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DTC P1F32-00: DC/DC Converter Cooling System Performance [12/2023 - ]: Procedure

WARNING: This page is about a different car, the 2024 Lexus TX 550h+. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK DTC OUTPUT (HYBRID CONTROL) 

    Pre-procedure1

    • None.
    • 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

    Post-procedure1

    • Turn the ignition switch off.

    Result: 

    B 

    GO TO DTC CHART (HYBRID CONTROL SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2023 - ] 

    Result: 

    A 

    See step  2

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

    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.

      HINT: 

      Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [09/2023 - ]

      OK

      The terminals are not deformed and are connected securely.

      GTY1231537Courtesy 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.

      HINT: 

      Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [09/2023 - ]

      OK

      The terminals are not deformed and are connected securely.

      GTY1231584Courtesy 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

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

    • None.

    Result: 

    B 

    See step  19

    Result: 

    A 

    See step  6

  6. CHECK DC/DC CONVERTER ASSEMBLY 

    Pre-procedure1

    • Disconnect the DC/DC converter cooling blower assembly connector.
      GTY1235302Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition Result
      J83-1 (FP) - Body ground Ignition switch ON 8 V or higher V
      GTY1238926Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to DC/DC Converter Cooling Blower Assembly)

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • 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

    • Disconnect the DC/DC converter cooling blower assembly connector.
      GTY1235302Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • Measure the resistance according to the value(s) in the table below.

      Standard Resistance

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

      Result

      Proceed to
      OK
      NG

    Post-procedure1

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

    Result: 

    NG 

    REPLACE DC/DC CONVERTER COOLING BLOWER ASSEMBLY. Refer to  REMOVAL [12/2023 - ] 

    Result: 

    OK 

    See step  8

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

    Pre-procedure1

    • Disconnect the DC/DC converter cooling blower assembly connector.
      GTY1235302Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition Result
      J83-2 (IG) - Body ground Ignition switch ON 11 to 14 V V
      GTY1238925Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to DC/DC Converter Cooling Blower Assembly)

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • 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

    • Disconnect the DC/DC converter cooling blower assembly connector.
      GTY1235302Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      J83-3 (PGND) - Body ground Ignition switch off Below 1 Ω Ω
      J83-3 (PGND) - Body ground and other terminals Ignition switch off 10 kΩ or higher kΩ
      GTY1238924Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to DC/DC Converter Cooling Blower Assembly)

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • 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

    • Disconnect the DC/DC converter assembly connector.
      GTY1238643Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition Result
      I49-4 (SI) - Body ground Ignition switch ON 3 V or higher V
      GTY1230380Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to DC/DC Converter Assembly)

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • 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

    • Disconnect the DC/DC converter assembly connector.
      GTY1238643Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      4 (SI) - Body ground Ignition switch off Below 100 Ω Ω
      GTY1106780Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (DC/DC Converter Assembly)

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • Reconnect the DC/DC converter assembly connector.

    Result: 

    NG 

    REPLACE DC/DC CONVERTER ASSEMBLY. Refer to  REMOVAL [12/2023 - ] 

    Result: 

    OK 

    See step  12

  12. CLEAR DTC 

    HINT: 

    Refer to PROCEDURE - Step 3

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  13

  13. CHECK DTC OUTPUT (HYBRID CONTROL) 

    Pre-procedure1

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

      Powertrain > Hybrid Control > Trouble Codes 

      Result

      Result  Proceed to
      P1F32-00 is not output A
      P1F32-00 is output B

    Post-procedure1

    • Turn the ignition switch off.

