CHECK HARNESS BETWEEN ECM, MASS AIR FLOW AND INTAKE AIR TEMPERATURE SENSOR CONNECTORS.

1) Turn the ignition switch to OFF.

2) Measure the resistance of harness between the mass air flow and intake air temperature sensor connector and engine ground.

Connector & terminal

(B3) No. 4 — Engine ground:

QUESTION

Is the resistance less than 5 Ω?

Yes No

Repair the harness and connector.

NOTE:

In this case, repair the following item:

Open circuit of harness between ECM and mass air flow and intake air temperature sensor connectors.

Poor contact in ECM connector

Poor contact of coupling connector