2008 TOYOTA TUNDRA ECU

537
2008 TUNDRA from Apr. ’08 Prod. (OM 34477U)
Doors and engine hood
Check that all doors including tailgate op-
erate smoothly and all latches lock se-
curely. Make sure the engine hood sec-
ondary latch secures the hood from
opening when the primary latch is re-
leased.
Tire inflation pressure
Check the pressure with a gauge ev-
ery two weeks, or at least once a
month. See page 553 in Section 7 −2
for additional information.
Tire surface and wheel nuts
Check the tires carefully for cuts,
damage or excessive wear. See page
556 in Section 7− 2 for additional in-
formation. When checking the tires,
make sure no nuts are missing, and
check the nuts for looseness. Tighten
them if necessary. Tire rotation
Rotate the tires
according to the
maintenance schedule. (For
scheduled maintenance information,
please refer to the “Scheduled
Maintenance Guide” or “Owner ’s
Manual Supplement”.) See page 558
in Section 7 −2 for additional
information.
Be on the alert for changes in perfor-
mance, sounds, and visual tip −offs that
indicate service is needed. Some impor-
tant clues are as follows:
Engine missing, stumbling, or pinging
Appreciable loss of power
Strange engine noises
A leak under the vehicle (however, wa-
ter dripping from the air conditioning
after use is normal.)
Change in exhaust sound (This may
indicate a dangerous carbon monoxide
leak. Drive with the windows open and
have the exhaust system checked im-
mediately.)
Flat −looking tire; excessive tire squeal
when cornering; uneven tire wear
Vehicle pulls to one side when driving
straight on a level road
Strange noises related to suspension
movement
Loss of brake effectiveness; spongy
feeling brake or clutch pedal; pedal al-
most touches floor; vehicle pulls to one
side when braking
Engine coolant temperature continually
higher than normal
Does your vehicle need
repairing?

567
2008 TUNDRA from Apr. ’08 Prod. (OM 34477U)
Type A fuses can be pulled out by the
pull−out tool. The location of the pull −out
tool is shown in the illustration.
Type B fuses—When any of the fuses are
blown, contact your Toyota dealer.
If you are not sure whether the fuse has
blown, try replacing the suspected fuse
with one that you know is good.
If the fuse has blown, push a new fuse
into the clip.
Only install a fuse with the amperage rat-
ing designated on the fuse box lid.
If you do not have a spare fuse, in an
emergency you can pull out the “A/C”
fuse, which may be dispensable for nor-
mal driving, and use it if its amperage
rating is the same.
If you cannot use one of the same amper-
age, use one that is lower, but as close
to the rating as possible. If the amperage
is lower than that specified, the fuse
might blow out again but this does not
indicate anything wrong. Be sure to get
the correct fuse as soon as possible and
return the substitute to its original clip.
It is a good idea to purchase a set of
spare fuses and keep them in your ve-
hicle for emergencies. If the new fuse immediately blows out,
there is a problem with the electrical sys-
tem. Have your Toyota dealer correct it as
soon as possible.
You should normalize the moon roof if it
does not operate automatically or the jam
protection function does not operate cor-
rectly after replacing blown fuses. To
normalize the moon roof, see “Electric
moon roof” on page 43 in Section 1
−2.
CAUTION
Never use a fuse with a higher am-
perage rating, or any other object, in
place of a fuse. This may cause ex-
tensive damage and possibly a fire.
Make sure that the fuse box lid has been
closed securely after closing it. If any washer does not work or the low
windshield washer fluid level warning
light comes on, the washer tank may be
empty. Add washer fluid.
You may use plain water as washer fluid.
However, in cold areas where tempera-
tures range below the freezing point, use
washer fluid containing antifreeze. This
product is available at your Toyota dealer
and most auto parts stores. Follow the
manufacturer ’s directions for how much to
mix with water.
NOTICE
Do not use engine antifreeze or any
other substitute because it may dam-
age your vehicle’s paint.
Adding washer fluid

570
2008 TUNDRA from Apr. ’08 Prod. (OM 34477U)
XS73009
3. Plug in a new bulb install it into the
mounting hole.
Aiming is not necessary after replacing
the bulb. When aiming adjustment is nec-
essary, contact your Toyota dealer.
XS73010
4. Install the connector to the bulb.
If the battery has been moved, reinstall
the battery and check that the battery is
installed securely by wiggling it.
XS73003
1. Open the hood. Unplug the connector while depressing the lock release.
If the connector is tight, wiggle it.
—Headlights (low beam)

