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

1) Turn the ignition switch to OFF.

2) Disconnect the connector from the mass air flow and intake air temperature sensor.

3) 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 10 V or more?

Yes No

Repair the short to power supply in harness between the mass air flow and intake air temperature sensor and ECM connector.