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DTC P0108 MANIFOLD ABSOLUTE PRESSURE/BAROMETRIC PRESSURE CIRCUIT HIGH INPUT

DTC P0108 MANIFOLD ABSOLUTE PRESSURE/BAROMETRIC PRESSURE CIRCUIT HIGH 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 CURRENT DATA.

Start the engine.

Read the data of intake manifold absolute pressure signal using Vehicle Diagnostic Interface or OBD-II general scan tool.

Note
• Vehicle Diagnostic Interface

For detailed operation procedure, refer to the “READ CURRENT DATA FOR ENGINE”.

• OBD-II general scan tool

For detailed operation procedures, refer to the OBD-II General Scan Tool Instruction Manual.


Is the measured value more than 119.5 kPa (896.5 mmHg, 35.29 inHg)?

Yes


No


CHECK OUTPUT SIGNAL FOR ECM.

Measure the voltage between ECM connector and chassis ground.

Connector & terminal

(B135) No. 3 (+) — Chassis ground (−):

Is the voltage more than 4.5 V?

Yes


No


CHECK OUTPUT SIGNAL FOR ECM.

Measure the voltage between ECM connector and chassis ground.

Connector & terminal

(B135) No. 3 (+) — Chassis ground (−):

Does the voltage change by shaking the ECM harness and connector?

Yes

Repair poor contact in ECM connector.


No

Contact Service Center.


CHECK INPUT SIGNAL FOR ECM.

Measure the voltage between ECM connector and chassis ground.

Connector & terminal

(B135) No. 15 (+) — Chassis ground (−):

Is the voltage less than 0.2 V?

Yes


No


CHECK INPUT SIGNAL FOR ECM. (USING Vehicle Diagnostic Interface)

Read the data of atmospheric absolute pressure signal using Vehicle Diagnostic Interface.

Note
• Vehicle Diagnostic Interface

For detailed operation procedure, refer to the “READ CURRENT DATA FOR ENGINE”.


Is the measured value more than 13.3 kPa (100 mmHg, 3.94 inHg) by shaking the harness and connector of ECM?

Yes

Repair poor contact in ECM connector.


No


CHECK HARNESS BETWEEN MANIFOLD ABSOLUTE PRESSURE SENSOR AND ECM 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 open circuit in harness between ECM and manifold absolute pressure sensor connector.


CHECK HARNESS BETWEEN MANIFOLD ABSOLUTE PRESSURE SENSOR AND ECM 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. 15 — (E21) No. 2:

Is the resistance less than 1 Ω?

Yes


No

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


CHECK HARNESS BETWEEN MANIFOLD ABSOLUTE PRESSURE SENSOR AND ECM CONNECTOR.

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

Connector & terminal

(B135) No. 19 — (E21) No. 1:

Is the resistance less than 1 Ω?

Yes


No

Repair open 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 poor contact in manifold absolute pressure sensor connector.


No

Replace the manifold absolute pressure sensor.


CHECK HARNESS BETWEEN MANIFOLD ABSOLUTE PRESSURE SENSOR AND ECM CONNECTOR.

Turn the ignition switch to OFF and Vehicle Diagnostic Interface or the OBD-II general scan tool switch to OFF.

Disconnect the connector from manifold absolute pressure sensor.

Turn the ignition switch to ON and Vehicle Diagnostic Interface or the OBD-II general scan tool switch to ON.

Read the data of intake manifold absolute pressure signal using Vehicle Diagnostic Interface or OBD-II general scan tool.

Note
• Vehicle Diagnostic Interface

For detailed operation procedure, refer to the “READ CURRENT DATA FOR ENGINE”.

• OBD-II general scan tool

For detailed operation procedures, refer to the OBD-II General Scan Tool Instruction Manual.


Is the measured value more than 119.5 kPa (896.5 mmHg, 35.29 inHg)?

Yes

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


No

Replace the manifold absolute pressure sensor.