2011 LEXUS RX350 air condition

495
4-3. Do-it-yourself maintenance
4

Maintenance and care
NOTICE
nTo prevent damage to the system
lWhen using the air conditioning system, make sure that a filter is always installed.
lWhen cleaning the filter, do not clean with water.

501
4-3. Do-it-yourself maintenance
4

Maintenance and care
Fuse layout and amperage ratings
nEngine compartment
FuseAmpereCircuit
1RDI FAN NO. 180 AElectric cooling fans
2RR DEF50 ARear window defogger
3AIR SUS50 A
4HTR50 AAir conditioning system
5SPARE30 A
6SPARE40 A
7ABS NO. 230 AAnti-lock brake system
8H-LP CLN30 AHeadlight cleaner
9PBD30 APower back door system
10ST30 AStarter system

503
4-3. Do-it-yourself maintenance
4

Maintenance and care
23ETCS10 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
24RAD NO. 110 AAudio system
25AM27. 5 AStarting system
26ECU-B NO. 27. 5 A
Air conditioning system, front passen-
ger occupant classification system,
starter system
27MAYDAY/TEL7. 5 AMayday system
28IMMOBI7. 5 A
29ALT-S7. 5 ACharging system
30IGN10 A
Starter system, multiport fuel injection
system/sequential multiport fuel injec-
tion system
31DOME10 A
Vanity mirror lights, luggage compart-
ment lights, interior lights, personal
lights
32ECU-B NO. 17. 5 A
Interior lights, personal lights, tilt and
telescopic steering, multiplex commu-
nication system, meters and gauges,
power window, driving position mem-
ory system, power seats, power back
door, head-up display, starter system,
air conditioning system, power door
lock system
33EFI NO. 110 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
34WIP-S7. 5 AWindshield wipers and washer
FuseAmpereCircuit

504
4-3. Do-it-yourself maintenance
35AFS7. 5 AAdaptive front-lighting system
36BK/UP LP7. 5 ABack-up lights
37HEATER NO. 27. 5 AAir conditioning system, AWD system
38ECU IG110 A
Adaptive front-lighting system, head-
light cleaner, cooling fan, cruise con-
trol, vehicle stability control, vehicle
dynamics integrated management
39EFI NO. 210 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
40F/ P U M P15 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
41DEICER25 AWindshield wipers and washer
42STOP7. 5 A
Vehicle stability control, vehicle
dynamics integrated management,
high mounted stoplight
43TOW I N G BAT T20 ATrailer battery
44TOW I N G30 ATrailer lights
45FILTER10 ACondenser
46IG1 MAIN30 AECU IG1, BK/UP LP,
HEATER NO. 2, AFS
47H-LP RH HI15 ARight-hand headlight (high beam)
48H-LP LH HI15 ALeft-hand headlight (high beam)
49BIXENON10 ADischarge headlight
50H-LP RH LO15 ARight-hand headlight (low beam)
51H-LP LH LO15 ALeft-hand headlight (low beam)
FuseAmpereCircuit

506
4-3. Do-it-yourself maintenance
6ECU-IG1 NO. 310 A
Outside rear view mirror, windshield
wipers and washer, seat heaters,
starter system, power outlet, moon
roof, Automatic High Beam
7ECU-IG1 NO. 110 A
Multiplex communication system,
electric power steering system, shift
lock control system, tilt and telescopic
steering, starter system, automatic
transmission system, power back
door, tire pressure warning system
8S/ROOF30 AMoon roof
9FUEL OPN7. 5 AFuel filler door opener
10PSB30 APre-collision seat belt
11TI & TE30 ATilt and telescopic steering system
12DR LOCK10 APower door lock system
13FR FOG15 AFront fog lights
14P-S E AT L H30 APo w e r s e a t ( l e f t - s i d e )
154WD7. 5 AAW D s y s t e m
16INVERTER20 A
17RR FOG7. 5 A
18D/L ALT B25 AMultiplex communication system
19HEATER10 AAir conditioning system
20ECU-IG1 NO. 210 A
Air conditioning system, multiport fuel
injection system/sequential multiport
fuel injection system, SRS airbag sys-
tem, multi-information display
FuseAmpereCircuit

507
4-3. Do-it-yourself maintenance
4

Maintenance and care
21PA N E L10 A
Switch illumination, navigation system,
headlight cleaner, windshield wiper
de-icer, seat heater, power back door,
audio system, multi-information dis-
play, air conditioning system
22TA I L10 A
Parking lights, side marker lights, tail
lights, license plate lights, front fog
lights, towing converter
23AIR SUS20 A
24P-S E AT R H30 APower seat (right-side)
25OBD7. 5 AOn-Board diagnosis
26FR DOOR25 AFront power window (right-side)
27RR DOOR25 ARear power window (right-side)
28FL DOOR25 AFront power window (left-side)
29RL DOOR25 ARear power window (left-side)
30FR WASH25 AWindshield wipers and washer
31RR WIP15 AWindshield wipers and washer
32RR WASH20 AWindshield wipers and washer
33FR WIP30 AWindshield wipers and washer
34ECU IG210 AStarter system, Intuitive parking assist,
AWD s y s t e m
35GAUGE NO. 27. 5 AStarter system
36RH S-HTR15 ASeat heater (right-side)
37LH S-HTR15 ASeat heater (left-side)
FuseAmpereCircuit

5

When trouble arises
531
5-1. Essential information
If you think something is wrong
If you notice any of the following symptoms, your vehicle probably needs
adjustment or repair. Contact your Lexus dealer as soon as possible.
nVisible symptoms
lFluid leaks under the vehicle.
(Water dripping from the air conditioning after use is normal.)
lFlat-looking tires or uneven tire wear
lEngine coolant temperature gauge needle continually points
higher than normal.
nAudible symptoms
lChanges in exhaust sound
lExcessive tire squeal when cornering
lStrange noises related to the suspension system
lPinging or other noises related to the engine
nOperational symptoms
lEngine missing, stumbling or running rough
lAppreciable loss of power
lVehicle pulls heavily to one side when braking
lVehicle pulls heavily to one side when driving on a level road
lLoss of brake effectiveness, spongy feeling, pedal almost touches
the floor

5

When trouble arises
587
5-2. Steps to take in an emergency
If your vehicle overheats
If your engine overheats:
Stop the vehicle in a safe place and turn off the air conditioning
system.
Check to see if steam is coming out from under the hood.
If you see steam:
Stop the engine. Carefully lift the hood after the steam sub-
sides and then restart the engine.
If you do not see steam:
Leave the engine running and carefully lift the hood.
Remove the engine compartment cover. (→P. 464)
Check to see if the cooling fan is operating.
If the fan is operating:
Wait until the temperature of the engine (shown on the instru-
ment panel) begins to fall and then stop the engine.
If the fan is not operating:
Stop the engine immediately and call your Lexus dealer.
After the engine has cooled
down sufficiently, check the
engine coolant level and inspect
the radiator core (radiator) for
any leaks.
STEP1
STEP2
STEP3
STEP4
STEP5