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Home >> Lexus >> 2010 >> LS 600hL >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> Hybrid Vehicle Control (Diagnostic Codes (P0A1A-200 - P0A7A-344) >> Hybrid Control System >> DTC P0A78-128: Drive Motor "A" Inverter Performance >> Procedure

DTC P0A78-128: Drive Motor "A" Inverter Performance: Procedure

  1. CHECK DTC OUTPUT (HV) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
    4. Check if DTCs are output.

      Result

      Result Proceed to
      P3246-202 is not output. A
      P3246-202 is output. B

    B → See step   27 

    A: Go to next step 

  2. CHECK DTC OUTPUT (HV) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
    4. Check if DTCs are output.

      Result

      Result Proceed to
      P0A78-128 only is output. A
      Any of the following DTCs are also output. B
      DTC No. Relevant Diagnosis
      P0A1A (all INF codes) *1 Generator Control Module
      P0A1B (all INF codes) *1 Drive Motor "A" Control Module
      P0A1D (all INF codes) *1 Hybrid Powertrain Control Module
      P0A3F-243 Drive Motor "A" Position Sensor Circuit
      P0A40-500 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 Generator Position Sensor Circuit Range / Performance
      P0A4D-255 Generator Position Sensor Circuit Low
      P0A60 (all INF codes) *1 Drive Motor "A" Phase V Current
      P0A63 (all INF codes) *1 Drive Motor "A" Phase W Current
      P0A72 (all INF codes) *1 Generator Phase V Current
      P0A75 (all INF codes) *1 Generator Phase W Current
      P0A78-266, 267, 279, 287, 306, 503, 504, 505, 506, 586, 806, 807, 808 Drive Motor "A" Inverter Performance
      P0A7A-325, 344, 517, 518, 809, 810, 811 Generator Inverter Performance
      P0A90-509 Drive Motor "A" Performance
      P0A92-521 Hybrid Generator Performance
      P0A94-442, 547, 548, 549, 554, 555, 556, 585, 587, 589, 590 DC / DC Converter Performance
      P0ADB-227 Hybrid Battery Positive Contactor Control Circuit Low
      P0ADC-226 Hybrid Battery Positive Contactor Control Circuit High
      P0ADF-229 Hybrid Battery Negative Contactor Control Circuit Low
      P0AE0-228 Hybrid Battery Negative Contactor Control Circuit High
      P0C76-523 Hybrid Battery System Discharge Time Too Long
      P3004-803 High Voltage Power Resource

      HINT: 

      • *1: If any INF codes are output for this DTC, refer to the corresponding diagnostic flowchart.
      • P0A78-128 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.

    B → See step   22 

    A: Go to next step 

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

    Before disconnecting the connector, confirm that it is properly connected by checking that the locking claws are engaged and that the connector cannot be pulled out.

    1. Check the connection of the low voltage connector of the inverter with converter assembly.

      OK

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

      HINT: 

      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: Go to next step 

  4. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - GENERATOR RESOLVER) 
    WARNING:

    Be sure to wear insulated gloves.

    1. Turn the power switch off.
      Fig 1: Identifying A77 Connector Terminals
      GTY138639Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the service plug grip. Refer to PRECAUTION .
      NOTE:

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

    3. Disconnect the low voltage connector from the inverter with converter assembly.
    4. Turn the power switch on (IG).
    5. Measure the voltage according to the value(s) in the table below.

      Standard voltage

      Tester Connection Switch Condition Specified Condition
      A77-20 (GRF) - Body ground Power switch on (IG) Below 1 V
      A77-9 (GRFG) - Body ground Power switch on (IG) Below 1 V
      A77-18 (GSN) - Body ground Power switch on (IG) Below 1 V
      A77-7 (GSNG) - Body ground Power switch on (IG) Below 1 V
      A77-17 (GCS) - Body ground Power switch on (IG) Below 1 V
      A77-6 (GCSG) - Body ground Power switch on (IG) Below 1 V
      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.

