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Home >> Lexus >> 2007 >> RX 400h AWD >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> Hybrid Vehicle Control (P310) - RX400H - DTC P0A7A-309 Through P0A94-589 >> DTC P0A94-554 DC / DC Converter Performance; DTC P0A94-555 DC / DC Converter Performance >> Inspection Procedure

Inspection Procedure

CAUTION:
  • Before inspecting the high-voltage system, take safety precautions to prevent electrical shocks, such as wearing insulated gloves and removing the service plug grip. After removing the service plug grip, put it in your pocket to prevent other technicians from reconnecting it while you are working on the high-voltage system.
  • After disconnecting the service plug grip, wait for at least 5 minutes before touching any of the high-voltage connectors or terminals.

HINT:

At least 5 minutes is required to discharge the high-voltage capacitor inside the w/ converter inverter assembly.

  1. READ OUTPUT DTC (HV) 
    1. Connect the intelligent tester to the DLC3.
    2. Turn the ignition switch to the ON position.
    3. Select the following menu items: DIAGNOSIS / OBD/ MOBD / HV ECU / DTC INFO / CURRENT CODES.
    4. Read output DTC. (See DTC CHECK / CLEAR )

      Result: 

      The DTCs shown in the table below are output 

      DTCS RESULT DESCRIPTION

      DTC No. Relevant Diagnosis
      P0A1D HV ECU circuit malfunction
      P0A2B, P0A2C, P0A2D Motor temperature sensor circuit
      P0A37, P0A38, P0A39 Generator temperature sensor circuit
      P0A3F, P0A40, P0A41 Motor resolver circuit
      P0A4B, P0A4C, P0A4D Generator resolver circuit
      P0A60, P0A63 Motor current sensor circuit
      P0A72, P0A75 Generator current sensor circuit
      P0A78 Motor inverter function malfunction
      P0A7A Generator inverter function malfunction
      P0A90 Motor function malfunction
      P0A92 Generator function malfunction
      P0A94 (Except for 554 and 555), P3227, P3228 Boost converter circuit
      P0ADB, P0ADC, P0ADF, P0AE0, P0AE6, P0AE7 System main relay circuit
      P0AA6, P3004 High-voltage system
      P0A79 Rear motor inverter function malfunction
      P0A45, P0A46, P0A47 Rear motor resolver malfunction
      P0A69, P0A6C, P0A55 Rear motor current sensor circuit
      P0AF8 Hybrid battery system voltage

      HINT:

      • Turning the ignition switch to the ON position with the service plug grip and inverter cover removed causes interlock switch system DTC PGA0D-350 to be output.
      • P0A94-554 and P0A94-555 may be output due to a malfunction which causes the DTCs in the table above to be output. In this case, first troubleshoot the output DTCs in the table above. Then, perform a reproduction test to check that no DTCs are output.

    YES: GO TO  DTC CHART 

    NO: Go to next step 

  2. CHECK CONNECTION CONDITION OF MG ECU CONNECTOR (LOOSENESS AND POOR CONTACT) 
    CAUTION: Be sure to wear insulated gloves.
    1. Turn the ignition switch off and remove the service plug grip. (See HYBRID CONTROL SYSTEM )
      NOTE: Do not put the vehicle into the READY-on state with the service plug grip removed as this may cause a malfunction.
    2. Remove the inverter cover. (See INVERTER WITH CONVERTER )
      NOTE:
      • Wrap the interlock round terminal for the inverter cover with vinyl tape to prevent it from shorting to ground.
      • Prevent water in the reservoir tank from entering the inverter.
      • Removing the inverter cover causes the MG ECU board to be exposed. Therefore, temporarily install the inverter cover for each area to be inspected.
    3. Check the connections of the MG ECU connectors.

      OK: Connectors are connected securely and there is no poor connection. 

