DTC P0ABF-00: Hybrid/EV Battery Current Sensor "A" Circuit Range/Performance: Notes

1. - 

Outline of diagnosis: 

Property malfunction of the battery current sensor is detected through the relationship between the HV system power consumption and battery output power

(1 trip detection logic)

Trouble symptom: 

• Reduced output power
• Engine not stopped

Wiring diagram: 

Hybrid system Ref. to WIRING SYSTEM (CROSSTREK MODEL (HEV))>HYBRID ELECTRIC VEHICLE SYSTEM>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK Wire harness AND CONNECTOR (Battery ECU assembly - HV battery junction block) (OPEN CIRCUIT)  .
   CAUTION:

   • Make sure to wear insulated gloves and protective goggles during the work.
   • Never turn to READY ON with Service plug removed to prevent faults.
   1. Check that the Service plug is disconnected. Ref. to HYBRID ELECTRIC VEHICLE>SERVICE PLUG .
   2. Disconnect HV battery junction block connector (HV54).
      NOTE: Before disconnecting the connector, check the connector for connecting condition and mating looseness.
   3. Disconnect Battery ECU assembly connector (HV42).
      NOTE: Before disconnecting the connector, check the connector for connecting condition and mating looseness.
   4. Using a tester, measure the resistance between Battery ECU assembly connector and HV battery junction block (BATTERY CURRENT SENSOR) connector.

      Connector & terminal 

      (HV42) No. 30 - (HV54) No. 2:

      (HV42) No. 31 - (HV54) No. 3:

      (HV42) No. 7 - (HV54) No. 4:

      (HV42) No. 8 - (HV54) No. 1:

   Is the resistance less than 1 Ω?

   Yes  : Go to  2.

   No  : Repair or replace Wire harness between Battery ECU assembly connector and HV battery junction block (BATTERY CURRENT SENSOR) connector.

2. CHECK Wire harness AND CONNECTOR (Battery ECU assembly - HV battery junction block) (SHORT TO GROUND)  .

   Using a tester, measure the resistance between HV battery junction block (BATTERY CURRENT SENSOR) connector and chassis ground.

   Connector & terminal 

   (HV54) No. 2 - Chassis ground:

   (HV54) No. 3 - Chassis ground:

   (HV54) No. 4 - Chassis ground:

   (HV54) No. 1 - Chassis ground:

   Is the resistance 10 kΩ or more?

   Yes  : Go to  3.

   No  : Repair or replace Wire harness between Battery ECU assembly connector and HV battery junction block (BATTERY CURRENT SENSOR) connector.

3. CHECK HV battery junction block  .
   1. Replace HV battery junction block. Ref. to HYBRID ELECTRIC VEHICLE>RELAY AND FUSE .
   2. Restore the vehicle to its original state.
   3. Using the Subaru Select Monitor, perform the clear memory of [P-HEV Hybrid Powertrain Control]. Ref. to COMMON (DIAG)>CLEAR MEMORY .
   4. Turn to READY ON.
   5. Using the Subaru Select Monitor, drive the vehicle in town about 10 minutes while referring to [Vehicle Speed], [Accelerator Position], [Hybrid Battery Current], [Motor Torque] and [Generator Torque] of the Freeze Frame Data.
   6. Read the DTC of [P-HEV Hybrid Powertrain Control] using the Subaru Select Monitor. Ref. to P-HEV HYBRID POWERTRAIN CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

   Is DTC P0ABF00 displayed?

   Yes  : Replace Battery ECU assembly. Ref. to HYBRID ELECTRIC VEHICLE>BATTERY CONTROL MODULE .

   No  : There was something wrong with HV battery junction block.

   Finish the diagnosis.