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DTC P1F32-00: DC/DC Converter Cooling System Performance [08/2023 - ]: Procedure

WARNING: This page is about a different car, the 2025 Lexus RX 450h+ and 2024 Lexus RX 450h+. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK DTC OUTPUT (HYBRID CONTROL) 
    1. Check for DTCs.

      Powertrain > Hybrid Control > Trouble Codes 

      Result

      Result Proceed to
      P1F32-00 only is output. A
      DTCs except P1F32-00 are output. B
    2. Turn the ignition switch off.

    Result: 

    B 

    GO TO DTC CHART (HYBRID CONTROL SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2023 - 10/2024]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2024 - ] 

    Result: 

    A 

    See step  2

  2. CHECK NO. 1 DC/DC CONVERTER INTAKE FILTER 

    Pre-procedure1

    1. Remove the battery service hole cover.

      Refer to REMOVAL [08/2023 - ]

      Procedure1

    2. Check whether the No. 1 DC/DC converter intake filter is blocked with dust.

      OK

      The No. 1 DC/DC converter intake filter is not blocked with dust

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    3. Install the battery service hole cover.

    Result: 

    NG 

    CLEAN NO. 1 DC/DC CONVERTER INTAKE FILTER 

    Result: 

    OK 

    See step  3

  3. CHECK CONNECTOR CONNECTION CONDITION (DC/DC CONVERTER COOLING BLOWER ASSEMBLY CONNECTOR) 
    1. Check the connection condition of the DC/DC converter cooling blower assembly connector and the contact pressure of each terminal.

      Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [10/2022 - ]

      OK

      The terminals are not deformed and are connected securely.

      GTY1204958Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    CONNECT SECURELY 

    Result: 

    OK 

    See step  4

  4. CHECK CONNECTOR CONNECTION CONDITION (DC/DC CONVERTER ASSEMBLY CONNECTOR) 
    1. Check the connection condition of the DC/DC converter assembly connector and the contact pressure of each terminal.

      Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [10/2022 - ]

      OK

      The terminals are not deformed and are connected securely.

      GTY1203736Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    CONNECT SECURELY 

    Result: 

    OK 

    See step  5

  5. INSPECT DC/DC CONVERTER COOLING BLOWER ASSEMBLY 

    Pre-procedure1

    1. Remove the battery service hole cover.

      Refer to REMOVAL [08/2023 - ]

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

      Procedure1

    3. Check that the cooling blower is operating and rotating from the intake duct.

      Result

      Result Proceed to
      Cooling blower fan operate A
      Cooling blower fan does not operate B

      Post-procedure1

    4. Install the battery service hole cover.

    Result: 

    B 

    See step  19

    Result: 

    A 

    See step  6

  6. CHECK DC/DC CONVERTER ASSEMBLY 

    Pre-procedure1

    1. Disconnect the DC/DC converter cooling blower assembly connector.
      GTY1205212Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Procedure1

    2. Measure the voltage according to the value(s) in the table below.
      GTY1254131Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to DC/DC Converter Cooling Blower Assembly)

      Standard Voltage

      Tester Connection Condition Specified Condition
      H6-1 (FP) - Body ground Ignition switch ON 8 V or higher

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    3. Reconnect the DC/DC converter cooling blower assembly connector.

    Result: 

    NG 

    See step  16

    Result: 

    OK 

    See step  7

  7. CHECK DC/DC CONVERTER COOLING BLOWER ASSEMBLY 

    Pre-procedure1

    1. Disconnect the DC/DC converter cooling blower assembly connector.
      GTY1205212Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Procedure1

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      1 (FP) - 3 (PGND) Ignition switch off 100 Ω or higher
      GTY1227480Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (DC/DC Converter Cooling Blower Assembly)

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    3. Reconnect the DC/DC converter cooling blower assembly connector.

