CHECK HARNESS BETWEEN ECM AND FRONT OXYGEN (A/F) SENSOR.

1) Turn the ignition switch to OFF.

2) Disconnect the connectors from the ECM.

3) Measure the resistance between ECM and front oxygen (A/F) sensor connector.

Connector & terminal

(B136) No. 3 — (B379) No. 2:

(B136) No. 2 — (B379) No. 2:

QUESTION

Is the resistance less than 1 Ω?

Yes No

Repair the open circuit of harness between ECM and front oxygen (A/F) sensor.