LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2024 >> RX 500h >> Repair and Diagnosis >> External Pages >> Different car >> Section 65 (Hybrid Control System - Diagnostic Codes (5 Of 7)) >> HYBRID CONTROL SYSTEM (for PHEV Model) >> DTC P1AC4-13: Hybrid/EV Battery Stack 1 Current Interrupt Device Circuit Open [08/2023 - ] >> Procedure

DTC P1AC4-13: Hybrid/EV Battery Stack 1 Current Interrupt Device Circuit Open [08/2023 - ]: Procedure

WARNING: This page is about a different car, the 2025 Lexus RX 450h+ and 2024 Lexus RX 450h+. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK DTC OUTPUT (HV BATTERY) 

    Pre-procedure1

    1. None.

      Procedure1

    2. Check for DTCs.

      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
      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

      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.)

      Post-procedure1

    3. Turn the ignition switch off.

    Result: 

    B 

    GO TO DTC CHART (HYBRID BATTERY SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2023 - ] 

    Result: 

    A 

    See step  2

  2. CHECK DTC OUTPUT (HYBRID CONTROL, MOTOR GENERATOR, HV BATTERY AND PLUG-IN CONTROL) 

    Pre-procedure1

    1. None.

      Procedure1

    2. Check for DTCs.

      Powertrain > Hybrid Control > Trouble Codes 

      Powertrain > Motor Generator > Trouble Codes 

      Powertrain > HV Battery > Trouble Codes 

      Powertrain > Plug-in Control > 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
      DTCs of plug-in charge control system in the tables below are output. E
      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
      Plug-in charge control system 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 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
      Plug-in charge control system P1CED-1C Plug-in Control ECU Power Supply (+12.5V) Circuit Voltage Out of Range
      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
      U019B-87 Lost Communication with Hybrid/EV Battery Charger Control Module Missing Message
      U0100-87 Lost Communication with ECM/PCM "A" Missing Message
      Motor generator control system P3133-87 Communication Error from Generator to Drive Motor "A" Missing Message
      U0100-87 Lost Communication with ECM/PCM "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
      U0100-87 Lost Communication with ECM/PCM "A" Missing Message
      Plug-in charge control system P0E5E-87 Plug-in Control Module Processor from Hybrid/EV Battery Charger Control Module Processor Missing Message
      U0293-87 Lost Communication with Hybrid/EV Powertrain Control Module Missing Message
      U1150-87 Lost Communication with Hybrid Powertrain Control Module (Hybrid/EV Battery Local Bus) Missing Message
      U0100-87 Lost Communication with ECM/PCM "A" 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
      P2BE4-11 Hybrid/EV Battery Pack Current Sensor "C" Low Circuit Short to Ground
      P2BE4-15 Hybrid/EV Battery Pack Current Sensor "C" High Circuit Short to Auxiliary Battery or Open
      P2BE4-1C Hybrid/EV Battery Pack Current Sensor "C" Circuit Range/Performance Circuit Voltage Out of Range
      P2BE4-28 Hybrid/EV Battery Pack Current Sensor "C" Circuit Range/Performance Signal Bias Level Out of Range / Zero Adjustment Failure
      Plug-in charge control system 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 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
      P1AC4-13 Hybrid/EV Battery Stack 1 Current Interrupt Device Circuit Open
      Motor generator control system P0CA3-00 DC/DC Converter Step Up Voltage Performance
      P1CB6-9E Drive Motor "A" Inverter Voltage Sensor(VH) Stuck On
      Plug-in charge control system P1C26-17 Hybrid/EV Battery Charger Hybrid/EV Battery Input Voltage Sensor Circuit Voltage Above Threshold

      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.)

      Post-procedure1

    3. Turn the ignition switch off.

    Result: 

    B 

    GO TO DTC CHART (HYBRID CONTROL SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2023 - 10/2024]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2024 - ] 

    Result: 

    C 

    GO TO DTC CHART (MOTOR GENERATOR CONTROL SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2023 - ] 

    Result: 

    D 

    GO TO DTC CHART (HYBRID BATTERY SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2023 - ] 

    Result: 

    E 

    GO TO DTC CHART (PLUG-IN CHARGE CONTROL SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2023 - ] 

    Result: 

    A 

    See step  3

  3. REPLACE BATTERY ECU ASSEMBLY 

    HINT: 

    Refer to REMOVAL [08/2023 - ]

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  4

  4. SIMULATION TEST 

    Pre-procedure1

    1. Turn the ignition switch to ON.
      NOTE:

      Do not turn the ignition switch to ON (READY) before completing repairs as this may cause a malfunction.

    2. Clear the DTCs.

      Powertrain > Hybrid Control > Clear DTCs 

    3. Turn the ignition switch off and wait for 2 minutes or more.
    4. Turn the ignition switch to ON and wait for 30 seconds or more.

      Procedure1

    5. 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

      Post-procedure1

    6. Turn the ignition switch off.

    Result: 

    A 

    END 

    Result: 

    B 

    GO TO DTC CHART (HYBRID BATTERY SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2023 - ] 

scientia non olet · About LEMON Manuals