DTC P0BFD-62: Drive Motor "A" Phase U-V-W Current Sensor Signal Compare Failure: Notes

1. - 

Detecting condition: 

Motor inverter current sensor property malfunction

When the total value of UVW-phase sensor outputs deviates from the proper value, it is detected as abnormal.

(Normally, the total of inverter current sensor UVW-phase output values is about 0.)

(1 trip detection logic)

Trouble symptom: 

• Greatly reduced output power
• Driving in reverse not possible
• A driving range is limited
• Engine used while driving and engine speed becomes high

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK DTC  .

   Read the following DTCs using Subaru Select Monitor. Ref. to P-HEV HYBRID POWERTRAIN CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) . Ref. to P-HEV DRIVE MOTOR (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

   • P-HEV Hybrid Powertrain Control
   • P-HEV Drive Motor
   NOTE:

   Malfunction contents	System	Related DTC
   Insulation malfunction	P-HEV Hybrid Powertrain Control	P1C7C49	HYBRID/EV BATTERY VOLTAGE SYSTEM ISOLATION (A/C AREA) INTERNAL ELECTRONIC FAILURE
   		P1C7D49	HYBRID/EV BATTERY VOLTAGE SYSTEM ISOLATION (HYBRID/EV BATTERY AREA) INTERNAL ELECTRONIC FAILURE
   		P1C7E49	HYBRID/EV BATTERY VOLTAGE SYSTEM ISOLATION (TRANSAXLE AREA) INTERNAL ELECTRONIC FAILURE
   		P1C7F49	HYBRID/EV BATTERY VOLTAGE SYSTEM ISOLATION (DIRECT CURRENT AREA) INTERNAL ELECTRONIC FAILURE
   High voltage system failure	P-HEV Hybrid Powertrain Control	P0AA649	HYBRID/EV BATTERY VOLTAGE SYSTEM ISOLATION INTERNAL ELECTRONIC FAILURE
   Microcomputer malfunction	P-HEV Hybrid Powertrain Control	P0A1B49	DRIVE MOTOR "A" CONTROL MODULE INTERNAL ELECTRONIC FAILURE
   	P-HEV Drive Motor	P1C2B1C	DRIVE MOTOR "A" CONTROL MODULE A/D CONVERTER CIRCUIT VOLTAGE OUT OF RANGE
   		P1C2B49	DRIVE MOTOR "A" CONTROL MODULE A/D CONVERTER CIRCUIT INTERNAL ELECTRONIC FAILURE
   		P312487	LOST COMMUNICATION BETWEEN DRIVE MOTOR "A" AND HV ECU MISSING MESSAGE
   Power supply system malfunction	P-HEV Drive Motor	P06B01C	GENERATOR CONTROL MODULE POSITION SENSOR REF POWER SOURCE CIRCUIT VOLTAGE OUT OF RANGE
   		P06D61C	GENERATOR CONTROL MODULE OFFSET POWER CIRCUIT VOLTAGE OUT OF RANGE
   System malfunction	P-HEV Drive Motor	P0A7873	DRIVE MOTOR "A" INVERTER ACTUATOR STUCK CLOSED

   When "Only DTC P0BFD62 or P1C671F is displayed" or "DTC other than above is displayed at the same time", go to  A.

   When DTCs related to [P-HEV Hybrid Powertrain Control], mentioned above, are simultaneously displayed, go to  B.

   When DTCs related to [P-HEV Drive Motor], mentioned above, are simultaneously displayed, go to  C.

   Yes: 

   1. Go to  2.
   2. Perform the diagnosis for the simultaneously displayed DTCs.
      NOTE: If more than one DTC is simultaneously displayed, perform the diagnosis in the order described in the above.
   3. Perform the diagnosis for the simultaneously displayed DTCs.
   NOTE: If more than one DTC is simultaneously displayed, perform the diagnosis in the order described in the above.

   No:  -

2. CHECK THE CONNECTING CONDITION OF CONNECTOR (Inverter with converter assembly LOW PRESSURE CONNECTOR)  .
   CAUTION: Make sure to wear insulated gloves and protective goggles during the work.
   1. Check that the Service plug is disconnected. Ref. to HYBRID ELECTRIC VEHICLE>SERVICE PLUG .
   2. Check the connecting condition of low pressure connectors (HV23) and (HV24) in Inverter with converter assembly and check the relevant terminals for contact pressure, deformation and intrusion of water or foreign matter. Ref. to HYBRID ELECTRIC VEHICLE>INVERTER AND CONVERTER ASSEMBLY .
   NOTE: When connecting the connector, insert to the end with the lock lever raised, then fold the lock lever completely until a click is heard. After connected, make sure that the lock claw does not loosen and pull the connector to see that it does not come off.

   Is there looseness at the connector connection, or any poor contact, deformation or intrusion of water or foreign matter at the relevant terminals?

   Yes:  Connect the connector securely. Or repair the poor contact of connector.

   No:  Go to  3.

3. CHECK MOTOR HIGH-VOLTAGE CIRCUIT  .

   Check MOTOR HIGH-VOLTAGE CIRCUIT. Ref. to P-HEV HYBRID POWERTRAIN CONTROL (DIAGNOSTICS)>DIAGNOSTICS WITH PHENOMENON>INSPECTION>MOTOR HIGH-VOLTAGE CIRCUIT .

   Is the MOTOR HIGH-VOLTAGE CIRCUIT OK?

   Yes:  Replace Inverter with converter assembly. Ref. to HYBRID ELECTRIC VEHICLE>INVERTER AND CONVERTER ASSEMBLY .

   No:  Repair according to MOTOR HIGH-VOLTAGE CIRCUIT inspection.