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HYBRID CONTROL SYSTEM, Diagnostic DTC:P0A94-172

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Info Added 2017-08-02

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DTC Code DTC Name
P0A94-172 DC / DC Converter Performance
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DESCRIPTION

For a description of the boost converter (Click here).

If a malfunction occurs in the boost converter, the MG ECU detects it and transmits this information to the hybrid vehicle control ECU assembly.

DTC No. INF Code DTC Detection Condition Trouble Area
P0A94 172 Boost converter fail signal detection (overcurrent by system malfunction)

  • Wire harness or connector

  • Hybrid vehicle transaxle assembly

  • Inverter with converter assembly

  • INV fuse

  • Hybrid vehicle control ECU assembly
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WIRING DIAGRAM

Refer to the wiring diagram for DTC P1CAC-200 (Click here).

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

Refer to the wiring diagram for DTC P324E-788 (Click here).

Refer to the wiring diagram for DTC U0110-159 (Click here).

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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).

    Tip:

    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).

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PROCEDURE


  1. Click here

    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.

      Result
      Result Proceed to
      P0A94-172 only is output, or DTCs except 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
      P0A78-113, 128, 279, 284, 286, 287, 548, 555, 807 Drive Motor "A" Inverter Performance
      P0A7A-122, 130, 322, 324, 325, 810 Generator Inverter Performance
      P0A90-509 Drive Motor "A" Performance
      P0A92-521 Hybrid Generator Performance
      P0AA6-526 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
      P0C19-306 Drive Motor "A" Torque Delivered Performance
      P0C76-523 Hybrid Battery System Discharge Time Too Long
      P0CA3-442 DC/DC Converter Step Up Voltage Performance
      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 Voltage Sensor Circuit High
      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
      P0E71-344 Generator Torque Delivered Performance
      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
      P3133-659 Communication Error from Generator to Drive Motor "A"
      P3134-661 Communication Error from Drive Motor "A" to Generator
      Tip:

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

      • P0A94-172 may be stored due to a malfunction which also causes DTCs in the preceding table to be stored. 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 power switch off.


  2. Click here

    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. A00046KE03

      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.
      Tip:

      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.


  3. Click here

    CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - GENERATOR RESOLVER)

    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 D3 inverter with converter assembly connector.

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

    4. Turn the power switch on (IG).

    5. B001VF3E02

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      D3-1 (GRF) - Body ground Power switch on (IG) Below 1 V
      D3-7 (GRFG) - Body ground Power switch on (IG) Below 1 V
      D3-2 (GSN) - Body ground Power switch on (IG) Below 1 V
      D3-8 (GSNG) - Body ground Power switch on (IG) Below 1 V
      D3-3 (GCS) - Body ground Power switch on (IG) Below 1 V
      D3-9 (GCSG) - Body ground Power switch on (IG) Below 1 V
      Table 1. Text in Illustration
      *a

      Front view of wire harness connector

      (to Inverter with Converter Assembly)
      Note:

      Turning the power switch on (IG) with the low voltage connector of the inverter with converter assembly disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    6. Turn the power switch off.

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

    8. Reconnect the D3 inverter with converter assembly connector.


    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  4. Click here

    CHECK GENERATOR RESOLVER

    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 D3 inverter with converter assembly connector.

    3. B001VF3E02

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D3-1 (GRF) - D3-7 (GRFG) Power switch off 4.2 to 12.5 Ω
      D3-2 (GSN) - D3-8 (GSNG) Power switch off 9.8 to 20.1 Ω
      D3-3 (GCS) - D3-9 (GCSG) Power switch off 9.8 to 20.1 Ω
      Tip:

      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 (°F).)

      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      D3-1 (GRF) or D3-7 (GRFG) - Body ground and other terminals Power switch off 1 MΩ or higher
      D3-2 (GSN) or D3-8 (GSNG) - Body ground and other terminals Power switch off 1 MΩ or higher
      D3-3 (GCS) or D3-9 (GCSG) - Body ground and other terminals Power switch off 1 MΩ or higher
      Table 2. Text in Illustration
      *a

      Front view of wire harness connector

      (to Inverter with Converter Assembly)

    4. Reconnect the D3 inverter with converter assembly connector.


  5. Click here

    CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - MOTOR RESOLVER)

    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 D3 inverter with converter assembly connector.