    Result: 

    A 

    CHECK FOR INTERMITTENT PROBLEMS. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2023 - ] 

    Result: 

    B 

    See step  14

  14. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU ASSEMBLY CONNECTOR) 
    1. Check the connector connections and contact pressure of the relevant terminals for the hybrid vehicle control ECU assembly connectors.
      GTY1231586Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT: 

      Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [09/2023 - ]

      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

    • Turn the ignition switch to ON (READY).
    • Connect an oscilloscope between the hybrid vehicle control ECU assembly terminals specified in the table below, and measure the waveform.
      GTY1236505Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Hybrid Vehicle Control ECU Assemblly)      		 - -
      Item Content
      Terminal B88-14 (DFFS) - D117-15 (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 assembly 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

    • Turn the ignition switch off.

    Result: 

    OK 

    REPLACE DC/DC CONVERTER COOLING BLOWER ASSEMBLY. Refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY. Refer to  REMOVAL [12/2023 - ] 

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

    Pre-procedure1

    • Disconnect the DC/DC converter cooling blower assembly connector.
      GTY1235302Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • Disconnect the DC/DC converter assembly connector.
      GTY1238643Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • Measure the resistance according to the value(s) in the table below.
      GTY1229431Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to DC/DC Converter Cooling Blower Assembly)      		 *b Front view of wire harness connector
      (to DC/DC Converter Assembly)

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      J83-1 (FP) - I49-8 (FP) Ignition switch off Below 1 Ω Ω
      J83-1 (FP) or I49-8 (FP) - Body ground and other terminals Ignition switch off 10 kΩ or higher kΩ

      Result

      Proceed to
      OK
      NG

    Post-procedure1

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

    Result: 

    OK 

    REPLACE DC/DC CONVERTER ASSEMBLY. Refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  17. INSPECT FUSE (DC/DC FAN) 

    Pre-procedure1

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

    • 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

    • Disconnect the DC/DC converter cooling blower assembly connector.
      GTY1235302Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • Disconnect the DC/DC converter assembly connector.
      GTY1238643Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • Measure the resistance according to the value(s) in the table below.
      GTY1239421Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to DC/DC Converter Cooling Blower Assembly)      		 *b Front view of wire harness connector
      (to DC/DC Converter Assembly)

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      J83-4 (SI) - I49-4 (SI) Ignition switch off Below 1 Ω Ω
      J83-4 (SI) or I49-4 (SI) - Body ground and other terminals Ignition switch off 10 kΩ or higher kΩ

      Result

      Proceed to
      OK
      NG

    Post-procedure1

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

    Result: 

    OK 

    REPLACE DC/DC CONVERTER COOLING BLOWER ASSEMBLY. Refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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

    Pre-procedure1

    • Disconnect the DC/DC converter cooling blower assembly connector.
      GTY1235302Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition Result
      J83-2 (IG) - Body ground Ignition switch ON 11 to 14 V V
      GTY1241407Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to DC/DC Converter Cooling Blower Assembly)

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • 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

    • Disconnect the DC/DC converter cooling blower assembly connector.
      GTY1235302Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • Measure the resistance according to the value(s) in the table below.
      GTY1238923Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to DC/DC Converter Cooling Blower Assembly)

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      J83-3 (PGND) - Body ground Ignition switch off Below 1 Ω Ω
      J83-3 (PGND) - Body ground and other terminals Ignition switch off 10 kΩ or higher kΩ

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • 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

    • Disconnect the DC/DC converter assembly connector.
      GTY1238643Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition Result
      I49-4 (SI) - Body ground Ignition switch ON 3 V or higher V
      GTY1239613Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to DC/DC Converter Assembly)

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • 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

    • Disconnect the DC/DC converter assembly connector.
      GTY1238643Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      4 (SI) - Body ground Ignition switch off Below 100 Ω Ω
      GTY1106780Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (DC/DC Converter Assembly)

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • Reconnect the DC/DC converter assembly connector.

