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

1) Connect all the connectors.

2) Turn the ignition switch to ON.

3) Measure the voltage between ECM and chassis ground.

Connector & terminal

(B136) No. 9 (+) — Chassis ground (−):

QUESTION
Is the voltage 5 V or more?
Yes	No
Repair the short circuit of harness to power supply between ECM and mass air flow and intake air temperature sensor connector.	Replace the mass air flow and intake air temperature sensor.