On-Vehicle Inspection [11/2020 - ]: Procedure

HINT: 

Refer to PRECAUTION [11/2020 - ]

WARNING:

• When coolant (Toyota genuine FC stack coolant (Pre-mixed)) is hot, do not remove the radiator cap sub-assembly.
• Fluid and steam may spray out due to high pressure, possibly resulting in burns.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the reserve tank cap.
2. Fill the FC radiator reserve tank assembly with new coolant (Toyota genuine FC stack coolant (Pre-mixed)), and then install a radiator cap tester.

3. Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Pump the radiator cap tester to 108 kPa (1.1 kgf/cm² , 16 psi), and then check that the pressure does not drop and there are no leaks from the following locations.

   • Each hose
   • FC radiator reserve tank assembly
   • FC radiator assembly
   • FC cooling water temperature control valve
   • FC cooling water pump assembly
   • FC cooling water ion exchanger assembly
   • FC stack assembly
   • Heater water with motor pump assembly
   • Heater accessory assembly
   • Electric heater sub-assembly
   • Heater radiator unit sub-assembly
   • Intercooler with sensor assembly
   • Hydrogen recirculation pump assembly
   • Hydrogen recirculation separator assembly
4. Remove the radiator cap tester.
5. Install the reserve tank cap.
6. Drive the vehicle for approximately 15 minutes.
7. After driving the vehicle, re-check to make sure that no coolant (Toyota genuine FC stack coolant (Pre-mixed)) is leaking from the coolant passages.

1. Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   When the FC system is cold, check that the fluid level in the reserve tank is between the MAX and MIN lines.

   NOTE:

   Do not fill any coolant other than the specified coolant (Toyota genuine FC stack coolant (Pre-mixed)).

2. If the coolant (Toyota genuine FC stack coolant (Pre-mixed)) level is low, perform coolant leak inspection, and fill new coolant (Toyota genuine FC stack coolant (Pre-mixed)).

WARNING:

• When coolant (Toyota genuine FC stack coolant (Pre-mixed)) is hot, do not remove the reserve tank cap.
• Fluid and steam may spray out due to high pressure, possibly resulting in burns.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the reserve tank cap.
2. Check that there are no excessive deposits of rust or scale around the radiator cap sub-assembly and coolant (Toyota genuine FC stack coolant (Pre-mixed)) hole. Also, the coolant (Toyota genuine FC stack coolant (Pre-mixed)) should be free of oil.
3. If excessively dirty, replace the coolant (Toyota genuine FC stack coolant (Pre-mixed)).
4. Remove the radiator cap tester.