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Home >> Toyota >> 2012 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 114 (Hybrid Vehicle Control System (Diagnostic Codes (P0069-273 - P0A63-502)) (Hybrid)) >> Hybrid Control System >> DTC P0A08-264: DC / DC Converter Status Circuit >> Procedure

DTC P0A08-264: DC / DC Converter Status Circuit: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK DTC OUTPUT (HV) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
    4. Check if DTCs are output.

      Result

      Result Proceed to
      DTC P0A08-264 only is output. A
      Any of the following DTCs are also output. B
      DTC No. Relevant Diagnosis
      P0A93-346 Inverter Cooling System Performance
      P0A94-547, 548, 549 DC / DC Converter Performance
      P0AA6-526, 613, 655 Hybrid Battery Voltage System Isolation Fault
      P0ADB-227 Hybrid Battery Positive Contactor Control Circuit Low
      P0ADF-229 Hybrid Battery Negative Contactor Control Circuit Low
      P0AE6-225 Hybrid Battery Precharge Contactor Control Circuit Low
      P0C73-776 Motor Electronics Coolant Pump "A" Control Performance
      P3004-131, 803 Power Cable Malfunction
      P314A-828 Inverter Coolant Pump Speed Signal
    5. Turn the ignition switch off.

    B → See step   33 

    A: Go to next step 

  2. CHECK FUSE (IGCT NO. 2) 
    1. Disconnect the cable from the negative auxiliary battery terminal.
    2. Remove the IGCT NO. 2 fuse from the engine room relay block No. 2.
    3. Measure the resistance according to the value(s) in the table below.
      Fig 1: Identifying IGCT NO. 2 Fuse
      GTY307702Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      IGCT NO. 2 fuse terminals Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *1 Engine Room Relay Block No. 2
      *2 IGCT NO. 2 Fuse
    4. Install the IGCT NO. 2 fuse.

    NG → See step   27 

    OK: Go to next step 

  3. CHECK FUSE (DCDC-S) 
    1. Remove the DCDC-S fuse from the fusible link block assembly.
      Fig 2: Identifying DCDC-S Fuse
      GTY305284Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      DCDC-S fuse terminals Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *1 DCDC-S fuse
      *2 Fusible Link Block Assembly
    3. Install the DCDC-S fuse.

    NG → See step   29 

    OK: Go to next step 

  4. CHECK FUSIBLE LINK BLOCK ASSEMBLY (MAIN) 
    1. Disconnect connector O57 from the fusible link block assembly.
      Fig 3: Identifying Fusible Link Block Assembly (MAIN)
      GTY298126Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      Terminal A - Terminal B Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *1 Fusible Link Block Assembly
    3. Connect the fusible link block assembly connector.

    NG → REPLACE FUSIBLE LINK BLOCK ASSEMBLY (MAIN) 

    OK: Go to next step 

  5. CHECK FUSIBLE LINK BLOCK ASSEMBLY (DCDC, HV R/B NO. 1) 
    1. Check the fusible links (DCDC and HV R/B NO. 1) in the engine room relay block assembly for improper installation and for open circuits.

      OK

      The fusible links are installed securely. There are no open circuits.

    NG → REPLACE FUSIBLE LINK BLOCK ASSEMBLY (DCDC, HV R/B NO. 1) 

    OK: Go to next step 

  6. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR) See step   3 

    NG → CONNECT SECURELY 

    OK: Go to next step 

  7. CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR) See step   4 

    NG → CONNECT SECURELY 

    OK: Go to next step 

  8. CHECK CABLE AND WIRE HARNESS 
    WARNING:

    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 information because this may cause a malfunction.

    2. Remove the inverter terminal cover from the inverter with converter assembly.
      Fig 4: Identifying Inverter Terminal Cover, The Inverter With Converter Assembly & Bolts
      GTY273338Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Using a megohmmeter set to 500 V, measure the insulation resistance according to the value(s) in the table below.
      Fig 5: Checking Cable And Wire Harness
      GTY297367Courtesy 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
      z28-3 (U) - Body ground and shield ground Ignition switch off 1 MΩ or higher
      z28-2 (V) - Body ground and shield ground Ignition switch off 1 MΩ or higher
      z28-1 (W) - Body ground and shield ground Ignition switch off 1 MΩ or higher
      z26-3 (U) - Body ground and shield ground Ignition switch off 1 MΩ or higher
      z26-2 (V) - Body ground and shield ground Ignition switch off 1 MΩ or higher
      z26-1 (W) - Body ground and shield ground Ignition switch off 1 MΩ or higher
      TEXT IN ILLUSTRATION

      *1 Three-phase AC Cable for MG1
      *2 Three-phase AC Cable for MG2

      HINT: 

      Perform this inspection while the three-phase AC cables for MG1 and for MG2 are connected.

