2010 Lexus HS250h coolant level

5
When trouble arises
543
5-2. Steps to take in an emergency
After the hybrid system has cooled
down, check the power control
unit coolant level and inspect the
cooling system for leaks.
Add power control unit coolant if
nec
essary.
Water can be used in an emer -
gency if power control unit coolant
is una
vailable. ( P. 5 5 2 )
Have the vehicle inspected at the ne arest Lexus dealer as soon as possi-
ble.
■Overheating
The following symptoms may occur wh en
your vehicle is overheating:
●The high engine coolant temperature warn ing light comes on or flashes, or the
hybrid system output decreases.
●Steam comes out from the engine area.
●“HYBRID SYSTEM OVERHEAT” is displayed on the multi-information display.

602
Alphabetical index
TowingDinghy towing ..................................... 248
Emergency towing ...........................483
Trailer towing........................................247
TRAC......................................................... 225
Traction control ..................................... 225
Trailer towing.......................................... 247
Trip meter ................................................. 162
Trunk Opener ...................................................... 60
Turn signal lights Replacing light bulbs........................ 469
Switch ........................................................ 162
Wattage..................................................556
Vanity lights Vanity lights .......................................... 372
Wattage..................................................556
Vanity mirrors ........................................ 372
Vehicle identification number ........ 548
Vehicle stability control...................... 225
Ventilators ............................................... 375
VSC ............................................................ 225
Warning buzzers Brake system ....................................... 492
Open door ..........................................495
Seat belt reminder.............................495 Warning lights
AFS OFF ............................................... 493
Anti-lock brake system .................. 493
Brake assist system .......................... 493
Brake system ........................................492
Charging system ................................492
Cruise control ..................................... 493
Electric power steering warning light..................................... 493
Electronic engine control 
system.................................................. 493
High coolant temperature .............492
Hybrid battery system .................... 493
LKA .......................................................... 493
Low fuel level....................................... 495
Low tire pressure .............................. 495
Malfunction indicator lamp .......... 493
Master warning light........................ 495
Open door ........................................... 495
Pre-collision system......................... 493
Pretensioner ........................................ 493
Radar cruise control ........................ 493
Seat belt reminder light .................. 495
Slip indicator ........................................ 493
SRS airbags .......................................... 493
Tire pressure warning light .......... 495
V
W

606
What to do if...
■Warning lights
P. 4 9 4
or
P. 4 9 2P. 4 9 4
P. 4 9 2P. 4 9 4
P. 4 9 3P. 4 9 4
P. 4 9 3P. 4 9 4
P. 4 9 5
or
P. 4 9 3P. 4 9 5
P. 4 9 3P. 4 9 5
P. 4 9 5
or
P. 4 9 3P. 4 9 5
P. 4 9 4P. 4 9 6
P. 4 9 4
Brake system warning light
(red indicator)“AFS OFF” indicator light
Slip indicator light
Charging system warning
light“LKA” indicator light
High engine coolant temperature
warning lightCruise control indicator light
Brake system warning light(yellow indicator)Radar cruise control 
indicator light
Malfunction indicator lampOpen door warning light
Low fuel level warning light
SRS warning lightDriver’s seat belt reminder
light
“ABS” warning lightFront passenger’s seat belt
reminder light
Master warning light
Electric power steering system
warning lightTire pressure warning light
Pre-collision system warning
light