    NG: CONNECT SECURELY 

    Fig 1: Identifying MG ECU Connectors Terminals
    G05201254Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step 

  3. INSPECT HYBRID VEHICLE TRANSAXLE ASSEMBLY (MOTOR) 
    CAUTION: Be sure to wear insulated gloves.
    1. Check that the service plug grip is removed.
    2. Disconnect the three-phase AC cable for Motor from the w/ converter inverter assembly.
      Fig 2: Locating Three-Phase AC Cable Terminals For Motor
      G05201359Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Using a milliohmmeter, measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      U - V 48 to 59 mΩ (20°C)
      V - W 48 to 59 mΩ (20°C)
      W - U 48 to 59 mΩ (20°C)
      Fig 3: Identifying Shielded Wire Ground
      G05201360Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE: If the Motor temperature is too high, the resistance changes greatly. Therefore, measure the resistance at least 8 hours after the vehicle is stopped.
    4. To correct the resistance varying depending on the temperature, use the following formula to calculate the resistance at 20°C.

      HINT:

      • R20 = Rt / {1 + 0.00393 X (T - 20)}
      • R20: Resistance at 20°C (mΩ)
      • Rt: Measured resistance (mΩ)
      • T: Temperature when the resistance is measured (°C)
    5. Calculate the difference between the maximum and minimum resistance.

      Standard Resistance: 

      Difference is 5 mΩ or less 

    6. Using a megohmmeter, measure the insulation 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 AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      U - Body ground and shielded wire ground 10 MΩ or higher
      V - Body ground and shielded wire ground 10 MΩ or higher
      W - Body ground and shielded wire ground 10 MΩ or higher

    NG: REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY 

    OK: Go to next step 

  4. INSPECT HYBRID VEHICLE TRANSAXLE ASSEMBLY (GENERATOR) 
    CAUTION: Be sure to wear insulated gloves.
    1. Check that the service plug grip is removed.
    2. Disconnect the three-phase AC cable for Generator from the w/ converter inverter assembly.
      Fig 4: Locating Three-Phase AC Cable Terminals For Generator
      G05201547Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Using a milliohmmeter, measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      U - V 109 mΩ or less (20°C)
      V - W 109 mΩ or less (20°C)
      W - U 109 mΩ or less (20°C)
      Fig 5: Identifying Three-Phase AC Cables Terminals For Generator
      G05201449Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE: If the Generator temperature is too high, the resistance varies greatly. Therefore, measure the resistance at least 8 hours after the vehicle is stopped.
    4. To correct the resistance varying depending on the temperature, use the following formula to calculate the resistance at 20°C.

      HINT:

      • R20 = Rt / {1 + 0.00393 X (T - 20)}
      • R20: Resistance at 20°C (mΩ)
      • Rt: Measured resistance (mΩ)
      • T: Temperature when the resistance is measured (°C)
    5. Calculate the difference between the maximum and minimum resistance.

      Standard Resistance: 

      Difference is 3 mΩ or less 

    6. Using a megohmmeter, measure the insulation 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 AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      U - Body ground and shielded wire ground 10 MΩ or higher
      V - Body ground and shielded wire ground 10 MΩ or higher
      W - Body ground and shielded wire ground 10 MΩ or higher

    NG: REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY 

    OK: Go to next step 

  5. INSPECT REAR TRACTION MOTOR W/ TRANSAXLE ASSEMBLY 
    CAUTION: Be sure to wear insulated gloves.
    1. Check that the service plug grip is removed.
    2. Disconnect the three-phase AC cable for Rear Motor from the w/ converter inverter assembly.
      Fig 6: Identifying Three-Phase AC Cable For Rear Motor
      G05278670Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Using a milliohmmeter, measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      U - V 109 mΩ or less (20°C)
      V - W 109 mΩ or less (20°C)
      W - U 109 mΩ or less (20°C)
      Fig 7: Identifying Three-Phase AC Cable Terminals For Rear Motor
      G05201485Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE: If the Rear Motor temperature is too high, the resistance varies greatly. Therefore, measure the resistance at least 8 hours after the vehicle is stopped.
    4. To correct the resistance varying depending on the temperature, use the following formula to calculate the resistance at 20°C.

      HINT:

      • R20 = Rt / {1 + 0.00393 X (T - 20)}
      • R20: Resistance at 20°C (mΩ)
      • Rt: Measured resistance (mΩ)
      • T: Temperature when the resistance is measured (°C)
    5. Calculate the difference between the maximum and minimum resistance.