    Result: 

    NG 

    REPLACE DC/DC CONVERTER COOLING BLOWER ASSEMBLY. Refer to  REMOVAL [08/2023 - ] 

    Result: 

    OK 

    See step  8

  8. CHECK HARNESS AND CONNECTOR (DC/DC CONVERTER COOLING BLOWER ASSEMBLY VOLTAGE) 

    Pre-procedure1

    1. Disconnect the DC/DC converter cooling blower assembly connector.
      GTY1205212Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Procedure1

    2. Measure the voltage according to the value(s) in the table below.
      GTY1254130Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to DC/DC Converter Cooling Blower Assembly)

      Standard Voltage

      Tester Connection Condition Specified Condition
      H6-2 (IG) - Body ground Ignition switch ON 11 to 14 V

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    3. Reconnect the DC/DC converter cooling blower assembly connector.

    Result: 

    NG 

    See step  17

    Result: 

    OK 

    See step  9

  9. CHECK HARNESS AND CONNECTOR (DC/DC CONVERTER COOLING BLOWER ASSEMBLY - BODY GROUND) 

    Pre-procedure1

    1. Disconnect the DC/DC converter cooling blower assembly connector.
      GTY1205212Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Procedure1

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      H6-3 (PGND) - Body ground Ignition switch off Below 1 Ω
      H6-3 (PGND) - Body ground and other terminals Ignition switch off 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    3. Reconnect the DC/DC converter cooling blower assembly connector.

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  10

  10. CHECK DC/DC CONVERTER COOLING BLOWER ASSEMBLY 

    Pre-procedure1

    1. Disconnect the DC/DC converter assembly connector.
      GTY1203576Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Procedure1

    2. Measure the voltage according to the value(s) in the table below.
      GTY1254559Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to DC/DC Converter Assembly)

      Standard Voltage

      Tester Connection Condition Specified Condition
      H5-4 (SI) - Body ground Ignition switch ON 3 V or higher

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    3. Reconnect the DC/DC converter assembly connector.

    Result: 

    NG 

    See step  18

    Result: 

    OK 

    See step  11

  11. CHECK DC/DC CONVERTER ASSEMBLY 

    Pre-procedure1

    1. Disconnect the DC/DC converter assembly connector.
      GTY1203576Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Procedure1

    2. Measure the resistance according to the value(s) in the table below.
      GTY1106780Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (DC/DC Converter Assembly)

      Standard Resistance

      Tester Connection Condition Specified Condition
      4 (SI) - Body ground Ignition switch off Below 100 Ω

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    3. Reconnect the DC/DC converter assembly connector.

    Result: 

    NG 

    REPLACE DC/DC CONVERTER ASSEMBLY. Refer to  REMOVAL [08/2023 - ] 

    Result: 

    OK 

    See step  12

  12. CLEAR DTC 

    Refer to PROCEDURE - Step 3

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  13

  13. CHECK DTC OUTPUT (HYBRID CONTROL) 

    Pre-procedure1

    1. Turn the ignition switch off and wait for 2 minutes or more.
    2. With ignition switch to ON and wait for 5 seconds or more.
    3. With ignition switch to ON (READY) and wait for 5 seconds or more.
    4. Drive the vehicle for approximately 10 minutes.

      Procedure1

    5. Check for DTCs.

      Powertrain > Hybrid Control > Trouble Codes 

      Result

      Result  Proceed to
      DTC P1F32-00 is not output again. A
      DTC P1F32-00 is output again. B

      Post-procedure1

    6. Turn the ignition switch off.

    Result: 

    A 

    CHECK FOR INTERMITTENT PROBLEMS. Refer to  CHECK FOR INTERMITTENT PROBLEMS [08/2023 - ] 

    Result: 

    B 

    See step  14

  14. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR) 
    1. Check the connector connections and contact pressure of the relevant terminals for the hybrid vehicle control ECU connectors.
      GTY1130295Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [10/2022 - ]

      OK

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

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    CONNECT SECURELY 

    Result: 

    OK 

    See step  15

  15. CHECK HYBRID VEHICLE CONTROL ECU ASSEMBLY (CHECK WAVEFORM) 

    Pre-procedure1

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

      Procedure1

    2. Connect an oscilloscope between the hybrid vehicle control ECU terminals specified in the table below, and measure the waveform.
      GTY1204103Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Hybrid Vehicle Control ECU)      		 - -
      Item Content
      Terminal A21-14 (DFFS) - C59-1 (E1)
      Equipment Setting 5 V/DIV., 5 ms./DIV.
      Condition Ignition switch ON (READY)

      OK

      The duty ratio is between 55 to 75%.

