Test O: No Module/Network Communication - No Power To The Diagnostic Tool

PINPOINT TEST O: NO MODULE/NETWORK COMMUNICATION - NO POWER TO THE DIAGNOSTIC TOOL

O1-O2:

O3-O4:

Normal Operation
The diagnostic tool is connected to the data link connector (DLC) C251 to communicate with the controller area network (CAN), the international standards organization (ISO) 9141, and standard corporate protocol (SCP) communications networks. If communication can not be established, the diagnostic tool and the DLC C251 must be checked for damage. If the diagnostic tool and the DLC C251 are OK, circuits 40 (LB/WH), 57 (BK), and 570 (BK/WH) must be checked for an open condition.

Possible Causes
- fuse
- circuit 40 (LB/WH) open
- circuit 57 (BK) open
- circuit 570 (BK/WH) open
- diagnostic tool
- DLC C251