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

1) Connect all connectors.

2) Turn the ignition switch to ON.

3) Measure the voltage between ECM and chassis ground.

Connector & terminal

(B135) No. 18 (+) — Chassis ground (−):

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