      GTY1109001Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT: 

      • Perform this inspection with the hybrid vehicle control ECU connector connected.
      • The waveform (duty ratio) differs depending on the operation status of the DC/DC converter assembly and DC/DC converter cooling blower assembly.

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    3. Turn the ignition switch off.

    Result: 

    OK 

    REPLACE DC/DC CONVERTER COOLING BLOWER ASSEMBLY. Refer to  REMOVAL [08/2023 - ] 

    Result: 

    NG 

    REPLACE HYBRID VEHICLE CONTROL ECU. Refer to  REMOVAL [10/2022 - ] 

  16. CHECK HARNESS AND CONNECTOR (DC/DC CONVERTER ASSEMBLY - DC/DC CONVERTER COOLING BLOWER ASSEMBLY) 

    Pre-procedure1

    1. Disconnect the DC/DC converter cooling blower assembly connector.
      GTY1205212Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the DC/DC converter assembly connector.
      GTY1203576Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Procedure1

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      H6-1 (FP) - H5-8 (FP) Ignition switch off Below 1 Ω
      H6-1 (FP) or H5-8 (FP) - Body ground and other terminals Ignition switch off 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    4. Reconnect the DC/DC converter assembly connector.
    5. Reconnect the DC/DC converter cooling blower assembly connector.

    Result: 

    OK 

    REPLACE DC/DC CONVERTER ASSEMBLY. Refer to  REMOVAL [08/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  17. INSPECT FUSE (DC/DC FAN) 

    Pre-procedure1

    1. Remove the DC/DC FAN fuse from the No. 1 luggage room relay block and No. 1 junction block assembly.

      Procedure1

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      DC/DC FAN fuse Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    3. Install the DC/DC FAN fuse.

    Result: 

    OK 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    NG 

    REPLACE FUSE (DC/DC FAN) 

  18. CHECK HARNESS AND CONNECTOR (DC/DC CONVERTER ASSEMBLY - DC/DC CONVERTER COOLING BLOWER ASSEMBLY) 

    Pre-procedure1

    1. Disconnect the DC/DC converter cooling blower assembly connector.
      GTY1205212Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the DC/DC converter assembly connector.
      GTY1203576Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Procedure1

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      H6-4 (SI) - H5-4 (SI) Ignition switch off Below 1 Ω
      H6-4 (SI) or H5-4 (SI) - Body ground and other terminals Ignition switch off 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    4. Reconnect the DC/DC converter assembly connector.
    5. Reconnect the DC/DC converter cooling blower assembly connector.

    Result: 

    OK 

    REPLACE DC/DC CONVERTER COOLING BLOWER ASSEMBLY. Refer to  REMOVAL [08/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  19. CHECK HARNESS AND CONNECTOR (DC/DC CONVERTER COOLING BLOWER ASSEMBLY VOLTAGE) 

    Pre-procedure1

    1. Disconnect the DC/DC converter cooling blower assembly connector.
      GTY1205212Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Procedure1

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

      Standard Voltage

      Tester Connection Condition Specified Condition
      H6-2 (IG) - Body ground Ignition switch ON 11 to 14 V

      Result

      Proceed to
      OK
      NG
      GTY1254130Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to DC/DC Converter Cooling Blower Assembly)

      Post-procedure1

    3. Reconnect the DC/DC converter cooling blower assembly connector.

    Result: 

    NG 

    See step  29

    Result: 

    OK 

    See step  20

  20. CHECK HARNESS AND CONNECTOR (DC/DC CONVERTER COOLING BLOWER ASSEMBLY - BODY GROUND) 

    Pre-procedure1

    1. Disconnect the DC/DC converter cooling blower assembly connector.
      GTY1205212Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Procedure1

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      H6-3 (PGND) - Body ground Ignition switch off Below 1 Ω
      H6-3 (PGND) - Body ground and other terminals Ignition switch off 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    3. Reconnect the DC/DC converter cooling blower assembly connector.

