MOTOR GENERATOR CONTROL SYSTEM, Diagnostic DTC:P0A7A9E, P1C5F19

DTC Code DTC Name
P0A7A9E Generator Inverter Stuck On
P1C5F19 Generator Inverter Circuit Current Above Threshold

DTC SUMMARY


  1. MALFUNCTION DESCRIPTION

    This DTC indicates that a large current flowed in the inverter generator. The cause of this malfunction may be one of the following:

    Area Main Malfunction Description
    Hybrid vehicle transaxle assembly

    • Open or short circuit in the generator coils

    • Generator (MG1) internal malfunction (iron particles or damage from foreign objects)
    Resolver Open or short circuit in the generator resolver
    Inverter

    • Inverter internal circuit malfunction

    • Malfunction in ECU that controls the inverter

    • Inverter control sensor (current sensor, VH sensor, VL sensor)
    Inverter cooling system

    • Inverter water pump assembly malfunction

    • Coolant leak

    • Coolant frozen

    • Blockage

DESCRIPTION

For a description of the inverter.

Click here

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P0A7A9E Generator Inverter Stuck On

Generator inverter fail signal detected (circuit malfunction)

(1 trip detection logic)

  • Inverter cooling system

  • Cooling fan system

  • Grille shutter system

  • Wire harness or connector

  • Motor cable

  • Hybrid vehicle transaxle assembly

  • PCU FR fuse

  • Inverter with converter assembly

  • Hybrid vehicle control ECU

 Comes on

Master Warning Light:

Comes on
P1C5F19 Generator Inverter Circuit Current Above Threshold

Generator inverter fail signal detected:

A malfunction is detected in any of the generator components (generator inverter, Generator (MG1), generator resolver, motor generator control ECU, etc.).

(1 trip detection logic)

  • Inverter cooling system

  • Cooling fan system

  • Grille shutter system

  • Wire harness or connector

  • Motor cable

  • Hybrid vehicle transaxle assembly

  • PCU FR fuse

  • Inverter with converter assembly

  • Hybrid vehicle control ECU

 Comes on

Master Warning Light:

Comes on
Related Data List
DTC No. Data List

P0A7A9E

P1C5F19

 Emergency Inverter Shut Down

CONFIRMATION DRIVING PATTERN

Tech Tips

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

Click here


  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 (IG) and turn the GTS on.

  6. With power switch on (IG) and wait for 5 seconds or more.

  7. Turn the power switch on (READY) and wait for 5 seconds or more.

  8. Depress the accelerator pedal of the vehicle with the engine stopped and park (P) selected to start the engine.

    Tech Tips

    Check that there are no abnormalities (abnormal sounds, coolant leaks, etc.).

  9. Drive the vehicle approximately 10 minutes mainly using the engine.

    Note

    As the state of charge of the HV battery may be low after driving in fail-safe mode, it will automatically be charged for 5 to 10 minutes with power switch on (READY) after repairs have been performed.

  10. Enter the following menus: Powertrain / Motor Generator / Utility / All Readiness.

  11. 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 Generator Resolver Circuit.

Click here

Refer to the wiring diagram for the Motor Resolver Circuit.

Click here

Refer to the wiring diagram for the Generator High-voltage Circuit.

Click here

Refer to the wiring diagram for the Motor High-voltage Circuit.

Click here

Refer to the wiring diagram for the Inverter Low-voltage Circuit.

Click here

Refer to the wiring diagram for the Cooling System.

Click here

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.

    Click here

  • After troubleshooting and repairing all output DTCs, be sure to replace the inverter with converter assembly. (The inverter with converter assembly may have been broken or damaged due to overheating.)

PROCEDURE


  1. CHECK DTC OUTPUT (MOTOR GENERATOR CONTROL)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

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

    4. Check for DTCs.


      Powertrain > Motor Generator > Trouble Codes
      Result
      Result Proceed to
      P0A7A73 is not output A
      P0A7A73 is output B

      Note


      • If P0A7A73 is output, troubleshoot it first. After completing the troubleshooting for P0A7A73, perform troubleshooting for this DTC.

