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Home >> Lexus >> 2024 >> TX 350 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 71 (Plug-In Charge Control System - Diagnostic Codes (3 Of 3) & Symptom Tests) >> PLUG-IN CHARGE CONTROL SYSTEM (for PHEV Model) >> AC Charging Time is Too Long [12/2023 - ] >> Procedure

AC Charging Time is Too Long [12/2023 - ]: Procedure

WARNING: This page is about a different car, the 2024 Lexus TX 550h+. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK DTC OUTPUT (HEALTH CHECK) 
    1. Enter the following menus: Health Check.
    2. Check DTCs.

      Result

      Result Proceed to
      No DTCs are output A
      DTCs are output B
    3. Turn the ignition switch off.

    Result: 

    B 

    GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2023 - ] 

    Result: 

    A 

    See step  2

  2. CHECK FOR VEHICLE CONTROL HISTORY (ROB) 
    1. Check for Vehicle Control History (RoB).

      Powertrain > Plug-in Control > Utility 

      Tester Display
      Vehicle Control History (RoB)

      Powertrain > Hybrid Control > Utility 

      Tester Display
      Vehicle Control History (RoB)

      Result

      Result Proceed to
      Vehicle Control History (RoB) not stored A
      Vehicle Control History (RoB) stored B
    2. Turn the ignition switch off.

    Result: 

    B 

    GO TO VEHICLE CONTROL HISTORY (ROB) 

    Result: 

    A 

    See step  3

  3. CHECK PLUG-IN CHARGE STATE (USING A KNOWN GOOD AC POWER SOURCE) 
    NOTE:
    • On the customer's vehicle, perform AC charging using a known good charging cable (electric vehicle charger cable assembly) and a known good AC power source.
    • Use the same power voltage that the customer used to plug-in charge the vehicle.
    1. Enter the following menus: Health Check.
    2. Clear DTCs.
    3. Enter the following menus: Powertrain / Plug-in Control / Utility / Vehicle Control History (RoB).

      Powertrain > Plug-in Control > Utility 

      Tester Display
      Vehicle Control History (RoB)
    4. Clear all Vehicle Control History (RoB) items.
    5. Enter the following menus: Powertrain / Hybrid Control / Utility / Vehicle Control History (RoB).

      Powertrain > Hybrid Control > Utility 

      Tester Display
      Vehicle Control History (RoB)
    6. Clear all Vehicle Control History (RoB) items.
    7. According to the display on the GTS, read the Data List and confirm that the SOC of the HV battery is less than 70%.

      HINT: 

      If the SOC of the HV battery is 70% or more, drive the vehicle in EV mode to discharge the HV battery until the SOC becomes less than 70%.

      Powertrain > Hybrid Control > Data List 

      Tester Display
      Hybrid/EV Battery SOC
    8. Turn the ignition switch off.
    9. Turn the Charge Now on.

      HINT: 

      • If no charge schedule has been registered, the above step is not necessary.
      • Refer to the customization function for how to set "Setting Charge Now to ON".

        Refer to CUSTOMIZE PARAMETERS [12/2023 - ]

    10. On the customer's vehicle, perform AC charging using a known good charging cable (electric vehicle charger cable assembly) and a known good AC power source until the HV battery is fully charged.
    11. Enter the following menus: Health Check.
    12. Check DTCs.
    13. Check for Vehicle Control History (RoB).

      Powertrain > Plug-in Control > Utility 

      Tester Display
      Vehicle Control History (RoB)

      Powertrain > Hybrid Control > Utility 

      Tester Display
      Vehicle Control History (RoB)

      Result

      Result Proceed to
      DTCs output A
      Vehicle Control History (RoB) stored B
      DTCs and Vehicle Control History (RoB) not stored and plug-in charging time is too long. C
      DTCs and Vehicle Control History (RoB) not stored and plug-in charging time is not longer than normal D
    14. Turn the ignition switch off.
    15. Disconnect the charging cable (electric vehicle charger cable assembly).

    Result: 

    A 

    GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2023 - ] 

    Result: 

    B 

    GO TO VEHICLE CONTROL HISTORY (ROB) 

    Result: 

    C 

    CAUSE ANALYSIS (VEHICLE RELATED CAUSE) 

    1. Analyze the cause according to the following table.
      VEHICLE RELATED CAUSE

      Possible Cause Action to be Taken
      Discharged auxiliary battery Inspect auxiliary battery
      Refer to ON-VEHICLE INSPECTION [12/2023 - ]
      Accuracy of charging time remaining display Explain to the customer that the charging time remaining display should be used as a reference only and that discrepancies may occur due to factors such as the temperature of the HV supply battery assenbly during plug-in charging.
    2. Take appropriate action in accordance with the result of the cause analysis.

