2005 TOYOTA TUNDRA ECU

’05 TUNDRA_U (L/O 0408)
427
2005 TUNDRA from Aug. ’04 Prod. (OM34427U)
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 Section 7 −2 for additional
information.
Tire surface and wheel nuts
Check the tires carefully for cuts,
damage or excessive wear. See Sec-
tion 7 −2 for additional information.
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 sched-
uled maintenance information, please
refer to the “Scheduled Maintenance
Guide” or “Owner ’s Manual Supple-
ment”.) See 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
Engine continually runs hot; oil pres-
sure gauge stays low
If you notice any of these clues, take your
vehicle to your Toyota dealer as soon as
possible. It probably needs adjustment or
repair.
CAUTION
Do not continue driving with the ve-
hicle unchecked. It could result in se-
rious vehicle damage and possibly
personal injury.
Does your vehicle need
repairing?

’05 TUNDRA_U (L/O 0408)
460
2005 TUNDRA from Aug. ’04 Prod. (OM34427U)
3. Install the rubber cover as shown,
and fit it securely on the boss. Then
plug in the connector.
Make sure the rubber cover fits securely
on the bulb base and the mounting body.
Aiming is not necessary after replacing
the bulb. When aiming adjustment is nec-
essary, contact your Toyota dealer. If either the left or right front fog lights
burns out, contact your Toyota dealer.
NOTICE
Do not try to replace the front fog
light bulbs by yourself. You may dam-
age the vehicle.
LEFT SIDE PARKING LIGHT—Loosen the
bolt and remove the engine coolant reser-
voir.
—Front fog lights
—Parking lights

’05 TUNDRA_U (L/O 0408)
480
2005 TUNDRA from Aug. ’04 Prod. (OM34427U)
22. ALT− S 7.5 A: Charging system
23. ETCS 10 A: Multiport fuel injection
system/s equential multiport fuel injec-
tion system, electronic throttle control
system
24. HAZ 15 A: Emergency flashers, turn
signal lights, towing converter
25. EFI NO.1 20 A: Multiport fuel injection
system/s equential multiport fuel injec-
tion system, fuel pump, “EFI NO.2”
fuse
26. AM2 30 A: Ignition system, starting
system, “IGN” and “STA” fuses
27. TOWING 30 A: Towing converter
28. WIP 20 A: Windshield wipers and
washer
29. TURN 5 A: Turn signal lights
30. ECU IG 5 A: Anti−lock brake system,
vehicle stability control system, multi-
plex communication system, tire pres-
sure warning system
31. 4WD 20 A: Four−wheel drive control
system, A.D.D. control system
32. ACC 15 A: Cigarette lighter, audio sys-
tem, power rear view mirrors, “PWR
OUTLET 1” and “PWR OUTLET 2”
fuses 33. GAUGE 10 A:
Gauges and meters,
back −up lights, starting system, air
conditioning system, auto anti −glare in-
side rear view mirror, outside rear view
mirror heaters
34. IGN 5 A: SRS airbag system, multiport
fuel injection system/sequential multi-
port fuel injection system, discharge
warning light, ignition system, vehicle
stability control system, front passenger
occupant classification system
35. CARGO LP 5 A: Cargo lamp
36. TAIL 15 A: Tail lights, turn signal
lights, license plate lights, instrument
panel lights, parking lights, glove box
light
37. OBD 7.5 A: On−board diagnosis sys-
tem
38. HORN 10 A: Horns
39. STA 5 A: Multiport fuel injection sys-
tem/sequential multiport fuel injection
system, g auges and meters
40. STOP 15 A: Stoplights, high mounted
stoplight, anti −lock brake system, ve-
hicle stability control system, towing
converter Fuses (type B)
41. AM1 40 A: Starting system, “ACC”,
“WIP”, “4WD”, “ECU −IG”, “GAUGE” and
“TURN” fuses
42. HTR 50 A: Air conditioning system,
“A/C” fuse
43. J/B 50 A: “POWER”, “CARGO LP”,
“TAIL”, “OBD”, “HORN” and “STOP”
fuses
44. ABS 2 50 A: Anti−lo
ck brake system,
v