      • Parts repaired or replaced during troubleshooting for P0A7A73 do not need to be re-inspected in this diagnostic procedure.

    5. Turn the power switch off.


    B

    CHECK DTC OUTPUT (HYBRID CONTROL) Click here

    A

  2. CHECK DTC OUTPUT


    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.

    4. Check for DTCs.


      Powertrain > Hybrid Control > Trouble Codes
      Powertrain > Motor Generator > Trouble Codes
      Result
      Result Proceed to
      P0A7A9E or P1C5F19 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
      Table 1
      Malfunction Content System Relevant DTC
      Insulation Malfunction Hybrid control system P1C7C49 Hybrid/EV Battery Voltage System Isolation (A/C Area) Internal Electronic Failure
      P1C7D49 Hybrid/EV Battery Voltage System Isolation (Hybrid/EV Battery Area) Internal Electronic Failure
      P1C7E49 Hybrid/EV Battery Voltage System Isolation (Transaxle Area) Internal Electronic Failure
      P1C7F49 Hybrid/EV Battery Voltage System Isolation (Direct Current Area) Internal Electronic Failure
      System Main Relay or High Voltage Circuit Malfunction Hybrid control system P0AD911 Hybrid/EV Battery Positive Contactor Circuit Short to Ground
      P0AD915 Hybrid/EV Battery Positive Contactor Circuit Short to Battery or Open
      P0ADD11 Hybrid/EV Battery Negative Contactor Circuit Short to Ground
      P0ADD15 Hybrid/EV Battery Negative Contactor Circuit Short to Battery or Open
      P1C8449 High Voltage Power Resource Circuit Short during Ready ON
      HV Battery Malfunction Hybrid control system P0AFC16 Hybrid/EV Battery Sensor Module Circuit Voltage Below Threshold
      P0AFC96 Hybrid/EV Battery Sensor Module Component Internal Failure
      P1CBE1E Hybrid/EV Battery Block 1 (Voltage Difference) Circuit Resistance Out of Range
      P1CBF1E Hybrid/EV Battery Block 2 (Voltage Difference) Circuit Resistance Out of Range
      P1CC01E Hybrid/EV Battery Block 3 (Voltage Difference) Circuit Resistance Out of Range
      P1CC11E Hybrid/EV Battery Block 4 (Voltage Difference) Circuit Resistance Out of Range
      P1CC21E Hybrid/EV Battery Block 5 (Voltage Difference) Circuit Resistance Out of Range
      P1CC31E Hybrid/EV Battery Block 6 (Voltage Difference) Circuit Resistance Out of Range
      P1CC41E Hybrid/EV Battery Block 7 (Voltage Difference) Circuit Resistance Out of Range
      P1CC51E Hybrid/EV Battery Block 8 (Voltage Difference) Circuit Resistance Out of Range
      P1CC61E Hybrid/EV Battery Block 9 (Voltage Difference) Circuit Resistance Out of Range
      P301100 Hybrid/EV Battery Block 1 (Internal Resistance Difference) Circuit Resistance Out of Range (Extreme)
      P301200 Hybrid/EV Battery Block 2 (Internal Resistance Difference) Circuit Resistance Out of Range (Extreme)
      P301300 Hybrid/EV Battery Block 3 (Internal Resistance Difference) Circuit Resistance Out of Range (Extreme)
      P301400 Hybrid/EV Battery Block 4 (Internal Resistance Difference) Circuit Resistance Out of Range (Extreme)
      P301500 Hybrid/EV Battery Block 5 (Internal Resistance Difference) Circuit Resistance Out of Range (Extreme)
      P301600 Hybrid/EV Battery Block 6 (Internal Resistance Difference) Circuit Resistance Out of Range (Extreme)
      P301700 Hybrid/EV Battery Block 7 (Internal Resistance Difference) Circuit Resistance Out of Range (Extreme)
      P301800 Hybrid/EV Battery Block 8 (Internal Resistance Difference) Circuit Resistance Out of Range (Extreme)
      P301900 Hybrid/EV Battery Block 9 (Internal Resistance Difference) Circuit Resistance Out of Range (Extreme)
      U029A87 Lost Communication with Hybrid/EV Battery Sensor Module Missing Message
      Table 2
