HYBRID CONTROL SYSTEM, Diagnostic DTC:P0E71-344

DTC Code DTC Name
P0E71-344 Generator Torque Delivered Performance

DESCRIPTION

For a description of the inverter Click here.

If the generator (MG1) torque execution value does not correspond to the torque command value from the MG ECU to generator (MG1), the hybrid vehicle control ECU will store this DTC.

DTC No. INF Code DTC Detection Condition Trouble Area
P0E71 344

Generator (MG1) torque execution monitoring malfunction

The difference between the generator torque requested by the hybrid vehicle control ECU and actual motor torque is large.

(1 trip detection logic)

  • Hybrid vehicle transaxle assembly

  • Motor cable

  • Inverter with converter assembly

  • Wire harness or connector

  • Hybrid vehicle control ECU
Related Data List
DTC No. Data List
P0E71-344

  • Generator(MG1) Torq

  • G (MG1) Trq Exec Val

WIRING DIAGRAM

Refer to the wiring diagram for DTC P0AA6-526 Click here.

Refer to the wiring diagram for DTC P321E-318 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 ignition 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.

Tech Tips

After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.


  1. Turn the ignition switch to ON (READY) and wait for 5 seconds or more.

  2. Drive the vehicle for approximately 10 minutes mainly using the engine.

PROCEDURE


  1. CHECK DTC OUTPUT (HYBRID CONTROL)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON (IG).

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

    4. Check if DTCs are output.

      Result
      Result Proceed to
      Only P0E71-344 is output or P0E71-344 and DTCs other than the ones in the table below are also output. A
      Any of the following DTCs are also output. B
      DTC No. Relevant Diagnosis
      P06B0-163 Sensor Power Supply "A" Circuit/Open
      P06D6-511 Sensor Reference Voltage "F" Circuit/Open
      P06E6-164 Sensor Power Supply "C" Circuit/Open
      P0A1A-151, 166, 517, 658, 791, 809 Generator Control Module
      P0A1B-198, 503, 505, 547, 554, 786, 794, 806 Drive Motor "A" Control Module
      P0A1D (all INF codes)*1 Hybrid Powertrain Control Module
      P0A3F-243 Drive Motor "A" Position Sensor Circuit
      P0A40-500, 504, 506, 549, 556, 808 Drive Motor "A" Position Sensor Circuit Range/Performance
      P0A41-245 Drive Motor "A" Position Sensor Circuit Low
      P0A4B-253 Generator Position Sensor Circuit
      P0A4C-513, 518, 811 Generator Position Sensor Circuit Range/Performance
      P0A4D-255 Generator Position Sensor Circuit Low
      P0A78-279, 287, 548, 555, 807 Drive Motor "A" Inverter Performance
      P0A7A-203, 325, 810 Generator Inverter Performance
      P0AA6 (all INF codes)*1 Hybrid Battery Voltage System Isolation Fault
      P0BEA-290 Drive Motor "A" Phase V Current Sensor Circuit Range/Performance
      P0BEE-298 Drive Motor "A" Phase W Current Sensor Circuit Range/Performance
      P0C76-523 Hybrid Battery System Discharge Time Too Long
      P0D2E-586 Drive Motor "A" Inverter Voltage Sensor Circuit Range/Performance
      P0D2F-266 Drive Motor "A" Inverter Voltage Sensor Circuit Low
      P0D30-267 Drive Motor "A" Inverter Performance
      P0E05-328 Generator Phase V Current Sensor Circuit Range/Performance
      P0E09-336 Generator Phase W Current Sensor Circuit Range/Performance
      P0E32-585 DC/DC Converter Voltage Sensor "A" Range/Performance
      P0E33-589 DC/DC Converter Voltage Sensor "A" Low
      P0E34-590 DC/DC Converter Voltage Sensor "A" High
      P1C2A-155 Generator A/D Converter Circuit
      P1C2B-192 Drive Motor "A" A/D Converter Circuit
      P1C2D-587 Hybrid Battery Voltage / DC/DC Converter Voltage Correlation
      P1C3C-294 Drive Motor "A" Phase V Current Sensor Correlation
      P1C3D-302 Drive Motor "A" Phase W Current Sensor Correlation
      P1C3E-333 Generator Phase V Current Sensor Correlation
      P1C3F-341 Generator Phase W Current Sensor Correlation
      P1C4A-288 Drive Motor "A" Phase V Current Sensor Sub Circuit Range/Performance
      P1C4F-296 Drive Motor "A" Phase W Current Sensor Sub Circuit Range/Performance
      P1C54-326 Generator Phase V Current Sensor Sub Circuit Range/Performance
      P1C59-334 Generator Phase W Current Sensor Sub Circuit Range/Performance
      P1C6D-501 Drive Motor "A" Phase V Current Sensor Offset Range/Performance
      P1C6E-502 Drive Motor "A" Phase W Current Sensor Offset Range/Performance
      P1C71-515 Generator Phase V Current Sensor Offset Range/Performance
      P1C72-516 Generator Phase W Current Sensor Offset Range/Performance
      P1C73-512 Sensor Standard Voltage "F" Circuit/Open
      P1CA6-156 Generator Control Module Malfunction
      P1CA7-193 Drive Motor Control Module Malfunction
      P1CAC-200 Generator Position Sensor Angle Malfunction
      P1CAD-168 Drive Motor "A" Position Sensor Angle Malfunction
      P1CAF-792 Generator Position Sensor REF Signal Cycle Malfunction
      P1CB0-795 Drive Motor "A" Position Sensor REF Signal Cycle Malfunction
      P1CB2-793 Generator Position Sensor REF Signal Stop Malfunction
      P1CB3-796 Drive Motor "A" Position Sensor REF Signal Stop Malfunction
      P3004-132 High Voltage Power Resource
      P3133-659 Communication Error from Generator to Drive Motor "A"
      P3134-661 Communication Error from Drive Motor "A" to Generator

