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Home >> Subaru >> 2021 >> Crosstrek Sport >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 26 (P-HEV Hybrid Powertrain Control System (Diagnostics) (3 Of 4)) >> Diagnostic Procedure With Diagnostic Trouble Code (DTC) >> DTC P1AC4-13: Hybrid/EV Battery Stack 1 Current Interrupt Device Circuit Open >> Notes

DTC P1AC4-13: Hybrid/EV Battery Stack 1 Current Interrupt Device Circuit Open: Notes

WARNING: This page is about a different variant/trim than selected.
  1. - 

    Outline of diagnosis: 

    While the CID in HV battery is READY ON for operation, the voltage before boosting is stuck outside the battery voltage range, or the cell voltage decrease information from Battery ECU assembly is received with the cumulative value of variation amount in the voltage before boosting for a predetermined period of time large

    (1 trip detection logic)

    Trouble symptom: 

    • Reduced output power
    • Engine not stopped

      Or,

    • Hybrid system stopped
    CAUTION:
  1. CHECK DTC  .

    Read the DTC of [P-HEV High Voltage Battery] using the Subaru Select Monitor. Ref. to P-HEV HIGH VOLTAGE BATTERY (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

    NOTE:
    Malfunction contents System Related DTC
    System malfunction P-HEV High Voltage Battery P1AC4-13 HYBRID/EV BATTERY STACK 1 CURRENT INTERRUPT DEVICE CIRCUIT OPEN
    P1AC4-9E HYBRID/EV BATTERY STACK 1 CURRENT INTERRUPT DEVICE STUCK ON
    P1AC5-13 HYBRID/EV BATTERY STACK 2 CURRENT INTERRUPT DEVICE CIRCUIT OPEN
    P1AC5-9E HYBRID/EV BATTERY STACK 2 CURRENT INTERRUPT DEVICE STUCK ON
    P1AC6-13 HYBRID/EV BATTERY STACK 3 CURRENT INTERRUPT DEVICE CIRCUIT OPEN
    P1AC6-9E HYBRID/EV BATTERY STACK 3 CURRENT INTERRUPT DEVICE STUCK ON
    P1AC7-13 HYBRID/EV BATTERY STACK 4 CURRENT INTERRUPT DEVICE CIRCUIT OPEN
    P1AC7-9E HYBRID/EV BATTERY STACK 4 CURRENT INTERRUPT DEVICE STUCK ON
    P1AC8-13 HYBRID/EV BATTERY STACK 5 CURRENT INTERRUPT DEVICE CIRCUIT OPEN
    P1AC8-9E HYBRID/EV BATTERY STACK 5 CURRENT INTERRUPT DEVICE STUCK ON

    DTC P1AC4-13 may be output simultaneously due to the fault that DTC above describes.
    • The table above shows inspections in the order of priority.
    • Check DTC output simultaneously in the order described. (This allows you to identify the main cause without performing unnecessary inspections.)

    When "Only DTC P1AC4-13 is displayed" or "DTC other than above is displayed", go to  A. When DTCs related to [P-HEV High Voltage Battery] mentioned above are simultaneously displayed, go to  B.

    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.

    No: 

    -

  2. 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) . Ref. to P-HEV HIGH VOLTAGE BATTERY (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) . Ref. to PLUG-IN BATTERY CHARGER (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

