AWD/IS350/IS300 AWD)- Page 359

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7-2. Steps to take in an emergency

7

When trouble

 ari

ses



Intercooler (IS300)

Reservoir cap
“F” line
“L” line

5

Add coolant if necessary.

Water can be used in an emergency if 

coolant is unavailable.



Engine (IS350 
AWD/IS350/IS300 AWD)



Engine (IS300)



Engine (IS500)



Intercooler (IS300)

6

Start the engine and turn the air 
conditioning system on to check 
that the radiator cooling fans oper-
ate and to check for coolant leaks 
from the radiator or hoses.

The fans operate when the air conditioning 

system is turned on immediately after a 

cold start. Confirm that the fans are oper-

ating by checking the fan sound and air 

flow. If it is difficult to check these, turn the 

air conditioning system on and off repeat-

edly. (The fans may not operate in freezing 

temperatures.)

7

If the fans are not operating:
Stop the engine immediately and 
contact your Lexus dealer.
If the fans are operating:
Have the vehicle inspected at the 
nearest Lexus dealer.

8

Check if “Engine Coolant Temp 
High Stop in a Safe Place See 
Owner’s Manual” is shown on the 

A
B
C