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  5. CHECK GENERATOR RESOLVER 
    1. Turn the power switch off.
      Fig 2: Identifying A77 Connector Terminals
      GTY138639Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance (Check for open)

      Tester Connection Switch Condition Specified Condition
      A77-20 (GRF) - A77-9 (GRFG) Power switch off 4.2 to 12.5 Ω
      A77-18 (GSN) - A77-7 (GSNG) Power switch off 9.8 to 20.1 Ω
      A77-17 (GCS) - A77-6 (GCSG) Power switch off 9.8 to 20.1 Ω

      Standard resistance (Check for short)

      Tester Connection Switch Condition Specified Condition
      A77-20 (GRF) or A77-9 (GRFG) - Body ground and other terminals Power switch off 10 kΩ or higher
      A77-18 (GSN) or A77-7 (GSNG) - Body ground and other terminals Power switch off 10 kΩ or higher
      A77-17 (GCS) or A77-6 (GCSG) - Body ground and other terminals Power switch off 10 kΩ or higher

    NG → See step   14 

    OK: Go to next step 

  6. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - MOTOR RESOLVER) 
    1. Turn the power switch on (IG).
    2. Disconnect the low voltage connector from the inverter with converter assembly.
      Fig 3: Identifying A77 Connector Terminals
      GTY138876Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the voltage according to the value(s) in the table below.

      Standard voltage

      Tester Connection Switch Condition Specified Condition
      A77-40 (MRF) - Body ground Power switch on (IG) Below 1 V
      A77-29 (MRFG) - Body ground Power switch on (IG) Below 1 V
      A77-39 (MSN) - Body ground Power switch on (IG) Below 1 V
      A77-28 (MSNG) - Body ground Power switch on (IG) Below 1 V
      A77-38 (MCS) - Body ground Power switch on (IG) Below 1 V
      A77-27 (MCSG) - Body ground Power switch on (IG) Below 1 V
      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.

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  7. CHECK MOTOR RESOLVER 
    1. Turn the power switch off.
      Fig 4: Identifying A77 Connector Terminals
      GTY138876Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance (Check for open)

      Tester Connection Switch Condition Specified Condition
      A77-40 (MRF) - A77-29 (MRFG) Power switch off 4.5 to 16.8 Ω
      A77-39 (MSN) - A77-28 (MSNG) Power switch off 9.3 to 27.8 Ω
      A77-38 (MCS) - A77-27 (MCSG) Power switch off 12.4 to 30.7 Ω

      Standard resistance (Check for short)

      Tester Connection Switch Condition Specified Condition
      A77-40 (MRF) or A77-29 (MRFG) - Body ground and other terminals Power switch off 10 kΩ or higher
      A77-39 (MSN) or A77-28 (MSNG) - Body ground and other terminals Power switch off 10 kΩ or higher
      A77-38 (MCS) or A77-27 (MCSG) - Body ground and other terminals Power switch off 10 kΩ or higher

    NG → See step   16 

    OK: Go to next step 

  8. CHECK INVERTER WITH CONVERTER ASSEMBLY (GENERATOR CABLE CONNECTION CONDITION) 
    WARNING:

    Be sure to wear insulated gloves.

    1. Check that the service plug grip is not installed.
    2. Remove the inverter terminal cover from the inverter with converter assembly. Refer to REMOVAL .
      NOTE:

      Lift the inverter terminal cover horizontally so that it does not tilt. Failure to do so may break the inverter cover guide pins.

      Fig 5: Locating Service Plug
      GTY128397Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. 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.
      Fig 6: Locating Bolts For Generator Cable
      GTY148104Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Specified Condition

      T=8.0 N*m {82 kgf*cm, 71 in.*lbf}

      NOTE:

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

    4. Check for arc marks at the bolts 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

    C → CONNECT SECURELY 

    B → REPLACE MALFUNCTIONING PARTS 

    A: Go to next step 

  9. CHECK INVERTER WITH CONVERTER ASSEMBLY (MOTOR CABLE CONNECTION CONDITION) 
    WARNING:

    Be sure to wear insulated gloves.