    • P-HEV Hybrid Powertrain Control
    • P-HEV Drive Motor
    • P-HEV High Voltage Battery
    • Plug-in Battery Charger
    NOTE:
    Malfunction contents System Related DTC
    Microcomputer malfunction P-HEV Hybrid Powertrain Control P0606-47 HYBRID/EV POWERTRAIN CONTROL MODULE PROCESSOR WATCHDOG/SAFETY MCU FAILURE
    P0A1B-49 DRIVE MOTOR "A" CONTROL MODULE INTERNAL ELECTRONIC FAILURE
    P-HEV Drive Motor P0A1A-47 GENERATOR CONTROL MODULE WATCHDOG/SAFETY MC FAILURE
    P0A1A-49 GENERATOR CONTROL MODULE INTERNAL ELECTRONIC FAILURE
    P0A1B-1F GENERATOR CONTROL MODULE CIRCUIT INTERMITTENT
    P1C2A-1C GENERATOR A/D CONVERTER CIRCUIT CIRCUIT VOLTAGE OUT OF RANGE
    P1C2A-49 GENERATOR A/D CONVERTER CIRCUIT INTERNAL ELECTRONIC FAILURE
    P3133-83 COMMUNICATION ERROR FROM GENERATOR TO DRIVE MOTOR "A" VALUE OF SIGNAL PROTECTION CALCULATION INCORRECT
    P3133-86 COMMUNICATION ERROR FROM GENERATOR TO DRIVE MOTOR "A" SIGNAL INVALID
    P-HEV High Voltage Battery P060A-47 HYBRID/EV BATTERY ENERGY CONTROL MODULE MONITORING PROCESSOR WATCHDOG/SAFETY MCU FAILURE
    P060B-16 HYBRID/EV BATTERY ENERGY CONTROL MODULE A/D PROCESSING CIRCUIT VOLTAGE BELOW THRESHOLD
    P060B-49 HYBRID/EV BATTERY ENERGY CONTROL MODULE A/D PROCESSING INTERNAL ELECTRONIC FAILURE
    Plug-in Battery Charger P060B-49 PLUG-IN CONTROL MODULE A/D PROCESSING INTERNAL ELECTRONIC FAILURE
    P1C1F-49 HYBRID/EV BATTERY CHARGER CONTROL MODULE A/D PROCESSING INTERNAL ELECTRONIC FAILURE
    Power supply system malfunction P-HEV Drive Motor P06D6-1C GENERATOR CONTROL MODULE OFFSET POWER CIRCUIT VOLTAGE OUT OF RANGE
    P-HEV High Voltage Battery P1CBB-12 HYBRID/EV BATTERY CURRENT SENSOR POWER SUPPLY CIRCUIT SHORT TO AUXILIARY BATTERY
    P1CBB-14 HYBRID/EV BATTERY CURRENT SENSOR POWER SUPPLY CIRCUIT SHORT TO GROUND OR OPEN
    Plug-in Battery Charger P1CED-1C PLUG-IN CONTROL ECU POWER SUPPLY (+12.5V) CIRCUIT VOLTAGE OUT OF RANGE
    Communication system malfunction P-HEV Hybrid Powertrain Control P3123-87 LOST COMMUNICATION WITH DRIVE MOTOR CONTROL MODULE "A" FROM HYBRID/EV CONTROL MODULE MISSING MESSAGE
    U0111-87 LOST COMMUNICATION WITH HYBRID/EV BATTERY ENERGY CONTROL MODULE "A" MISSING MESSAGE
    U019B-87 LOST COMMUNICATION WITH HYBRID/EV BATTERY CHARGER CONTROL MODULE MISSING MESSAGE
    P-HEV Drive Motor P3133-87 COMMUNICATION ERROR FROM GENERATOR TO DRIVE MOTOR "A" MISSING MESSAGE
    P-HEV High Voltage Battery P0606-87 HYBRID/EV BATTERY ENERGY CONTROL MODULE PROCESSOR TO MONITORING PROCESSOR MISSING MESSAGE
    P060A-87 HYBRID/EV BATTERY ENERGY CONTROL MODULE PROCESSOR FROM MONITORING PROCESSOR MISSING MESSAGE
    Plug-in Battery Charger P0E5E-87 PLUG-IN CONTROL MODULE PROCESSOR FROM HYBRID/EV BATTERY CHARGER CONTROL MODULE PROCESSOR MISSING MESSAGE
    U0293-87 LOST COMMUNICATION WITH HYBRID POWERTRAIN CONTROL MODULE MISSING MESSAGE
    U1150-87 LOST COMMUNICATION WITH HYBRID POWERTRAIN CONTROL MODULE(HYBRID/EV BATTERY LOCAL BUS) MISSING MESSAGE
    Sensor and actuator circuit malfunction P-HEV Drive Motor P0D2D-16 DRIVE MOTOR "A" INVERTER VOLTAGE SENSOR(VH) CIRCUIT VOLTAGE BELOW THRESHOLD
    P0D2D-17 DRIVE MOTOR "A" INVERTER VOLTAGE SENSOR(VH) CIRCUIT VOLTAGE ABOVE THRESHOLD
    P-HEV High Voltage Battery P0ABF-11 HYBRID/EV BATTERY CURRENT SENSOR "A" CIRCUIT SHORT TO GROUND
    P0ABF-15 HYBRID/EV BATTERY CURRENT SENSOR "A" CIRCUIT SHORT TO AUXILIARY BATTERY OR OPEN
    P0ABF-28 HYBRID/EV BATTERY CURRENT SENSOR "A" SIGNAL BIAS LEVEL OUT OF RANGE/ZERO ADJUSTMENT FAILURE
    P0ABF-2A HYBRID/EV BATTERY CURRENT SENSOR "A" SIGNAL STUCK IN RANGE
    P0B0E-11 HYBRID/EV BATTERY CURRENT SENSOR "B" CIRCUIT SHORT TO GROUND
    P0B0E-15 HYBRID/EV BATTERY CURRENT SENSOR "B" CIRCUIT SHORT TO AUXILIARY BATTERY OR OPEN
    P0B13-62 HYBRID/EV BATTERY CURRENT SENSOR "A"/"B" SIGNAL COMPARE FAILURE
    Plug-in Battery Charger P0D4C-12 HYBRID/EV BATTERY CHARGER HYBRID/EV BATTERY INPUT VOLTAGE SENSOR CIRCUIT SHORT TO AUXILIARY BATTERY
    P0D4C-14 HYBRID/EV BATTERY CHARGER HYBRID/EV BATTERY INPUT VOLTAGE SENSOR CIRCUIT SHORT TO GROUND OR OPEN
    System malfunction P-HEV Hybrid Powertrain Control P0A1F-94 HYBRID/EV BATTERY ENERGY CONTROL MODULE UNEXPECTED OPERATION
    P0ABF-00 HYBRID/EV BATTERY CURRENT SENSOR "A" CIRCUIT RANGE/PERFORMANCE
    P0D2D-1C DRIVE MOTOR "A" INVERTER VOLTAGE SENSOR VOLTAGE OUT OF RANGE
    P0D4C-1C HYBRID/EV BATTERY CHARGER HYBRID/EV BATTERY INPUT VOLTAGE SENSOR VOLTAGE OUT OF RANGE
    P0E31-1C BOOSTING CONVERTER VOLTAGE SENSOR "A" VOLTAGE OUT OF RANGE
    P1C2D-62 HYBRID/EV BATTERY "A" VOLTAGE SENSOR/BOOSTING CONVERTER VOLTAGE SENSOR "A" SIGNAL COMPARE FAILURE
    P1C83-49 HIGH VOLTAGE POWER RESOURCE CIRCUIT VOLTAGE SENSOR AFTER BOOSTING MALFUNCTION
    P-HEV Drive Motor P0CA3-00 DC/DC CONVERTER STEP UP VOLTAGE PERFORMANCE
    P1CB6-9E DRIVE MOTOR "A" INVERTER VOLTAGE SENSOR(VH) STUCK ON

