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Home >> Toyota >> 2024 >> Corolla LE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 92 (Hybrid Control System (Li-Ion W/ Pa10) - Diagnostic Codes (2 Of 3)) >> HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY with PA10) >> DTC P1CCC-49: DC/DC Converter Internal Electronic Failure [09/2022 - ] >> Procedure

DTC P1CCC-49: DC/DC Converter Internal Electronic Failure [09/2022 - ]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK FUSE (DC/DC) 

    See step  1

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    See step  15

    Result: 

    OK 

    See step  2

  2. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR) 

    Refer to PROCEDURE - Step 1

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    CONNECT SECURELY 

    Result: 

    OK 

    See step  3

  3. CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR) 

    See step  3

    Result

    Result Proceed to
    OK A
    NG (The connector is not connected securely.) B
    NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) C

    Result: 

    B 

    CONNECT SECURELY 

    Result: 

    C 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    A 

    See step  4

  4. CHECK FUSE (PCU NO. 2) 

    See step  4

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE FUSE (PCU NO. 2) 

    Result: 

    OK 

    See step  5

  5. CHECK HARNESS AND CONNECTOR (DC/DC CONVERTER POWER SOURCE CIRCUIT) 

    See step  5

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE MALFUNCTIONING PARTS 

    Result: 

    OK 

    See step  6

  6. CHECK AMD TERMINAL VOLTAGE 

    See step  6

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  7

  7. CHECK AMD TERMINAL CONNECTION CONDITION 

    See step  7

    Result

    Result Proceed to
    There are no arc marks. The terminal is connected securely and there are no contact problems. A
    There are no arc marks. The terminal is not connected securely and there is a contact problem. B
    There are arc marks. - C

    Result: 

    B 

    CONNECT SECURELY 

    Result: 

    C 

    REPLACE MALFUNCTIONING PARTS 

    Result: 

    A 

    See step  8

  8. CHECK GROUND WIRE CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY) 

    Refer to INSTALLATION [09/2022 - ]

    OK

    The ground wire is securely installed.

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    CONNECT SECURELY 

    Result: 

    OK 

    See step  9

  9. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - INVERTER WITH CONVERTER ASSEMBLY) 

    See step  9

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  10

  10. INSPECT HYBRID VEHICLE CONTROL ECU 

    See step  10

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE HYBRID VEHICLE CONTROL ECU. Refer to  REMOVAL [09/2022 - ] 

    Result: 

    OK 

    See step  11

  11. CHECK DC/DC CONVERTER FUNCTION 

    See step  12

    Result

    Proceed to
    OK
    NG

    Result: 

    OK 

    REPLACE INVERTER WITH CONVERTER ASSEMBLY. Refer to  REMOVAL [09/2022 - ] 

    Result: 

    NG 

    See step  12

  12. CHECK HIGH VOLTAGE INSULATION 

    See step  14

    Result

    Proceed to
    OK
    NG

    Result: 

    OK 

    REPLACE INVERTER WITH CONVERTER ASSEMBLY. Refer to  REMOVAL [09/2022 - ] 

    Result: 

    NG 

    See step  13

  13. CHECK GENERATOR HIGH-VOLTAGE CIRCUIT 

    Refer to Generator High-voltage Circuit [09/2022 - ]

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  14

  14. CHECK MOTOR HIGH-VOLTAGE CIRCUIT 

    Refer to Motor High-voltage Circuit [09/2022 - ]

    HINT: 

    If the "Motor High-voltage Circuit" inspection results are normal, perform the next step.

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    REPLACE INVERTER WITH CONVERTER ASSEMBLY. Refer to  REMOVAL [09/2022 - ] 

  15. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - NO. 1 ENGINE ROOM RELAY BLOCK AND NO. 1 JUNCTION BLOCK ASSEMBLY) 

    See step  15

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    See step  18

    Result: 

    OK 

    See step  16

  16. CHECK INVERTER WITH CONVERTER ASSEMBLY (AMD TERMINAL) 

    See step  16

    Result

    Proceed to
    OK
    NG

    Result: 

    OK 

    REPLACE FUSE (DC/DC) 

    Result: 

    NG 

    See step  17

  17. REPLACE INVERTER WITH CONVERTER ASSEMBLY 

    Refer to REMOVAL [09/2022 - ]

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    REPLACE FUSE (DC/DC) 

  18. REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    REPLACE FUSE (DC/DC) 

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