    1. Check that the service plug grip is not installed.
      Fig 7: Identifying Generator Cable Bolts
      GTY148105Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. 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 bolts is between 6.4 and 9.6 N*m (65 and 98 kgf*cm, 57 and 85 in.*lbf).

    3. Check for arc marks at the bolts 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

    C → CONNECT SECURELY 

    B → REPLACE MALFUNCTIONING PARTS 

    A: Go to next step 

  10. CHECK HYBRID VEHICLE TRANSMISSION ASSEMBLY (MG1) 
    WARNING:

    Be sure to wear insulated gloves.

    1. Check that the service plug grip is not installed.
    2. Disconnect the generator cable and motor cable from the inverter with converter assembly.

      HINT: 

      For the removal and installation procedures related to the generator cable and motor cable. Refer to COMPONENTS .

    3. Check MG1 for an interphase short using a milliohmmeter.
      Fig 8: Identifying Generator Cable Pins
      GTY127247Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Using a milliohmmeter, measure the resistance according to the value(s) in the table below.

        HINT: 

        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
        U - V Power switch off 32.4 to 35.8 mΩ
        V - W Power switch off 31.3 to 34.6 mΩ
        W - U Power switch off 31.4 to 34.7 mΩ

        HINT: 

        • To correct the variation of the measured resistance due to temperature, use the following formula to calculate the resistance at 68° F (20°C).
          • R20 = Rt / {1 + 0.00393 X (T - 20)}
        • The calculation is based on the following:
          • R20: Resistance at 68° F (20°C) (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 Switch Condition Specified Condition
      U - Body ground and shielded wire ground Power switch off 100 MΩ or higher
      V - Body ground and shielded wire ground Power switch off 100 MΩ or higher
      W - Body ground and shielded wire ground Power switch off 100 MΩ or higher

    NG → See step   18 

    OK: Go to next step 

  11. CHECK HYBRID VEHICLE TRANSMISSION ASSEMBLY (MG2) 
    WARNING:

    Be sure to wear insulated gloves.

    1. Check that the service plug grip is not installed.
    2. Disconnect the generator cable and motor cable from the inverter with converter assembly.

      HINT: 

      For the removal and installation procedures related to the generator cable and motor cable. Refer to COMPONENTS .

    3. Check MG2 for an interphase short using a milliohmmeter.
      Fig 9: Identifying Motor Cable Pins
      GTY148125Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Using a milliohmmeter, measure the resistance according to the value(s) in the table below.

        HINT: 

        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 Switch Condition Specified Condition
        U - V Power switch off 46.9 to 51.8 mΩ
        V - W Power switch off 47.1 to 52.1 mΩ
        W - U Power switch off 46.8 to 51.8 mΩ

        HINT: 

        • To correct the variation of the measured resistance due to temperature, use the following formula to calculate the resistance at 68° F (20°C).
          • R20 = Rt / {1 + 0.00393 X (T - 20)}
        • The calculation is based on the following:
          • R20: Resistance at 68° F (20°C) (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 Switch Condition Specified Condition
      U - Body ground and shielded wire ground Power switch off 100 MΩ or higher
      V - Body ground and shielded wire ground Power switch off 100 MΩ or higher
      W - Body ground and shielded wire ground Power switch off 100 MΩ or higher

    NG → See step   20 

    OK: Go to next step 

  12. CHECK CONNECTOR CONNECTION CONDITION (GENERATOR RESOLVER CONNECTOR) 
    1. Check the connection of the generator resolver connector.

      OK

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

    NG → CONNECT SECURELY 

    OK: Go to next step 

  13. CHECK CONNECTOR CONNECTION CONDITION (MOTOR RESOLVER CONNECTOR) 
    1. Check the connection of the motor resolver connector.

