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Home >> Lexus >> 2020 >> ES 300h Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 138 (Hybrid Control System (For Lithium-Ion Battery) - Diagnostic Codes (2 Of 4)) >> HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY) >> DTC P1AC4-13: Hybrid/EV Battery Stack 1 Current Interrupt Device Circuit Open [08/2020 - ] >> Procedure

DTC P1AC4-13: Hybrid/EV Battery Stack 1 Current Interrupt Device Circuit Open [08/2020 - ]: Procedure

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  1. CHECK DTC OUTPUT (HYBRID CONTROL, HV BATTERY) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
      NOTE:

      If the DTCs are cleared or the cable is disconnected and reconnected to the negative (-) auxiliary battery terminal before performing repairs, turning the power switch on (READY) may cause a malfunction. Do not turn the power switch on (READY).

    3. Enter the following menus: Powertrain / Hybrid Control, HV Battery / Trouble Codes.
    4. Check for DTCs.

      Powertrain > Hybrid Control > Trouble Codes 

      Powertrain > HV Battery > Trouble Codes 

      Result

      Result Proceed to
      P1AC4-13 only is output, or DTCs except the ones in the table below are also output. A
      DTCs of hybrid battery system in the tables below are output. B
      Malfunction Content System Relevant DTC
      System malfunction Hybrid battery system 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

      HINT: 

      • P1AC4-13 may be output as a result of the malfunction indicated by the DTCs above.
        1. The chart above is listed in inspection order of priority.
        2. Check DTCs that are output at the same time by following the listed order. (The main cause of the malfunction can be determined without performing unnecessary inspections.)
    5. Turn the power switch off.

    Result: 

    B 

    GO TO DTC CHART (HYBRID BATTERY SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2020 - ] 

    Result: 

    A 

    See step  2

  2. CHECK DTC OUTPUT (HYBRID CONTROL, MOTOR GENERATOR AND HV BATTERY) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Enter the following menus: Powertrain / Hybrid Control, Motor Generator and HV Battery / Trouble Codes.
    4. Check for DTCs.

      Powertrain > Hybrid Control > Trouble Codes 

      Powertrain > Motor Generator > Trouble Codes 

      Powertrain > HV Battery > Trouble Codes 

      Result

      Result Proceed to
      P1AC4-13 only is output, or DTCs except the ones in the table below are also output. A
      DTCs of hybrid control system in the tables below are output. B
      DTCs of motor generator control system in the tables below are output. C
      DTCs of hybrid battery system in the tables below are output. D
      Malfunction Content System Relevant DTC
      Microcomputer malfunction Hybrid control system P0606-47 Hybrid/EV Powertrain Control Module Processor Watchdog / Safety MCU Failure
      P0A1B-49 Drive Motor "A" Control Module Internal Electronic Failure
      Motor generator control system 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
      Hybrid battery system 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
      Power source circuit malfunction Motor generator control system P06D6-1C Generator Control Module Offset Power Circuit Voltage Out of Range
      Hybrid battery system 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
      Communication system malfunction Hybrid control system 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
      Motor generator control system P3133-87 Communication Error from Generator to Drive Motor "A" Missing Message
      Hybrid battery system 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
      Sensor and actuator circuit malfunction Motor generator control system 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
      Hybrid battery system 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
      System malfunction Hybrid control system 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
      Motor generator control system P0CA3-00 DC/DC Converter Step Up Voltage Performance
      P1CB6-9E Drive Motor "A" Inverter Voltage Sensor(VH) Stuck On

      HINT: 

      • P1AC4-13 may be output as a result of the malfunction indicated by the DTCs above.
        1. The chart above is listed in inspection order of priority.
        2. Check DTCs that are output at the same time by following the listed order. (The main cause of the malfunction can be determined without performing unnecessary inspections.)
    5. Turn the power switch off.

    Result: 

    B 

    GO TO DTC CHART (HYBRID CONTROL SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2020 - 08/2021]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2021 - ] 

    Result: 

    C 

    GO TO DTC CHART (MOTOR GENERATOR CONTROL SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2020 - 08/2021]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2021 - ] 

    Result: 

    D 

    GO TO DTC CHART (HYBRID BATTERY SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2020 - ] 

    Result: 

    A 

    See step  3

  3. REPLACE BATTERY ECU ASSEMBLY 

    Refer to REMOVAL [08/2020 - 08/2021] , or refer to REMOVAL [08/2021 - 09/2022] , or refer to REMOVAL [09/2022 - ]

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  4

  4. SIMULATION TEST 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG) and turn the Techstream on.
      NOTE:

      Do not turn the power switch on (READY) before completing repairs as this may cause a malfunction.

    3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
    4. Clear the DTCs and freeze frame data.

      Powertrain > Hybrid Control > Clear DTCs 

    5. Turn the power switch off and wait for 2 minutes or more.
    6. Turn the power switch on (IG) and wait for 30 seconds or more.
    7. Enter the following menus: Powertrain / Hybrid Batter / Trouble Codes.
    8. Check if DTCs are output.

      Powertrain > HV Battery > Trouble Codes 

      Result

      Result Proceed to
      No DTCs are output. A
      DTCs of hybrid battery system are output. B
    9. Turn the power switch off.

    Result: 

    A 

    END 

    Result: 

    B 

    GO TO DTC CHART (HYBRID BATTERY SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2020 - ] 

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