    DTC P1AC4-13 may be output simultaneously due to the fault that DTC above describes.
    • The table above shows inspections in the order of priority.
    • Check DTC output simultaneously in the order described. (This allows you to identify the main cause without performing unnecessary inspections.)

    When "Only DTC P1AC4-13 is displayed" or "DTC other than above is displayed", 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.

    When DTCs related to [P-HEV High Voltage Battery] mentioned above are simultaneously displayed, go to  D.

    When DTCs related to [Plug-in Battery Charger] mentioned above are simultaneously displayed, go to  E.

    Yes: 

    1. Go to  3.
    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.
    4. 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.
    5. 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: 

    -

  3. CHECK DTC  .
    1. Replace Battery ECU assembly. Ref. to HYBRID ELECTRIC VEHICLE>BATTERY CONTROL MODULE .
    2. Using the Subaru Select Monitor, perform the clear memory of [P-HEV Hybrid Powertrain Control]. Ref. to COMMON (DIAG)>CLEAR MEMORY .
    3. Turn to IG OFF, and wait for two minutes or more.
    4. Turn to IG ON, and wait for 30 seconds or more.
      NOTE: Never turn to READY ON, because turning to READY ON before the repair is completed may cause fault.
    5. Read the DTC of [P-HEV High Voltage Battery] using the Subaru Select Monitor. Ref. to P-HEV HIGH VOLTAGE BATTERY (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

    Are any DTCs displayed?

    Yes: 

    Perform the diagnosis for the displayed DTCs.

    No: 

    There was something wrong with Battery ECU assembly.

    Finish the diagnosis.

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