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

    4. Turn the power switch on (IG).

    5. B001VCME02

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      D3-4 (MRF) - Body ground Power switch on (IG) Below 1 V
      D3-11 (MRFG) - Body ground Power switch on (IG) Below 1 V
      D3-5 (MSN) - Body ground Power switch on (IG) Below 1 V
      D3-12 (MSNG) - Body ground Power switch on (IG) Below 1 V
      D3-6 (MCS) - Body ground Power switch on (IG) Below 1 V
      D3-13 (MCSG) - Body ground Power switch on (IG) Below 1 V
      Table 3. Text in Illustration
      *a

      Front view of wire harness connector

      (to Inverter with Converter Assembly)
      Note:

      Turning the power switch on (IG) with the low voltage connector of the inverter with converter assembly disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    6. Turn the power switch off.

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

    8. Reconnect the D3 inverter with converter assembly connector.


    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  6. Click here

    CHECK MOTOR RESOLVER

    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 D3 inverter with converter assembly connector.

    3. B001VCME02

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D3-4 (MRF) - D3-11 (MRFG) Power switch off 4.2 to 12.5 Ω
      D3-5 (MSN) - D3-12 (MSNG) Power switch off 9.8 to 20.1 Ω
      D3-6 (MCS) - D3-13 (MCSG) Power switch off 9.8 to 20.1 Ω
      Tip:

      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 (°F).)

      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      D3-4 (MRF) or D3-11 (MRFG) - Body ground and other terminals Power switch off 1 MΩ or higher
      D3-5 (MSN) or D3-12 (MSNG) - Body ground and other terminals Power switch off 1 MΩ or higher
      D3-6 (MCS) or D3-13 (MCSG) - Body ground and other terminals Power switch off 1 MΩ or higher
      Table 4. Text in Illustration
      *a

      Front view of wire harness connector

      (to Inverter with Converter Assembly)

    4. Reconnect the D3 inverter with converter assembly connector.


  7. Click here

    CHECK INVERTER WITH CONVERTER ASSEMBLY (GENERATOR CABLE 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 power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. B001VFZ

      Remove the upper inverter cover (generator cable side) from the inverter with converter assembly.

    3. B001VBO

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

      Specified Condition
      T=8.0 N*m (82 kgf*cm, 71 in.*lbf)
      Note:

      Make sure that the tightening torque of the bolt is between 6.4 and 9.6 N*m (65 and 98 kgf*cm, 57 and 85 in.*lbf).

    4. Disconnect the generator cable from the inverter with converter assembly.

    5. Check for arc marks at the terminals for the generator cable.

      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 generator cable to the inverter with converter assembly.

    7. Install the upper inverter cover (generator cable side).


    • AClick here
    • B

      REPLACE MALFUNCTIONING PARTS

    • C

      CONNECT SECURELY

  8. Click here

    CHECK INVERTER WITH CONVERTER ASSEMBLY (MOTOR CABLE 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 power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. B001VC0

      Remove the upper inverter cover (motor cable side) from the inverter with converter assembly.

    3. B001VFI

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

      Specified Condition
      T=8.0 N*m (82 kgf*cm, 71 in.*lbf)
      Note:

      Make sure that the tightening torque of the bolt is between 6.4 and 9.6 N*m (65 and 98 kgf*cm, 57 and 85 in.*lbf).

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

    5. Check for arc marks at the terminals for the motor cable.

      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 to the inverter with converter assembly.

    7. Install the upper inverter cover (motor cable side).


    • AClick here
    • B

      REPLACE MALFUNCTIONING PARTS

    • C

      CONNECT SECURELY

  9. Click here

    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 power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. B001VFH

      Remove the upper inverter cover (generator cable side) and upper inverter cover (motor cable side) from the inverter with converter assembly.

    3. B001VFDE02

      Disconnect the generator cable and motor cable from the inverter with converter assembly.

      Table 5. Text in Illustration
      *1 Generator Cable
      *2 Motor Cable
    4. B001VH3E01

      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.

