2002 TOYOTA 4RUNNER ECU

’02 4Runner_U (L/O 0108)
2392002 MY 4RUNNER_U (OM 35787U)
NOTICE
Only use specified towing hook;
otherwise your vehicle may be dam-
aged.
A driver must be in the vehicle to steer
it and operate the brakes.
Towing in this manner may be done only
on hardsurfaced roads for a short dis-
tance and at low speeds. Also, the
wheels, axles, drive train, steering and
brakes must all be in good condition.
CAUTION
Use extreme caution when towing ve-
hicles. Avoid sudden starts or erratic
driving maneuvers which would place
excessive stress on the emergency
towing hook and towing cable or
chain. The hook and towing cable or
chain may break and cause serious
injury or damage.
NOTICE
Use only a cable or chain specifically
intended for use in towing vehicles.
Securely fasten the cable or chain to
the towing hook provided.
Before towing, release the parking brake
and put the transmission in “N” and the
transfer in “H” mode (high speed position,
twowheel drive). The key must be in
“ACC” (engine off) or “ON” (engine run-
ning).
CAUTION
If the engine is not running, the pow-
er assist for the brakes and steering
will not work so steering and braking
will be much harder than usual.
Towing hook
cover
Clip
Removing clip
Installing clip
—Removing towing hook cover
for emergency towing
(fourwheel drive models)

’02 4Runner_U (L/O 0108)
2532002 MY 4RUNNER_U (OM 35787U)
If you are a skilled doityourself mechan-
ic, the Toyota service manuals are recom-
mended. Please be aware that doityour-
self maintenance can affect your warranty
coverage. See “Owner ’s Warranty Informa-
tion Booklet” or “Owner ’s Manual Supple-
ment” for the details. Listed below are the general maintenance
items that should be performed as fre-
quently as specified. In addition to check-
ing the items listed, if you notice any
unusual noise, smell or vibration, you
should investigate the cause or take your
vehicle to your Toyota dealer or a quali-
fied service shop immediately. It is recom-
mended that any problem you notice be
brought to the attention of your dealer or
the qualified service shop for their advice.
CAUTION
Make these checks only where ade-
quate ventilation can be obtained if
you run the engine.
OUTSIDE THE VEHICLE
Items listed below should be performed
from time to time, unless otherwise
specified.
Tire pressure
Check the pressure with a gauge every
two weeks, or at least once a month. See
Section 72 for additional information.Tire surface and wheel nuts
Check the tires carefully for cuts, damage
or excessive wear. See Section 72 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 mainte-
nance schedule. (For scheduled mainte-
nance information, please refer to the sep-
arate “Scheduled Maintenance Guide” or
“Owner ’s Manual Supplement”.). See Sec-
tion 72 for additional information.
Fluid leaks
Check underneath for leaking fuel, oil, wa-
ter or other fluid after the vehicle has
been parked for a while. If you smell fuel
fumes or notice any leak, have the cause
found and corrected immediately.
Doors and engine hood
Check that all doors including back door
operate smoothly and all latches lock se-
curely. Make sure the engine hood sec-
ondary latch secures the hood from open-
ing when the primary latch is released.
General maintenance

’02 4Runner_U (L/O 0108)
2542002 MY 4RUNNER_U (OM 35787U)
INSIDE THE VEHICLE
Items listed below should be checked
regularly, e.g. while performing periodic
services, cleaning the vehicle, etc.
Lights
Make sure the headlights, stop lights, tail
lights, turn signal lights, and other lights
are all working. Check headlight aim.
Service reminder indicators and warning
buzzers
Check that all service reminder indicators
and warning buzzers function properly.
Steering wheel
Check that it has the specified free play.
Be alert for changes in steering condition,
such as hard steering or strange noise.
Seats
Check that all seat controls such as seat
adjusters, seatback recliner, etc. operate
smoothly and that all latches lock securely
in any position. Check that the head re-
straint move up and down smoothly and
that the locks hold securely in any latched
position. For foldingdown rear seatbacks
and swingup rear seat cushions, check
that the latches lock securely. Seat belts
Check that the seat belt system such as
buckles, retractors and anchors operate
properly and smoothly. Make sure the belt
webbing is not cut, frayed, worn or dam-
aged.
Accelerator pedal
Check the pedal for smooth operation and
uneven pedal effort or catching.
Brake pedal
Check the pedal for smooth operation and
that the pedal has the proper clearance.
Check the brake booster function.
Brakes
At a safe place, check that the brakes do
not pull to one side when applied.
Parking brake
Check that the lever has the proper travel
and that, on a safe incline, your vehicle
is held securely with only the parking
brake applied.
Automatic transmission “Park” mecha-
nism
Check the lock release button of the se-
lector lever for proper and smooth opera-
tion. On a safe incline, check that your
vehicle is held securely with the selector
lever in “P” position and all brakes re-
leased.
IN THE ENGINE COMPARTMENT
Items listed below should be checked
from time to time, e.g. each time when
refueling.
Washer fluid
Make sure there is sufficient fluid in the
tank. See Section 73 for additional in-
formation.
Engine coolant level
Make sure the coolant level is between
the “F” and “L” lines on the seethrough
reservoir when the engine is cold. See
Section 72 for additional information.
Radiator, condenser and hoses
Check that the front of the radiator and
condenser are clean and not blocked with
leaves, dirt, or insects. See Section 72
for additional information.

