Test Q: No Module/Network Communication - No Power To The Diagnostic Tool
PINPOINT TEST Q: NO MODULE/NETWORK COMMUNICATION - NO POWER TO THE DIAGNOSTIC TOOLQ1-Q2:
Q3-Q4:
Normal Operation
The diagnostic tool connects to the data link connector (DLC) C251 to communicate with the standard corporate protocol (SCP), controller area network (CAN), UART-based protocol (UBP), and the 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, circuit 40 (LB/WH) must be checked for voltage and ground circuits 1203 (BK/LB), and 1205 (BK) must be checked for an open condition.
Possible Causes
- fuse
- DLC C251
- diagnostic tool
- voltage, circuit 40 (LB/WH) open or short to ground
- ground circuit 1203 (BK/LB) open circuit
- ground circuit 1205 (BK) open circuit