    4. Install the inverter terminal cover to the inverter with converter assembly.

    NG → See step   18 

    OK: Go to next step 

  9. CHECK AMD TERMINAL 
    WARNING:

    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 information because this may cause a malfunction.

    2. Check that the nuts for the AMD terminals are tightened to the specified torque, the AMD terminals are connected securely, and there are no contact problems.
      Fig 6: Identifying AMD Terminals & Fasteners
      GTY303569Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Torque: 8.35 N*m (85 kgf*cm, 

      Result

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

    B → CONNECT SECURELY 

    C → REPLACE MALFUNCTIONING PARTS 

    A: Go to next step 

  10. CHECK TERMINAL VOLTAGE (AMD TERMINAL) 
    WARNING:

    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 information because this may cause a malfunction.

    2. Connect the cable to the negative auxiliary battery terminal.
    3. Measure the voltage according to the value(s) in the table below.
      Fig 7: Identifying AMD Terminals & Fasteners
      GTY303570Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      AMD terminal (Inverter with converter assembly side) - Body ground Ignition switch off 11 to 14 V

    NG → See step   21 

    OK: Go to next step 

  11. CHECK HARNESS AND CONNECTOR 
    WARNING:

    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 information because this may cause a malfunction.

    2. Disconnect the A64 connector from the inverter with converter assembly.
    3. Turn the ignition switch to ON.

      HINT: 

      Turning the ignition switch to ON with the service grip removed causes interlock switch system DTC P0A0D-350 to be output.

    4. Measure the voltage according to the value(s) in the table below.
      Fig 8: Checking Harness And Connector (Inverter With Converter Assembly - IGCT)
      GTY298209Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      A64-25 (IGCT) - Body ground Ignition switch ON 11 to 14 V
      A64-36 (S) - Body ground Ignition switch ON 11 to 14 V
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Inverter with Converter Assembly)
    5. Turn the ignition switch off.
    6. Connect the inverter with converter assembly connector.

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  12. CHECK HYBRID VEHICLE CONTROL ECU 
    1. Disconnect the A64 connector from the inverter with converter assembly.
    2. Measure the resistance according to the value(s) in the table below.
      Fig 9: Checking Hybrid Vehicle Control ECU Resistance
      GTY306653Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      A64-24 (NODD) - Body ground Ignition switch off 120 to 140 kΩ
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Inverter with Converter Assembly)
    3. Connect the inverter with converter assembly connector.

    NG → See step   22 

    OK: Go to next step 

  13. CHECK DC/DC CONVERTER FUNCTION 

    HINT: 

    The current at the AMD terminal cannot be measured directly because of space limitations. Measure the current flowing from the auxiliary battery instead.

    1. Connect a AC/DC 400 A probe to the positive auxiliary battery line.
    2. Install the service plug grip.
    3. Turn the ignition switch to ON (READY) and leave the vehicle as it is until the electric current flowing into the auxiliary battery becomes 10 A or less.
    4. Measure the current flowing from the auxiliary battery with the ignition switch ON (READY), the headlight position switch and blower motor switch in the HI position, and the rear window defogger turned on.
      Fig 10: Identifying AC/DC 400 A Probe & Positive Auxiliary Battery Line
      GTY299222Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 11: Identifying AC/DC 400 A Probe & Positive Auxiliary Battery Line
      GTY294867Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Current

      Item Switch Condition Specified Condition
      Current flowing from auxiliary battery Ignition switch ON (READY)
      (The headlight position switch and blower motor switch are in the HI position, and the rear window defogger is turned on.)
      0 A or less (no current from auxiliary battery)
    5. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      Auxiliary battery voltage Ignition switch ON (READY)
      (The headlight position switch and blower motor switch are in the HI position, and the rear window defogger is turned on.)
      13 to 15 V
    6. Turn the ignition switch off.

