CHECK HARNESS BETWEEN ECM AND MANIFOLD ABSOLUTE PRESSURE AND INTAKE AIR TEMPERATURE SENSOR CONNECTOR.

1) Connect all connectors.

2) Turn the ignition switch to OFF.

3) Measure the voltage between ECM connector and chassis ground.

Connector & terminal

(B134) No. 77 (+) — Chassis ground (−):

QUESTION
Is the voltage 5 V or more?
Yes	No
Repair the short circuit to power in harness between ECM connector and the manifold absolute pressure and intake air temperature sensor connector.	Replace the manifold absolute pressure and intake air temperature sensor.