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GM Tech2 Scanner VCI, Keypad, CANdi and RS232 Self Test Instructions

Manual: How to do GM Tech 2 Scanner self test step-by-step
VCI self test
Keypad self test
CANdi self test
RS-232 self test
Follow the instruction in detail…
Part 1: Tech2 VCI self test
tech2-vci-self-test-1
Insert the GM card
tech2-vci-self-test-2
Connect the adapter and ready for the self test
tech2-vci-self-test-3
Go to the main menu and select F4: Tool options
tech2-vci-self-test-4
F3: Self test
tech2-vci-self-test-5
Exit to continue
tech2-vci-self-test-6
Select the function for self test
tech2-vci-self-test-7
Here, press F2: Automated VCI
tech2-vci-self-test-8
The VCI module self test result
Passed VCI selftest.
Part 2: GM Tech II Keypad self test
gm-tech2-keypad-test-1
Go to the Tech 2 menu and select F4: Tool options
gm-tech2-keypad-test-2
Then F3: Self test
gm-tech2-keypad-test-3
Before running the Tech 2 self test:
(1) Candi cannot be connected
(2) Aldl loopback should be connected (GM3000109)
(3) Failure to follow these instructions may invalidate the self test
gm-tech2-keypad-test-4
F3: Selectable main pcb
gm-tech2-keypad-test-5
Press Keypad
gm-tech2-keypad-test-6
And press key
gm-tech2-keypad-test-7
Note: In the last image, the actual key pressed is F0 and the final result is PASS – that’s normal
When you test the keypad, press F0-F1-F2-F3-F4-F5-F6-F7-F8-F9-EXIT-ENTER-in a good order! DO NOT SKIP ANY ONE.
Part 3: Tech 2 scan tool CANDI module self test
VERY IMPORTANT: Pls make sure of the connection of the OBD adapter, OBD main cable, CANdi module, Tech 2 scan tool and the power supply — ALL should be good
The power should be connected by the OBD port for  CANdi self test.
tech2-candi-self-test-1
tech2-candi-self-test-2
tech2-candi-self-test-3
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F4: Tool options
tech2-candi-self-test-5
F7: CANdi diagnostics
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F0: POST result
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Test status
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F1: Self test
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CANdi self test result
Pass selftest
There are two test results for CANdi module.
tech2-candi-self-test-10
The one is Figure 8, and the other is Figure 10.
Part 4: GM Tech2 scanner RS232 self test
tech2-r232-self-test-1
Check the connection before R232 self test
tech2-r232-self-test-2
F4: Tool options
tech2-r232-self-test-3
F3: Self test
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Exit to continue
tech2-r232-self-test-5
F3: Selectable main PCB
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F2: Rs-232 loopback
tech2-r232-self-test-7
Rs232 test: Passed!
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