The following may indicate that your vehicle is overheating.
Correction procedures
If you do not see steam: carefully lift the hood.

If a large amount of coolant leaks, immediately contact your toyota dealer.

Water can be used in an emergency if coolant is unavailable.

The fans operate when the air conditioning system is turned on immediately after a cold start. Confirm that the fans are operating by checking the fan sound and air flow. If it is difficult to check these, turn the air conditioning system on and off repeatedly. (The fans may not operate in freezing temperatures.)
If the fans are operating: have the vehicle inspected at the nearest toyota dealer.
Caution
When inspecting under the hood of your vehicle
Observe the following precautions.
Failure to do so may result in serious injury such as burns.
Notice
When adding engine coolant
Add coolant slowly after the engine has cooled down sufficiently. Adding cool coolant to a hot engine too quickly can cause damage to the engine.
To prevent damage to the cooling system
Observe the following precautions:
If the vehicle battery
is discharged
If the vehicle becomes
stuckRemoval
Disconnect cable from negative battery
terminal
Caution:
Wait at least 90 seconds after disconnecting the
cable from the negative (-) battery terminal to
prevent airbag and seat belt pretensioner activation.
Remove fan and generator v belt
Remove the belt (see page em-6).
...
Disassembly
Remove sliding roof drive gear subassembly
Remove the claw and room light bracket.
Remove the 2 bolts and drive gear.
Remove sliding roof drain hose joint lh
Remove the screw and joint.
Remove sliding roof drain hose joint rh
Hint:
Use the same proced ...
Operation check
Illuminated entry system operation check
The illuminated entry system controls the following
lights:
Ignition key cylinder light*1 or transponder key
amplifier*2
Foot light
Map light and room light
Hint:
*1: W/o engine immobiliser system
*2: W/ engine immobiliser ...