Test J: No Module/Network Communication

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

J1-J3:

J4:

Normal Operation
Under normal operation the diagnostic tool is connected to the data link connector (DLC) C251 to communicate with the high speed controller area network (CAN), medium speed CAN, and International Standards Organization (ISO) 9141 communication networks. If communication cannot 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 570 (BK/WH), 1047 (LG/RD) and 1205 (BK) must be checked for an open condition.

Possible Causes
- fuse
- DLC C251
- diagnostic tool
- circuit 570 (BK/WH) open
- circuit 1047 (LG/RD) open
- circuit 1205 (BK) open