        Tip:

        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 Condition Specified Condition
        e1-1 (W) - e1-3 (U) Power switch off 59.1 to 67.5 mΩ
        e1-2 (V) - e1-1 (W) Power switch off 59.1 to 67.5 mΩ
        e1-3 (U) - e1-2 (V) Power switch off 62.1 to 70.5 mΩ
        Table 6. Text in Illustration
        *1 Shield Ground
        *a

        Generator Cable

        (Inverter with Converter Assembly Side)
        Tip:

        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
      e1-1 (W) - Body ground and shield ground Power switch off 100 MΩ or higher
      e1-2 (V) - Body ground and shield ground Power switch off 100 MΩ or higher
      e1-3 (U) - Body ground and shield ground Power switch off 100 MΩ or higher

    6. Connect the generator cable and motor cable.

    7. Install the upper inverter cover (generator cable side) and upper inverter cover (motor cable side).


  10. Click here

    CHECK HYBRID VEHICLE TRANSAXLE ASSEMBLY (MG2)

    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. B001VFH

      Remove the upper inverter cover (generator cable side) and upper inverter cover (motor cable side) from the inverter with converter assembly.

    3. B001VFDE02

      Disconnect the generator cable and motor cable from the inverter with converter assembly.

      Table 7. Text in Illustration
      *1 Generator Cable
      *2 Motor Cable
    4. B001VF9E01

      Check MG2 for an interphase short using a milliohmmeter.


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

        Tip:

        If the MG2 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
        d1-1 (W) - d1-3 (U) Power switch off 71.4 to 81.0 mΩ
        d1-2 (V) - d1-1 (W) Power switch off 71.4 to 81.0 mΩ
        d1-3 (U) - d1-2 (V) Power switch off 74.4 to 84.1 mΩ
        Table 8. Text in Illustration
        *1 Shield Ground
        *a

        Motor Cable

        (Inverter with Converter Assembly Side)
        Tip:

        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
      d1-1 (W) - Body ground and shield ground Power switch off 100 MΩ or higher
      d1-2 (V) - Body ground and shield ground Power switch off 100 MΩ or higher
      d1-3 (U) - Body ground and shield ground Power switch off 100 MΩ or higher

    6. Connect the generator cable and motor cable.

    7. Install the upper inverter cover (generator cable side) and upper inverter cover (motor cable side).


  11. Click here

    CHECK FUSE (INV)


    1. B001VFFE03

      Remove the INV fuse from the No. 2 engine room relay block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      INV fuse terminal Always Below 1Ω
      Table 9. Text in Illustration
      *1 No. 2 Engine Room Relay Block
      *2 INV fuse

    3. Install the INV fuse.


  12. Click here

    CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY POWER SOURCE CIRCUIT)

    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 A14 inverter with converter assembly connector.

    3. B001VITE03

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A14-10 (GND1) - Body ground Power switch off Below 1 Ω
      A14-11 (GND2) - Body ground Power switch off Below 1 Ω
      Table 10. Text in Illustration
      *a

      Front view of wire harness connector

      (to Inverter with Converter Assembly)

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

    5. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A14-30 (+B) - Body ground Power switch on (IG) 11 to 14 V
      A14-31 (+B2) - Body ground Power switch on (IG) 11 to 14 V
      Note:

      Turning the power switch on (IG) with the inverter with converter assembly connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    7. Turn the power switch off.

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

    9. Reconnect the A14 inverter with converter assembly connector.


    • OKClick here
    • NG

      REPAIR OR REPLACE POWER SOURCE CIRCUIT

  13. Click here

    CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - 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 power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. Disconnect the A79 hybrid vehicle control ECU assembly connector.

