Measure the resistance between ECM and data link connector.
Connector & terminal
(B135) No. 1 — (B40) No. 11:
(B135) No. 2 — (B40) No. 3:
Is the resistance 1 Ω or less?
Repair the harness and connector.
NOTE:
In this case, repair the following item:
• Open circuit of harness between ECM and data link connector
• Poor contact of joint connector