GMC Tech2 - Page 59

General Motors Tech2 User Guide
59
VCI MODULE DIAGNOSTIC CHART (continued)
Test
Results
Solution
GND FET
(Ground Field
Effect Transistor)
GND FET – pass/fail
Check loopback adapter
to make sure it is
connected, cycle Tech2
and retest. If problem
persists, contact Customer
Support
VCI HBCC
(Hosted Bus
Control Chip)
HPCC – pass/fail
If HBCC chip fails, cycle
Tech2 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 Tech2 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 Tech2 and retest. If
problem persistes, 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
Tech2 and retest. If
problem persists, contact
Customer Support.