P0183
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. Clear Memory Mode
WIRING DIAGRAM
10V1: CHECK CURRENT DATA.
1. Start engine.
2. 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". Refer to Normal Scan Data Values.
- 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 10V2.
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 (B22, B99, B98 and R57).
10V2: 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 mare than 10 V?
YES: Repair battery short circuit in harness between ECM and fuel pump connector.
NO: Go to step 10V3.
10V3: 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 10V4.
10V4: 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 10V5.
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).
10V5: 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 (B22, B97 and R57).