697
SIENNA_OM_OM45483U_(U)
4-3. Do-it-yourself maintenance
NOTICE
■Repairing or replacing tires, wheels, tire pressure warning valves,
transmitters and tire valve caps ●When removing or fitting the wheels, tires or the tire pressure warning valves and transmitters, contact your Toyota dealer as the tire pres- sure warning valves and transmitters may be damaged if not handled correctly.
●When replacing tire valve caps, do not use tire valve caps other than
those specified. The cap may become stuck.
■To avoid damage to the tire pressure warning valves and transmit-
ters When a tire is repaired with liquid sealants, the tire pressure warning valve and transmitter may not operate properly. If a liquid sealant is used, contact your Toyota dealer or other qualified service shop as soon as possible. Make sure to replace the tire pressure warning valve and transmitter when replacing the tire. (P. 690)
■Driving on rough roads
Take particular care when driving on roads with loose surfaces or pot- holes. These conditions may cause losses in tire inflation pressure, reducing the cushioning ability of the tires. In addition, driving on rough roads may cause damage to the tires themselves, as well as the vehicle’s wheels and body.
■If tire inflation pressure of each tire becomes low while driving Do not continue driving, or your tires and/or wheels may be ruined.
698
SIENNA_OM_OM45483U_(U)
4-3. Do-it-yourself maintenance Tire inflation pressure
■ Tire inflation pressure
The recommended cold tire inflation pressure and tire size are displayed on the tire and loading information label. (P. 807)
699
SIENNA_OM_OM45483U_(U)
4-3. Do-it-yourself maintenance
■ Inspection and adjustment procedure
Tire valve Tire pressure gauge
STEP 1
STEP 2
STEP 3
STEP 4
STEP 5
STEP 6
Remove the tire valve cap. Press the tip of the tire pressure gauge onto the tire valve. Read the pressure using the gauge gradations. If the tire inflation pressure is not at the recommended lev- els, adjust the pressure. If you add too much air, press the center of the valve to deflate. After completing the tire inflation pressure measurement and adjustment, apply soapy water to the valve and check for leakage. Put the tire valve cap back on.
700
SIENNA_OM_OM45483U_(U)
4-3. Do-it-yourself maintenance
■Tire inflation pressure check interval
You should check tire inflation pressure every two weeks, or at least once a month. Do not forget to check the spare.
■Effects of incorrect tire inflation pressure
Driving with incorrect tire inflation pressure may result in the following: ●Reduced fuel efficiency ●Reduced driving comfort and tire life ●Reduced safety ●Damage to the drive train If a tire needs frequent refilling, have it checked by your Toyota dealer.
■Instructions for checking tire inflation pressure
When checking tire inflation pressure, observe the following: ●Check only when the tires are cold.
If your vehicle has been parked for at least 3 hours or has not been driven for more than 1 mile or 1.5 km, you will get an accurate cold tire inflation pressure reading.
●Always use a tire pressure gauge.
The appearance of the tire can be misleading. In addition, tire infla- tion pressure that is even just a few pounds off can affect ride quality and handling.
●Do not reduce tire inflation pressure after driving. It is normal for tire
inflation pressure to be higher after driving. ●Never exceed the vehicle capacity weight.
Passengers and luggage weight should be placed so that the vehicle is balanced.
701
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4-3. Do-it-yourself maintenance
CAUTION
■Proper inflation is critical to save tire performance
Keep your tires properly inflated. Otherwise, the following conditions may occur and result in an accident causing death or serious injury. ●Excessive wear ●Uneven wear ●Poor handling ●Possibility of blowouts resulting from overheated tires ●Poor sealing of the tire bead ●Wheel deformation and/or tire separation ●A greater possibility of tire damage from road hazards
NOTICE
■When inspecting and adjusting tire inflation pressure
Be sure to put the tire valve caps back on. Without the valve caps, dirt or moisture could get into the valve and cause air leakage, which could result in an accident. If the caps are lost, replace them as soon as possible.