      OK

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

    NG → CONNECT SECURELY 

    OK → See step   24 

  14. CHECK CONNECTOR CONNECTION CONDITION (GENERATOR RESOLVER CONNECTOR) 
    1. Check the connection of the generator resolver connector.

      OK

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

    NG → CONNECT SECURELY 

    OK: Go to next step 

  15. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY (MG ECU) - GENERATOR RESOLVER) 
    1. Disconnect the generator resolver connector.
    2. Measure the resistance according to the value(s) in the table below.
      Fig 10: Checking Harness And Connector (Inverter With Converter Assembly (MG ECU) -- Generator Resolver)
      GTY147716Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance (Check for open)

      Tester Connection Switch Condition Specified Condition
      A77-20 (GRF) - E59-1 (GRF) Power switch off Below 1 Ω
      A77-9 (GRFG) - E59-5 (GRFG) Power switch off Below 1 Ω
      A77-18 (GSN) - E59-2 (GSN) Power switch off Below 1 Ω
      A77-7 (GSNG) - E59-6 (GSNG) Power switch off Below 1 Ω
      A77-17 (GCS) - E59-3 (GCS) Power switch off Below 1 Ω
      A77-6 (GCSG) - E59-7 (GCSG) Power switch off Below 1 Ω

      Standard resistance (Check for short)

      Tester Connection Switch Condition Specified Condition
      A77-20 (GRF) or E59-1 (GRF) - Body ground and other terminals Power switch off 10 kΩ or higher
      A77-9 (GRFG) or E59-5 (GRFG) - Body ground and other terminals Power switch off 10 kΩ or higher
      A77-18 (GSN) or E59-2 (GSN) - Body ground and other terminals Power switch off 10 kΩ or higher
      A77-7 (GSNG) or E59-6 (GSNG) - Body ground and other terminals Power switch off 10 kΩ or higher
      A77-17 (GCS) or E59-3 (GCS) - Body ground and other terminals Power switch off 10 kΩ or higher
      A77-6 (GCSG) or E59-7 (GCSG) - Body ground and other terminals Power switch off 10 kΩ or higher

      HINT: 

      The generator resolver is not available separately. If it requires replacement, replace the hybrid vehicle transmission assembly.

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   23 

  16. CHECK CONNECTOR CONNECTION CONDITION (MOTOR RESOLVER CONNECTOR) 
    1. Check the connection of the motor resolver connector.

      OK

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

    NG → CONNECT SECURELY 

    OK: Go to next step 

  17. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY (MG ECU) - MOTOR RESOLVER) 
    1. Disconnect the motor resolver connector.
    2. Measure the resistance according to the value(s) in the table below.
      Fig 11: Checking Harness And Connector (Inverter With Converter Assembly (MG ECU) -- Motor Resolver)
      GTY147715Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance (Check for open)

      Tester Connection Switch Condition Specified Condition
      A77-40 (MRF) - E60-1 (MRF) Power switch off Below 1 Ω
      A77-29 (MRFG) - E60-5 (MRFG) Power switch off Below 1 Ω
      A77-39 (MSN) - E60-2 (MSN) Power switch off Below 1 Ω
      A77-28 (MSNG) - E60-6 (MSNG) Power switch off Below 1 Ω
      A77-38 (MCS) - E60-3 (MCS) Power switch off Below 1 Ω
      A77-27 (MCSG) - E60-7 (MCSG) Power switch off Below 1 Ω

      Standard resistance (Check for short)

      Tester Connection Switch Condition Specified Condition
      A77-40 (MRF) or E60-1 (MRF) - Body ground and other terminals Power switch off 10 kΩ or higher
      A77-29 (MRFG) or E60-5 (MRFG) - Body ground and other terminals Power switch off 10 kΩ or higher
      A77-39 (MSN) or E60-2 (MSN) - Body ground and other terminals Power switch off 10 kΩ or higher
      A77-28 (MSNG) or E60-6 (MSNG) - Body ground and other terminals Power switch off 10 kΩ or higher
      A77-38 (MCS) or E60-3 (MCS) - Body ground and other terminals Power switch off 10 kΩ or higher
      A77-27 (MCSG) or E60-7 (MCSG) - Body ground and other terminals Power switch off 10 kΩ or higher

      HINT: 

      The motor resolver is not available separately. If it requires replacement, replace the hybrid vehicle transmission assembly.