’02 4Runner_U (L/O 0108)
2932002 MY 4RUNNER_U (OM 35787U)
Engine compartment
(with daytime running light system)
5. DOME 15 A: Interior lights, personal
lights, luggage compartment light,
clock, car audio system, gauges and
meters, ignition switch light, vanity mir-
ror light, daytime running light
6. OBD 7.5 A: Onboard diagnosis sys-
tem
7. EFI 20 A: Multiport fuel injection sys-
tem/sequential multiport fuel injection
system
8. HEAD(RH) 10 A: Righthand headlight,
gauges and meters
9. HEAD(LH) 10 A: Lefthand headlight
Instrument panel
10. TAIL 10 A: Tail lights, license plate
lights, instrument panel lights
11. A.C 10 A: Air conditioning system
12. MIR HTR 10 A: Outside rear view mir-
ror heaters
13. DEFOG 15 A: Back window defogger
14. ETCS 15 A: Multiport fuel injection
system/s equential multiport fuel injec-
tion system
15. DRL 7.5 A: Daytime running light sys-
tem
16. HEAD (HI RH) 10 A: Righthand head- light (high beam), gauges and meters 17. HEAD (HI LH) 10 A: Lefthand head-
light (high beam)
18. HEAD (LO RH) 10 A: Righthand
headlight (low beam)
19. HEAD (LO LH) 10 A: Lefthand head-
light (low beam)
20. TOWING 25 A: Trailer lights (backup
lights, rear turn signal lights, stop/tail
lights)
21. SEAT HTR 20 A: Seat heater
22. FOG 15 A: Front fog lights
23. ECUIG 10 A: Cruise control system,
antilock brake system, vehicle skid
control system, SRS airbag system,
electronically controlled automatic
transmission system, power antenna,
power window, electric moon roof, pow-
er back window, back window defogger,
back window wiper
24. TURN 10 A: Turn signals lights, emer-
gency flashers
25. WIPER 25 A: Windshield wipers and
washer, power door lock control sys-
tem, back window defogger, horns,
theft deterrent system
26. 4WD 20 A: A.D.D. control system,
fourwheel drive control system, center
differential lock system

’02 4Runner_U (L/O 0108)
2942002 MY 4RUNNER_U (OM 35787U)
27. ACC 15 A: Car audio system, power
antenna, clock, power rear view mirror
control, cigarette lighter, seat belt pre-
tensioners, electronically controlled au-
tomatic transmission system, power
outlets, theft deterrent system
28. GAUGE 10 A: Gauges and meters,
back window defogger, daytime running
light system, air conditioning system,
cruise control system, center differen-
tial lock system, electronically con-
trolled automatic transmission, backup
lights
29. IGN 10 A: SRS airbag system, seat
belt pretensioners, multiport fuel injec-
tion system/sequential multiport fuel in-
jection system, discharge warning light,
vehicle skid control system
30. ECUB 7.5 A: Gauges and meters, air
conditioning system
31. HORN,HAZ 15 A: Horns, emergency
flashers
32. STA 7.5 A: Starting system
33. STOP 10 A: Stop lights, highmounted
stoplight Fuses (type B)
34. HEATER 50 A: Air conditioning system,
all components in “A.C” fuse
35. AM1 40 A: Starting system, all compo-
nents in “ACC”, “GAUGE”, “TURN”,
“ECUIG”, “WIPER” and “4WD” fuses
36. J/B 50 A: All components in “POWER”,
“HORN,HAZ”, “STOP” and “ECUB”
fuses
37. AM2 30 A: Starting system, multiport
fuel injection system/sequential multi-
port fuel injection system, all compo-
nents in “STA” and “IGN” fuses
38. ABS2 40 A: Antilock brake system,
active traction control system, vehicle
skid control system
39. POWER 30 A: Power window, power
back window, electric moon roof, power
seat, back door lock
Fuses (type C)
40. ABS 60 A: Antilock brake system
41. ALT 120 A: Charging system, all com-
ponents in “AM1”, “HEATER”, “TAIL”,
“RR HTR”, “ALTS”, “DEFOG”, “MIR
HTR” and “ACC” fuses