702
SIENNA_OM_OM45483U_(U)
4-3. Do-it-yourself maintenance Wheels
If a wheel is bent, cracked or heavily corroded, it should be replaced. Otherwise, the tire may separate from the wheel or cause a loss of handling control. ■ Wheel selection
When replacing wheels, care should be taken to ensure that they are equivalent to those removed in load capacity, diameter, rim width and inset*. Replacement wheels are available at your Toyota dealer. *: Conventionally referred to as “offset”. Toyota does not recommend using the following: ● Wheels of different sizes or types ● Used wheels ● Bent wheels that have been straightened
■ Aluminum wheel precautions
● Use only Toyota wheel nuts and wrenches designed for use
with your aluminum wheels.
● When rotating, repairing or changing your tires, check that the
wheel nuts are still tight after driving 1000 miles (1600 km).
● Be careful not to damage the aluminum wheels when using
tire chains.
● Use only Toyota genuine balance weights or equivalent and use a plastic or rubber hammer when balancing your wheels.
703
SIENNA_OM_OM45483U_(U)
4-3. Do-it-yourself maintenance
■When replacing wheels
The wheels of your vehicle are equipped with tire pressure warning valves and transmitters that allow the tire pressure warning system to provide advanced warning in the event of a loss in tire inflation pressure. Whenever wheels are replaced, tire pressure warning valves and trans- mitters must be installed. (P. 690)
CAUTION
■When replacing wheels
●Do not use wheels that are a different size from those recommended in
the Owner’s Manual, as this may result in a loss of handling control.
●Never use an inner tube in a leaking wheel which is designed for a tubeless tire. Doing so may result in an accident, causing death or seri- ous injury.
704
SIENNA_OM_OM45483U_(U)
4-3. Do-it-yourself maintenance
CAUTION
■When installing the wheel nuts
Tapered portion
facing
tapered ends
●Be sure to install the wheel nuts with the inward. Installing the nuts with the tapered ends facing outward can cause the wheel to break and eventually cause the wheel to come off while driving, which could lead to an accident resulting in death or serious injury.
●Never use oil or grease on the wheel bolts or wheel nuts.
Oil and grease may cause the wheel nuts to be excessively tightened, leading to bolt or disc wheel damage. In addition, the oil or grease can cause the wheel nuts to loosen and the wheel may fall off, causing an accident and resulting in death or serious injury. Remove any oil or grease from the wheel bolts or wheel nuts.
NOTICE
■Replacing tire pressure warning valves and transmitters
●Because tire repair or replacement may affect the tire pressure warning valves and transmitters, make sure to have tires serviced by your Toyota dealer or other qualified service shop. In addition, make sure to purchase your tire pressure warning valves and transmitters at your Toyota dealer.
●Ensure that only genuine Toyota wheels are used on your vehicle.
Tire pressure warning valves and transmitters may not work properly with non-genuine wheels.
705
SIENNA_OM_OM45483U_(U)
4-3. Do-it-yourself maintenance Air conditioning filter
The air conditioning filter must be changed regularly to maintain air
conditioning efficiency.
■ Removal method
STEP 1
Turn the engine switch (vehicles without a smart key sys- tem) or “ENGINE START STOP” switch (vehicles with a smart key system) off.
STEP 2
STEP 3
Open the glove box. Slide off the damper.
Push in each side of the glove box to disconnect the claws.
STEP 4
Remove the filter cover.
706
SIENNA_OM_OM45483U_(U)
4-3. Do-it-yourself maintenance
STEP 5
Remove the filter.
The“UP” marks shown on the filter should be pointing up.
■Checking interval
Replace the air conditioning filter according to the maintenance schedule. In dusty areas or areas with heavy traffic flow, more frequent cleaning or early replacement may be required. (For scheduled maintenance information, please refer to the “Scheduled Maintenance Guide” or “Owner’s Manual Supplement”.)
■If air flow from the vents decreases dramatically
The filter may be clogged. Check the filter and replace it if necessary.
NOTICE
■When using the air conditioning system
Make sure that a filter is always installed. Using the air conditioning system without a filter may cause damage to the system.
707
SIENNA_OM_OM45483U_(U)
4-3. Do-it-yourself maintenance Wireless remote control/electronic key battery
Replace the battery with a new one if it is discharged. ■ You will need the following items:
● Flathead screwdriver
● Lithium battery CR2032
■ Replacing the battery (vehicles without a smart key system)
Remove the cover using a
STEP 1
coin protected with tape etc.