      Tech Tips


      • *1: If any INF codes are output for this DTC, refer to the corresponding diagnostic procedure.

      • P0E71-344 may be set due to a malfunction which also causes DTCs in the preceding table to be set. In this case, first troubleshoot the output DTCs in the preceding table. Then, perform a test to attempt to reproduce the problems, and check that no DTCs are output.

    5. Turn the ignition switch off.


    B

    GO TO DTC CHART (HYBRID CONTROL SYSTEM) Click here

    A

  2. CHECK DTC OUTPUT (HYBRID CONTROL)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON (IG).

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

    4. Check if DTCs are output.

      Result
      Result Proceed to
      Any of the following DTCs are also output. A
      Only P0E71-344 is output or P0E71-344 and DTCs other than the ones in the table below are also output. B
      DTC No. Relevant Diagnosis
      P0A90-251, 509 Drive Motor "A" Performance
      P0C19-306 Drive Motor "A" Inverter Performance

      Tech Tips

      When the DTCs listed in the table above are also output, there may be a short between the HSDN (MG shut down signal) circuit and power circuit.

    5. Turn the ignition switch off.


    B

    CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR) Click here

    A

  3. CHECK HYBRID VEHICLE CONTROL ECU


    1. Turn the ignition switch to ON (IG).

    2. A004GC3E02
      Text in Illustration
      *a

      Component with harness connected

      (Hybrid Vehicle Control ECU)

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A27-12 (HSDN) - F55-6 (E1) Ignition switch ON (IG) Below 4.5 V

    3. Turn the ignition switch off.


    NG

    CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - INVERTER WITH CONVERTER ASSEMBLY) Click here

    OK

  4. 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 ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. A004GGV

      Check the connector connections and contact pressure of the low voltage connectors of the inverter with converter assembly Click here.