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  21

  21. CHECK DC/DC CONVERTER COOLING BLOWER ASSEMBLY 

    Pre-procedure1

    1. Disconnect the DC/DC converter assembly connector.
      GTY1203576Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Procedure1

    2. Measure the voltage according to the value(s) in the table below.
      GTY1254558Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to DC/DC Converter Assembly)

      Standard Voltage

      Tester Connection Condition Specified Condition
      H5-4 (SI) - Body ground Ignition switch ON 3 V or higher

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    3. Reconnect the DC/DC converter assembly connector.

    Result: 

    NG 

    See step  30

    Result: 

    OK 

    See step  22

  22. CHECK DC/DC CONVERTER ASSEMBLY 

    Pre-procedure1

    1. Disconnect the DC/DC converter assembly connector.
      GTY1203576Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Procedure1

    2. Measure the resistance according to the value(s) in the table below.
      GTY1106780Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (DC/DC Converter Assembly)

      Standard Resistance

      Tester Connection Condition Specified Condition
      4 (SI) - Body ground Ignition switch off Below 100 Ω

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    3. Reconnect the DC/DC converter assembly connector.

    Result: 

    NG 

    REPLACE DC/DC CONVERTER ASSEMBLY. Refer to  REMOVAL [08/2023 - ] 

    Result: 

    OK 

    See step  23

  23. CHECK DC/DC CONVERTER ASSEMBLY 

    Pre-procedure1

    1. Disconnect the DC/DC converter cooling blower assembly connector.
      GTY1205212Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Procedure1

    2. Measure the voltage according to the value(s) in the table below.
      GTY1254132Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to DC/DC Converter Cooling Blower Assembly)

      Standard Voltage

      Tester Connection Condition Specified Condition
      H6-1 (FP) - Body ground Ignition switch ON 8 V or higher

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    3. Reconnect the DC/DC converter cooling blower assembly connector.

    Result: 

    NG 

    See step  31

    Result: 

    OK 

    See step  24

  24. CHECK DC/DC CONVERTER COOLING BLOWER ASSEMBLY 

    Pre-procedure1

    1. Disconnect the DC/DC converter cooling blower assembly connector.
      GTY1205212Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Procedure1

    2. Measure the resistance according to the value(s) in the table below.
      GTY1227480Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (DC/DC Converter Cooling Blower Assembly)

      Standard Resistance

      Tester Connection Condition Specified Condition
      1 (FP) - 3 (PGND) Ignition switch off 100 Ω or higher

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    3. Reconnect the DC/DC converter cooling blower assembly connector.

    Result: 

    NG 

    REPLACE DC/DC CONVERTER COOLING BLOWER ASSEMBLY. Refer to  REMOVAL [08/2023 - ] 

    Result: 

    OK 

    See step  25

  25. CLEAR DTC 

    Refer to PROCEDURE - Step 3

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  26

  26. CHECK DTC OUTPUT (HYBRID CONTROL) 

    Pre-procedure1

    1. Turn the ignition switch off and wait for 2 minutes or more.
    2. With ignition switch to ON and wait for 5 seconds or more.
    3. With ignition switch to ON (READY) and wait for 5 seconds or more.
    4. Drive the vehicle for approximately 10 minutes.