STEP 2
Remove the discharged trans- mitter battery.
Insert a new battery with the “+” terminal facing up.
708
SIENNA_OM_OM45483U_(U)
4-3. Do-it-yourself maintenance
■ Replacing the battery (vehicles with a smart key system)
STEP 1
Take out the mechanical key.
STEP 2
Remove the cover.
To prevent damage to the key, cover the tip of the screwdriver with a rag.
STEP 3
Remove the depleted battery. Insert a new battery with the “+” terminal facing up.
709
SIENNA_OM_OM45483U_(U)
4-3. Do-it-yourself maintenance
■Use a CR2032 lithium battery
●Batteries can be purchased at your Toyota dealer, local electrical appli-
ance shops or camera stores.
●Replace only with the same or equivalent type recommended by the
manufacturer.
●Dispose of used batteries according to local laws.
■If the key battery is depleted
The following symptoms may occur. ●The smart key system (if equipped) and wireless remote control will not
function properly.
●The operational range will be reduced.
CAUTION
■Removed battery and other parts
These parts are small and if swallowed by a child, they can cause choking. Keep away from children. Failure to do so could result in death or serious injury.
NOTICE
■For normal operation after replacing the battery
Observe the following precautions to prevent accidents. ●Always work with dry hands.
Moisture may cause the battery to rust.
●Do not touch or move any other components inside the remote control. ●Do not bend either of the battery terminals.
710
SIENNA_OM_OM45483U_(U)
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.
STEP 1
STEP 2
Vehicles without a smart key system Turn the engine switch off. Vehicles with a smart key system Turn the “ENGINE START STOP” switch OFF. Open the fuse box cover.
Engine compartment
Push the tab in and lift the lid off.
Driver’s side instrument panel
Remove the lid.
SIENNA_OM_OM45483U_(U)
711
4-3. Do-it-yourself maintenance
STEP 3
STEP 4
After a system failure, see “Fuse layout and amperage rat- ings” (P. 714) for details about which fuse to check. Take out the pullout tool.
Only type A fuses can be removed using the pullout tool.
STEP 5
Check if the fuse has blown.
Normal fuse Blown fuse Replace the blown fuse with a new fuse of an appropriate amperage rating. The amper- age rating can be found on the fuse box lid.
Normal fuse Blown fuse Replace the blown fuse with a new fuse of an appropriate amperage rating. The amper- age rating can be found on the fuse box lid.
ITY42C012
ITY42C013
Type A
Type B
712
SIENNA_OM_OM45483U_(U)
4-3. Do-it-yourself maintenance
Normal fuse Blown fuse Contact your Toyota dealer.
Normal fuse Blown fuse Contact your Toyota dealer.
Normal fuse Blown fuse Contact your Toyota dealer.
713
Type C
Type D
Type E
SIENNA_OM_OM45483U_(U)
4-3. Do-it-yourself maintenance
Fuse layout and amperage ratings
■ Engine compartment
Fuse
H-LP LVL*1
Ampere 7.5 A
DSS1
ST NO.2
H-LP LH*1
H-LP RH*1
7.5 A
7.5 A
20 A 20 A
Circuit
Headlight leveling system PCS (Pre-collision system), dynamic radar cruise control sys- tem Starting system, multiport fuel injection system/sequential multi- port fuel injection system Left-hand headlight (low beam) Right-hand headlight (low beam)
714
SIENNA_OM_OM45483U_(U)
4-3. Do-it-yourself maintenance
Fuse
Ampere
Circuit
ECT
EFI NO.2
H-LP RH HI H-LP LH HI
10 SPARE
11 SPARE
12 SPARE
13 MG CLT
14
15 A/C RR
16 PBD
17 FOLD SEAT
18 HTR
19 PSB
20 A/A SEAT
INV
7.5 A
10 A
10 A 10 A 10 A 15 A 20 A 7.5 A 20 A 40 A 30 A 30 A 50 A 30 A 30 A
Multiport fuel injection system/ sequential multiport fuel injection system, automatic transaxle Multiport fuel injection system/ sequential multiport fuel injection system Right-hand headlight (high beam) Left-hand headlight (high beam) Spare-fuse Spare-fuse Spare-fuse A/C magnetic clutch Inverter Rear air conditioning system Power back door Power third seat Air conditioning system Pre-collision seat belt AUTO ACCESS SEAT