      Malfunction Content System Relevant DTC
      Microcomputer malfunction Motor generator control system P0A1A47 Generator Control Module Watchdog / Safety μC Failure
      P0A1A49 Generator Control Module Internal Electronic Failure
      P0A1B1F Generator Control Module Circuit Intermittent
      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
      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
      P313483 Communication Error from Drive Motor "A" to Generator Value of Signal Protection Calculation Incorrect
      P313486 Communication Error from Drive Motor "A" to Generator Signal Invalid
      P313487 Communication Error from Drive Motor "A" to Generator Missing Message
      Hybrid control system P0A1B49 Drive Motor "A" Control Module Internal Electronic Failure
      Power source circuit malfunction Motor generator control system P06B01C Generator Control Module Position Sensor REF Power Source Circuit Voltage Out of Range
      P06D61C Generator Control Module Offset Power Circuit Voltage Out of Range
      Communication malfunction Motor generator control system P312487 Lost Communication between Drive Motor "A" and HV ECU Missing Message
      Hybrid control system P312387 Lost Communication with Missing Message
      Sensor and actuator circuit malfunction Motor generator control system P0A3F16 Drive Motor "A" Position Sensor Circuit Voltage Below Threshold
      P0A3F21 Drive Motor "A" Position Sensor Signal Amplitude < Minimum
      P0A3F22 Drive Motor "A" Position Sensor Signal Amplitude > Maximum
      P0A4B16 Generator Position Sensor Circuit Voltage Below Threshold
      P0A4B21 Generator Position Sensor Signal Amplitude < Minimum
      P0A4B22 Generator Position Sensor Signal Amplitude > Maximum
      P0A6012 Drive Motor "A" Phase V Current (High Resolution) Circuit Short to Battery
      P0A6014 Drive Motor "A" Phase V Current (High Resolution) Circuit Short to Ground or Open
      P0A601C Drive Motor "A" Phase V Current (High Resolution) Circuit Voltage Out of Range
      P0A6312 Drive Motor "A" Phase W Current (High Resolution) Circuit Short to Battery
      P0A6314 Drive Motor "A" Phase W Current (High Resolution) Circuit Short to Ground or Open
      P0A631C Drive Motor "A" Phase W Current (High Resolution) Circuit Voltage Out of Range
      P0BE512 Drive Motor "A" Phase U Current Sensor Circuit Short to Battery
      P0BE514 Drive Motor "A" Phase U Current Sensor Circuit Short to Ground or Open
      P0BE528 Drive Motor "A" Phase U Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure
      P0BE912 Drive Motor "A" Phase V Current Sensor Circuit Short to Battery
      P0BE914 Drive Motor "A" Phase V Current Sensor Circuit Short to Ground or Open
      P0BE928 Drive Motor "A" Phase V Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure
      P0BED12 Drive Motor "A" Phase W Current Sensor Circuit Short to Battery
      P0BED14 Drive Motor "A" Phase W Current Sensor Circuit Short to Ground or Open
      P0BED28 Drive Motor "A" Phase W Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure
      P0BFD62 Drive Motor "A" Phase U-V-W Current Sensor Signal Compare Failure
      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
      P0D2D16 Drive Motor "A" Inverter Voltage Sensor (VH) Circuit Voltage Below Threshold
      P0D2D17 Drive Motor "A" Inverter Voltage Sensor (VH) Circuit Voltage Above Threshold
      P0DFA62 Generator Phase U-V-W Current Sensor Signal Compare Failure
      P0E0012 Generator Phase U Current Sensor Circuit Short to Battery
      P0E0014 Generator Phase U Current Sensor Circuit Short to Ground or Open
      P0E0028 Generator Phase U Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure
      P0E0412 Generator Phase V Current Sensor Circuit Short to Battery
      P0E0414 Generator Phase V Current Sensor Circuit Short to Ground or Open
      P0E0428 Generator Phase V Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure
      P0E0812 Generator Phase W Current Sensor Circuit Short to Battery
      P0E0814 Generator Phase W Current Sensor Circuit Short to Ground or Open
      P0E0828 Generator Phase W Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure
      P0E3116 DC/DC Converter Voltage Sensor "A" (VL) Circuit Voltage Below Threshold
      P0E3117 DC/DC Converter Voltage Sensor "A" (VL) Circuit Voltage Above Threshold
      P0E5111 DC/DC Converter Current Sensor Circuit Short to Ground
      P0E5115 DC/DC Converter Current Sensor Circuit Short to Battery or Open
      P0E512A DC/DC Converter Current Sensor Signal Stuck In Range
      P0E511C DC/DC Converter Current Sensor Circuit Voltage Out of Range
      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
      Hybrid control system P0C7600 Hybrid/EV Battery System Discharge Time Too Long
      P0D2D1C Drive Motor "A" Inverter after Boosting Voltage Sensor Circuit Voltage Out of Range
      P0E311C Drive Motor "A" Inverter before Boosting Voltage Sensor Circuit Voltage Out of Range
      System malfunction Motor generator control system P0A9000 Drive Motor "A" Performance
      P0A9200 Hybrid Generator Performance
      P0A949E DC/DC Converter Stuck On
      P0BFF1D Drive Motor "A" Circuit Current Out of Range
      P0C1900 Drive Motor "A" Execution Torque Performance
      P0CA300 DC/DC Converter Step Up Voltage Performance
      P0D3319 DC/DC Converter Circuit Current Above Threshold
      P0E5717 DC/DC Converter Voltage Sensor "A" (VL) Circuit Voltage Above Threshold
      P0E7100 Generator Execution Torque Performance
      P1CA51D Hybrid Generator Circuit Current Out of Range
      P1CB59E DC/DC Converter Voltage Sensor "A" (VL) Stuck On
      P314F1F DC/DC Converter Voltage Sensor "A" (VL) Circuit Intermittent
      P31531D DC/DC Converter Current Sensor Circuit Current Out of Range
      Hybrid control system P0A9300 Inverter "A" Cooling System
      P0AA649 Hybrid/EV Battery Voltage System Isolation Internal Electronic Failure
      P0C7396 Motor Electronics Coolant Pump "A" Component Internal Failure
      P314A31 Motor Electronics Coolant Pump "A" No Signal
      Table 3
      Relevant DTC
      P0A3F1F Drive Motor "A" Position Sensor Circuit Intermittent
      P0A4B1F Generator Position Sensor Circuit Intermittent
      P0A601F Drive Motor "A" Phase V Current (High Resolution) Circuit Intermittent
      P0A631F Drive Motor "A" Phase W Current (High Resolution) Circuit Intermittent
      P0C501F Drive Motor "A" Position Sensor Circuit "A" Circuit Intermittent
      P0C5A1F Drive Motor "A" Position Sensor Circuit "B" Circuit Intermittent
      P0C641F Generator Position Sensor Circuit "A" Circuit Intermittent
      P0C691F Generator Position Sensor Circuit "B" Circuit Intermittent
      P0D2D1F Drive Motor "A" Inverter Voltage Sensor (VH) Circuit Intermittent
      P0E311F DC/DC Converter Voltage Sensor "A" (VL) Circuit Intermittent
      P1C601F Generator Control Module Position Sensor REF Power Source Circuit Intermittent
      P1C621F Generator Control Module Offset Power Circuit Intermittent
      P1C641F Generator Control Module Circuit Intermittent
      P1C651F Generator Control Module Circuit Intermittent
      P1C671F Drive Motor "A" Phase U-V-W Current Sensor Circuit Intermittent
      P1C691F Generator Phase U-V-W Current Sensor Circuit Intermittent
      P31241F Lost Communication between Drive Motor "A" and HV ECU Circuit Intermittent