      Procedure1

    5. Check for DTCs.

      Powertrain > Hybrid Control > Trouble Codes 

      Result

      Result  Proceed to
      DTC P1F32-00 is not output again. A
      DTC P1F32-00 is output again. B

      Post-procedure1

    6. Turn the ignition switch off.

    Result: 

    A 

    REPLACE DC/DC CONVERTER COOLING BLOWER ASSEMBLY. Refer to  REMOVAL [08/2023 - ] 

    Result: 

    B 

    See step  27

  27. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR) 
    1. Check the connector connections and contact pressure of the relevant terminals for the hybrid vehicle control ECU connectors.

      Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [10/2022 - ]

      OK

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

      GTY1130295Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    CONNECT SECURELY 

    Result: 

    OK 

    See step  28

  28. CHECK HYBRID VEHICLE CONTROL ECU ASSEMBLY (CHECK WAVEFORM) 

    Pre-procedure1

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

      Procedure1

    2. Connect an oscilloscope between the hybrid vehicle control ECU terminals specified in the table below, and measure the waveform.
      GTY1204103Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Hybrid Vehicle Control ECU)      		 - -
      Item Content
      Terminal A21-14 (DFFS) - C59-1 (E1)
      Equipment Setting 5 V/DIV., 5 ms./DIV.
      Condition Ignition switch ON (READY)

      OK

      The duty ratio is between 55 to 75%.

      GTY1109001Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT: 

      • Perform this inspection with the hybrid vehicle control ECU connector connected.
      • The waveform (duty ratio) differs depending on the operation status of the DC/DC converter assembly and DC/DC converter cooling blower assembly.

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    3. Turn the ignition switch off.

    Result: 

    OK 

    REPLACE DC/DC CONVERTER ASSEMBLY AND DC/DC CONVERTER COOLING BLOWER ASSEMBLY 

    Result: 

    NG 

    REPLACE HYBRID VEHICLE CONTROL ECU. Refer to  REMOVAL [10/2022 - ] 

  29. INSPECT FUSE (DC/DC FAN) 

    Pre-procedure1

    1. Remove the DC/DC FAN fuse from the No. 1 luggage room relay block and No. 1 junction block assembly.

      Procedure1

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      DC/DC FAN fuse Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    3. Install the DC/DC FAN fuse.

    Result: 

    OK 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    NG 

    REPLACE FUSE (DC/DC FAN) 

  30. CHECK HARNESS AND CONNECTOR (DC/DC CONVERTER ASSEMBLY - DC/DC CONVERTER COOLING BLOWER ASSEMBLY) 

    Pre-procedure1

    1. Disconnect the DC/DC converter cooling blower assembly connector.
      GTY1205212Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the DC/DC converter assembly connector.
      GTY1203576Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Procedure1

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      H6-4 (SI) - H5-4 (SI) Ignition switch off Below 1 Ω
      H6-4 (SI) or H5-4 (SI) - Body ground and other terminals Ignition switch off 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    4. Reconnect the DC/DC converter assembly connector.
    5. Reconnect the DC/DC converter cooling blower assembly connector.

    Result: 

    OK 

    REPLACE DC/DC CONVERTER COOLING BLOWER ASSEMBLY. Refer to  REMOVAL [08/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  31. CHECK HARNESS AND CONNECTOR (DC/DC CONVERTER ASSEMBLY - DC/DC CONVERTER COOLING BLOWER ASSEMBLY) 

    Pre-procedure1

    1. Disconnect the DC/DC converter cooling blower assembly connector.
      GTY1205212Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the DC/DC converter assembly connector.
      GTY1203576Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Procedure1

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      H6-1 (FP) - H5-8 (FP) Ignition switch off Below 1 Ω
      H6-1 (FP) or H5-8 (FP) - Body ground and other terminals Ignition switch off 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    4. Reconnect the DC/DC converter assembly connector.
    5. Reconnect the DC/DC converter cooling blower assembly connector.

    Result: 

    OK 

    REPLACE DC/DC CONVERTER ASSEMBLY. Refer to  REMOVAL [08/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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