SIENNA_OM_OM45483U_(U)
715
4-3. Do-it-yourself maintenance
Fuse
Ampere
21 FAN
22 HAZ
23 RSE
24 MIRROR
25 AMP
26 VSC NO.2
27 ST
28 P/I
29
H-LP MAIN*1
SPARE*2
30 AM2*3
31 VSC NO.1
60 A
15 A
15 A
10 A
30 A
30 A
30 A
40 A
40 A 30 A
30 A
50 A
Circuit Electric cooling fans Turn signal lights, gauges and meters Rear seat entertainment system Outside rear view mirror control, outside rear view mirror heaters Audio system Vehicle dynamics integrated man- agement, ABS, vehicle stability control Starting system Horn, left-hand headlight (low beam), right-hand headlight (low beam) Discharge headlight Spare-fuse “ST NO.2”, “GAUGE NO.2” and “IG2” fuses Vehicle dynamics integrated man- agement, ABS, vehicle stability control
716
SIENNA_OM_OM45483U_(U)
4-3. Do-it-yourself maintenance
Fuse
Ampere
Circuit
32 ALT
140 A
33 RAD NO.1
15 A
34 DOME
7.5 A
35 ECU-B
10 A
36 ETCS
37 A/F
38 STRG LOCK*4
39 ALT-S
10 A
20 A
20 A 7.5 A
Charging system, horn, left-hand headlight (low beam), right-hand headlight (low beam), fog light, out- side rear view mirror heaters, rear window defoggers, windshield wiper de-icer Audio system Vanity lights, personal/interior lights, personal lights, engine switch light, rear ceiling lights, door courtesy lights, luggage compart- ment light, gauges and meters, clock Main body ECU, smart key system, wireless remote control, power back door, power sliding door, rear view monitor, multi information dis- play, power window, outside rear view mirror control, steering angle sensor, auto-anti glare inside rear view mirror, AUTO ACCESS SEAT remote control, front passenger occupant classification system Multiport fuel injection system/ sequential multiport fuel injection system Multiport fuel injection system/ sequential multiport fuel injection system Steering lock system Charging system
SIENNA_OM_OM45483U_(U)
717
4-3. Do-it-yourself maintenance
Fuse
Ampere
Circuit
40
INJ
41 ECU-B NO.2
42 AM2 NO.2*4
43 EFI NO.1
44 SMART*4
45 DRL
46 EPS
25 A
7.5 A
7.5 A
25 A
5 A
30 A
60 A
Multiport fuel injection system/ sequential multiport fuel injection system, “IG NO.2” and “IG2” fuses Air conditioning system Multiplex communication system, starting system Multiport fuel injection system/ sequential multiport fuel injection system, “ECT” and “EFI NO.2” fuses Smart key system Daytime running light system, “H- LP LH (HI)” and “H-LP RH (HI)” fuses Electric power steering
*1: Vehicles with discharge headlights only *2: Vehicles without discharge headlights only *3: Vehicles without a smart key system only *4: Vehicles with a smart key system only
718
SIENNA_OM_OM45483U_(U)
4-3. Do-it-yourself maintenance
■ Under the driver’s side instrument panel
Fuse
P/OUTLET
RAD NO.2
ECU-ACC
CIG
Ampere
15 A
7.5 A
10 A
15 A
5 GAUGE NO.1
10 A
Circuit
Power outlets Audio system, navigation system, rear seat entertainment system Main body ECU, clock, shift lock system, power rear view mirror control, multiplex communication system Power outlets Emergency flashers, back up lights, navigation system, multi information display, automatic tran- saxle, multiport fuel injection sys- tem/sequential multiport fuel injection system, charging system
SIENNA_OM_OM45483U_(U)
719
4-3. Do-it-yourself maintenance
Fuse
Ampere
Circuit