      Standard Resistance: 

      Difference is 5 mΩ or less 

    6. Using a megohmmeter, measure the insulation 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 AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      U - Body ground and shielded wire ground 10 MΩ or higher
      V - Body ground and shielded wire ground 10 MΩ or higher
      W - Body ground and shielded wire ground 10 MΩ or higher

    NG: GO TO step   16 

    OK: Go to next step 

  6. CHECK HARNESS AND CONNECTOR (MG ECU - MOTOR RESOLVER) 
    CAUTION: Be sure to wear insulated gloves.
    1. Check that the service plug grip is removed.
    2. Disconnect the I22 connector from the MG ECU.
    3. Measure the voltage according to the value(s) in the table below when the ignition switch is in the ON position.

      Standard Voltage 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      MRF (I22-13) - Body ground Below 1 V
      MRFG (I22-23) - Body ground Below 1 V
      MSN (I22-21) - Body ground Below 1 V
      MSNG (I22-20) - Body ground Below 1 V
      MCS (I22-19) - Body ground Below 1 V
      MCSG (I22-18) - Body ground Below 1 V
      Fig 8: Checking Harness And Connector (MG ECU - Motor Resolver)
      G05278641Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE: Turning the ignition switch to the ON position with the MG ECU connectors disconnected causes other DTCs to be stored. Clear the DTCs after performing the inspection.
    4. Turn the ignition switch off.
    5. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      MRF (I22-13) - MRFG (I22-23) 7.65 to 10.2 Ω
      MSN (I22-21) - MSNG (I22-20) 12.6 to 16.8 Ω
      MCS (I22-19) - MCSG (I22-18) 12.6 to 16.8 Ω
    6. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      MRF (I22-13) or MRFG (I22-23) - Body ground 10 kΩ or higher
      MSN (I22-21) or MSNG (I22-20) - Body ground 10 kΩ or higher
      MCS (I22-19) or MCSG (I22-18) - Body ground 10 kΩ or higher

    NG: GO TO step   13 

    OK: Go to next step 

  7. CHECK HARNESS AND CONNECTOR (MG ECU - GENERATOR RESOLVER) 
    CAUTION: Be sure to wear insulated gloves.
    1. Check that the service plug grip is removed.
    2. Disconnect the I22 connector from the MG ECU.
    3. Measure the voltage according to the value(s) in the table below when the ignition switch is in the ON position.

      Standard Resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      GRF (I22-12) - Body ground Below 1 V
      GRFG (I22-22) - Body ground Below 1 V
      GSN (I22-11) - Body ground Below 1 V
      GSNG (I22-10) - Body ground Below 1 V
      GCS (I22-9) - Body ground Below 1 V
      GCSG (I22-8) - Body ground Below 1 V
      Fig 9: Checking Harness And Connector (MG ECU - Generator Resolver)
      G05278413Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE: Turning the ignition switch to the ON position with the MG ECU connectors disconnected causes other DTCs to be stored. Clear the DTCs after performing the inspection.
    4. Turn the ignition switch off.
    5. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      GRF (I22-12) - GRFG (I22-22) 7.65 to 10.2 Ω
      GSN (I22-11) - GSNG (I22-10) 12.6 to 16.8 Ω
      GCS (I22-9) - GCSG (I22-8) 12.6 to 16.8 Ω
    6. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      GRF (I22-12) or GRFG (I22-22) - Body ground 10 kΩ or higher
      GSN (I22-11) or GSNG (I22-10) - Body ground 10 kΩ or higher
      GCS (I22-9) or GCSG (I22-8) - Body ground 10 kΩ or higher

    NG: GO TO step   14 

    OK: Go to next step 

  8. CHECK HARNESS AND CONNECTOR (MG ECU - REAR MOTOR RESOLVER) 
    CAUTION: Be sure to wear insulated gloves.
    1. Check that the service plug grip is removed.
    2. Disconnect the I21 connector from the MG ECU.
    3. Measure the voltage according to the value(s) in the table below when the ignition switch is in the ON position.