      Tech Tips


      • P0A7A9E or P1C5F19 may be output as a result of the malfunctions 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.)

      • If DTC P0A7A9E is output, replace the inverter with converter assembly after completing repairs.

    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

  3. CHECK DIAGNOSIS RELATED INFORMATION


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Motor Generator / Utility / Diagnosis Related Information.


      Powertrain > Motor Generator > Utility
      Tester Display
      Diagnosis Related Information

    4. Read the diagnosis related information.

      Result
      Result Proceed to
      Diagnosis Related Information P312487 is output A
      Diagnosis Related Information P312487 is not output B

    5. Turn the power switch off.


    A

    GO TO DTC CHART (P312487) Click here

    B

  4. CHECK FREEZE FRAME DATA


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

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

    4. Read the freeze frame data of DTC P0A7A9E or P1C5F19.


      Powertrain > Motor Generator
      Tester Display
      Emergency Shutdown Signal
      Result
      Result Proceed to
      The value of Emergency Shutdown Signal is ON A
      The value of Emergency Shutdown Signal is OFF B

    5. Turn the power switch off.


    A

    GO TO DTC CHART (P321E9F) Click here

    B

  5. CHECK COOLING SYSTEM

    Click here

    Result
    Proceed to
    NEXT

    NEXT

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

    CAUTION:

    Be sure to wear insulated gloves.


    1. Check that the service plug grip is not installed.

      Note

      After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. B004PEX

      Check the connection condition of the low voltage connectors of the inverter with converter assembly and the contact pressure of each terminal. Check the terminals for deformation, and the connector for water and foreign matter.

      Tech Tips

      Click here

      Note

      Before disconnecting the connector, confirm that it is properly connected by checking that the claws of the lock levers are engaged and that the connector cannot be pulled off.

      OK
      - The connector is connected securely.
      - The terminals are not deformed and are connected securely.
      - No water or foreign matter in the connector.

      Tech Tips

      When connecting the connector, connect it with the lock levers raised. Rotate each lock lever downward and make sure that the connector is securely connected. When a lock lever is fully lowered, a click will be heard as its claw engages. After the click is heard, pull up on the connector to confirm that it is securely connected.

      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

    B

    CONNECT SECURELY

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

  7. CHECK GENERATOR RESOLVER CIRCUIT

    Click here

    Result
    Proceed to
    NEXT

    NEXT

  8. CHECK MOTOR RESOLVER CIRCUIT

    Click here

    Result
    Proceed to
    NEXT

    NEXT

  9. CHECK GENERATOR HIGH-VOLTAGE CIRCUIT

    Click here

    Result
    Proceed to
    NEXT

    NEXT

  10. CHECK MOTOR HIGH-VOLTAGE CIRCUIT

    Click here

    Result
    Proceed to
    NEXT

    NEXT

  11. CHECK INVERTER LOW-VOLTAGE CIRCUIT

    Click here

    Tech Tips

    If the "Inverter Low-voltage Circuit" inspection results are normal, perform the next step.

    Result
    Proceed to
    NEXT

    NEXT

    REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here

  12. CHECK DTC OUTPUT (HYBRID CONTROL)


    1. Connect the GTS 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
      DTCs except the ones in the table below are also output. A
      Any of the following DTCs are also output. B
      Malfunction Content Relevant DTC
      Insulation Malfunction P1C7C49 Hybrid/EV Battery Voltage System Isolation (A/C Area) Internal Electronic Failure
      P1C7D49 Hybrid/EV Battery Voltage System Isolation (Hybrid/EV Battery Area) Internal Electronic Failure
      P1C7E49 Hybrid/EV Battery Voltage System Isolation (Transaxle Area) Internal Electronic Failure
      P1C7F49 Hybrid/EV Battery Voltage System Isolation (Direct Current Area) Internal Electronic Failure

      Tech Tips


      • P0A7A73, P0A7A9E or P1C5F19 may be output as a result of the malfunctions 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

    A

  13. CHECK HYBRID VEHICLE TRANSAXLE ASSEMBLY (GENERATOR (MG1))

    CAUTION:

    Be sure to wear insulated gloves.


    1. Check that the service plug grip is not installed.

      Note

      After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. Remove the inverter cover from the inverter with converter assembly.

    3. Disconnect the motor cable from the inverter with converter assembly.

    4. B004PFLC03
      *1 Shield Ground
      *a

      Motor Cable (for MG1)

      (Inverter with Converter Assembly Side)

      Using a milliohmmeter, measure the resistance according to the value(s) in the table below.

