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Home >> Lexus >> 2024 >> TX 350 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 82 (Hybrid Control System - Diagnostic Codes (3 Of 5)) >> HYBRID CONTROL SYSTEM (for 1Motor-HEV Model) >> DTC P0C30-00: Hybrid/EV Battery State of Charge High [09/2023 - ] >> Procedure

DTC P0C30-00: Hybrid/EV Battery State of Charge High [09/2023 - ]: Procedure

WARNING: This page is about a different car, the 2024 Lexus TX 500h. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK DTC OUTPUT (HYBRID CONTROL) 

    Pre-procedure1

    • None.
    • Check for DTCs.

      Powertrain > Hybrid Control > Trouble Codes 

      Result

      Result Proceed to
      Only P0C30-00 is output A
      P0C30-00 and other DTCs are output B

    Post-procedure1

    • Turn the ignition switch off.

    Result: 

    B 

    GO TO DTC CHART (HYBRID CONTROL SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [09/2023 - ] 

    Result: 

    A 

    See step  2

  2. CHECK BATTERY VOLTAGE SENSOR (IGCT VOLTAGE) 

    Refer to PROCEDURE - Step 2

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY VOLTAGE SENSOR POWER SOURCE CIRCUIT) 

    Result: 

    OK 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (BATTERY VOLTAGE SENSOR - NO. 1 TRACTION BATTERY DEVICE BOX) 

    Refer to PROCEDURE - Step 3

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE HV BATTERY. Refer to  REMOVAL [09/2023 - ] 

    Result: 

    OK 

    See step  4

  4. CHECK BATTERY VOLTAGE SENSOR (VIB VOLTAGE) 

    Refer to PROCEDURE - Step 4

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    See step  7

    Result: 

    OK 

    See step  5

  5. CHECK BATTERY VOLTAGE SENSOR (GIB - GND) 

    Refer to PROCEDURE - Step 5

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE NO. 1 TRACTION BATTERY DEVICE BOX. Refer to  REMOVAL [09/2023 - ] 

    Result: 

    OK 

    See step  6

  6. CHECK HYBRID VEHICLE CONTROL ECU ASSEMBLY (HYBRID/EV BATTERY CURRENT) 

    Pre-procedure1

    • Turn the ignition switch to ON.
      NOTE:

      During the inspection, make sure to only turn the ignition switch to ON. Do not turn the ignition switch to ON (READY).

    • With the ignition switch ON, monitor Data List item "Hybrid/EV Battery Current" and "Hybrid/EV Battery Current for Hybrid/EV Battery Control" for 1 minute.

      Powertrain > Hybrid Control > Data List 

      Tester Display
      Hybrid/EV Battery Current
      Hybrid/EV Battery Current for Hybrid/EV Battery Control

      Result

      Result  Proceed to
      The value of Data List item "Hybrid/EV Battery Current" or "Hybrid/EV Battery Current for Hybrid/EV Battery Control" is -0.5 A or less or 0.5 A or more. A
      Other than above B

    Post-procedure1

    • Turn the ignition switch off.

    Result: 

    A 

    REPLACE BATTERY VOLTAGE SENSOR. Refer to  REMOVAL [09/2023 - ] 

    Result: 

    B 

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY. Refer to  REMOVAL [09/2023 - 12/2023]  , or refer to  REMOVAL [12/2023 - ] 

  7. CHECK BATTERY VOLTAGE SENSOR (VIB VOLTAGE) 

    Refer to PROCEDURE - Step 9

    Result

    Proceed to
    OK
    NG

    Result: 

    OK 

    REPLACE NO. 1 TRACTION BATTERY DEVICE BOX. Refer to  REMOVAL [09/2023 - ] 

    Result: 

    NG 

    REPLACE BATTERY VOLTAGE SENSOR. Refer to  REMOVAL [09/2023 - ] 

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