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DTC P0107 MANIFOLD ABSOLUTE PRESSURE/BAROMETRIC PRESSURE CIRCUIT LOW INPUT

DTC P0107 MANIFOLD ABSOLUTE PRESSURE/BAROMETRIC PRESSURE CIRCUIT LOW INPUT

DTC DETECTING CONDITION:


• Immediately at fault recognition

• GENERAL DESCRIPTION


Important

After repair or replacement of faulty parts, conduct Clear Memory Mode and Inspection Mode .


WIRING DIAGRAM:


CHECK INPUT SIGNAL FOR ECM.

Measure the voltage between ECM connector and chassis ground.

Connector & terminal

(B135) No. 9 (+) — Chassis ground (−):

Is the voltage more than 4.5 V?

Yes


No


CHECK INPUT SIGNAL FOR ECM.

Measure the voltage between ECM connector and chassis ground.

Connector & terminal

(B135) No. 9 (+) — Chassis ground (−):

Shake the ECM harness and connector, while monitoring value of voltage meter. Does the voltage change?

Yes

Repair the poor contact in ECM connector.


No

Contact Service Center.


CHECK INPUT SIGNAL FOR ECM.

Measure the voltage between ECM and chassis ground.

Connector & terminal

(B135) No. 8 (+) — Chassis ground (−):

Is the voltage less than 0.7 V?

Yes


No

Contact Service Center.


CHECK HARNESS BETWEEN ECM AND MANIFOLD ABSOLUTE PRESSURE SENSOR CONNECTOR.

Turn the ignition switch to OFF.

Disconnect the connector from manifold absolute pressure sensor.

Turn the ignition switch to ON.

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

Connector & terminal

(E21) No. 3 (+) — Engine ground (−):

Is the voltage more than 4.5 V?

Yes


No

Repair the open circuit in harness between ECM and manifold absolute pressure sensor connector.


CHECK HARNESS BETWEEN ECM AND MANIFOLD ABSOLUTE PRESSURE SENSOR CONNECTOR.

Turn the ignition switch to OFF.

Disconnect the connector from ECM.

Measure the resistance of harness between ECM and manifold absolute pressure sensor connector.

Connector & terminal

(B135) No. 19 — (E21) No. 2:

Is the resistance less than 1 Ω?

Yes


No

Repair the open circuit in harness between ECM and manifold absolute pressure sensor connector.


CHECK HARNESS BETWEEN ECM AND MANIFOLD ABSOLUTE PRESSURE SENSOR CONNECTOR.

Measure the resistance of harness between manifold absolute pressure sensor connector and engine ground.

Connector & terminal

(E21) No. 1 — Engine ground:

Is the resistance more than 1 MΩ?

Yes


No

Repair the ground short circuit in harness between ECM and manifold absolute pressure sensor connector.


CHECK POOR CONTACT.

Check poor contact in manifold absolute pressure sensor connector.

Is there poor contact in manifold absolute pressure sensor connector?

Yes

Repair the poor contact in manifold absolute pressure sensor connector.


No

Replace the manifold absolute pressure sensor.