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Home >> Toyota >> 2020 >> Corolla L >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 60 (Hybrid Control System (NI-MH) - Diagnostic Codes (3 Of 5)) >> HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY) >> DTC P0C30-00: Hybrid/EV Battery State of Charge High [01/2019 - 09/2022] >> Procedure

DTC P0C30-00: Hybrid/EV Battery State of Charge High [01/2019 - 09/2022]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK DTC OUTPUT (HYBRID CONTROL) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
    4. Check for DTCs.

      Powertrain > Hybrid Control > Trouble Codes 

      Result

      Result  Proceed to
      P0C30-00 only is output.  A
      DTCs except P0C30-00 are output.  B
    5. Turn the power switch off.

    Result: 

    B 

    GO TO DTC CHART (HYBRID CONTROL SYSTEM) 

    Refer to DIAGNOSTIC TROUBLE CODE CHART [01/2019 - 04/2020] , or refer to DIAGNOSTIC TROUBLE CODE CHART [04/2020 - 09/2022]

    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 - HV BATTERY JUNCTION BLOCK ASSEMBLY) 

    Refer to PROCEDURE - Step 3

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE HYBRID BATTERY THERMISTOR 

    Refer to REMOVAL [01/2019 - 09/2022]

    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 HV BATTERY JUNCTION BLOCK ASSEMBLY 

    Refer to REMOVAL [01/2019 - 09/2022]

    Result: 

    OK 

    See step  6

  6. CHECK HYBRID VEHICLE CONTROL ECU (HYBRID BATTERY CURRENT) 
    1. Connect the GTS to the DLC3.
    2. Turn the power switch on (IG).
      NOTE:

      During the inspection, make sure to only turn the power switch on (IG). Do not turn the power switch on (READY).

    3. Enter the following menus: Powertrain / Hybrid Control / Data List / Hybrid/EV Battery Current, Hybrid/EV Battery Current for Hybrid/EV Battery Control.

      Powertrain > Hybrid Control > Data List 

      Tester Display
      Hybrid/EV Battery Current
      Hybrid/EV Battery Current for Hybrid/EV Battery Control
    4. With the power switch on (IG), monitor Data List item "Hybrid/EV Battery Current" and "Hybrid/EV Battery Current for Hybrid/EV Battery Control" for 1 minute.

      Result

      Result  Proceed to
      The value of Data List item "Hybrid/EV Battery Current" and "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
    5. Turn the power switch off.

    Result: 

    A 

    REPLACE BATTERY VOLTAGE SENSOR 

    Refer to REMOVAL [01/2019 - 09/2022]

    Result: 

    B 

    REPLACE HYBRID VEHICLE CONTROL ECU 

    Refer to REMOVAL [01/2019 - 04/2020] , or refer to REMOVAL [04/2020 - 09/2022]

  7. CHECK BATTERY VOLTAGE SENSOR (VIB VOLTAGE) 

    Refer to PROCEDURE - Step 9

    Result

    Proceed to
    OK
    NG

    Result: 

    OK 

    REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY 

    Refer to REMOVAL [01/2019 - 09/2022]

    Result: 

    NG 

    REPLACE BATTERY VOLTAGE SENSOR 

    Refer to REMOVAL [01/2019 - 09/2022]

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