LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2019 >> Mirai >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Engine Cooling System - Service Information >> Water Pump >> Removal [06/2015 - ] >> Procedure

Removal [06/2015 - ]: Procedure

  1. PRECAUTION 
    NOTE:
    • The coolant (Toyota genuine FC stack coolant (Pre-mixed)) is an exclusive coolant.
    • The coolant (Toyota genuine FC stack coolant (Pre-mixed)) cannot be reused, so when filling, be sure to fill with new coolant (Toyota genuine FC stack coolant (Pre-mixed)).
    • To prevent degradation of coolant (Toyota genuine FC stack coolant (Pre-mixed)) 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 (Pre-mixed)) 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 (Pre-mixed)) passages are filled incorrectly, follow the countermeasures according to "Countermeasures when coolant (Toyota genuine FC stack coolant (Pre-mixed)) passages are filled incorrectly".

      Refer to PRECAUTION [06/2015 - ] 

    • 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 

    Refer to PROCEDURE - Step 7 [06/2015 - 11/2018] , or refer to PROCEDURE - Step 7 [11/2018 - ]

  3. REMOVE NO. 2 MOTOR UNDER COVER 

    Refer to PROCEDURE - Step 1 [06/2015 - 11/2018] , or refer to PROCEDURE - Step 1 [11/2018 - ]

  4. REMOVE FRONT FLOOR COVER LH 

    Refer to PROCEDURE - Step 2 [06/2015 - 11/2018] , or refer to PROCEDURE - Step 2 [11/2018 - ]

  5. REMOVE FRONT FLOOR COVER RH 

    Refer to PROCEDURE - Step 3 [06/2015 - 11/2018] , or refer to PROCEDURE - Step 3 [11/2018 - ]

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

    Refer to PROCEDURE - Step 17 [06/2015 - 11/2018] , or refer to PROCEDURE - Step 17 [11/2018 - ]

  7. DRAIN COOLANT (TOYOTA GENUINE FC STACK COOLANT (Pre-mixed)) 

    See step  7

  8. REMOVE FC AIR COMPRESSOR WITH MOTOR ASSEMBLY 

    Refer to REMOVAL [06/2015 - 11/2018] , or refer to REMOVAL [11/2018 - ]

  9. REMOVE FC WATER PUMP DRAIN HOSE ASSEMBLY 
    1. Slide the hose clip and remove the FC water pump drain hose assembly from the FC cooling water pump assembly.
      GTY600420Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      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. 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.
      GTY594699Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Plastic Bag
  10. DISCONNECT INTERCOOLER COOLING WATER OUTLET HOSE 
    1. 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.
      GTY551666Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  11. DISCONNECT FC CONVERTER COOLING WATER OUTLET HOSE 
    1. Disengage the clamp to disconnect the FC converter cooling water outlet hose from the No. 3 FC air compressor outlet pipe bracket.
      GTY565065Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  12. DISCONNECT INTERCOOLER COOLING WATER INLET HOSE 
    1. Slide the hose clip and disconnect the intercooler cooling water inlet hose from the FC cooling water pump outlet pipe.
      GTY551667Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      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. 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.
      GTY565082Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. 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.
      GTY546806Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Plastic Bag
  13. REMOVE NO. 1 FC COOLING WATER PUMP OUTLET HOSE 
    1. Disengage the clamp to disconnect the No. 2 FC cooling water pump outlet hose.
      GTY551672Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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. 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.
      GTY560481Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Plastic Bag
  14. REMOVE FC COOLING WATER PUMP INLET HOSE 
    1. Disconnect the water temperature sensor connector.
      GTY551649Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the 2 bolts to separate the FC cooling water pump inlet pipe.
      GTY600417Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Slide the hose clip and remove the FC cooling water pump inlet hose from the FC cooling water pump assembly.
      GTY551651Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      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. 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.
      GTY544094Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Plastic Bag
  15. REMOVE NO. 3 FC AIR COMPRESSOR OUTLET PIPE BRACKET 
    1. Remove the 2 bolts.
      GTY551644Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the 2 bolts and No. 3 FC air compressor outlet pipe bracket from the FC air compressor with motor assembly.
      GTY551646Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  16. REMOVE FC COOLING WATER PUMP ASSEMBLY 
    1. Disengage the clamp to disconnect the wire harness from the No. 1 FC air compressor outlet pipe.
      GTY600416Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the bolt, 2 nuts and FC cooling water pump assembly from the FC air compressor with motor assembly.
      GTY551647Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      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 FC COOLING WATER PUMP STUD BOLT 

    HINT: 

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

    1. Using "TORX" socket wrench E8, remove the 2 stud bolts.
      GTY551656Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
scientia non olet · About LEMON Manuals