Cobalt L4-2.4L (2007)
Step 9 - Step 18
The numbers below refer to the step numbers on the diagnostic table.
2. A partial malfunction in the low speed GMLAN serial data circuits uses a different procedure from a total malfunction of the low speed GMLAN
data circuits.
3. The DTC U2100 may be retrieved with a history status, but is not the cause of the present condition.
7. Data link connector terminal 1 provides the connection to the GMLAN serial data low circuit and the GMLAN serial data low circuit respectively.
16. The communication malfunction may have prevented diagnosis of the customer complaint.
Scan Tool Does Not Power Up