      Note

      Before disconnecting the connector, confirm that it is properly connected by checking that the locking claws are engaged and that the connector does not pull out.

      OK
      The connectors are connected securely and there are no contact pressure problems.

      Tech Tips

      When connecting the connector, insert it with the locking lever in the raised position. Rotate the lever downward and make sure that the connector is pulled into its socket. When the locking lever is in its fully closed position, a click will be heard as its locking claws engage. After the click is heard, pull up on the connector to confirm that it is properly connected.


    NG

    CONNECT SECURELY

    OK

  5. CHECK INVERTER WITH CONVERTER ASSEMBLY (MOTOR CABLE (FOR MG1) CONNECTION CONDITION)

    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 ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. A004EQ3

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

    3. A004G00

      Remove the inverter cover from the inverter with converter assembly.

    4. A004FDEE03

      Check that the bolts for the motor cable (for MG1) are tightened to the specified torque, the motor cable (for MG1) is connected securely, and there are no contact problems.

      Specified Condition
      Bolt A
      T=8.0 N*m (82 kgf*cm, 71 in.*lbf)
      Bolt B
      T=9.2 N*m (94 kgf*cm, 81 ft.*lbf)

      Note

      Make sure that the tightening torque of the bolt B is between 6.4 and 12 N*m (65 and 122 kgf*cm, 57 and 106 in.*lbf).

    5. Disconnect the motor cable (for MG1) from the inverter with converter assembly.

    6. Check for arc marks at the terminals for the motor cable (for MG1).

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

    7. Connect the motor cable (for MG1) to the inverter with converter assembly.

    8. Install the inverter cover.

    9. Install the inverter terminal cover.


    B

    REPLACE MALFUNCTIONING PARTS

    C

    CONNECT SECURELY

    A

  6. CHECK HYBRID VEHICLE TRANSAXLE ASSEMBLY (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 ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. A004EQ3

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

    3. A004G00

      Remove the inverter cover from the inverter with converter assembly.

    4. A004FPX

      Disconnect the motor cable from the inverter with converter assembly.

    5. A004FZ9E01
      Text in Illustration
      *1 Shield Ground
      *a

      Motor Cable (for MG1)

      (Inverter with Converter Assembly Side)

      Check 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 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 Switch Condition Specified Condition
        W2-1 (W) - W2-2 (U) Ignition switch off 139.1 to 153.7 mΩ
        W2-2 (U) - W2-3 (V) Ignition switch off 139.1 to 153.7 mΩ
        W2-3 (V) - W2-1 (W) Ignition switch off 139.1 to 153.7 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)

    6. 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 Switch Condition Specified Condition
      W2-1 (W) - Body ground and shield ground Ignition switch off 100 MΩ or higher
      W2-2 (U) - Body ground and shield ground Ignition switch off 100 MΩ or higher
      W2-3 (V) - Body ground and shield ground Ignition switch off 100 MΩ or higher

    7. Connect the motor cable.

    8. Install the inverter cover.

    9. Install the inverter terminal cover.


    OK

    REFER TO REPLACE INVERTER WITH CONVERTER ASSEMBLY PARTS Click here

    NG

  7. CHECK HYBRID VEHICLE TRANSAXLE ASSEMBLY (MOTOR CABLE (FOR MG1) CONNECTION CONDITION)

    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 ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. Remove the inverter with converter assembly Click here.

    3. A004GAIE03

      Check that the bolts for the motor cable (for MG1) are tightened to the specified torque, the motor cable (for MG1) is connected securely, and there are no contact problems.

      Specified Condition
      Bolt A
      T=19.5 N*m (199 kgf*cm, 14 ft.*lbf)
      Bolt B
      T=10 N*m (102 kgf*cm, 7 ft.*lbf)

      Note


      • Make sure that the tightening torque of the bolt A is between 13.5 and 25 N*m (138 and 255 kgf*cm, 10 and 18 ft.*lbf).