ehicle stability control system
45. ABS 3 30 A: Anti−lock brake system,
vehicle stability control system
46. ST3 30 A: Starting system, “STA” fuse
47. POWER 30 A: Power door lock sys-
tem, power windows, power back win-
dow, power seat
Fuse (type C)
48. FL ALT 100 A (without towing pack- age) or 140 A (with towing package):
“AM1”, “HTR”, “J/B”, “MIR HTR”,
“FOG”, “TOW BRK”, “SUB BATT”,
“TOW TAIL”, “PWR OUTLET 1” and
“PWR OUTLET 2” fuses
49. A/PUMP 60 A: Multiport fuel injection
system/s equential multiport fuel injec-
tion system

’05 TUNDRA_U (L/O 0408)
482
2005 TUNDRA from Aug. ’04 Prod. (OM34427U)
Instrument panel
18. EFI NO.1 20 A: Multiport fuel injection
system/s equential multiport fuel injec-
tion system
19. H −LP RH 15 A (without daytime run-
ning light system): Right−hand head-
light
20. TOWING 30 A: Towing converter
21. ALT− S 7.5 A: Charging system
22. DRL 15 A (with daytime running light system): Daytime running light system
H −LP LH 15 A (without daytime run-
ning light system): Left −hand head-
light
23. AM2 25 A: Starting system 24. TURN
−HAZ 20 A: Turn signal lights,
emergency flashers, towing converter
25. RAD NO.3 30 A: Audio system/video
system
26. ST 30 A: Starting system, “STA” fuse
27. HORN 10 A: Horns
28. EFI NO.2 10 A: Multiport fuel injection
system/se quential multiport fuel injec-
tion system, leak detection pump
29. DOME 10 A: Center interior and per-
sonal lights, personal lights, gauges
and meters, clock, ignition switch light,
door courtesy lights, step light, vanity
lights
30. ECU −B 7.5 A: Multiplex communication
system, front passenger occupant clas-
sification system, driver and front pas-
senger door lock system, gauges and
meters, wireless door lock system
31. MIR HTR 15 A: Outside rear view mir-
ror heaters
32. RAD NO.1 20 A: Audio system, rear
seat entertainment system
33. TAIL 15 A: Tail lights, trailer lights (tail
lights), parking lights, multiport fuel in-
jection system/sequential multiport fuel
injection system, license plate lights 34. ECU
−IG 10 A: Charging system, stop
lights, anti −lock brake system, vehicle
stability control system, traction control
system, electric moon roof, driver and
front passenger door lock system,
gauges and meters, multi −information
display, power outlets, multiplex com-
munication system, tire pressure warn-
ing system, auto anti− glare inside rear
view mirror
35. WSH 25 A: Wipers and washer
36. AC INV 15 A: Power outlets
37. IGN 2 20 A: Starting system, multiport
fuel injection system/sequential multi-
port fuel injection system
38. PWR NO.3 20 A: Rear passenger’s
power window (right side)
39. PWR NO.4 20 A: R
e
ar passenger’s
power window (left side)
40. CIG 15 A: Cigarette lighter
41. RAD NO.2 7.5 A: Audio system/video
system, rear seat audio system, rear
seat entertainment system, multiplex
communication system, clock, shift
position indicator lights
42. 4WD 20 A: A.D.D. control system,
four −wheel drive system

