P1144

CA: DTC P1144 - PRESSURE SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM (HIGH INPUT)

DTC DETECTING CONDITION:
- Two consecutive driving cycles with fault

CAUTION: After repair or replacement of faulty parts, conduct CLEAR MEMORY and INSPECTION MODES. Clearing Diagnostic Trouble Codes





WIRING DIAGRAM

10CA1: CHECK IDLE SWITCH SIGNAL.
1) Turn ignition switch to OFF.





2) Connect Subaru Select Monitor to data link connector.

3) Turn ignition switch to ON and Subaru Select Monitor switch to ON.

4) Operate the LED operation mode for engine using Subaru Select Monitor.

NOTE:
- Subaru Select Monitor
For detailed operation procedure, refer to the "LED OPERATION MODE FOR ENGINE".

CHECK: Does the LED of (idle Switch Signal) come on?

YES: Go to step 10CA2.

NO: Check throttle position sensor circuit.

NOTE:
In this case, it is not necessary to inspect DTC P1144.

10CA2: CHECK DATA FOR CONTROL.
1) Turn ignition switch to OFF.





2) Connect Subaru Select Monitor or the OBD-II general scan tool to data link connector.

3) Turn ignition switch ON and Subaru Select Monitor or the OBD-II general scan tool switch ON.

4) Start engine.

5) Read data of atmospheric absolute pressure signal using Subaru Select Monitor or OBD-II general scan tool.

NOTE:
- Subaru Select Monitor
For detailed operation procedure, refer to the "READ CURRENT DATA SHOWN ON DISPLAY FOR ENGINE".
- OBD-II general scan tool
For detailed operation procedures, refer to the OBD-II General Scan Tool Instruction Manual.

CHECK: Is the value more than 133 kPa (998 mmHg, 39.29 inHg)?

YES: Replace pressure sensor.

NO: Even if MIL lights up, the circuit has returned to a normal condition at this time. Contact with Subaru of America (SOA) service.

NOTE:
Inspection by Subaru of America's DTM is required, because probable cause is deterioration of multiple parts.