      Tech Tips

      If the generator (MG1) temperature is high, the resistance will vary greatly from the specification. Therefore, measure the resistance at least 8 hours after the vehicle is stopped.

      Standard Resistance
      Tester Connection Condition Specified Condition
      h2-4 (W) - h2-5 (U) Power switch off 106.4 to 117.4 mΩ
      h2-5 (U) - h2-6 (V) Power switch off 106.4 to 117.4 mΩ
      h2-6 (V) - h2-4 (W) Power switch off 106.4 to 117.4 mΩ

      Tech Tips

      To correct the variation of the measured resistance due to temperature, use the following formula to calculate the resistance at 20°C (68°F).

      R20 = Rt / {1 + 0.00393 X (T - 20)}

      The calculation is based on the following:

      R20: Resistance at 20°C (68°F) (mΩ)

      Rt: Measured resistance (mΩ)

      T: Temperature when the resistance is measured (°C)

    5. Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below.

      Note

      Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected.

      Standard Resistance
      Tester Connection Condition Specified Condition
      h2-4 (W) - Body ground and shield ground Power switch off 10 MΩ or higher
      h2-5 (U) - Body ground and shield ground Power switch off 10 MΩ or higher
      h2-6 (V) - Body ground and shield ground Power switch off 10 MΩ or higher

    6. Reconnect the motor cable.

    7. Install the inverter cover.

      Result
      Proceed to
      OK
      NG

    NG

    CHECK MOTOR CABLE (FOR MG1) Click here

    OK

  14. REPLACE INVERTER WITH CONVERTER ASSEMBLY

    Tech Tips

    Click here

    Result
    Proceed to
    NEXT

    NEXT

    GO TO STEP 24 Click here

  15. CHECK MOTOR CABLE (FOR MG1)

    CAUTION:

    Be sure to wear insulated gloves.


    1. Check that the service plug grip is not installed.

      Note

      After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. Remove the motor cable.

    3. Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below.

      B004P23C02
      *1 Shield Ground *a Motor Cable

      Note

      Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected.

      Standard Resistance
      Tester Connection Condition Specified Condition
      h2-4 (W) or h1-3 (W) - Body ground and shield ground Power switch off 10 MΩ or higher
      h2-5 (U) or h1-2 (U) - Body ground and shield ground Power switch off 10 MΩ or higher
      h2-6 (V) or h1-1 (V) - Body ground and shield ground Power switch off 10 MΩ or higher

      Note

      Wrap the terminal of the motor cable with insulating tape to prevent them from coming into contact with body ground.

    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      h2-4 (W) - h1-3 (W) Power switch off Below 1 Ω
      h2-5 (U) - h1-2 (U) Power switch off Below 1 Ω
      h2-6 (V) - h1-1 (V) Power switch off Below 1 Ω
      h2-4 (W) - h1-2 (U) Power switch off 10 MΩ or higher
      h2-5 (U) - h1-1 (V) Power switch off 10 MΩ or higher
      h2-6 (V) - h1-3 (W) Power switch off 10 MΩ or higher

    5. Install the motor cable.

      Result
      Result
      OK
      NG

    NG

    CHECK HYBRID VEHICLE TRANSAXLE ASSEMBLY (GENERATOR (MG1)) Click here

    OK

  16. REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY

    Tech Tips

    Click here

    Result
    Proceed to
    NEXT

    NEXT

  17. REPLACE INVERTER WITH CONVERTER ASSEMBLY

    Tech Tips

    Click here

    Result
    Proceed to
    NEXT

    NEXT

    GO TO STEP 24 Click here

  18. CHECK HYBRID VEHICLE TRANSAXLE ASSEMBLY (GENERATOR (MG1))

    CAUTION:

    Be sure to wear insulated gloves.


    1. Check that the service plug grip is not installed.

      Note

      After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. Disconnect the motor cable from the hybrid vehicle transaxle assembly.

    3. B004QBGE02

      Check the generator (MG1) for an interphase short using a milliohmmeter.


      1. Using a milliohmmeter, measure the resistance according to the value(s) in the table below.

        Tech Tips

        If the generator (MG1) temperature is high, the resistance will vary greatly from the specification. Therefore, measure the resistance at least 8 hours after the vehicle has been stopped.

