DTC P0517 Battery Temperature Sensor Circuit High: Notes

DTC detecting condition: 

Immediately at fault recognition

Wiring diagram: 

Engine Electrical System Ref. to WIRING SYSTEM>Engine Electrical System>WIRING DIAGRAM .

1. CHECK CURRENT DATA. 
   1. Start the engine.
   2. Using the Subaru Select Monitor, read the value in [Battery temperature].
      NOTE: For detailed procedures, refer to "Data Monitor". Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>Subaru Select Monitor .

   Is the value of [Battery temperature] -40°C (-40°F) or less?

   • Yes: Go to  2.
   • No: Even if DTC is detected, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis.
     NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.
2. CHECK FOR POOR CONTACT. 

   Check for poor contact between the ECM and battery current & temperature sensor connectors.

   Is there poor contact of the ECM or battery current & temperature sensor connectors?

   • Yes: Repair any poor contact between the ECM or battery current & temperature sensor connectors.
   • No: Go to  3.
3. CHECK HARNESS BETWEEN ECM AND BATTERY CURRENT & TEMPERATURE SENSOR CONNECTOR. 
   1. Turn the ignition switch to OFF.
   2. Disconnect the connectors from the battery current & temperature sensor.
   3. Disconnect the connector from ECM.
   4. Measure the resistance of harness between ECM and battery current & temperature sensor connector.

      Connector & terminal 

      (B134) No. 41 - (B472) No. 1:

      (B134) No. 19 - (B472) No. 4:

   Is the resistance less than 1 Ω?

   • Yes: Go to  4.
   • No: repair the harness and connector.
     NOTE: In this case, repair the following item:

     • Open circuit in harness between ECM and battery current & temperature sensor connector
     • Poor contact of joint connector
4. CHECK HARNESS BETWEEN ECM AND BATTERY CURRENT & TEMPERATURE SENSOR CONNECTOR. 
   1. Connect all connectors.
   2. Turn the ignition switch to ON.
   3. Measure the voltage between ECM and engine ground.

      Connector & terminal 

      (B134) No. 41 (+) - Engine ground (-):

   Is the voltage 5 V or more?

   • Yes: Repair the short circuit to power supply in harness between ECM and battery current & temperature sensor connector.
   • No: Replace the battery current & temperature sensor. Ref. to STARTING/CHARGING SYSTEMS(H4DO)>Battery Current & Temperature Sensor .