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

1) Turn the ignition switch to OFF.

2) Disconnect the connector from ECM and front oxygen (A/F) sensor connector.

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

Connector & terminal

(B135) No. 8 — (B262) No. 3:

(B135) No. 9 — (B262) No. 4:

QUESTION

Is the resistance less than 1 Ω?

Yes No

Replace the front oxygen (A/F) sensor.

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