        Standard Resistance
        Tester Connection Condition Specified Condition
        h1-3 (W) - h1-2 (U) Power switch off 105.4 to 116.4 mΩ
        h1-2 (U) - h1-1 (V) Power switch off 105.4 to 116.4 mΩ
        h1-3 (W) - h1-1 (V) Power switch off 105.4 to 116.4 mΩ

        Tech Tips

        To correct the variation of the measured resistance due to temperature, use the following formula to calculate the resistance at 20°C (68° F).


        • R20 = Rt / {1 + 0.00393 X (T - 20)}

        The calculation is based on the following:


        • R20: Resistance at 20°C (68° F) (mΩ)

        • Rt: Measured resistance (mΩ)

        • T: Temperature when the resistance is measured (° C)

    4. Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below.

      Note

      Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected.

      Standard Resistance
      Tester Connection Condition Specified Condition
      h1-3 (W) - Body ground and shield ground Power switch off 100 MΩ or higher
      h1-2 (U) - Body ground and shield ground Power switch off 100 MΩ or higher
      h1-1 (V) - Body ground and shield ground Power switch off 100 MΩ or higher

    5. Connect the motor cable.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE MOTOR CABLE Click here

    OK

  19. REPLACE MOTOR CABLE

    Tech Tips

    Click here

    Result
    Proceed to
    NEXT

    NEXT

  20. REPLACE INVERTER WITH CONVERTER ASSEMBLY

    Tech Tips

    Click here

    Result
    Proceed to
    NEXT

    NEXT

    GO TO STEP 24 Click here

  21. REPLACE MOTOR CABLE

    Tech Tips

    Click here

    Result
    Proceed to
    NEXT

    NEXT

  22. REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY

    Tech Tips

    Click here

    Result
    Proceed to
    NEXT

    NEXT

  23. REPLACE INVERTER WITH CONVERTER ASSEMBLY

    Tech Tips

    Click here

    Result
    Proceed to
    NEXT

    NEXT

  24. CHECK DTC OUTPUT


    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.

