Carton Box	Best Price	★★★★★
After Sale Service: One Year!! Enough Stock Ready Ship!

Tech 2 clone problems: the best solution of GM diagnostics? 

GM MDI vs VXDIAG NANO GM vs Tech 2 scan tool

Products	GM MDI	VXDIAG VCX NANO GM	Tech 2 clone
Picture
software	GDS 2 (2011) Tech2 Win	GDS 2 (2014)	TIS2000 SPS
Need computer	Yes, it’s PC-based.	Yes, it’s PC-based.	Basic diagnostics: on-board  TIS2000: PC-based
System requirement	Package software: Win XP only v2016.11 software: Win 7	Win7 64bit / 32 bit Win8 64bit	Win XP for TIS2000
Language	Multi-Language	Multi-Language	Multi-Language (depends on vehicles)
WIFI	WIFI	YES, VXDIAG GM has WIFI version and wired version (USB connection)	No, only wired connection.
Update	Firmware updatable	Firmware updatable Software updatable	Update via 32MB Card
Activation	Yes, MDI need activation.	No need to activate	No need to activate
Diagnosis	wireless basic diagnostic	brand-specific diagnosis	basic diagnosis
Programming	-wireless online programming -offline programming ,such as European Chevrolet, Opel, but not for all cars	GM TIS2WEB online Service Programming System (SPS)	Offline programming with TIS2000 on SAAB/OPEL (-2008)
Supported protocols	UART, Class 2, KWP2000 and GMLAN (CAN)	CAN, UART, KW2000, Class2, GM LAN, etc.	CANdi interface(NOTE 1)
Supported vehicles	vehicles from 1990-2014 GM, Opel, Chevrolet, Saab, Australia Holden (2010-2012)	Vehicles to 2015 GM, OPEL	vehicles from 1992-2013 GM, SAAB, OPEL, UZUKI, ISUZU, Holden
Advantage	-can support software from original factory -support offline & online programming	-cheap but with the same function as GM MDI - WIFI and USB connection -good for new cars	-cannot plug original software card, but can support original program -easy to carry on
Conclusion	VXDDIAG VCX NANO GM wins!!!!!!!!!!!!!!

Gm tech 2 software for pc:

tech2web

tech2win

TIS2000 download