Multiplex communication system, stop lights, navigation system, vehicle stability control system, Active Torque Control 4WD, intui- tive parking assist, auto anti-glare inside rear view mirror, pre-collision seat belt, outside rear view mirror, seat heater, TPMS, yaw rate & G sensor, steering angle sensor, AUTO ACCESS SEAT, main body ECU, Blind Spot Monitor Rear power windows (left-side) Power door lock system Power front seat (right-side) Moon roof Rear power windows (right-side) Front power windows (right-side) Power front seat (left-side), driving position memory system Stop lights, ABS, vehicle stability control system, rear combination light, high mounted stop light, auto- matic transaxle, shift lock system, multiplex communication system, power third seat switch, multiport fuel injection system/sequential multiport fuel injection system, trailer lights (stop lights) Front power windows (left-side)
ECU-IG NO.1
10 A
P/W RL D/L P/SEAT FR
10 S/ROOF 11 P/W RR 12 P/W FR
13 P/SEAT FL
20 A 15 A 30 A 30 A 20 A 20 A
30 A
14 STOP
10 A
15 P/W FL
20 A
720
SIENNA_OM_OM45483U_(U)
4-3. Do-it-yourself maintenance
Fuse
16 PSD LH
17
4WD
18 AM1
19 GAUGE NO.2
Ampere
25 A 7.5 A 10 A
7.5 A
20
IG2
7.5 A
21 PANEL
10 A
Circuit
Power sliding door (left-side) Active Torque Control 4WD Starting system Gauges and meters, multi informa- tion display Automatic transaxle, multiport fuel injection system/sequential multi- port fuel injection system, SRS air- bag system, front passenger occupant classification system, steering lock system, smart key system, starting system, fuel pump Air conditioning system, navigation system, front passenger’s seat belt reminder light, audio system, steer- ing switch, intuitive parking assist switch, personal/interior light main switch, shift lever light, headlight leveling switch, power door lock main switch, clock, power quarter window switch, seat heater switch, emergency flashers, rear window defogger switch, vehicle stability control off switch, console box light, power slide switch light
SIENNA_OM_OM45483U_(U)
721
4-3. Do-it-yourself maintenance
Fuse
Ampere
Circuit
22 TAIL
23 WIP ECU
24 P/VENT 25 AFS 26 WIP 27 WASHER 28 WIP RR 29 WASHER RR 30 HTR-IG
10 A
7.5 A
15 A 10 A 30 A 20 A 20 A 15 A 10 A
31 SHIFT LOCK
7.5 A
32 ECU-IG NO.2
10 A
33 PSD RH 34 OBD 35 S-HTR FL 36 S-HTR FR
25 A 7.5 A 15 A 15 A
Tail lights, trailer lights (tail lights), license plate light, rear combination lights Windshield wiper and rear window wiper Power quarter windows Automatic High Beam Windshield wiper Windshield washer Rear window wiper Rear window washer Air conditioning system Shift lock system, multiport fuel injection system/sequential multi- port fuel injection system Pre-collision system, pre-collision seat belt, dynamic radar cruise control, electric power steering, rain-sensing windshield wipers, driving position memory system, power sliding door, power third seat, power back door, multiplex communication system Power sliding door (right-side) On-board diagnosis system Seat heater (left-side) Seat heater (right-side)
722
SIENNA_OM_OM45483U_(U)
4-3. Do-it-yourself maintenance
■After a fuse is replaced
●If the lights do not turn on even after the fuse has been replaced, a bulb
may need replacement. (P. 724)
●If the replaced fuse blows again, have the vehicle inspected by your
Toyota dealer.
■If there is an overload in the circuit
The fuses are designed to blow, protecting the wiring harness from damage.
■When replacing light bulbs
Toyota recommends that you use genuine Toyota products designed for this vehicle. Because certain bulbs are connected to circuits designed to prevent overload, non-genuine parts or parts not designed for this vehicle may be unusable.
CAUTION
■To prevent system breakdowns and vehicle fire
Observe the following precautions. Failing to do so may cause damage to the vehicle, and possibly a fire or injury. ●Never use a fuse of a higher amperage rating than that indicated, or use
any other object in place of a fuse.
●Always use a genuine Toyota fuse or equivalent.
Never replace a fuse with a wire, even as a temporary fix.
●Do not modify the fuses or fuse boxes.