    NG → See step   34 

    OK: Go to next step 

  14. CHECK QUANTITY OF HV COOLANT See step   3 

    B → See step   35 

    C → See step   36 

    A: Go to next step 

  15. CHECK COOLANT HOSE See step   4 

    NG → CORRECT THE PROBLEM 

    OK: Go to next step 

  16. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE ELECTRIC COOLING FAN) See step   5 

    NG → See step   37 

    OK: Go to next step 

  17. CHECK HV COOLANT (CHECK FOR CONDITIONS THAT MAY HAVE CAUSED FREEZING) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Read the freeze frame data item Ambient Temperature using the Techstream.
    4. Check if the freeze frame data item ambient Temperature is below freezing.

      Result

      Result Proceed to
      Ambient Temperature value is above freezing temperature of HV coolant. A
      Ambient Temperature value is below freezing temperature of HV coolant. B

      HINT: 

      • HV coolant (SLLC) with a 30% concentration freezes at 5°F (-15°C) and HV coolant (SLLC) with a 50% concentration freezes at -31°F (-35°C).
      • If the HV coolant freezes in the HV radiator or inverter water pump assembly (w/ motor), the coolant temperature in the inverter with converter assembly rises because the HV coolant cannot circulate. As a result, a DTC may be set.
      • A DTC is set when the inverter water pump assembly (w/ motor) impeller cannot rotate due to freezing of the HV coolant.
      • If a DTC is set due to freezing of HV coolant, the problem cannot be reproduced. Judge whether freezing of HV coolant occurred according to the freeze point of the HV coolant, HV coolant change history and ambient temperature when the DTC was set.
    5. Turn the ignition switch off.

    B → See step   23 

    A → See step   34 

  18. CHECK HYBRID VEHICLE TRANSAXLE ASSEMBLY (MG1) 
    WARNING:

    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 information because this may cause a malfunction.

    2. Remove the inverter terminal cover from the inverter with converter assembly.
      Fig 12: Identifying Inverter Terminal Cover, The Inverter With Converter Assembly & Bolts
      GTY273338Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Disconnect the three-phase AC cables for MG1 from the inverter with converter assembly.
      Fig 13: Identifying Three-Phase AC Cables & Inverter With Converter Assembly
      GTY301967Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Three-phase AC Cables for MG1
    4. Using a megohmmeter set to 500 V, measure the insulation resistance according to the value(s) in the table below.
      Fig 14: Identifying Three-Phase AC Cables for MG1
      GTY303934Courtesy 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
      z28-3 (U) - Body ground and shield ground Ignition switch off 100 MΩ or higher
      z28-2 (V) - Body ground and shield ground Ignition switch off 100 MΩ or higher
      z28-1 (W) - Body ground and shield ground Ignition switch off 100 MΩ or higher
      TEXT IN ILLUSTRATION

      *1 Three-phase AC Cables for MG1
      *a Shield Ground
    5. Connect the three-phase AC cables for MG1 to the inverter with converter assembly.
    6. Install the inverter terminal cover to the inverter with converter assembly.

    NG → See step   38 

    OK: Go to next step 

  19. CHECK HYBRID VEHICLE TRANSAXLE ASSEMBLY (MG2) 
    WARNING:

    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 information because this may cause a malfunction.

    2. Remove the inverter terminal cover from the inverter with converter assembly.
      Fig 15: Identifying Inverter Terminal Cover, The Inverter With Converter Assembly & Bolts
      GTY273338Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Disconnect the three-phase AC cables for MG2 from the inverter with converter assembly.
      Fig 16: Identifying Three-Phase AC Cables For MG2 & Converter Assembly
      GTY307593Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Three-phase AC Cables for MG2
    4. Using a megohmmeter set to 500 V, measure the insulation resistance according to the value(s) in the table below.
      Fig 17: Identifying Three-Phase AC Cables For MG1
      GTY305744Courtesy 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
      z26-3 (U) - Body ground and shield ground Ignition switch off 100 MΩ or higher
      z26-2 (V) - Body ground and shield ground Ignition switch off 100 MΩ or higher
      z26-1 (W) - Body ground and shield ground Ignition switch off 100 MΩ or higher
      TEXT IN ILLUSTRATION

      *1 Three-phase AC Cables for MG2
      *a Shield Ground
    5. Connect the three-phase AC cables for MG2 to the inverter with converter assembly.
    6. Install the inverter terminal cover to the inverter with converter assembly.

