General Motors Tech2 User Guide
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Selecting “Self Test” from the CANdi Diagnostics menu initiates a complete test of the
CANdi module. When testing is complete, all results are displayed.
CANdi Self Test Results screen
CANdi Module Troubleshooting Guide
If a CANdi module is not functioning properly, please perform the following tests:
1. Make sure the CANdi module is properly grounded by connecting to a vehicle or by
using the 12-pin ALDL connector, which has the signal and chassis ground shorted.
IMPORTANT:
If not properly grounded, the CANdi module will appear to be defective
when it is not. The CANdi module will fail due to improper grounding if you use the 16-pin
DLC (J-1962) connector and power the Tech2 from an AC/DC power supply. The adapter
you use must have a GM part number. Although PVI adapters are similar to GM adapters,
they will not work with the CANdi module.
2. Verify that the Tech2 passes all stand-alone self-tests. Replace the Tech2 if it fails. If
the Tech2 passes, proceed to step three. The CANdi module must be disconnected to
run self-tests. If the CANdi module is connected, a message will appear instructing you
to disconnect the module.
3. Verify that the VCI passes self-tests. Replace the VCI if it fails. If the VCI passes,
proceed to step four. The CANdi module must be disconnected to run self-tests. If the
CANdi module is connected, a message will appear instructing you to disconnect the
module.
Summary of Contents for Tech2
Page 1: ...General Motors Tech2 User Guide 1 GM Tech2 User Guide ...
Page 20: ...General Motors Tech2 User Guide 20 Connection of the power jack to the DLC cable ...
Page 22: ...General Motors Tech2 User Guide 22 ...
Page 24: ...General Motors Tech2 User Guide 24 PCMCIA card keying ...
Page 26: ...General Motors Tech2 User Guide 26 VCI module removal ...
Page 32: ...General Motors Tech2 User Guide 32 Attaching the Tech2 to non OBD II equipped vehicles ...
Page 40: ...General Motors Tech2 User Guide 40 RS 232 cable connections ...
Page 46: ...General Motors Tech2 User Guide 46 Tech2 startup screen ...
Page 47: ...General Motors Tech2 User Guide 47 Tools Options selected on Main Menu ...
Page 52: ...General Motors Tech2 User Guide 52 Test Status ...
Page 53: ...General Motors Tech2 User Guide 53 Test Pass ...
Page 64: ...General Motors Tech2 User Guide 64 Selectable VCI test selected on Tech2 Self Test main menu ...
Page 65: ...General Motors Tech2 User Guide 65 First selectable VCI Self Test screen ...
Page 78: ...General Motors Tech2 User Guide 78 CANdi Diagnostics selected on Tool Options menu ...
Page 86: ...General Motors Tech2 User Guide 86 System Selection Menu ...
Page 97: ...General Motors Tech2 User Guide 97 Tool Controls Menu ...
Page 98: ...General Motors Tech2 User Guide 98 Hardware Menu ...
Page 101: ...General Motors Tech2 User Guide 101 Accept soft key on data screen ...
Page 103: ...General Motors Tech2 User Guide 103 Live Plot Screen with selectable items ...
Page 104: ...General Motors Tech2 User Guide 104 Min Max Adjustment screen ...
Page 106: ...General Motors Tech2 User Guide 106 Live Plot Resume soft key ...
Page 107: ...General Motors Tech2 User Guide 107 Live Plot Data List soft key ...
Page 136: ...General Motors Tech2 User Guide 136 Programming Failed Screen ...
Page 141: ...General Motors Tech2 User Guide 141 Controller Area Network diagnostic interface CANdi module ...