Measure the resistance of harness between ECM connector and chassis ground.
Connector & terminal
(B134) No. 3 — Chassis ground:
(B134) No. 4 — Chassis ground:
(B134) No. 5 — Chassis ground:
Is the resistance less than 5 Ω?
Repair the harness and connector.
NOTE:
In this case, repair the following item:
• Open circuit of harness between ECM and engine ground cable
• Poor contact in ECM connector
• Poor contact of coupling connector