    NG → See step   38 

    OK: Go to next step 

  20. CHECK REAR TRACTION MOTOR WITH TRANSAXLE ASSEMBLY 
    WARNING:

    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 information because this may cause a malfunction.

    2. Remove the inverter terminal cover from the inverter with converter assembly.
      Fig 18: Identifying Inverter Terminal Cover, The Inverter With Converter Assembly & Bolts
      GTY273338Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Disconnect the No. 3 wire frame from the inverter with converter assembly.
      Fig 19: Identifying No. 3 Wire Frame, Converter Assembly & Fasteners
      GTY304046Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Three-phase AC Cable for MGR
    4. Using a megohmmeter set to 500 V, measure the insulation resistance according to the value(s) in the table below.
      Fig 20: Identifying Three-Phase AC Cables for MGR
      GTY297554Courtesy 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
      j9-3 (R-U) - Body ground and shield ground Ignition switch off 10 MΩ or higher
      j9-2 (R-V) - Body ground and shield ground Ignition switch off 10 MΩ or higher
      j9-1 (R-W) - Body ground and shield ground Ignition switch off 10 MΩ or higher
      TEXT IN ILLUSTRATION

      *1 Three-phase AC Cable for MGR
      *a Shield Ground
    5. Connect the No. 3 wire frame to the inverter with converter assembly.
    6. Install the inverter terminal cover to the inverter with converter assembly.

    NG → See step   25 

    OK → See step   34 

  21. CHECK AMD TERMINAL (ENGINE ROOM JUNCTION BLOCK ASSEMBLY SIDE) 
    WARNING:

    Be sure to wear insulated gloves.

    1. Measure the voltage according to the value(s) in the table below.
      Fig 21: Identifying AMD Terminal (Engine Room Junction Block Assembly Side)
      GTY303571Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      AMD terminal (Engine room junction block assembly side) - Body ground Ignition switch off 11 to 14 V

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   34 

  22. INSPECT HYBRID VEHICLE CONTROL ECU 
    1. Disconnect all the connectors from the hybrid vehicle control ECU.
      Fig 22: Checking Hybrid Vehicle Control ECU
      GTY302583Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      A65-21 (NODD) - D72-6 (E1) Ignition switch off 120 to 140 kΩ
      TEXT IN ILLUSTRATION

      *a Component without harness connected
      (Hybrid Vehicle Control ECU)
    3. Connect the hybrid vehicle control ECU connectors.

    NG → See step   39 

    OK → REPAIR OR REPLACE HARNESS OR CONNECTOR 

  23. REPLACE HV COOLANT See step   7 

    NEXT: Go to next step 

  24. CHECK INVERTER WATER PUMP ASSEMBLY (W/ MOTOR) See step   8 

    NG → See step   40 

    OK → COMPLETED 

  25. CHECK NO. 3 WIRE FRAME (REAR MOTOR CABLE) 
    WARNING:

    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 information because this may cause a malfunction.

    2. Disconnect the No. 3 wire frame from the rear traction motor with transaxle assembly.
      Fig 23: Identifying Rear Motor Cable & Fasteners
      GTY307515Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Remove the inverter terminal cover from the inverter with converter assembly.
      Fig 24: Identifying Inverter Terminal Cover, The Inverter With Converter Assembly & Bolts
      GTY273338Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Disconnect the No. 3 wire frame from the inverter with converter assembly.
      Fig 25: Identifying No. 3 Wire Frame, Converter Assembly & Fasteners
      GTY304046Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Three-phase AC Cable for MGR
    5. Using a megohmmeter set to 500 V, measure the insulation resistance according to the value(s) in the table below.
      Fig 26: Identifying Three-Phase AC Cables for MGR
      GTY306812Courtesy 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
      j9-3 (R-U) - Body ground and shield ground Ignition switch off 10 MΩ or higher
      j9-2 (R-V) - Body ground and shield ground Ignition switch off 10 MΩ or higher
      j9-1 (R-W) - Body ground and shield ground Ignition switch off 10 MΩ or higher
      TEXT IN ILLUSTRATION

      *1 Three-phase AC Cable for MGR
      *a Shield Ground
    6. Connect the No. 3 wire frame to the rear traction motor with transaxle assembly.
    7. Connect the No. 3 wire frame to the inverter with converter assembly.
    8. Install the inverter terminal cover to the inverter with converter assembly.

