P0183
W: DTC P0183 - FUEL TEMPERATURE SENSOR A CIRCUIT HIGH INPUTDTC DETECTING CONDITION:
- Immediately at fault recognition
CAUTION: After repair or replacement of faulty parts, conduct CLEAR MEMORY MODE and INSPECTION MODE. Refer to How To Clear Diagnostic Trouble Codes. Clearing Diagnostic Trouble Codes
WIRING DIAGRAM
10W1: CONNECT SUBARU SELECT MONITOR OR THE OBD-II GENERAL SCAN TOOL, AND READ DATA.
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 to ON and Subaru Select Monitor or OBD-II general scan tool switch to ON.
4) Start engine.
5) Read data of fuel temperature sensor 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 less than -40°C (-40°F)?
YES: Go to step 10W2.
NO: Repair poor contact.
NOTE:
In this case, repair the following:
- Poor contact in fuel pump connector
- Poor contact in ECM connector
- Poor contact in coupling connectors (B21),(B98), (B97), and (R57)
10W2: CHECK HARNESS BETWEEN FUEL TEMPERATURE SENSOR AND ECM CONNECTOR.
1) Turn ignition switch to OFF.
2) Remove access hole lid.
3) Disconnect connector from fuel pump.
Connector Terminal (R58) No.6 (+) - Chassis Ground (-):
4) Measure voltage between fuel pump connector and chassis ground.
CHECK: Is the voltage more than 10 V?
YES: Repair battery short circuit in harness between ECM and fuel pump connector.
NO: Go to step 10W3.
10W3: CHECK HARNESS BETWEEN FUEL TEMPERATURE SENSOR AND ECM CONNECTOR.
1) Turn ignition switch to ON.
Connector Terminal (R58) No.6 (+) - Chassis Ground (-):
2) Measure voltage between fuel pump connector and chassis ground.
CHECK: Is the voltage more than 10 V?
YES: Repair battery short circuit in harness between ECM and fuel pump connector.
NO: Go to step 10W4.
10W4: CHECK HARNESS BETWEEN FUEL TEMPERATURE SENSOR AND ECM CONNECTOR.
Connector Terminal (R58) No.6 (+) - Chassis Ground (-):
Measure voltage between fuel pump connector and chassis ground.
CHECK: Is the voltage more than 4 V?
YES: Go to step 10W5.
NO: Repair harness and connector.
NOTE:
In this case, repair the following: -
- 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 connectors (B98) and (R57)
10W5: CHECK HARNESS BETWEEN FUEL TEMPERATURE SENSOR AND ECM CONNECTOR.
1) Turn ignition switch to OFF.
Connector Terminal (R58) No.5 (+) - Chassis Ground (-):
2) Measure resistance of harness between fuel pump connector and chassis ground.
CHECK: Is the resistance less than 5 Ohms?
YES: Replace fuel temperature sensor.
NO: Repair harness and connector.
NOTE:
In this case, repair the following:
- 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 connectors (B21), (B97) and (R57)