’05 TUNDRA_U (L/O 0408)
483
2005 TUNDRA from Aug. ’04 Prod. (OM34427U)
43. STOP 15 A: Stop lights, high− mounted
stop lights, multiport fuel injection sys-
tem/sequential multiport fuel injection
system, anti −lock brake system, vehicle
stability control system, traction control
system, trailer light (stop lights), trailer
brake controller, towing converter, mul-
tiplex communication system
44. OBD 7.5 A: On−board diagnosis sys-
tem
45. PANEL 7.5 A: Instrument panel lights,
glove box light, lights of seat heaters,
cigarette lighter, ashtrays, multi −infor-
mation display, audio system/video sys-
tem, gauges and meters, air condition-
ing systems, power outlets
46. PWR NO.1 25 A: Driver ’s door lock
system, driver’s power wi ndow
47. WIP 25 A: Wiper and washers
48. IGN 1 10 A: Charging system, SRS
airbag system, multiport fuel injection
system/s equential multiport fuel injec-
tion system, vehicle stability control
system, g auges and meters, air condi-
tioning system, front passenger occu-
pant classification system
49. SUN ROOF 25 A: Electric moon roof50. PWR NO.2 25 A:
Front passengers’
door lock system, front passenger ’s
power window
51. HTR 10 A: Air conditioning systems,
electric cooling fan, back window de-
fogger, seat heaters
52. FOG 15 A: Front fog lights
53. GAUGE 15 A: Back−up lights, gauge
and meters, emergency flashers, slip
indicator light, vehicle stability control
system, four −wheel drive system, trailer
lights (back −up lights), multiport fuel
injection system/sequential multiport
fuel injection system, shift position indi-
cator lights
54. PWR OUTLET 15 A: Power outlets
55. SEAT HTR 15 A: Seat heaters
Fuses (type B)
56. MAIN 40 A: “H−LP RH”, “H −LP LH”
“H −LP LL” and “H −LP RL” fuses
57. DOOR NO.2 30 A: Multiplex commu-
nication system (power door lock sys-
tem, security system)
58. PWR SEAT 30 A: Power front seats59. AM1 40 A:
“HTR”, “CIG”, “GAUGE”,
“RAD NO.2”, “ECU −IG”, “WIP”, “WSH”,
“IGN 1”, “IGN 2” and “4WD” fuses
60. PWR NO.5 30 A: Power back window
Fuses (type D)
61. ABS NO.2 30 A: Anti−lock brake sys-
tem, vehicle stability control system
62. DEFOG 40 A: Back window defogger
63. HEATER 50 A: Air conditioning system
6 4

. TOWING R/B 60 A: “TOWING TAIL”,
“BATT CHARGE” and “TOWING BRK”
fuses
65. ALT 140 A: “DEFOG”, “ABS NO.2”,
“CARGO LP”, “HEATER”, “AM1”, “PWR
SEAT”, “TAIL”, “STOP”, “SUN ROOF”,
“PANEL”, “OBD”, “FOG”, “PWR NO.1”,
“PWR NO.2”, “PWR NO.5”, “AC INV”,
“PWR NO.3”, “PWR NO.4”, “PWR
OUTLET” and “SEAT HTR” fuses
66. ABS NO.1 40 A: Anti−lock brake sys-
tem, vehicle stability control system
67. A/PUMP 50 A: Multiport fuel injection
system/s equential multiport fuel injec-
tion system
68. R/B 30 A: “A/F” fuse

’05 TUNDRA_U (L/O 0408)
489
2005 TUNDRA from Aug. ’04 Prod. (OM34427U)
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”
in Section 2 for the Certification Label
location. If weight ratings are exceeded,
move or remove items to bring all weights
below the ratings.
Gross vehicle weight rating
Not exceed GVWR
GAWRFront 1588 kg (3500 lb.)
Rear
Standard and access cab modelsV6 1615 kg (3560 lb.)
V8
Standard bed 1656 kg (3650 lb.)
StepSide bed
1615 kg (3560 lb.)
Double cab models 1706 kg (3760 lb.) GVWR
Tw o −wheel drive models
Standard cab models V6 2494 kg (5500 lb.)
V8 2858 kg (6300 lb.)
Access cab models V6 2585 kg (5700 lb.)
V8
Standard bed 2858 kg (6300 lb.)
StepSide bed
2726 kg (6010 lb.)
Double cab models 2993 kg (6600 lb.)
Four −wheel drive models
Standard cab models 2858 kg (6300 lb.)
Access cab models Standard bed 2858 kg (6300 lb.)
StepSide bed 2726 kg (6010 lb.)
Double cab models 2993 kg (6600 lb.)
If weight ratings are exceeded, move or
remove items to bring all weights below
the ratings.
—Gross axle and vehicle
weight ratings