    NG → See step   41 

    OK: Go to next step 

  26. CHECK EXTENSION WIRE ASSEMBLY 
    1. Remove the rear traction motor with transaxle assembly. Refer to REMOVAL .
    2. Remove the extension wire assembly from the rear traction motor with transaxle assembly.
    3. Using a megohmmeter set to 500 V, measure the insulation resistance according to the value(s) in the table below.
      Fig 27: Identifying Extension Wire Assembly
      GTY307201Courtesy 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
      R-U - Shield shell Ignition switch off 100 MΩ or higher
      R-V - Shield shell Ignition switch off 100 MΩ or higher
      R-W - Shield shell Ignition switch off 100 MΩ or higher
      TEXT IN ILLUSTRATION

      *1 Extension Wire Assembly
      *a Shield Shell
    4. Install the extension wire assembly to the rear traction motor with transaxle assembly.
    5. Install the rear traction motor with transaxle assembly.

    NG → See step   42 

    OK → See step   43 

  27. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - IGCT NO. 2 FUSE) 
    WARNING:

    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 information because this may cause a malfunction.

    2. Disconnect the A64 connector from the inverter with converter assembly.
    3. Remove the IGCT NO. 2 fuse from the engine room relay block No. 2.
    4. Measure the resistance according to the value(s) in the table below.
      Fig 28: Checking Harness And Connector (Inverter With Converter Assembly - IGCT No. 2 Fuse)
      GTY300741Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      A64-25 (IGCT) or 2 (IGCT NO. 2 fuse) - Body ground and other terminals Ignition switch off 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 Engine Room Relay Block No. 2
      *2 IGCT NO. 2 Fuse
      *a Front view of wire harness connector
      (to Inverter with Converter Assembly)
    5. Install the IGCT NO. 2 fuse.
    6. Connect the inverter with converter assembly connector.

    NG → See step   31 

    OK: Go to next step 

  28. REPLACE INVERTER WITH CONVERTER ASSEMBLY 
    1. Replace the inverter with converter assembly. Refer to REMOVAL .

    NEXT → REPLACE FUSE (IGCT NO. 2) 

  29. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - DCDC-S FUSE) 
    WARNING:

    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 information because this may cause a malfunction.

    2. Disconnect the A64 connector from the inverter with converter assembly.
    3. Disconnect the O57 connector from the fusible link block assembly.
    4. Measure the resistance according to the value(s) in the table below.
      Fig 29: Checking Harness And Connector (Inverter With Converter Assembly - DCDC-S Fuse)
      GTY299789Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      A64-36 (S) or O57-1 - Body ground and other terminals Ignition switch off 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Inverter with Converter Assembly)
      *b Front view of wire harness connector
      (to Fusible Link Block Assembly)
    5. Connect the fusible link block assembly connector.
    6. Connect the inverter with converter assembly connector.

    NG → See step   32 

    OK: Go to next step 

  30. REPLACE INVERTER WITH CONVERTER ASSEMBLY 
    1. Replace the inverter with converter assembly. Refer to REMOVAL .

    NEXT → REPLACE FUSE (DCDC-S) 

  31. REPAIR OR REPLACE HARNESS OR CONNECTOR 

    NEXT → REPLACE FUSE (IGCT NO. 2) 

  32. REPAIR OR REPLACE HARNESS OR CONNECTOR 

    NEXT → REPLACE FUSE (DCDC-S) 

  33. GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART 
  34. REPLACE INVERTER WITH CONVERTER ASSEMBLY. Refer to  REMOVAL 
  35. ADD HV COOLANT. Refer to  REPLACEMENT - Step 3 
  36. INSPECT FOR COOLANT LEAK AND ADD COOLANT. Refer to  REPLACEMENT - Step 4 
  37. CHECK COOLING FAN SYSTEM. Refer to  Cooling Fan Circuit 
  38. REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY. Refer to  REMOVAL 
  39. REPLACE HYBRID VEHICLE CONTROL ECU. Refer to  REMOVAL 
  40. REPLACE INVERTER WATER PUMP ASSEMBLY (W/ MOTOR). Refer to  REMOVAL 
  41. REPLACE NO. 3 WIRE FRAME. Refer to  REMOVAL 
  42. REPLACE EXTENSION WIRE ASSEMBLY. Refer to  REMOVAL 
  43. REPLACE REAR TRACTION MOTOR WITH TRANSAXLE ASSEMBLY. Refer to  REMOVAL