chevrolet Workshop Repair Guides

Chevrolet Workshop Service and Repair Manuals

Scan Tool Does Not Communicate With Class 2 Device|Page 4987 > < Scan Tool Does Not Communicate With Class 2 Device|Page 4985
Page 5
background image

Steps 27 - 35

The numbers below refer to the step numbers on the diagnostic table.
2. A partial malfunction in the class 2 serial data circuit uses a different procedure from a total malfunction of the class 2 serial data circuit. The

following modules communicate on the class 2 serial data circuit:
-

Auxiliary power drop connector

-

BCM

-

Driver information center (DIC)

-

Electronic brake control module (EBCM)

-

Instrument panel cluster (IPC)

-

Powertrain control module (PCM)

-

Radio

-

OnStar (UE1)

-

Sensing and diagnostic module (SDM)

Scan Tool Does Not Communicate With Class 2 Device|Page 4987 > < Scan Tool Does Not Communicate With Class 2 Device|Page 4985