2011 Lexus CT200h check engine

494
4-3. Do-it-yourself maintenance
CT200h_EE (OM76041E)
Radiator and condenser
Check the radiator and condenser and clear away any foreign
objects.
If either of the above parts is extremely dirty or you are not sure of
their condition, have your vehicle inspected by any authorized
Lexus dealer or repairer, or another duly qualified and equipped
professional.
CAUTION
When the hybrid system is hot
Do not touch the radiator or condenser as they may be hot and cause serious
injuries, such as burns.
When the electric cooling fans are operating
Do not touch the engine compartment.
The electric cooling fans may keep rotating for about 3 minutes even after
the “POWER” switch is off.
With the “POWER” switch in ON mode, the electric cooling fans may auto-
matically start to run if the air conditioning is on and/or the coolant tempera-
ture is high. Be sure the “POWER” switch is off when working near the
electric cooling fans or radiator grille.

520
4-3. Do-it-yourself maintenance
CT200h_EE (OM76041E)
Checking and replacing fuses
If any of the electrical components do not operate, a fuse may have
blown. If this happens, check and replace the fuses as necessary.
Turn the “POWER” switch off.
Open the fuse box cover.
Engine compartment
Push the tab in and lift the lid
off.
Left side instrument panel (left-hand drive vehicles)
Remove the lid.STEP1
STEP2

534
4-3. Do-it-yourself maintenance
CT200h_EE (OM76041E)
Light bulbs
You may replace the following bulbs by yourself. The difficulty level
of replacement varies depending on the bulb. If necessary bulb
replacement seems difficult to perform, contact any authorized Lexus
dealer or repairer, or another duly qualified and equipped professional.
For more information about replacing other light bulbs, contact any
authorized Lexus dealer or repairer, or another duly qualified and
equipped professional.
Preparing for light bulb replacement
Check the wattage of the light bulb to be replaced. (P. 652)
Removing the engine compartment covers
P. 486
Front bulb locations
Halogen headlights
Front turn signalHeadlight low
Headlight high Front fog light

622
5-2. Steps to take in an emergency
CT200h_EE (OM76041E)
Start the engine of the second vehicle. Increase the
engine speed slightly and maintain at that level for
approximately 5 minutes to recharge the battery of your
vehicle.
Open and close any of the doors of your vehicle with the
“POWER” switch off.
Maintain the engine speed of the second vehicle and start
the hybrid system of your vehicle by turning the
“POWER” switch to ON mode.
Make sure the “READY” indicator light comes on. If the
indicator light does not come on, contact any authorized
Lexus dealer or repairer, or another duly qualified and
equipped professional.
Once the hybrid system has started, remove the jumper
cables in the exact reverse order from which they were
connected.
To install the engine cover, conduct the removal proce-
dure in reverse. After installing, check that the fixed pins
are inserted securely.
Once the hybrid system starts, have the vehicle inspected at any
th i d L d l i th d l lifi dSTEP4
STEP5
STEP6
STEP7
STEP8
STEP9

5
627
5-2. Steps to take in an emergency
When trouble arises
CT200h_EE (OM76041E)
If your vehicle overheats
Correction procedures
If the high coolant temperature warning light comes on or
flashes
Stop the vehicle in a safe place and turn off the air condi-
tioning system.
Check to see if steam is coming out from the engine area.
If you see steam:
Stop the hybrid system. Carefully lift the hood after the
steam subsides and then restart the hybrid system.
If you do not see steam:
Leave the hybrid system operating and carefully lift the
hood.
Check to see if the cooling fans are operating.
If the fans are operating:
Wait until the high coolant temperature warning light goes
off and then stop the hybrid system.
If the fans are not operating:
Stop the hybrid system immediately and call any authorized
Lexus dealer or repairer, or another duly qualified and
equipped professional.
The following may indicate that your vehicle is overheating:
The high coolant temperature warning light comes on or
flashes:
The engine may be overheating.
“HYBRID SYSTEM OVERHEAT” is shown on the multi-
information display:
STEP1
STEP2
STEP3

628
5-2. Steps to take in an emergency
CT200h_EE (OM76041E)After the hybrid system has
cooled down sufficiently, check
the engine coolant level and
inspect the cooling system for
leaks.
If the engine compartment
cover needs to be removed: P.
486
Add engine coolant if neces-
sary.
Water can be used in an emer-
gency if engine coolant is
unavailable. (P. 645)
Have the vehicle inspected at the nearest authorized Lexus dealer
or repairer, or another duly qualified and equipped professional as
soon as possible.
STEP4
STEP5

5
629
5-2. Steps to take in an emergency
When trouble arises
CT200h_EE (OM76041E)If “HYBRID SYSTEM OVERHEAT” is shown on the multi-
information display
Stop the vehicle in a safe place and turn off the air condi-
tioning system.
Leave the hybrid system operating and carefully lift the
hood.
Check if the cooling fans are operating.
If the fans are operating:
Wait until the “HYBRID SYSTEM OVERHEAT” message
disappears and then stop the hybrid system.
If the message does not disappear, call any authorized
Lexus dealer or repairer, or another duly qualified and
equipped professional.
If the fans are not operating:
Stop the hybrid system immediately and call any authorized
Lexus dealer or repairer, or another duly qualified and
equipped professional.
After the hybrid system has
cooled down, check the power
control unit coolant level and
inspect the cooling system for
leaks.
If the engine compartment
cover needs to be removed: P.
486
STEP1
STEP2
STEP3
STEP4

5
631
5-2. Steps to take in an emergency
When trouble arises
CT200h_EE (OM76041E)
CAUTION
To prevent an accident or injury when inspecting under the hood of your
vehicle
If steam is seen coming from under the hood, do not open the hood until
the steam has subsided. The engine compartment may be very hot, caus-
ing serious injuries such as burns.
Check that the indicator on the “POWER” switch and the “READY” indi-
cator are off.
For vehicles with a hybrid system, there are times when the gasoline
engine automatically starts to run or the cooling fans suddenly start to
operate. Do not touch or approach the rotating parts of the belt or fans.
Doing so may lead to fingers, clothes or tools getting caught, resulting in
injury.
Do not loosen the coolant reservoir cap while the hybrid system and radi-
ator are hot.
Serious injury, such as burns, may result from hot coolant and steam
released under pressure.
NOTICE
When adding engine/power control unit coolant
Wait until the hybrid system has cooled down before adding engine/power
control unit coolant.
When adding coolant, do so slowly. Adding cool coolant to a hot hybrid sys-
tem too quickly can cause damage to the hybrid system.