DTC P0107 - Manifold Absolute Pressure/Barometric Pressure Circuit Low Input -

WARNING: This page is about a different variant/trim than selected.

DTC DETECTING CONDITION:
- Detected simultaneously at occurrence of malfunction.
CAUTION: After repair or replacement of malfunctioning parts, conduct Clear Memory Mode < Ref. to OPERATION , CLEAR MEMORY MODE > and INSPECTION MODE < Ref. to OPERATION , INSPECTION MODE. >
WIRING DIAGRAM:

Fig 1: Manifold Absolute Pressure/Barometric Pressure Wiring Diagram
Courtesy of SUBARU OF AMERICA, INC.

DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 CHECK CURRENT DATA. Start engine. Read the data of intake manifold absolute pressure signal using Subaru Select Monitor or general scan tool. NOTE: Subaru Select Monitor For detailed operation procedure, refer to the "READ CURRENT DATA FOR ENGINE". < Ref. to SUBARU SELECT MONITOR . > General scan tool For detailed operation procedures, refer to the General Scan Tool Instruction Manual.	Is the measured value less than 13.3 kPa (100 mmHg, 3.94 inHg)?	Go to step 3.	Go to step 2.
2 CHECK POOR CONTACT. Check poor contact in ECM and pressure sensor connector.	Is there poor contact in ECM or pressure sensor connector?	Repair poor contact in ECM or pressure sensor connector.	Even if MIL lights up, the circuit has returned to a normal condition at this time.
3 CHECK INPUT SIGNAL FOR ECM. Measure voltage between ECM connector and chassis ground. Connector & terminal (B135) No. 3 (+) - Chassis ground (-):	Is the measured value more than 4.5 V?	Go to step 5.	Go to step 4.
4 CHECK INPUT SIGNAL FOR ECM. Measure voltage between ECM connector and chassis ground. Connector & terminal (B135) No. 3 (+) - Chassis ground (-):	Is the measured value more than 4.5 V when shaking harness and connector of ECM?	Repair poor contact in ECM connector.	Contact with SOA (distributor) service. NOTE: Inspection by DTM is required, because probable cause is deterioration of multiple parts.
5 CHECK INPUT SIGNAL FOR ECM. Measure voltage between ECM and chassis ground. Connector & terminal (B135) No. 15 (+) - Chassis ground (-):	Is the measured value less than 0.2 V?	Go to step 7.	Go to step 6.
6 CHECK INPUT SIGNAL FOR ECM. (USING SUBARU SELECT MONITOR.) Read data of atmospheric absolute pressure signal using Subaru Select Monitor. NOTE: Subaru Select Monitor For detailed operation procedure, refer to the "READ CURRENT DATA FOR ENGINE". < Ref. to SUBARU SELECT MONITOR . >	Is the measured value more than 13.3 kPa (100 mmHg, 3.94 inHg) when shaking harness and connector of ECM?	Repair poor contact in ECM connector.	Go to step 7.
7 CHECK HARNESS BETWEEN ECM AND PRESSURE SENSOR CONNECTOR. Turn ignition switch to OFF. Disconnect connector from pressure sensor. Turn ignition switch to ON. Measure voltage between intake air temperature sensor and pressure sensor connector and engine ground. Connector & terminal (E21) No. 3 (+) - Engine ground (-):	Is the measured value more than 4.5 V?	Go to step 8.	Repair open circuit in harness between ECM and pressure sensor connector.
8 CHECK HARNESS BETWEEN ECM AND PRESSURE SENSOR CONNECTOR. Turn ignition switch to OFF. Disconnect connector from ECM. Measure resistance of harness between ECM and pressure sensor connector. Connector & terminal (B135)No. 19 - (E21)No. 1:	Is the measured value less than 1 Ω?	Go to step 9.	Repair open circuit in harness between ECM and pressure sensor connector.
9 CHECK HARNESS BETWEEN ECM AND PRESSURE SENSOR CONNECTOR. Measure resistance of harness between pressure sensor connector and engine ground. Connector & terminal (E21) No. 2 - Engine ground:	Is the measured value more than 500 kΩ?	Go to step 10 .	Repair ground short circuit in harness between ECM and intake air temperature and pressure sensor connector.
10 CHECK POOR CONTACT. Check poor contact in intake manifold pressure sensor connector.	Is there poor contact in intake manifold pressure sensor connector?	Repair poor contact in pressure sensor connector.	Replace pressure sensor. < Ref. to PRESSURE SENSOR . >