    3. Disconnect the A14 inverter with converter assembly connector.

    4. B001VEAE04

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      A79-24 (HTM+) - A14-9 (HTM+) Power switch off Below 1 Ω
      A79-25 (HTM-) - A14-20 (HTM-) Power switch off Below 1 Ω
      A79-23 (MTH+) - A14-8 (MTH+) Power switch off Below 1 Ω
      A79-22 (MTH-) - A14-19 (MTH-) Power switch off Below 1 Ω
      A79-31 (REQ+) - A14-26 (REQ+) Power switch off Below 1 Ω
      A79-30 (REQ-) - A14-37 (REQ-) Power switch off Below 1 Ω
      A79-33 (CLK+) - A14-7 (CLK+) Power switch off Below 1 Ω
      A79-32 (CLK-) - A14-18 (CLK-) Power switch off Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      A79-24 (HTM+) or A14-9 (HTM+) - Body ground and other terminals Power switch off 10 kΩ or higher
      A79-25 (HTM-) or A14-20 (HTM-) - Body ground and other terminals Power switch off 10 kΩ or higher
      A79-23 (MTH+) or A14-8 (MTH+) - Body ground and other terminals Power switch off 10 kΩ or higher
      A79-22 (MTH-) or A14-19 (MTH-) - Body ground and other terminals Power switch off 10 kΩ or higher
      A79-31 (REQ+) or A14-26 (REQ+) - Body ground and other terminals Power switch off 10 kΩ or higher
      A79-30 (REQ-) or A14-37 (REQ-) - Body ground and other terminals Power switch off 10 kΩ or higher
      A79-33 (CLK+) or A14-7 (CLK+) - Body ground and other terminals Power switch off 10 kΩ or higher
      A79-32 (CLK-) or A14-18 (CLK-) - Body ground and other terminals Power switch off 10 kΩ or higher
      Table 11. Text in Illustration
      *a

      Rear view of wire harness connector

      (to Hybrid Vehicle Control ECU Assembly)
      *b

      Front view of wire harness connector

      (to Inverter with Converter Assembly)

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

    6. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A79-24 (HTM+) or A14-9 (HTM+) - Body ground Power switch on (IG) Below 1 V
      A79-25 (HTM-) or A14-20 (HTM-) - Body ground Power switch on (IG) Below 1 V
      A79-23 (MTH+) or A14-8 (MTH+) - Body ground Power switch on (IG) Below 1 V
      A79-22 (MTH-) or A14-19 (MTH-) - Body ground Power switch on (IG) Below 1 V
      A79-31 (REQ+) or A14-26 (REQ+) - Body ground Power switch on (IG) Below 1 V
      A79-30 (REQ-) or A14-37 (REQ-) - Body ground Power switch on (IG) Below 1 V
      A79-33 (CLK+) or A14-7 (CLK+) - Body ground Power switch on (IG) Below 1 V
      A79-32 (CLK-) or A14-18 (CLK-) - Body ground Power switch on (IG) Below 1 V
      Note:

      Turning the power switch on (IG) with the hybrid vehicle control ECU assembly and inverter with converter assembly connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    8. Turn the power switch off.

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

    10. Reconnect the A14 inverter with converter assembly connector.

    11. Reconnect the A79 hybrid vehicle control ECU assembly connector.


    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  14. Click here

    CHECK HYBRID VEHICLE CONTROL ECU ASSEMBLY


    1. Disconnect the A79 hybrid vehicle control ECU assembly connector.

    2. B001VHCE02

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A79-24 (HTM+) - A79-25 (HTM-) Power switch off 80 to 170 Ω
      A79-23 (MTH+) - A79-22 (MTH-) Power switch off 80 to 170 Ω
      A79-31 (REQ+) - A79-30 (REQ-) Power switch off 80 to 170 Ω
      A79-33 (CLK+) - A79-32 (CLK-) Power switch off 80 to 170 Ω
      Table 12. Text in Illustration
      *a

      Component without harness connected

      (Hybrid Vehicle Control ECU Assembly)

    3. Reconnect the A79 hybrid vehicle control ECU assembly connector.


  15. Click here

    CHECK CONNECTOR CONNECTION CONDITION (GENERATOR RESOLVER CONNECTOR)


    1. B001VD0

      Check the connection of the generator resolver connector.

      OK
      The connector is connected securely and there are no contact problems.

  16. Click here

    CHECK CONNECTOR CONNECTION CONDITION (MOTOR RESOLVER CONNECTOR)


    1. B001VHU

      Check the connection of the motor resolver connector.

      OK
      The connector is connected securely and there are no contact problems.

    • OK

      REPLACE INVERTER WITH CONVERTER ASSEMBLY (Click here)

    • NG

      CONNECT SECURELY

  17. Click here

    CHECK CONNECTOR CONNECTION CONDITION (GENERATOR RESOLVER CONNECTOR)


    1. B001VD0

      Check the connection of the generator resolver connector.

      OK
      The connector is connected securely and there are no contact problems.

  18. Click here

    INSPECT HYBRID VEHICLE TRANSAXLE ASSEMBLY (GENERATOR RESOLVER)


    1. B001VD0E08

      Disconnect the D12 generator resolver connector.

