maintenance LEXUS RX350 2011 Repair Manual

496
4-3. Do-it-yourself maintenance
Electronic key battery
Replace the battery with a new one if it is depleted.
nYou will need the following items:
lFlathead screwdriver
lSmall Phillips-head screwdriver
lLithium battery (CR1632)
nReplacing the battery
Take out the mechanical key.
Remove the cover.
Remove the depleted battery.
Insert a new battery with the “+”
terminal facing up.
STEP1
STEP2
STEP3

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4-3. Do-it-yourself maintenance
4

Maintenance and care
nUse a CR1632 lithium battery
lBatteries can be purchased at your Lexus dealer, local electrical appliance
shops or camera stores.
lReplace only with the same or equivalent type recommended by the manufac-
turer.
lDispose of used batteries according to the local laws.
nIf the electronic key battery is discharged
The following symptoms may occur:
lThe smart access system with push-button start and wireless remote control will
not function properly.
lThe operational range is reduced.
nWhen the card key battery needs to be replaced (if equipped)
The battery for the card key is available only at Lexus dealers. Your Lexus dealer
can replace the battery for you.
CAUTION
nRemoved battery and other parts
Keep away from children. These parts are small and if swallowed by a child, they can
cause choking. Failure to do so could result in death or serious injury.
NOTICE
nFor normal operation after replacing the battery
Observe the following precautions to prevent accidents:
lAlways work with dry hands.
Moisture may cause the battery to rust.
lDo not touch or move any other components inside the remote control.
lDo not bend either of the battery terminals.

498
4-3. Do-it-yourself maintenance
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 “ENGINE START STOP” switch off.
Remove the engine compartment cover. (→P. 464)
Open the fuse box cover.
Engine compartment
Push the tab in and lift the lid off.
Driver's side instrument panel
Remove the lid.
After a system failure, see “Fuse layout and amperage ratings”
for details about which fuse to check. (→P. 501)
STEP1
STEP2
STEP3
STEP4

499
4-3. Do-it-yourself maintenance
4

Maintenance and care
Remove the fuse with the pull-
out tool.
Check if the fuse has blown.
Type A
Normal fuse
Blown fuse
Replace the blown fuse with a
new fuse of an appropriate
amperage rating. The amperage
rating can be found on the fuse
box lid.
Type B
Normal fuse
Blown fuse
Replace the blown fuse with a
new fuse of an appropriate
amperage rating. The amperage
rating can be found on the fuse
box lid.
STEP5
STEP6

500
4-3. Do-it-yourself maintenance
Type C
Normal fuse
Blown fuse
Replace the blown fuse with a
new fuse of an appropriate
amperage rating. The amperage
rating can be found on the fuse
box lid.
Type D
Normal fuse
Blown fuse
Replace the blown fuse with a
new fuse of an appropriate
amperage rating. The amperage
rating can be found on the fuse
box lid.
Type E
Normal fuse
Blown fuse
Replace the blown fuse with a
new fuse of an appropriate
amperage rating. The amperage
rating can be found on the fuse
box lid.

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

502
4-3. Do-it-yourself maintenance
11PD50 A
Daytime running light system, A/F,
H-LP RH HI, H-LP LH LO, H-LP RH
LO, H-LP LH HI, HORN, S-HORN,
multiplex communication system,
multiport fuel injection system/
sequential multiport fuel injection sys-
tem
12ABS NO. 150 AAnti-lock brake system
13EPS60 AElectric power steering system
14ALT140 A
FUEL OPN, DR LOCK, OBD, RR
FOG, S/ROOF, 4WD, INVERTER,
ECU IG1 NO. 1, ECU IG1 NO. 2,
PANEL, GAUGE NO. 1
15AMP130 AAudio system
16EFI MAIN30 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem, EFI NO. 1, EFI NO. 2
17AMP230 AAudio system
18IG230 AStarter system, IGN, GAUGE NO. 2,
ECU IG2
19IP JB25 APower door lock system
20STR LOCK20 AStarter system
21RAD NO. 315 A
Meters and gauges lights, instrument
panel lights, navigation system, audio
system, rear seat entertainment sys-
tem
22HAZ15 AEmergency flashers
FuseAmpereCircuit

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4-3. Do-it-yourself maintenance
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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

505
4-3. Do-it-yourself maintenance
4

Maintenance and care
nDriver’s side instrument panel
52HORN10 AHorn
53A/F20 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
54S-HORN7. 5 ASecurity horn
FuseAmpereCircuit
1P/ P O I N T15 APo w e r o u t l e t
2ECU-ACC10 A
Navigation system, outside rear view
mirror, multiplex communication sys-
tem, multi-information display, head-
up display
3CIG15 APo w e r o u t l e t
4RADIO NO. 27. 5 AAudio system, power outlet
5GAUGE NO. 110 AEmergency flashers, navigation sys-
tem, head-up display
FuseAmpereCircuit