HYBRID CONTROL SYSTEM, Diagnostic DTC:P0C7600

DTC Code DTC Name
P0C7600 Hybrid/EV Battery System Discharge Time Too Long

DTC SUMMARY


  1. MALFUNCTION DESCRIPTION

    When the power switch is turned from on (READY) to off, the hybrid vehicle control ECU detect that the high-voltage capacitor inside the inverter with converter assembly is not discharged.

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


      Inverter voltage sensor (VH) internal circuit malfunction

    • Voltage sensor (VH) malfunction

    • Motor generator control ECU (MG ECU) malfunction

    • Communication (wire harness) malfunction


      High voltage system malfunction

    • Inverter with converter assembly malfunction


      Shutdown signal circuit malfunction

    • Hybrid vehicle control ECU malfunction

    • Wire harness malfunction

    • Inverter with converter assembly malfunction

DESCRIPTION

For a description of the inverter.

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DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P0C7600 Hybrid/EV Battery System Discharge Time Too Long

The inverter voltage (VH) does not drop during discharge.

(Discharge: Offsetting of the residual pressure in the high-voltage side after power switch is turned off)

(1 trip detection logic)

  • Inverter with converter assembly

  • Wire harness or connector

  • Hybrid vehicle control ECU

 Does not come on

Master Warning Light:

Comes on

Tech Tips

When the power switch is turned from on (READY) to off, the MG ECU discharges voltage stored in the inverter by allowing current to flow to motor (MG2) without generating torque. When the vehicle is normal, VH voltage becomes approximately 0 V after discharging. If VH voltage exceeds a specified value, this DTC is stored.

B004OVEE07
Related Data List
DTC No. Data List
P0C7600 VH-Voltage after Boosting

CONFIRMATION DRIVING PATTERN

Tech Tips

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

Click here

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  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 (READY) and wait for 30 seconds or more.

  6. Turn the power switch off and wait for 30 seconds or more.

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

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

  9. 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 driving pattern again.

WIRING DIAGRAM

Refer to the wiring diagram for the shut down signal circuit.

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CAUTION / NOTICE / HINT

CAUTION:


  • Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.

  • After removing the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.

    Click here

    Tech Tips

    Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

Note

After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

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PROCEDURE


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


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control and Motor Generator / Trouble Codes.


      Powertrain > Hybrid Control > Trouble Codes
      Powertrain > Motor Generator > Trouble Codes

    4. Check for DTCs.

      Result
      Result Proceed to
      P0C7600 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
      Malfunction Content System Relevant DTC
      Microcomputer malfunction Hybrid control system P060647 Hybrid/EV Powertrain Control Module Processor Watchdog / Safety MCU 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
      P0A1B49 Drive Motor "A" Control Module Internal Electronic Failure
      P1C9E9F Hybrid/EV System Reset Stuck Off
      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
      P1C2B1C Drive Motor "A" Control Module A/D Converter Circuit Voltage Out of Range
      P1C2B49 Drive Motor "A" Control Module A/D Converter Circuit Internal Electronic Failure
      P1CAC49 Generator Position Sensor Internal Electronic Failure
      P1CAD49 Drive Motor "A" Position Sensor Internal Electronic Failure
      P1CAF38 Generator Position Sensor REF Signal Cycle Malfunction Signal Frequency Incorrect
      P1CB038 Drive Motor "A" Position Sensor REF Signal Frequency Incorrect
      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
      Power source circuit malfunction Motor generator control system P06D61C Generator Control Module Offset Power Circuit Voltage Out of Range
      P06B01C Generator Control Module Position Sensor REF Power Source 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
      Sensor and actuator circuit malfunction Hybrid control system P0AD911 Hybrid/EV Battery Positive Contactor Circuit Short to Ground
      P0AD915 Hybrid/EV Battery Positive Contactor Circuit Short to Auxiliary Battery or Open
      P0ADD11 Hybrid/EV Battery Negative Contactor Circuit Short to Ground
      P0ADD15 Hybrid/EV Battery Negative Contactor Circuit Short to Auxiliary Battery or Open
      P0AE411 Hybrid/EV Battery Precharge Contactor Circuit Short to Ground
      P0AE415 Hybrid/EV Battery Precharge Contactor Circuit Short to Auxiliary Battery or Open
      Motor generator control system P0A3F16 Drive Motor "A" Position Sensor Circuit Voltage Below Threshold
      P0A4B16 Generator Position Sensor Circuit Voltage Below Threshold
      P0A4B21 Generator Position Sensor Signal Amplitude < Minimum
      P0A4B22 Generator Position Sensor Signal Amplitude > Maximum
      P0C5013 Drive Motor "A" Position Sensor Circuit "A" Circuit Open
      P0C5016 Drive Motor "A" Position Sensor Circuit "A" Circuit Voltage Below Threshold
      P0C5017 Drive Motor "A" Position Sensor Circuit "A" Circuit Voltage Above Threshold
      P0C5A13 Drive Motor "A" Position Sensor Circuit "B" Circuit Open
      P0C5A16 Drive Motor "A" Position Sensor Circuit "B" Circuit Voltage Below Threshold
      P0C5A17 Drive Motor "A" Position Sensor Circuit "B" Circuit Voltage Above Threshold
      P0C6413 Generator Position Sensor Circuit "A" Circuit Open
      P0C6416 Generator Position Sensor Circuit "A" Circuit Voltage Below Threshold
      P0C6417 Generator Position Sensor Circuit "A" Circuit Voltage Above Threshold
      P0C6913 Generator Position Sensor Circuit "B" Circuit Open
      P0C6916 Generator Position Sensor Circuit "B" Circuit Voltage Below Threshold
      P0C6917 Generator Position Sensor Circuit "B" Circuit Voltage Above Threshold
      System malfunction Hybrid control system P0D2D1C Drive Motor "A" Inverter Voltage Sensor Voltage Out of Range
      P1C8349 High Voltage Power Resource Circuit Voltage Sensor after Boosting 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
      P1CB69E Drive Motor "A" Inverter Voltage Sensor (VH) Stuck On

      Tech Tips


      • P0C7600 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.


    B

    GO TO DTC CHART (HYBRID CONTROL SYSTEM) Click here

    C

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

    A

  2. CHECK SHUT DOWN SIGNAL CIRCUIT

    Click here

    Tech Tips

    If the "Shut Down Signal Circuit" inspection results are normal, perform the next step.

    Result
    Proceed to
    NEXT

    NEXT

    REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here