HYBRID CONTROL SYSTEM, Diagnostic DTC:P0B231C

DTC Code DTC Name
P0B231C Hybrid/EV Battery "A" Voltage Sensor Voltage Out of Range

DTC SUMMARY


  1. MALFUNCTION DESCRIPTION

    The hybrid vehicle control ECU assembly detects a VB sensor malfunction.

    The cause of this malfunction may be one of the following:


      Battery ECU assembly VB sensor internal circuit malfunction

    • Battery ECU assembly malfunction

    • Communication (wire harness) malfunction


      High voltage system malfunction

    • HV battery malfunction

DESCRIPTION

The battery ECU assembly sends HV battery voltage information to the hybrid vehicle control ECU assembly via CAN communication.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P0B231C Hybrid/EV Battery "A" Voltage Sensor Voltage Out of Range

Battery ECU assembly malfunction:

When not boosting, difference between "Hybrid Battery Voltage" and "VL-Voltage before Boosting" is large and difference between "Hybrid Battery Voltage" and "VH-Voltage after Boosting" is large.

(1 trip detection logic)

 Battery ECU assembly Comes on

Master Warning Light:

Comes on
Related Data List
DTC No. Data List
P0B231C

  • Hybrid Battery Voltage

  • VL-Voltage before Boosting

  • VH-Voltage after Boosting

  • Boost Ratio

CONFIRMATION DRIVING PATTERN

Tech Tips

After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

Click here


  1. Connect the GTS to the DLC3.

  2. Turn the power switch on (IG) and turn the GTS on.

  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

  4. Turn the power switch off and wait for 2 minutes or more.

  5. Turn the power switch on (IG) and turn the GTS on.

  6. Turn the power switch on (READY).

  7. With the shift lever in D, depress both the accelerator pedal and brake pedal at the same time to raise the "Hybrid Battery SOC" to a sufficient level.

  8. Move the shift lever to P, check that the engine is stopped and move the shift lever to N.

  9. Set the A/C for maximum cooling.

  10. Leave the vehicle for a few minutes.

    Tech Tips

    After the repair if "VL-Voltage before Boosting" and the "Hybrid Battery Voltage" are approximately the same when the power switch is turned on (READY) with park (P) selected and the accelerator pedal not depressed, the condition is judged as normal.

  11. Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.

  12. Check the DTC judgment result.

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

    • If the judgment result shows INCOMPLETE or N/A, perform the normal judgment procedure again.

CAUTION / NOTICE / HINT

Note

Performing the check procedures for a long time with neutral (N) selected may cause DTC P300000 to be set.

Tech Tips


  • If the battery ECU assembly has been replaced, it is necessary to confirm the voltage of each battery block. With power switch on (READY), park (P) selected, the engine stopped and the HV battery voltage 226.8 V or more, check the value of Data List items "Hybrid Battery Voltage", "VL-Voltage before Boosting" and "VH-Voltage after Boosting". When the system is normal, the values of "Hybrid Battery Voltage", "VL-Voltage before Boosting", and "VH-Voltage after Boosting" should be almost equal. If the difference between each value is more than the voltages specified below, the system is malfunctioning.

    Inspection Voltage Maximum Voltage Difference
    Difference between "Hybrid Battery Voltage" and "VL-Voltage before Boosting" 26 V
    Difference between "Hybrid Battery Voltage" and "VH-Voltage after Boosting" 26 V
    Difference between "VL-Voltage before Boosting" and "VH-Voltage after Boosting" 41 V

PROCEDURE


  1. CHECK DTC OUTPUT (HYBRID CONTROL, MOTOR GENERATOR, HV BATTERY)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control, Motor Generator, 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
      P0B231C 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 P0A1B49 Drive Motor "A" Control Module Internal Electronic Failure
      P060647 Hybrid/EV Powertrain Control Module Processor Watchdog / Safety MCU Failure
      P060B49 Hybrid/EV Powertrain Control Module A/D Processing Internal Electronic Failure
      P060687 Hybrid/EV Powertrain Control Module Processor to Monitoring Processor Missing Message
      P060A47 Hybrid/EV Powertrain Control Module Monitoring Processor Watchdog / Safety MCU Failure
      P060A87 Hybrid/EV Powertrain Control Module Processor from Monitoring Processor Missing Message
      Motor generator control system P0A1B1F Generator Control Module Circuit Intermittent
      P0A1A47 Generator Control Module Watchdog / Safety μC Failure
      P0A1A49 Generator Control Module Internal Electronic Failure
      P1C2A1C Generator A/D Converter Circuit Circuit Voltage Out of Range
      P1C2A49 Generator A/D Converter Circuit Internal Electronic Failure
      P313383 Communication Error from Generator to Drive Motor "A" Value of Signal Protection Calculation Incorrect
      P313386 Communication Error from Generator to Drive Motor "A" Signal Invalid
      P313387 Communication Error from Generator to Drive Motor "A" Missing Message
      Hybrid battery system P060B49 Hybrid/EV Battery Energy Control Module A/D Processing Internal Electronic Failure
      P060687 Hybrid/EV Battery Energy Control Module Processor to Monitoring Processor Missing Message
      P060A47 Hybrid/EV Battery Energy Control Module Monitoring Processor Watchdog / Safety MCU Failure
      P060A87 Hybrid/EV Battery Energy Control Module Processor from Monitoring Processor Missing Message
      P060B16 Hybrid/EV Battery Energy Control Module A/D Processing Circuit Voltage Below Threshold
      P0E2D00 Hybrid/EV Battery Energy Control Module Hybrid/EV Battery Monitor Performance
      Power source circuit malfunction Motor generator control system P06D61C Generator Control Module Offset Power Circuit Voltage Out of Range
      Communication system malfunction Hybrid control system P312387 Lost Communication with Drive Motor Control Module "A" from Hybrid/EV Control Module Missing Message
      U011187 Lost Communication with Hybrid/EV Battery Energy Control Module "A" Missing Message
      Sensor and actuator circuit malfunction Hybrid battery system P301A1C Hybrid Battery Stack 1 Cell Voltage Detection Voltage Out of Range
      P1A001C Hybrid Battery Stack 2 Cell Voltage Detection Voltage Out of Range
      P1AFD1C Flying Capacitor/Internal Control Module Hybrid/EV Battery Monitor Voltage Out of Range
      System malfunction Motor generator control system P0D2D16 Drive Motor "A" Inverter Voltage Sensor (VH) Circuit Voltage Below Threshold
      P0D2D17 Drive Motor "A" Inverter Voltage Sensor (VH) Circuit Voltage Above Threshold
      P0E3116 DC/DC Converter Voltage Sensor "A" (VL) Circuit Voltage Below Threshold
      P0E3117 DC/DC Converter Voltage Sensor "A" (VL) Circuit Voltage Above Threshold

      Tech Tips


      • P0B231C 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.


    A

    REPLACE BATTERY ECU ASSEMBLY Click here

    B

    GO TO DTC CHART (HYBRID CONTROL SYSTEM) Click here

    C

    GO TO DTC CHART (MOTOR GENERATOR CONTROL SYSTEM) Click here

    D

    GO TO DTC CHART (HYBRID BATTERY SYSTEM) Click here