NOTICE
■Before replacing fuses
Have the cause of electrical overload determined and repaired by your Toyota dealer as soon as possible.
723
SIENNA_OM_OM45483U_(U)
4-3. Do-it-yourself maintenance 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 your Toyota dealer. For more information about replacing other light bulbs, contact your Toyota dealer. ■ Preparing for light bulb replacement
Check the wattage of the light bulb to be replaced. (P. 809)
■ Turning off the power back door main switch
P. 84
■ Front bulb locations
Headlight high beam and daytime running lights
Headlight low beam
Fog light
Front turn signal/parking and front side marker lights
724
SIENNA_OM_OM45483U_(U)
■ Rear bulb locations
Rear turn signal light
Back-up light
4-3. Do-it-yourself maintenance
Tail light
License plate lights
Replacing light bulbs
■ Headlight low beams (halogen bulb)
STEP 1
For left side only: Open the fuse box cover. (P. 711) Unplug pushing the lock release.
the connector while
STEP 2
725
SIENNA_OM_OM45483U_(U)
4-3. Do-it-yourself maintenance
STEP 3
Turn the bulb base counterclock- wise.
■ Headlight high beams and daytime running lights
STEP 1
For left side only: Open the fuse box cover. (P. 711)
Turn the bulb base counterclock- wise.
Unplug pushing the lock release.
the connector while
ITO43P165
STEP 2
STEP 3
726
SIENNA_OM_OM45483U_(U)
4-3. Do-it-yourself maintenance
■ Front fog lights (if equipped)
STEP 1
Remove the engine under cover bolt and pull down the engine under cover.
Unplug pushing the lock release.
the connector while
Turn the bulb base counterclock- wise.
727
STEP 2
STEP 3
SIENNA_OM_OM45483U_(U)
4-3. Do-it-yourself maintenance
■ Front turn signal/parking and front side marker lights
STEP 1
For left side only: Open the fuse box cover. (P. 711)
Vehicles without discharge headlights
STEP 2
Turn the bulb base counterclock- wise.
Vehicles with discharge headlights
STEP 2
STEP 3
Remove the light bulb.
728
SIENNA_OM_OM45483U_(U)
4-3. Do-it-yourself maintenance
■ Rear turn signal lights
STEP 1
Remove the securing bolts and remove the unit.
STEP 2
Turn the bulb base counterclock- wise.
Gasket
STEP 3
Remove the light bulb.
729
SIENNA_OM_OM45483U_(U)
4-3. Do-it-yourself maintenance
■ Tail and back-up lights
STEP 1
STEP 2
STEP 3
Remove board.
the back door
trim
Turn the bulb base counterclock- wise.
Tail light Back-up light
Remove the light bulb.
Tail light Back-up light
730
SIENNA_OM_OM45483U_(U)
4-3. Do-it-yourself maintenance
■ License plate lights
STEP 1
Remove board.
the back door
trim
STEP 2
Turn the bulb base counterclock- wise.
STEP 3
Remove the light bulb.
731
SIENNA_OM_OM45483U_(U)
4-3. Do-it-yourself maintenance
■ Lights other than the above
If any of the lights listed below has burnt out, have it replaced by your Toyota dealer. ● Headlight low beams (discharge bulbs) ● High mounted stoplight ● Side turn signal light (if equipped) ● Stop/tail and rear side marker lights ● Outer foot lights (if equipped)
■Discharge headlights (if equipped)
If voltage to the discharge bulbs is insufficient, the bulbs may not come on, or may go out temporarily. The discharge bulbs will come on when normal power is restored.
■LED lights
The stop/tail, side turn signal light, rear side marker lights and high mounted stoplight consists of a number of LEDs. If any of the LEDs burn out, take your vehicle to your Toyota dealer to have the light replaced.
■Condensation build-up on the inside of the lens
Temporary condensation build-up on the inside of the headlight lens does not indicate a malfunction. Contact your Toyota dealer for more information in the following situations: ●Large drops of water have built up on the inside of the lens. ●Water has built up inside the headlight.