      • Make sure that the tightening torque of the bolt B is between 8 and 12 N*m (82 and 122 kgf*cm, 71 and 106 in.*lbf).

    4. Disconnect the motor cable (for MG1) from the hybrid vehicle transaxle assembly.

    5. Check for arc marks at the terminals for the motor cable (for MG1).

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

    6. Connect the motor cable (for MG1) to the hybrid vehicle transaxle assembly.

    7. Install the inverter with converter assembly.


    B

    REPLACE MALFUNCTIONING PARTS

    C

    CONNECT SECURELY

    A

  8. 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 ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. Remove the motor cable Click here.

    3. A004GEFE01
      Text in Illustration
      *1 Shield ground
      *a

      Motor Cable (for MG1)

      (Inverter with Converter Assembly Side)
      *b

      Motor Cable (for MG1)

      (Hybrid Vehicle Transaxle Assembly Side)

      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 Switch Condition Specified Condition
      W2-1 (W) - Body ground and shield ground Ignition switch off 100 MΩ or higher
      W2-2 (U) - Body ground and shield ground Ignition switch off 100 MΩ or higher
      W2-3 (V) - Body ground and shield ground Ignition switch off 100 MΩ or higher

      Note

      Wrap the terminal of the motor cable (for MG1) 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 Switch Condition Specified Condition
      W2-1 (W) - W1-1 (W) Ignition switch off Below 1 Ω
      W2-2 (U) - W1-2 (U) Ignition switch off Below 1 Ω
      W2-3 (V) - W1-3 (V) Ignition switch off Below 1 Ω
      W2-1 (W) - W1-2 (U) Ignition switch off 100 MΩ or higher
      W2-2 (U) - W1-3 (V) Ignition switch off 100 MΩ or higher
      W2-3 (V) - W1-1 (W) Ignition switch off 100 MΩ or higher

    5. Install the motor cable.


    OK

    REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY Click here

    NG

    REPLACE MOTOR CABLE Click here

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

    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 ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. Disconnect the inverter with converter assembly connector.

    3. Disconnect the hybrid vehicle control ECU connector.

    4. Connect the cable to the negative (-) auxiliary battery terminal.

    5. Turn the ignition switch to ON (IG).

    6. Measure the voltage according to the value(s) in the table below.

      A004FE1E04
      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A33-31 (HSDN) or A27-12 (HSDN) - Body ground Ignition switch ON (IG) Below 1 V
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Inverter with Converter Assembly)
      *b

      Rear view of wire harness connector

      (to Hybrid Vehicle Control ECU)

      Note

      Turning the ignition switch to ON (IG) with the connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    7. Turn the ignition switch off.

    8. Disconnect the cable from the negative (-) auxiliary battery terminal.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A27-12 (HSDN) - A27-4 (+B1) Power switch off 10 kΩ or higher
      A27-12 (HSDN) - A27-6 (MREL) Power switch off 10 kΩ or higher
      A33-31 (HSDN) - A33-10 (+B) Power switch off 10 kΩ or higher
      A33-31 (HSDN) - A33-9 (+B2) Power switch off 10 kΩ or higher

    10. Connect the inverter with converter assembly connector.

    11. Connect the hybrid vehicle control ECU connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. CHECK INVERTER WITH CONVERTER ASSEMBLY

    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 ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. Disconnect the inverter with converter assembly connector.

    3. A004E6ME01
      Text in Illustration
      *a

      Component without harness connected

      (Inverter with Converter Assembly)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A33-31 (HSDN) - A33-10 (+B) Ignition switch off 5 kΩ or higher
      A33-31 (HSDN) - A33-9 (+B2) Ignition switch off 5 kΩ or higher

    4. Connect the inverter with converter assembly connector.


    OK

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

    NG

    REFER TO REPLACE INVERTER WITH CONVERTER ASSEMBLY PARTS Click here