Measure the resistance between ECM and data link connector.
Connector & terminal
(B136) No. 35 — (B40) No. 14:
(B136) No. 27 — (B40) No. 6:
Is the resistance 1 Ω or less?
Repair the harness and connector.
NOTE:
In this case, repair the following item:
• Open circuit in harness between ECM and data link connectors.
• Poor contact of joint connector