■When replacing light bulbs
P. 723
732
SIENNA_OM_OM45483U_(U)
4-3. Do-it-yourself maintenance
CAUTION
■Replacing light bulbs
●Turn off the lights. Do not attempt to replace the bulb immediately after
turning off the lights. The bulbs become very hot and may cause burns.
●Do not touch the glass portion of the light bulb with bare hands. When it is unavoidable to hold the glass portion, use and hold with a clean dry cloth to avoid getting moisture and oils on the bulb. Also, if the bulb is scratched or dropped, it may blow out or crack.
●Fully install light bulbs and any parts used to secure them. Failure to do so may result in heat damage, fire, or water entering the headlight unit. This may damage the headlights or cause condensation to build up on the lens. ●Do not attempt to repair or disassemble the bulb, socket, electrical wiring,
or sub components. This may cause serious injury due to electric shock.
●Vehicles with discharge headlights:
While the low beam headlights are turned on, and for a short time after they have been turned off, metal com- ponents at the rear of the headlight assembly will be extremely hot. To pre- vent burns, do not touch these metal components until you are certain they have cooled down.
Metal components
733
SIENNA_OM_OM45483U_(U)
4-3. Do-it-yourself maintenance
CAUTION
■Discharge headlights (if equipped)
●Contact your Toyota dealer before replacing discharge headlights (includ-
ing light bulbs).
●Do not touch the discharge headlight’s high voltage socket when the head-
lights are turned on. An extremely high voltage of 30000 V will be discharged and could result in serious injury or death by electric shock.
●Do not attempt to take apart or repair the low beam headlight bulbs, con-
nectors, power supply circuits, or related components. Doing so could result in electric shock and serious injury or death.
■When replacing the rear turn signal lights
Inspect the gasket for any damage (rip, tear, hole, etc.). If there is any dam- age, please contact your Toyota dealer and have the gasket replaced. Improper installation of the gasket may result in water entering the rear light unit.
■To prevent damage or fire
Make sure bulbs are fully seated and locked.
NOTICE
■When installing the back door trim
To prevent damage, be careful not to pinch any of the wire harnesses or connectors with the back door trim.
734
SIENNA_OM_OM45483U_(U)
When trouble arises
5-1. Essential information
Emergency flashers ......... 736
If your vehicle needs
to be towed .................... 737
If you think something
is wrong ......................... 741
Fuel pump shut off
system ........................... 742
5-2. Steps to take in an
emergency
If a warning light turns
on or a warning buzzer
sounds... ....................... 743
If a warning message is
displayed........................ 758
If you have a flat tire
(vehicles with
run-flat tires)................... 759
If you have a flat tire
(vehicles with
standard tires)................ 761
If the engine will
not start.......................... 776
If the shift lever cannot
be shifted from P............ 778
If you lose your keys ........ 780
If the electronic key does
not operate properly....... 781
If the battery is
discharged ..................... 784
If your vehicle
overheats ....................... 790
If the vehicle becomes
stuck .............................. 793
If your vehicle has
to be stopped in an
emergency ..................... 795
735
SIENNA_OM_OM45483U_(U)
5-1. Essential information Emergency flashers
Use the emergency flashers if the vehicle malfunctions or is involved in an accident.
Press the switch to flash all the turn signal lights. To turn them off, press the switch once again.
NOTICE
■To prevent battery discharge
Do not leave the emergency flashers on longer than necessary when the engine is not running.
736
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5-1. Essential information If your vehicle needs to be towed
If towing is necessary, we recommend having your vehicle towed by your Toyota dealer or a commercial towing service, using a wheel-lift type truck or flat bed truck. Use a safety chain system for all towing, and abide by all state/pro- vincial and local laws. 2WD models: If towing your vehicle with a wheel-lift type truck from the front, the vehicle’s rear wheels and axles must be in good condi- tions. (P. 738, 740) If they are damaged, use a towing dolly or flat bed truck. AWD models: If towing your vehicle with a wheel-lift type truck, use a towing dolly. (P. 738, 740)
Before towing
The following may indicate a problem with your transaxle. Contact your Toyota dealer before towing. ● The engine is running but the vehicle will not move. ● The vehicle makes an abnormal sound.
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5-1. Essential information
Towing with a sling-type truck
Do not tow with a sling type truck to prevent body damage.
