CHECK POWER SUPPLY OF THE MANIFOLD ABSOLUTE PRESSURE SENSOR.

1) Turn the ignition switch to OFF.

2) Disconnect the connector from manifold absolute pressure sensor.

3) Turn the ignition switch to ON.

4) Measure the voltage between manifold absolute pressure sensor connector and engine ground.

Connector & terminal

(E21) No. 3 (+) — Engine ground (−):

QUESTION

Is the voltage 4.5 V or more?

Yes No

Repair the harness and connector.

NOTE:

In this case, repair the following item:

• Open circuit of harness between ECM and manifold absolute pressure sensor connector.

• Poor contact in ECM connector

• Poor contact of coupling connector