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

Measure the voltage between mass air flow and intake air temperature sensor connector and engine ground.

Connector & terminal

(B3) No. 4 (+) — Engine ground (−):

QUESTION

Is the voltage 3 V or more?

Yes No

Repair the harness and connector.

NOTE:

In this case, repair the following item:

Open circuit in harness between mass air flow and intake air temperature sensor and ECM connector

Poor contact in mass air flow and intake air temperature sensor

Poor contact in ECM

Poor contact of coupling connector

Poor contact of joint connector