      Standard Voltage 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      RRF (I21-21) - Body ground Below 1 V
      RRFG (I21-22) - Body ground Below 1 V
      RSN (I21-29) - Body ground Below 1 V
      RSNG (I21-30) - Body ground Below 1 V
      RCS (I21-11) - Body ground Below 1 V
      RCSG (I21-23) - Body ground Below 1 V
      Fig 10: Disconnecting I21 Connector From MG ECU
      G05278504Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE: Turning the ignition switch to the ON position with the MG ECU connectors disconnected causes other DTCs to be stored. Clear the DTCs after performing the inspection.
    4. Turn the ignition switch off.
    5. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      RRF (I21-21) - RRFG (I21-22) 7.65 to 10.2 Ω
      RSN (I21-29) - RSNG (I21-30) 12.6 to 16.8 Ω
      RCS (I21-11) - RCSG (I21-23) 12.6 to 16.8 Ω
    6. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      RRF (I21-21) or RRFG (I21-22) - Body ground 10 kΩ or higher
      RSN (I21-29) or RSNG (I21-30) - Body ground 10 kΩ or higher
      RCS (I21-11) or RCSG (I21-23) - Body ground 10 kΩ or higher

    NG: GO TO step   15 

  9. CHECK AMOUNT OF GASOLINE 
    1. Turn the ignition switch to the ON position. Check the amount of fuel with the fuel gauge in the meter.

      OK: Proper amount of fuel is in the tank. 

    NG: REFUEL GASOLINE AND GO TO STEP   10 

    OK: Go to next step 

  10. CHECK ENGINE START 
    1. Put the vehicle into the READY-on state.
    2. Depress the accelerator pedal with the shift lever in the P position.

      OK: The engine starts. 

    NG: GO TO step   12 

    OK: Go to next step 

  11. CHECK ENGINE IDLING 
    1. Turn the ignition switch off.
    2. Connect the intelligent tester to the DLC3.
    3. Put the vehicle into the READY-on state.
    4. Leave the vehicle as it is until the engine automatically starts.

      HINT:

      Leaving the vehicle with the A/C switch in the MAX COOL position makes it easier for the engine to start.

    5. Select the following menu items: DIAGNOSIS / OBD / MOBD / HV ECU / DTC INFO / CURRENT CODES.
    6. Read output DTC. (See DTC CHECK / CLEAR ).

      OK: No DTCs are output 1 minute after the engine is started. 

    NG: GO TO  DTC CHART 

    OK: LEAVE VEHICLE IN P POSITION, AND CHARGE HV BATTERY IN IDLE STATUS UNTIL IDLING STOPS 

  12. READ OUTPUT DTC (HV) 
    1. Connect the intelligent tester to the DLC3.
    2. Turn the ignition switch to the ON position.
    3. Select the following menu items: DIAGNOSIS / OBD/ MOBD / HV ECU / DTC INFO / CURRENT CODES.
    4. Read output DTC. (See DTC CHECK / CLEAR )

      Result: 

      DTC other than P0494 is not output. 

    NO: GO TO  DTC CHART 

    YES: REPLACE W/ CONVERTER INVERTER ASSEMBLY 

  13. INSPECT MOTOR RESOLVER 
    1. Disconnect the M14 motor resolver connector.
      Fig 11: Locating Motor Resolver Connector
      G05201331Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      MRF (M14-1) - MRFG (M14-4) 7.65 to 10.2 Ω
      MSN (M14-2) - MSNG (M14-5) 12.6 to 16.8 Ω
      MCS (M14-3) - MCSG (M14-6) 12.6 to 16.8 Ω
    3. Using a megohmmeter, measure the insulation resistance according to the value(s) in the table below.
      Fig 12: Identifying M14 Terminals Of Motor Resolver Connector
      G05278417Courtesy 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 AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      MRF (M14-1) - MSN (M14-2) 10 MΩ or higher
      MRF (M14-1) - MCS (M14-3) 10 MΩ or higher
      MSN (M14-2) - MCS (M14-3) 10 MΩ or higher
      MRFG (M14-4) - MSNG (M14-5) 10 MΩ or higher
      MRFG (M14-4) - MCSG(M14-6) 10 MΩ or higher
      MSNG (M14-5) - MCSG (M14-6) 10 MΩ or higher
      Each terminal listed above - Transaxle housing 10 MΩ or higher

