General Motors Tech2 User Guide
57
PCB Diagnostic Chart
Test
Results
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 Tech2 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 Tech2 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 Tech2 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
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 Tech2
power and retest. If time is not
retained, contact Customer
Support
Diagnostic chart for Tech2 Main Printed Circuit Board (PCB)
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 ...