    Result: 

    NG 

    REPLACE DC/DC CONVERTER ASSEMBLY. Refer to  REMOVAL [12/2023 - ] 

    Result: 

    OK 

    See step  23

  23. CHECK DC/DC CONVERTER ASSEMBLY 

    Pre-procedure1

    • Disconnect the DC/DC converter cooling blower assembly connector.
      GTY1235302Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition Result
      J83-1 (FP) - Body ground Ignition switch ON 8 V or higher V
      GTY1238922Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to DC/DC Converter Cooling Blower Assembly)

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • 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

    • Disconnect the DC/DC converter cooling blower assembly connector.
      GTY1235302Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • Measure the resistance according to the value(s) in the table below.

      Standard Resistance

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

      Result

      Proceed to
      OK
      NG

    Post-procedure1

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

    Result: 

    NG 

    REPLACE DC/DC CONVERTER COOLING BLOWER ASSEMBLY. Refer to  REMOVAL [12/2023 - ] 

    Result: 

    OK 

    See step  25

  25. CLEAR DTC 

    HINT: 

    Refer to PROCEDURE - Step 3

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  26

  26. CHECK DTC OUTPUT (HYBRID CONTROL) 

    Pre-procedure1

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

      Powertrain > Hybrid Control > Trouble Codes 

      Result

      Result  Proceed to
      P1F32-00 is not output A
      P1F32-00 is output B

    Post-procedure1

    • Turn the ignition switch off.

    Result: 

    A 

    REPLACE DC/DC CONVERTER COOLING BLOWER ASSEMBLY. Refer to  REMOVAL [12/2023 - ] 

    Result: 

    B 

    See step  27

  27. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU ASSEMBLY CONNECTOR) 
    1. Check the connector connections and contact pressure of the relevant terminals for the hybrid vehicle control ECU assembly connectors.
      GTY1231586Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT: 

      Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [09/2023 - ]

      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  28

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

    Pre-procedure1

    • Turn the ignition switch to ON (READY).
    • Connect an oscilloscope between the hybrid vehicle control ECU assembly terminals specified in the table below, and measure the waveform.
      GTY1236505Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Hybrid Vehicle Control ECU Assemblly)      		 - -
      Item Content
      Terminal B88-14 (DFFS) - D117-15 (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 assembly 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

    • 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 ASSEMBLY. Refer to  REMOVAL [12/2023 - ] 

  29. INSPECT FUSE (DC/DC FAN) 

    Pre-procedure1

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

    • 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

    • Disconnect the DC/DC converter cooling blower assembly connector.
      GTY1235302Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • Disconnect the DC/DC converter assembly connector.
      GTY1238643Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • Measure the resistance according to the value(s) in the table below.
      GTY1229433Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to DC/DC Converter Cooling Blower Assembly)      		 *b Front view of wire harness connector
      (to DC/DC Converter Assembly)

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      J83-4 (SI) - I49-4 (SI) Ignition switch off Below 1 Ω Ω
      J83-4 (SI) or I49-4 (SI) - Body ground and other terminals Ignition switch off 10 kΩ or higher kΩ

      Result

      Proceed to
      OK
      NG

    Post-procedure1

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

    Result: 

    OK 

    REPLACE DC/DC CONVERTER COOLING BLOWER ASSEMBLY. Refer to  REMOVAL [12/2023 - ] 

    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

    • Disconnect the DC/DC converter cooling blower assembly connector.
      GTY1235302Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • Disconnect the DC/DC converter assembly connector.
      GTY1238643Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • Measure the resistance according to the value(s) in the table below.
      GTY1229432Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to DC/DC Converter Cooling Blower Assembly)      		 *b Front view of wire harness connector
      (to DC/DC Converter Assembly)

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      J83-1 (FP) - I49-8 (FP) Ignition switch off Below 1 Ω Ω
      J83-1 (FP) or I49-8 (FP) - Body ground and other terminals Ignition switch off 10 kΩ or higher kΩ

      Result

      Proceed to
      OK
      NG

    Post-procedure1

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

    Result: 

    OK 

    REPLACE DC/DC CONVERTER ASSEMBLY. Refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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