Toyota TUNDRA Manual page 586

586
8-2. Steps to take in an emergency
4
The coolant level is satisfactory
if it is between the "FULL" and
"LOW" lines on the reservoir.
1
Reservoir
2
"FULL"
3
"LOW"
4
Radiator cap
5
Add coolant if necessary.
Water can be used in an emer-
gency if coolant is unavailable.
6
Start the engine to check that the radiator cooling fan operates and
to check for coolant leaks from the radiator or hoses.
7
If the fan is not operating:
Stop the engine immediately and contact your Toyota dealer.
If the fan is operating:
Have the vehicle inspected at the nearest Toyota dealer.