WATER PUMP REMOVAL

PROCEDURE


  1. PRECAUTION

    Note


    • The coolant (Toyota genuine FC stack coolant) is an exclusive coolant.

    • The coolant (Toyota genuine FC stack coolant) cannot be reused, so when filling, be sure to fill with new coolant (Toyota genuine FC stack coolant).

    • To prevent degradation of coolant (Toyota genuine FC stack coolant) performance, do not add or fill any other substances such as tap water or battery electrolyte refill liquid.

    • Do not use cotton work gloves or other gloves that could shed fibers.

    • DO NOT use any container that has previously been used to fill substances such as oil.

    • To prevent foreign matter from contaminating the coolant (Toyota genuine FC stack coolant) passages, wash out the prepared container with tap water, then wipe away any water remaining inside the container before using it.

    • If the coolant (Toyota genuine FC stack coolant) passages are filled incorrectly, follow the countermeasures according to "Countermeasures when coolant (Toyota genuine FC stack coolant) passages are filled incorrectly".

      Click here

    • When the vehicle is parked with the power switch off, if the FC control ECU judges that the FC stack temperature will go below 0°C (32°F), it activates the FC air compressor, hydrogen pump and FC cooling water pump for a maximum of 180 seconds and drains water from the FC stack assembly. When performing inspection or repairs with the power switch off (not on (IG) or on (READY)), disconnect the cable from the negative (-) auxiliary battery terminal before performing work.

  2. REMOVE FRONT BUMPER LOWER ABSORBER

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  3. REMOVE NO. 2 MOTOR UNDER COVER

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  4. REMOVE FRONT FLOOR COVER LH

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  5. REMOVE FRONT FLOOR COVER RH

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  6. REMOVE SUSPENSION MEMBER TO FRONT CROSSMEMBER BRACE SUB-ASSEMBLY

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  7. DRAIN COOLANT (FC STACK COOLANT)

    Click here

  8. REMOVE FC AIR COMPRESSOR WITH MOTOR ASSEMBLY

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  9. REMOVE FC WATER PUMP DRAIN HOSE ASSEMBLY


    1. A01MIK4

      Slide the hose clip and remove the FC water pump drain hose assembly from the FC cooling water pump assembly.

      Note


      • When removing, be careful not to damage the hose interior surface or port of FC cooling water pump assembly portion.

      • Perform the work by hand. Do not use tools.

    2. A01MGYDC03
      *a Plastic Bag

      To prevent contamination by foreign matter, cover the connecting portions of the FC water pump drain hose assembly and FC cooling water pump assembly with plastic bags.

  10. DISCONNECT INTERCOOLER COOLING WATER OUTLET HOSE


    1. A01MHQ3

      Disengage the 2 clamps to disconnect the intercooler cooling water outlet hose from the No. 3 FC air compressor outlet pipe bracket and FC cooling water pump inlet pipe.

  11. DISCONNECT FC CONVERTER COOLING WATER OUTLET HOSE


    1. A01MG4A

      Disengage the clamp to disconnect the FC converter cooling water outlet hose from the No. 3 FC air compressor outlet pipe bracket.

  12. DISCONNECT INTERCOOLER COOLING WATER INLET HOSE


    1. A01MHRC

      Slide the hose clip and disconnect the intercooler cooling water inlet hose from the FC cooling water pump outlet pipe.

      Note


      • When disconnecting, be careful not to damage the hose interior surface or port of FC cooling water pump outlet pipe portion.

      • Perform the work by hand. Do not use tools.

    2. A01MJOO

      Disengage the 2 clamps to disconnect the intercooler cooling water inlet hose from the No. 3 FC air compressor outlet pipe bracket and FC cooling water pump inlet pipe.

    3. A01MGVEC03
      *a Plastic Bag

      To prevent contamination by foreign matter, cover the connecting portions of the intercooler cooling water inlet hose and FC cooling water outlet pipe with plastic bags.

  13. REMOVE NO. 1 FC COOLING WATER PUMP OUTLET HOSE


    1. A01MHKI

      Disengage the clamp to disconnect the No. 2 FC cooling water pump outlet hose.

    2. Slide the hose clip and disconnect the No. 1 FC cooling water pump outlet hose from the FC cooling water pump assembly.

      Note


      • When removing, be careful not to damage the hose interior surface or port of FC cooling water pump assembly portion.

      • Perform the work by hand. Do not use tools.

    3. A01MFL4C03
      *a Plastic Bag

      To prevent contamination by foreign matter, cover the connecting portions of the No. 1 FC cooling water pump outlet hose and FC cooling water pump assembly with plastic bags.

  14. REMOVE FC COOLING WATER PUMP INLET HOSE


    1. A01MITX

      Disconnect the water temperature sensor connector.

    2. A01MG1V

      Remove the 2 bolts to separate the FC cooling water pump inlet pipe.

    3. A01MFN3

      Slide the hose clip and remove the FC cooling water pump inlet hose from the FC cooling water pump assembly.

      Note


      • When removing, be careful not to damage the hose interior surface or port of FC cooling water pump assembly portion.

      • Perform the work by hand. Do not use tools.

    4. A01MJMJC03
      *a Plastic Bag

      To prevent contamination by foreign matter, cover the connecting portions of the FC cooling water pump inlet hose and FC cooling water pump assembly with plastic bags.

  15. REMOVE NO. 3 FC AIR COMPRESSOR OUTLET PIPE BRACKET


    1. A01MJLY

      Remove the 2 bolts.

    2. A01MG56

      Remove the 2 bolts and No. 3 FC air compressor outlet pipe bracket from the FC air compressor with motor assembly.

  16. REMOVE FC COOLING WATER PUMP ASSEMBLY


    1. A01MGFT

      Disengage the clamp to disconnect the wire harness from the No. 1 FC air compressor outlet pipe.

    2. A01MG0D

      Remove the bolt, 2 nuts and FC cooling water pump assembly from the FC air compressor with motor assembly.

      Note


      • When removing, do not hold the FC cooling water pump assembly by its port portion and wire harness.

      • If the FC cooling water pump assembly has been struck or dropped, replace it.

  17. REMOVE STUD BOLT

    Tech Tips

    Only perform this procedure when replacement of the stud bolt is necessary.


    1. A01MHC6

      Using "TORX" socket wrench E8, remove the 2 stud bolts.