    4. Check for DTCs.


      Powertrain > Hybrid Control > Trouble Codes
      Powertrain > Motor Generator > Trouble Codes
      Result
      Result Proceed to
      P0A7A9E or P1C5F19 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 Motor generator control system P0A1A47 Generator Control Module Watchdog / Safety μC Failure
      P0A1A49 Generator Control Module Internal Electronic Failure
      P0A1B1F Generator Control Module Circuit Intermittent
      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
      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
      P313483 Communication Error from Drive Motor "A" to Generator Value of Signal Protection Calculation Incorrect
      P313486 Communication Error from Drive Motor "A" to Generator Signal Invalid
      P313487 Communication Error from Drive Motor "A" to Generator Missing Message
      Hybrid control system P0A1B49 Drive Motor "A" Control Module Internal Electronic Failure
      Power source circuit malfunction Motor generator control system P06B01C Generator Control Module Position Sensor REF Power Source Circuit Voltage Out of Range
      P06D61C Generator Control Module Offset Power Circuit Voltage Out of Range
      Communication malfunction Motor generator control system P312487 Lost Communication between Drive Motor "A" and HV ECU Missing Message
      Hybrid control system P312387 Lost Communication with Missing Message
      Sensor and actuator circuit malfunction Motor generator control system P0A3F16 Drive Motor "A" Position Sensor Circuit Voltage Below Threshold
      P0A3F21 Drive Motor "A" Position Sensor Signal Amplitude < Minimum
      P0A3F22 Drive Motor "A" Position Sensor Signal Amplitude > Maximum
      P0A4B16 Generator Position Sensor Circuit Voltage Below Threshold
      P0A4B21 Generator Position Sensor Signal Amplitude < Minimum
      P0A4B22 Generator Position Sensor Signal Amplitude > Maximum
      P0A6012 Drive Motor "A" Phase V Current (High Resolution) Circuit Short to Battery
      P0A6014 Drive Motor "A" Phase V Current (High Resolution) Circuit Short to Ground or Open
      P0A601C Drive Motor "A" Phase V Current (High Resolution) Circuit Voltage Out of Range
      P0A6312 Drive Motor "A" Phase W Current (High Resolution) Circuit Short to Battery
      P0A6314 Drive Motor "A" Phase W Current (High Resolution) Circuit Short to Ground or Open
      P0A631C Drive Motor "A" Phase W Current (High Resolution) Circuit Voltage Out of Range
      P0BE512 Drive Motor "A" Phase U Current Sensor Circuit Short to Battery
      P0BE514 Drive Motor "A" Phase U Current Sensor Circuit Short to Ground or Open
      P0BE528 Drive Motor "A" Phase U Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure
      P0BE912 Drive Motor "A" Phase V Current Sensor Circuit Short to Battery
      P0BE914 Drive Motor "A" Phase V Current Sensor Circuit Short to Ground or Open
      P0BE928 Drive Motor "A" Phase V Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure
      P0BED12 Drive Motor "A" Phase W Current Sensor Circuit Short to Battery
      P0BED14 Drive Motor "A" Phase W Current Sensor Circuit Short to Ground or Open
      P0BED28 Drive Motor "A" Phase W Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure
      P0BFD62 Drive Motor "A" Phase U-V-W Current Sensor Signal Compare Failure
      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
      P0D2D16 Drive Motor "A" Inverter Voltage Sensor (VH) Circuit Voltage Below Threshold
      P0D2D17 Drive Motor "A" Inverter Voltage Sensor (VH) Circuit Voltage Above Threshold
      P0DFA62 Generator Phase U-V-W Current Sensor Signal Compare Failure
      P0E3116 DC/DC Converter Voltage Sensor "A" (VL) Circuit Voltage Below Threshold
      P0E3117 DC/DC Converter Voltage Sensor "A" (VL) Circuit Voltage Above Threshold
      P0E5111 DC/DC Converter Current Sensor Circuit Short to Ground
      P0E5115 DC/DC Converter Current Sensor Circuit Short to Battery or Open
      P0E512A DC/DC Converter Current Sensor Signal Stuck In Range
      P0E511C DC/DC Converter Current Sensor Circuit Voltage Out of Range
      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
      Hybrid control system P0C7600 Hybrid/EV Battery System Discharge Time Too Long
      P0D2D1C Drive Motor "A" Inverter after Boosting Voltage Sensor Circuit Voltage Out of Range
      P0E311C Drive Motor "A" Inverter before Boosting Voltage Sensor Circuit Voltage Out of Range
      System malfunction Motor generator control system P0A9000 Drive Motor "A" Performance
      P0A9200 Hybrid Generator Performance
      P0A949E DC/DC Converter Stuck On
      P0BFF1D Drive Motor "A" Circuit Current Out of Range
      P0C1900 Drive Motor "A" Execution Torque Performance
      P0CA300 DC/DC Converter Step Up Voltage Performance
      P0D3319 DC/DC Converter Circuit Current Above Threshold
      P0E5717 DC/DC Converter Voltage Sensor "A" (VL) Circuit Voltage Above Threshold
      P0E7100 Generator Execution Torque Performance
      P1CA51D Hybrid Generator Circuit Current Out of Range
      P1CB59E DC/DC Converter Voltage Sensor "A" (VL) Stuck On
      P314F1F DC/DC Converter Voltage Sensor "A" (VL) Circuit Intermittent
      P31531D DC/DC Converter Current Sensor Circuit Current Out of Range
      Hybrid control system P0A9300 Inverter "A" Cooling System
      P0AA649 Hybrid/EV Battery Voltage System Isolation Internal Electronic Failure
      P0C7396 Motor Electronics Coolant Pump "A" Component Internal Failure
      P314A31 Motor Electronics Coolant Pump "A" No Signal

      Tech Tips


      • P0A7A9E or P1C5F19 may be output as a result of the malfunctions 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.)

      • If DTC P0A7A9E is output, replace the inverter with converter assembly after completing repairs.

    5. Turn the power switch off.


    A

    GO TO STEP 3 Click here

    B

    GO TO DTC CHART (HYBRID CONTROL SYSTEM) Click here

    C

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