DTC P0183 Fuel Temperature Sensor "A" Circuit High Input

WARNING: This page is about a different car, the 2006 Subaru Outback. However, it is still accessible from the selected car via links, so may be relevant.

DTC DETECTING CONDITION:

Immediately at fault recognition
GENERAL DESCRIPTION < Ref. to DTC P0183 FUEL TEMPERATURE SENSOR "A" CIRCUIT HIGH INPUT , Diagnostic Trouble Code (DTC) Detecting Criteria. >

CAUTION: After repair or replacement of faulty parts, perform Clear Memory Mode < Ref. to OPERATION , Clear Memory Mode. > and Inspection Mode < Ref. to PROCEDURE , Inspection Mode. >.

WIRING DIAGRAM:

Fig 1: Fuel Temperature Sensor - Wiring Diagram

DTC P0183 FUEL TEMPERATURE SENSOR "A" CIRCUIT HIGH INPUT - DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 CHECK CURRENT DATA. Start the engine. Read the data of fuel temperature sensor signal using Subaru Select Monitor. NOTE: Subaru Select Monitor For detailed operation procedure, refer to "READ CURRENT DATA FOR ENGINE". < Ref. to SUBARU SELECT MONITOR . >	Is the temperature less than -40°C (-40°F)?	Go to step 2.	Repair the poor contact. NOTE: In this case, repair the following item: Poor contact in fuel pump connector Poor contact in ECM connector Poor contact in coupling connector Poor contact in joint connector
2 CHECK HARNESS BETWEEN FUEL TEMPERATURE SENSOR AND ECM CONNECTOR. Turn the ignition switch to OFF. Remove the access hole lid. Disconnect the connector from fuel pump. Measure the voltage between fuel pump connector and chassis ground. Connector & terminal (R58) No. 2 (+) - Chassis ground (-):	Is the voltage more than 10 V?	Repair battery short circuit of harness between ECM and fuel pump connector.	Go to step 3.
3 CHECK HARNESS BETWEEN FUEL TEMPERATURE SENSOR AND ECM CONNECTOR. Turn the ignition switch to ON. Measure the voltage between fuel pump connector and chassis ground. Connector & terminal (R58) No. 2 (+) - Chassis ground (-):	Is the voltage more than 10 V?	Repair battery short circuit of harness between ECM and fuel pump connector.	Go to step 4.
4 CHECK HARNESS BETWEEN FUEL TEMPERATURE SENSOR AND ECM CONNECTOR. Measure the voltage between fuel pump connector and chassis ground. Connector & terminal (R58) No. 2 (+) - Chassis ground (-):	Is the voltage more than 4 V?	Go to step 5.	Repair the harness and connector. NOTE: In this case, repair the following item: Open circuit in harness between ECM and fuel pump connector Poor contact in fuel pump connector Poor contact in ECM connector Poor contact in coupling connector
5 CHECK HARNESS BETWEEN FUEL TEMPERATURE SENSOR AND ECM CONNECTOR. Turn the ignition switch to OFF. Disconnect the connectors from ECM. Measure the resistance of harness between fuel pump connector and ECM. Connector & terminal (R58) No. 3 - (B135) No. 30:	Is the resistance less than 1 Ω?	Replace the fuel temperature sensor. < Ref. to FUEL TEMPERATURE SENSOR . >	Repair the harness and connector. NOTE: In this case, repair the following item: Open circuit in harness between ECM and fuel pump connector Poor contact in fuel pump connector Poor contact in ECM connector Poor contact in coupling connector Poor contact in joint connector