(1) Disconnect the PHEV-ECU connector (B508), and measure at the wiring harness side.
(2) Check the continuity between the PHEV-ECU connector (NCCP terminal) and body ground.
OK: No continuity
Is the check result normal?
Repair the connector(s) or wiring harness in NCCP line between the PHEV-ECU connector and On Board Charger (OBC).