1) Disconnect the connectors from VDCCM.
2) Remove the cover from VDCCM.
3) Connect the connector to the VDCCM.
4) Measure the resistance between VDCCM and chassis ground.
Connector & terminal
(B310) No. 75 — Chassis ground:
Is the resistance less than 0.5 Ω?
Replace the harness between VDCH/U and VDCCM.