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   23 

  18. CHECK HYBRID VEHICLE TRANSMISSION ASSEMBLY (GENERATOR CABLE CONNECTION CONDITION) 
    1. Remove the hybrid vehicle transmission assembly. Refer to COMPONENTS .
      Fig 12: Locating Generator Cable Bolts
      GTY124309Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. 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 bolts is between 6.4 and 9.6 N*m (65 and 98 kgf*cm, 57 and 85 in.*lbf).

    3. Check for arc marks at the bolts 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

    C → CONNECT SECURELY 

    B → REPLACE MALFUNCTIONING PARTS 

    A: Go to next step 

  19. CHECK GENERATOR CABLE 
    1. Remove the generator cable from the hybrid vehicle transmission assembly. Refer to COMPONENTS .
    2. Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below.
      Fig 13: Identifying Generator Cable
      GTY148117Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      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
      U - Shielded wire ground Power switch off 100 MΩ or higher
      V - Shielded wire ground Power switch off 100 MΩ or higher
      W - Shielded wire ground Power switch off 100 MΩ or higher
      U - V Power switch off 100 MΩ or higher
      V - W Power switch off 100 MΩ or higher
      W - U Power switch off 100 MΩ or higher
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Condition Specified Condition
      U - U Power switch off 1 Ω or less
      V - V Power switch off 1 Ω or less
      W - W Power switch off 1 Ω or less

    NG → See step   25 

    OK → See step   23 

  20. CHECK HYBRID VEHICLE TRANSMISSION ASSEMBLY (MOTOR CABLE CONNECTION CONDITION) 
    1. Remove the hybrid vehicle transmission assembly. Refer to COMPONENTS .
      Fig 14: Locating Motor Cable Bolts
      GTY124480Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. 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 bolts is between 6.4 and 9.6 N*m (65 and 98 kgf*cm, 57 and 85 in.*lbf).

    3. Check for arc marks at the bolts for the motor cable.

      Result

      OK 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

    C → CONNECT SECURELY 

    B → REPLACE MALFUNCTIONING PARTS 

    A: Go to next step 

  21. CHECK MOTOR CABLE 
    1. Remove the motor cable from the hybrid vehicle transmission assembly. Refer to COMPONENTS .
    2. Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below.
      Fig 15: Identifying Motor Cable
      GTY128811Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      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
      U - Shielded wire ground Power switch off 100 MΩ or higher
      V - Shielded wire ground Power switch off 100 MΩ or higher
      W - Shielded wire ground Power switch off 100 MΩ or higher
      U - V Power switch off 100 MΩ or higher
      V - W Power switch off 100 MΩ or higher
      W - U Power switch off 100 MΩ or higher
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Condition Specified Condition
      U - U Power switch off 1 Ω or less
      V - V Power switch off 1 Ω or less
      W - W Power switch off 1 Ω or less

    NG → See step   26 

    OK → See step   23 

  22. GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART 
  23. REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY. Refer to  COMPONENTS 
  24. REPLACE INVERTER WITH CONVERTER ASSEMBLY. Refer to  COMPONENTS 
  25. REPLACE GENERATOR CABLE. Refer to  COMPONENTS 
  26. REPLACE MOTOR CABLE. Refer to  COMPONENTS 
  27. GO TO OUTPUT DTC. Refer to  DTC P3246-202: Short in Drive Motor "A" Inverter Circuit 
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