Communication with any system is not possible

Communication with Scan-Tool is not possible. (Communication with any system is not possible)

DETECTING CONDITION





INSPECTION PROCEDURES
CHECK THE POWER SUPPLY CIRCUIT FOR THE DIAGNOSIS
Measure the voltage between terminal 9 of the data link connector and body ground.
Specification: approximately B+
Is voltage within specification?
YES
>Check the ground circuit for the diagnosis.
NO
>Repair an open in the wire. Check and replace fuse (15A) from the engine compartment junction block.





CHECK THE GROUND CIRCUIT FOR THE DIAGNOSIS
Check for continuity between terminal 5 of the data link connector and body ground.
Is there continuity?
NO
Repair an open in the wire between terminal 5 of the data link connector and ground point.