596
2008 TUNDRA from Apr. ’08 Prod. (OM 34477U)
XS73028
Instrument panel
14. ALTS 5 A: Charging system
15. TURNHAZ 15 A: Turn signal lights,
emergency flashers, towing converter
16. F/PMP 15 A: No circuit
17. ETCS 10 A: Multiport fuel injection
system/S equential multiport fuel injec-
tion system, electric throttle control
system
18. METB 5 A: Gauges and meters
19. AMP 30 A: Audio system, rear view
monitor, navigation system, rear seat
entertainment system 20. RAD NO.1 15 A:
Audio system, rear
view monitor, navigation system, rear
seat entertainment system
21. ECUB1 7.5 A: Multiplex communica-
tion system, Multiport fuel injection sys-
tem/sequential multiport fuel injection
system, auto anti− glare inside rear
view mirror, power outlets, power front
drivers seat, power tilt and telescopic
system
22. DOME 7.5 A: Interior lights, personal
lights, vanity lights, engine switch light,
foot light, door courtesy lights, acces-
sory meter
23. HEAD LH 15 A: Left−hand headlight
(high beam)
24. HEAD LL 15 A: Left−hand headlight
(low beam)
25. INJ 10 A: Multiport fuel injection sys-
tem/sequential multiport fuel injection
system, ignition system
26. MET 7.5 A: Gauges and meters
27. IGN 10 A: SRS airbag system, multi-
port fuel injection system/sequential
multiport fuel injection system, engine
immobilizer system, cruise control sys-
tem
28. HEAD RH 15 A: Right−hand headlight
(high beam) 29. HEAD RL 15 A:
Right−hand headlight
(low beam)
30. EFI NO.2 10 A: Multiport fuel injection
system/s equential multiport fuel injec-
tion system, leak detection pump
31. DEF I/UP 5 A: No circuit
32. SPARE 5 A: Spare fuse
33. SPARE 15 A: Spare fuse
34. SPARE 30 A: Spare fuse
35. INVERTER 15 A: Power outlet No cir-
cuit(115 V)
36. FR P/SEAT LH 30 A: Power front driv-
ers seat
37. DR/LCK 25 A: Multiplex communication
system
38. OBD 7.5 A: On−board diagnosis sys-
tem
39. PWR OUTLET 15 A: Power outlets
40. CARGO LP 7.5 A: Cargo lamp
41. AM1 7.5 A: Shift lock system, starting
system
42. A/C 7.5 A: Air conditioning system
4

3. MIR 15 A: Outside rear view mirror
control, outside rear view mirror heat-
ers
44. FR P/SEAT RH 30 A: Power front pas-
senger seat

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2008 TUNDRA from Apr. ’08 Prod. (OM 34477U)
45. TI&TE 15 A: Power tilt and power tele-
scopic
46. S/ROOF 25 A: Electric moon roof
47. ECUIG NO.1 7.5 A: Anti−lock brake
system, vehicle stability control system,
multiplex communication system, intu-
itive parking assist system, power front
drivers seat, power tilt and power tele-
scopic, shift lock, tire pressure warning
system, accessory meter, trailer towing,
power outlet, electric moon roof
48. LHIG 7.5 A: Back−up lights, charging
system, g auge and meters, turn signal
lights, air conditioning system, seat
heaters, back window defogger
49. 4WD 20 A: Four−wheel drive control
system
50. WSH 20 A: Window washer
51. WIPER 30 A: Wiper and washer
52. ECUIG NO.2 7.5 A: Multiplex commu-
nication system
53. TAIL 15 A: Tail lights, trailer lights (tail
lights), parking lights, outside rear view
mirror lights
54. A/C IG 10 A: Air conditioning system
55. SEATHTR 20 A: Seat heaters 56. PANEL 7.5 A:
Instrument panel lights,
glove box light, ashtray, accessory me-
ter, audio system, rear view monitor,
navigation system, rear seat entertain-
ment system, gauges and meters, air
conditioning system
57. ACC 7.5 A: Accessory meter, audio
system, rear seat entertainment sys-
tem, rear view monitor, navigation sys-
tem, back −up lights, trailer lights
(back −up lights), multiplex communica-
tion system, power outlet, outside rear
view mirror
58. BK/UP LP 10 A: Back−up light, gauges
and meters
59. CIG 15 A: Cigarette lighter
Fuses (type B)
60. HTR 50 A: Air conditioning system
61. LHJ/B 150 A: “AM1”, “TAIL”, “PANEL”,
“ACC”, “CIG”, “LH −IG”, “4WD”,
“ECU −IG NO.1”, “BK/UP LP”,
“SEAT −HTR”, “A/C IG”, “ECU −IG
NO.2”, “WSH”, “WIPER”, “OBD”, “A/C”,
“TI&TE”, “FR P/SEAT RH”, “MIR”,
“DR/LCK”, “FR P/SEAT LH”, “CARGO
LP”, “PWR OUTLET”, “POWER NO.1”
fuses 62. ALT 180 A (3URFE engine with
towing package), 140 A (others):
“LH−J/B”, “HTR”, “SUB BATT”, “TOW
BRK”, “STOP”, “FOG”, “TOW TAIL”,
“DEICER” fuses
63. A/PUMP NO.1 50 A: Multiport fuel in-
jection system/sequential multiport fuel
injection system
64. A/PUMP NO.2 50 A: Multiport fuel in-
jection system/sequential multiport fuel
injection system
65. MAIN 40 A: “HEAD LL”, “HEAD RL”,
“HEAD LH”, “HEAD RH” fuses
Fuses (type C)
66. DEFOG 40 A: B
ack window defogger
67. SUB BATT 40 A: Trailer towing
68. ABS1 50 A: Anti−lock brake system,
vehicle stability control system
69. ABS2 40 A: Anti−lock brake system,
vehicle stability control system
70. ST 30 A: Starting system
71. POWER NO.1 30 A: Power windows,
power back window

607
2008 TUNDRA from Apr. ’08 Prod. (OM 34477U)
XS90006
Gross axle weight rating
Front GAWR Rear GAWR
Secure loose items to prevent weight
shifts that could affect the balance of your
vehicle. When the truck camper is loaded,
drive to a scale and weigh on the front
and on the rear wheels separately to de-
termine axle loads. Individual axle loads
should not exceed either of the Gross
Axle Weight Ratings (GAWR). The total of
the axle loads should not exceed the
Gross Vehicle Weight Rating (GVWR).
These ratings are given on the vehicle
certification label which is located on the
door latch post on the left side of the
vehicle. See “Your Toyota’s identification”
on page 455 in Section 2 for the Certifica-
tion Label location. If weight ratings are
exceeded, move or remove items to bring
all weights below the ratings.
XS90008
Gross vehicle weight rating
Not exceed GVWR
—Gross axle and vehicle
weight ratings