    NG: REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY 

    OK: REPAIR OR REPLACE HARNESS OR CONNECTOR 

  14. INSPECT GENERATOR RESOLVER 
    1. Remove the w/ converter inverter assembly.
    2. Disconnect the M13 generator resolver connector.
      Fig 13: Locating Generator Resolver Connector
      G05201323Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      GRF (M13-1) - GRFG (M13-6) 7.65 to 10.2 Ω
      GSN (M13-2) - GSNG (M13-7) 12.6 to 16.8 Ω
      GCS (M13-3) - GCSG (M13-8) 12.6 to 16.8 Ω
    4. Using a megohmmeter, measure the insulation resistance according to the value(s) in the table below.
      Fig 14: Identifying M13 Generator Resolver Connector
      G05278414Courtesy 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 AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      GRF (M13-1) - GSN (M13-2) 10 MΩ or higher
      GRF (M13-1) - GCS (M13-3) 10 MΩ or higher
      GSN (G13-2) - GCS (M13-3) 10 MΩ or higher
      GRFG (M13-6) - GSNG (M13-7) 10 MΩ or higher
      GRFG (M13-6) - GCSG (M13-8) 10 MΩ or higher
      GSNG (M13-7) - GCSG (M13-8) 10 MΩ or higher
      Each terminal listed above - Transaxle housing 10 MΩ or higher

    NG: REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY 

    OK: REPAIR OR REPLACE HARNESS OR CONNECTOR 

  15. INSPECT REAR MOTOR RESOLVER 
    1. Disconnect the M18 rear motor resolver connector.
      Fig 15: Locating Rear Motor Resolver Connector
      G05201336Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      RRF (M18-1) - RRFG (M18-4) 7.65 to 10.2 Ω
      RSN (M18-2) - RSNG (M18-5) 12.6 to 16.8 Ω
      RCS (M18-3) - RCSG (M18-6) 12.6 to 16.8 Ω
    3. Using a megohmmeter, measure the insulation resistance according to the value(s) in the table below.
      Fig 16: Identifying M18 Rear Motor Resolver Connector
      G05278458Courtesy 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 AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      RRF (M18-1) - RSN (M18-2) 10 MΩ or higher
      RRF (M18-1) - RCS (M18-3) 10 MΩ or higher
      RSN (M18-2) - RCS (M18-3) 10 MΩ or higher
      RRFG (M18-4) - RSNG (M18-5) 10 MΩ or higher
      RRFG (M18-4) - RCSG (M18-6) 10 MΩ or higher
      RSNG (M18-5) - RCSG (M18-6) 10 MΩ or higher
      Each terminal listed above - Transaxle housing 10 MΩ or higher

    NG: REPLACE REAR TRACTION MOTOR W/ TRANSAXLE ASSEMBLY 

    OK: REPAIR OR REPLACE HARNESS OR CONNECTOR 

  16. INSPECT FRAME WIRE NO.3 
    CAUTION: Be sure to wear insulated gloves.
    1. Check that the service plug grip is removed.
    2. Disconnect the frame wire No.3 from the rear traction motor w/ transaxle assembly.
      Fig 17: Locating Frame Wire No.3 Bolts
      G05201272Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Using a megohmmeter, measure the insulation 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 AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      U - Body ground and shielded wire ground 10 MΩ or higher
      V - Body ground and shielded wire ground 10 MΩ or higher
      W - Body ground and shielded wire ground 10 MΩ or higher
      NOTE: Wrap the terminals U, V and W of the w/ converter inverter assembly side No.3 wire frame (three-phase AC cable of the rear traction motor w/ transaxle assembly) with the insulating tape to prevent them from shorting to ground.
    4. Measure the resistance according to the value(s) in the table below.
      Fig 18: Identifying Shielded Wire Ground
      G05201437Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      U - V 10 kΩ or higher
      U-W 10 kΩ or higher
      V - W 10 kΩ or higher

    NG: REPLACE FRAME WIRE NO.3 

    OK: Go to next step 

  17. INSPECT EXTENSION WIRE ASSEMBLY 
    1. Remove the rear traction motor w/ transaxle assembly. (See REMOVAL )
    2. Remove the extension wire assembly from the rear traction motor w/ transaxle assembly. (See REMOVAL )
    3. Using a megohmmeter, measure the insulation 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 AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      U - Shield shell 10 MΩ or higher
      V - Shield shell 10 MΩ or higher
      W - Shield shell 10 MΩ or higher
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      U - U Below 1 Ω
      V - V Below 1 Ω
      W - W Below 1 Ω

    NG: REPLACE EXTENSION WIRE ASSEMBLY 

    Fig 19: Identifying Extension Wire Assembly Terminals
    G05201410Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPLACE REAR TRACTION MOTOR W/ TRANSAXLE ASSEMBLY 

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