Towing with a wheel-lift type truck
From the front (2WD models)
Release the parking brake.
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5-1. Essential information
From the front (AWD models)
Use a towing dolly under the rear wheels.
From the rear
Use a towing dolly under the front wheels.
Using a flatbed truck
If you use chains or cables to tie down your vehicle, the angles shaded in black must be 45. Do not overly tighten the tie downs or the vehicle may be damaged.
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5-1. Essential information
NOTICE
■To prevent body damage when towing with a sling-type truck
Do not tow with a sling-type truck, either from the front or rear.
■To prevent causing serious damage to the transaxle and Active Torque Control 4WD system (AWD models) when towing using a wheel-lift type truck
2WD models: Never tow this vehicle from the rear with the front wheels on the ground. This may cause serious damage to the transaxle. If towing from the rear, use a towing dolly.
AWD models: Never tow this vehicle with any of the wheels on the ground. This may cause serious damage to the tran- saxle and Active Torque Control 4WD system. Use a towing dolly.
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■To prevent damaging the vehicle when towing using a wheel-lift type
truck When raising the vehicle, ensure adequate ground clearance for towing at the opposite end of the raised vehicle. Without adequate clearance, the vehicle could be damaged while being towed.
■Recreational towing (behind motor home, etc.)
Never dinghy tow your vehicle to prevent causing serious damage to the Active Torque Control 4WD system (AWD models) and transaxle. (P. 393)
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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 Toyota dealer as soon as possible. ■ Visible symptoms
● Fluid leaks under the vehicle
(Water dripping from the air conditioning after use is normal.)
● Flat-looking tires or uneven tire wear ● Engine coolant temperature gauge needle continually points
higher than normal ■ Audible symptoms
● Changes in exhaust sound ● Excessive tire squeal when cornering ● Strange noises related to the suspension system ● Pinging or other noises related to the engine
■ Operational symptoms
● Engine missing, stumbling or running rough ● Appreciable loss of power ● Vehicle pulls heavily to one side when braking ● Vehicle pulls heavily to one side when driving on a level road ● Loss of brake effectiveness, spongy feeling, pedal almost
touches the floor
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5-1. Essential information Fuel pump shut off system
To minimize the risk of fuel leakage when the engine stalls or when an airbag inflates upon collision, the fuel pump shut off system stops the supply of fuel to the engine.
Follow the procedure below to restart the engine after the system is
activated.
Vehicles without a smart key system
STEP 1
Turn the engine switch to the “ACC” or “LOCK” position. Restart the engine.
STEP 2
Vehicles with a smart key system
STEP 1
Turn the “ENGINE START STOP” switch to ACCESSORY mode or turn it off. Restart the engine.
STEP 2
NOTICE
■Before starting the engine
Inspect the ground under the vehicle. If you find that fuel has leaked onto the ground, the fuel system has been damaged and is in need of repair. Do not restart the engine.
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5-2. Steps to take in an emergency If a warning light turns on or a warning buzzer sounds...
Calmly perform the following actions if any of the warning lights comes on or flashes. If a light comes on or flashes, but then goes off, this does not necessarily indicate a malfunction in the system. However, if this continues to occur, have the vehicle inspected by your Toyota dealer.
Stop the vehicle immediately. Continuing to drive the vehicle may be dangerous.
The following warning indicates a possible problem in the brake sys- tem. Immediately stop the vehicle in a safe place and contact your Toyota dealer.
Warning light
Warning light/Details
Brake system warning light (warning buzzer)* • Low brake fluid • Malfunction in the brake system This light also comes on when the parking brake is not released. If the light turns off after the parking brake is fully released, the system is operating normally.
(U.S.A.)
(Canada)
*: Parking brake engaged warning buzzer: A buzzer will sound if the vehicle is
driven at a speed of approximately 3 mph (5 km/h) or more.
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5-2. Steps to take in an emergency
Stop the vehicle immediately.
The following warnings indicate the possibility of damage to the vehi- cle that may lead to an accident. Immediately stop the vehicle in a safe place and contact your Toyota dealer.
Warning light
Warning light/Details
Charging system warning light Indicates a malfunction in the vehicle’s charging system
Low engine oil pressure warning light