    Result: 

    D 

    See step  4

  4. CHECK PLUG-IN CHARGE STATE (USING THE ELECTRIC VEHICLE CHARGER CABLE ASSEMBLY PROVIDED WITH THE VEHICLE) 
    NOTE:
    • On a known good vehicle, perform AC charging using the customer's electric vehicle charger cable assembly and a known good AC power source.
    • Use the same power voltage that the customer used to plug-in charge the vehicle.
    • Check that power supply plug is securely and fully inserted into electrical outlet.
    1. On a known good vehicle, perform AC charging using the customer's electric vehicle charger cable assembly and a known good AC power source.
    2. Check for Vehicle Control History (RoB).

      Powertrain > Plug-in Control > Utility 

      Tester Display
      Vehicle Control History (RoB)

      Powertrain > Hybrid Control > Utility 

      Tester Display
      Vehicle Control History (RoB)

      Result

      Result Proceed to
      Vehicle Control History (RoB) stored A
      Vehicle Control History (RoB) not stored and AC charging suspended B
      Vehicle Control History (RoB) not stored and AC charging not suspended C
    3. Disconnect the electric vehicle charger cable assembly.

    Result: 

    A 

    GO TO VEHICLE CONTROL HISTORY (ROB) 

    Result: 

    B 

    CAUSE ANALYSIS (CHARGING CABLE RELATED CAUSE) 

    1. Analyze the cause according to the following table.
      CHARGING CABLE RELATED CAUSE

      Possible Cause Action to be Taken
      Power supply plug overheating protection function operated Inspect charging cable (electric vehicle charger cable assembly)
      Refer to ON-VEHICLE INSPECTION [12/2023 - ]
      Refer to INSPECTION [12/2023 - ]
      1. Check that power supply plug is securely and fully inserted into electrical outlet.
    2. Take appropriate action in accordance with the result of the cause analysis.

    Result: 

    C 

    CAUSE ANALYSIS (USER / ENVIRONMENT / EXTERNAL POWER SOURCE/CHARGING STAND RELATED CAUSE) 

    1. Perform cause analysis in the order of "User Related Cause", "Environment Related Cause" and "External Power Source/Charging Stand Related Cause" categories as specified in the following tables below.
      USER RELATED CAUSE

      Possible Cause Action to be Taken
      Power supply plug was not securely and fully inserted into electrical outlet Explain to the customer that if the electrical contact between the power supply plug and the electrical outlet is unstable, the electric vehicle charger cable assembly may restrict the charging current and cause charging time to become longer.
      Charging current was changed Explain to the customer that if the charging current is changed to 8 A or 16 A through the customize setting on the multimedia display, the charging time will increase.
      Refer to CUSTOMIZE PARAMETERS [12/2023 - ]
      Auxiliary power consumption was high due to headlights being left on, use of accessories, etc. Explain to the customer that if the auxiliary power consumption is high, plug-in charging will take longer than normal.
      Doors were unlocked during charging Explain to the customer that unlocking the doors during charging will cause the charging current to be restricted and thus cause charging time to become longer.
      ENVIRONMENT RELATED CAUSE

      Possible Cause Action to be Taken
      Charging power drops or estimated charging completion time changes due to ambient temperature or HV battery temperature Explain to the customer that if the temperature of the HV supply battery assembly is changing, plug-in charging will take longer than normal.
      1. When the outside temperature is low, plug-in charging may take longer than normal due to the HV battery heater operation in order to ensure the EV driving distance.
      EXTERNAL POWER SOURCE/CHARGING STAND RELATED CAUSE

      Possible Cause Action to be Taken
      Supplied power was low due to charging station AC voltage drop Interview customer and check the charging station.
      Refer to PROBLEM SYMPTOMS TABLE [12/2023 - ]
      1. Explain to the customer that plug-in charging may take longer than normal if the supplied AC voltage is low.
      Supplied power was low due charging station control Interview customer and check the charging station.
      Refer to PROBLEM SYMPTOMS TABLE [12/2023 - ]
      1. Plug-in charging may take longer than normal if the charging station has an electrical power management function. Refer to the user's manual for the charging station.
      Plug-in charging was suspended due to power outage Explain to the customer that plug-in charging is suspended when a power outage occurs and will resume when the power returns to normal.
      Charge control power drops due to abnormal electrical outlet voltage Interview customer and check the electrical outlet.
      Refer to PROBLEM SYMPTOMS TABLE [12/2023 - ]
      1. An abnormality in the voltage of the electrical outlet or the ground wire connection may cause the electric vehicle charger cable assembly to restrict the charging current and thus cause charging time to increase. In this situation, the electrical outlet should be checked by a qualified electrician.
      Power supply plug overheating protection function operated Interview customer and check the electrical outlet.
      Refer to PROBLEM SYMPTOMS TABLE [12/2023 - ]
      1. Check that power supply plug is securely and fully inserted into electrical outlet.
    2. Take appropriate action in accordance with the result of the cause analysis.
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