GMC Tech 2 - CCD; Dlc 1; Dlc 2; Mux

VCI MODULE DIAGNOSTIC CHART
Test Results 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 a failure occurs, cycle Tech 2 and retest.
If problem persists, contact Customer Support.
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)
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.
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