Using the tester, check the harness between terminals of data link connector and electric power steering CM.
Connector & terminal
Check open circuit
(B40) No. 14 — (B450) No. 7: (B40) No. 6 — (B450) No. 6:
Check short circuit
(B450) No. 6 — Chassis ground: (B450) No. 7 — Chassis ground: (B450) No. 6 — No. 7:
Is harness normal?
Replace the EPS CM.
Repair or replace the harness.