    2. B001VHYC01
      *a

      Component without harness connected

      (Generator Resolver (Hybrid Vehicle Transaxle Assembly))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D12-1 (GRF) - D12-6 (GRFG) Power switch off 5.8 to 11.8 Ω
      D12-2 (GSN) - D12-7 (GSNG) Power switch off 11.7 to 17.7 Ω
      D12-3 (GCS) - D12-8 (GCSG) Power switch off 11.7 to 17.7 Ω
      Tip:

      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 (°F).)

      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      D12-1 (GRF) - Body ground and other terminals (except 6 (GRFG)) Power switch off 1 MΩ or higher
      D12-6 (GRFG) - Body ground and other terminals (except 1 (GRF)) Power switch off 1 MΩ or higher
      D12-2 (GSN) - Body ground and other terminals (except 7 (GSNG)) Power switch off 1 MΩ or higher
      D12-7 (GSNG) - Body ground and other terminals (except 2 (GSN)) Power switch off 1 MΩ or higher
      D12-3 (GCS) - Body ground and other terminals (except 8 (GCSG)) Power switch off 1 MΩ or higher
      D12-8 (GCSG) - Body ground and other terminals (except 3 (GCS)) Power switch off 1 MΩ or higher
      Tip:

      The generator resolver is not available as a supply part. If it requires replacement, replace the hybrid vehicle transaxle assembly.

    3. Reconnect the D12 generator resolver connector.


    • OK

      REPAIR OR REPLACE HARNESS OR CONNECTOR

    • NG

      REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY (Click here)

  19. Click here

    CHECK CONNECTOR CONNECTION CONDITION (MOTOR RESOLVER CONNECTOR)


    1. B001VHU

      Check the connection of the motor resolver connector.

      OK
      The connector is connected securely and there are no contact problems.

  20. Click here

    INSPECT HYBRID VEHICLE TRANSAXLE ASSEMBLY (MOTOR RESOLVER)


    1. B001VHUE03

      Disconnect the D11 motor resolver connector.

    2. B001VC9C05
      *a

      Component without harness connected

      (Motor Resolver (Hybrid Vehicle Transaxle Assembly))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D11-1 (MRF) - D11-4 (MRFG) Power switch off 5.8 to 11.8 Ω
      D11-2 (MSN) - D11-5 (MSNG) Power switch off 11.7 to 17.7 Ω
      D11-3 (MCS) - D11-6 (MCSG) Power switch off 11.7 to 17.7 Ω
      Tip:

      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 (°F).)

      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      D11-1 (MRF) - Body ground and other terminals (except 4 (MRFG)) Power switch off 1 MΩ or higher
      D11-4 (MRFG) - Body ground and other terminals (except 1 (MRF)) Power switch off 1 MΩ or higher
      D11-2 (MSN) - Body ground and other terminals (except 5 (MSNG)) Power switch off 1 MΩ or higher
      D11-5 (MSNG) - Body ground and other terminals (except 2 (MSN)) Power switch off 1 MΩ or higher
      D11-3 (MCS) - Body ground and other terminals (except 6 (MCSG)) Power switch off 1 MΩ or higher
      D11-6 (MCSG) - Body ground and other terminals (except 3 (MCS)) Power switch off 1 MΩ or higher
      Tip:

      The motor resolver is not available as a supply part. If it requires replacement, replace the hybrid vehicle transaxle assembly.

    3. Reconnect the D11 motor resolver connector.


    • OK

      REPAIR OR REPLACE HARNESS OR CONNECTOR

    • NG

      REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY (Click here)

  21. Click here

    CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - INV FUSE)

    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 A14 inverter with converter assembly connector.

    3. B001VBGE01

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A14-30 (+B) - Body ground Power switch off 10 kΩ or higher
      A14-31 (+B2) - Body ground Power switch off 10 kΩ or higher
      Table 13. Text in Illustration
      *a

      Front view of wire harness connector

      (to Inverter with Converter Assembly)

    4. Reconnect the A14 inverter with converter assembly connector.


  22. Click here

    REPLACE INVERTER WITH CONVERTER ASSEMBLY

    (Click here)


    • NEXT

      REPLACE FUSE (INV)

  23. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR


    • NEXT

      REPLACE FUSE (INV)