2002 TOYOTA PRIUS ECU

179
50p019a
8. Lower the vehicle completely andtighten the wheel nuts.
Turn the jack handle counterclockwise to
lower the vehicle.
Use only the wheel nut wrench to tighten
the nuts. Do not use other tools or any
additional leverage other than your hands,
such as a hammer, pipe or your foot.
Make sure the wrench is securely en-
gaged over the nut.
Tighten each nut a little at a time in the
order shown. Repeat the process until all
the nuts are tight.
CAUTION
When lowering the vehicle, make sure
all portions of your body and all oth-
er persons around will not be injured
as the vehicle is lowered to the
ground.
9. Check the air pressure of the re- placed tire.
Adjust the air pressure to the specification
designated on page 237 in Section 9. If
the pressure is lower than specified, drive
slowly to the nearest Toyota dealer and fill
to the correct pressure.
Do not forget to reinstall the tire inflation
valve cap as dirt and moisture could get
into the valve core and possibly cause air
leakage. If the cap is missing, have a new
one put on as soon as possible.
10. Restow all the tools, jack and flat tire securely.
As soon as possible after changing
wheels, tighten the wheel nuts to the
torque specified on page 237 in Section
9 with a torque wrench. Have a technician
repair the flat tire and replace the spare
tire with it.
CAUTION
Before driving, make sure all the
tools, jack and flat tire are securely
in place in their storage location to
reduce the possibility of personal in-
jury during a collision or s udden
braking.
—Lowering your vehicle —After changing wheels

182
CAUTION
Use extreme caution when towing
vehicles. Avoid sudden starts or er-
ratic driving maneuvers which
would place excessive stress on the
emergency towing eyelet and towing
cable or chain. The eyelet and tow-
ing cable or chain may break and
cause serious injury or damage.
In case of installing the front eyelet
on the vehicle, be sure to tighten
in the front eyelet securely. If the
tightening is loose, it may come off
when towing and result in death or
serious injury to the passenger in
the front vehicle or damage to that
vehicle.
NOTICE
Use only a cable or chain specifically
intended for use in towing vehicles.
Securely fasten the cable or chain to
the towing eyelet provided.
Before towing, release the parking brake
and put the selector lever in “N”. The key
must be in “ACC” (hybrid system off) or
“ON” (hybrid system on).
CAUTION
If the hybrid system is not running,
the power assist for the brakes and
steering will not work so steering and
braking will be much harder than usu-
al.
50p026b
If you cannot shift the selector lever
out of “P” position to other positions
even though the brake pedal is de-
pressed, use the shift lock override but-
ton as follows:1. Turn the ignition key to “LOCK” position. Make sure the parking
brake is applied.
2. Pry up the cover with a flatbladed screwdriver or equivalent.
If you cannot shift running
mode selector lever

195
If you are a skilled do−it−yourself
mechanic, the Toyota service manuals are
recommended. Please be aware that
do− it−yourself maintenance can affect your
warranty coverage. See ”Owner ’s Warranty
Information Booklet” or ”Owner ’s Manual
Supplement” for the details.
General maintenance
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
page 214 in Section 8 −2 for additional
information. Tire surface and wheel nuts
Check the tires carefully for cuts, damage
or excessive wear. See Section 8
−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 mainte-
nance schedule. (For scheduled mainte-
nance information, please refer to the
“Scheduled Maintenance Guide” or “Own-
er ’s Manual Supplement”.) See page 216
in Section 8− 2 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 and trunk operate
smoothly and all latches lock securely.
Make sure the engine hood secondary
latch secures the hood from opening when
the primary latch is released.

196
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
Be alert for changes in steering condition,
such as hard steering or strange noise.
Seats
Check that all front seat controls such as
seat adjusters, seatback recliner, etc. op-
erate smoothly and that all latches lock
securely in any position. Check that the
head restraint move up and down smooth-
ly and that the locks hold securely in any
latched position. For folding−down rear
seatbacks, check that the latches lock se-
curely. 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 pedal has the proper travel
and that, on a safe incline, your vehicle
is held securely with only the parking
brake applied.
Hybrid transaxle ”Park” mechanism
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 page 225 in Section 8
−3 for
additional information.
Coolant level
Make sure the coolant level is between
the ”FULL” and ”LOW” lines on the see −
through reservoir when the hybrid system
is cold. See page 210 in Section 8 −2 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 page 211 in
Section 8 −2 for additional information.

239
21. HTR 10 A: Air conditioning system
22. TAIL 7.5 A: Parking lights, tail lights,
license plate lights, side marker lights
23. ECUIG 5 A: Air conditioning system,
anti −lock brake system, electric power
steering, daytime running light system
24. STOP 15 A: Stop lights, high mounted
stoplights, anti −lock brake system
25. ACC 10 A: Anti−lock brake system
warning light, clock, audio system, mul-
ti −information display, shift lock system
26. WIPER 30 A: Windshield wiper
27. ECUB 7.5 A: Air conditioning system,
daytime running light system, electric
power steering system, hybrid vehicle
immobiliser system
28. CIG 15 A: Power outlet
29. WASHER 15 A: Washer
30. DOOR 30 A: Power door lock system
31. SRS ACC 10 A: SRS airbags, seat
belt pretensioners
32. OBD II 7.5 A: No circuit
33. PWR1 20 A: Power window system
34. AM1 5 A: “ACC”, “CIG”, “SRS ACC”,
“WASHER”, “HTR”, “WIPER”, “ECU −IG”
and “GAUGE” fuses
35. DC/DCS 5 A: Inverter and converter 36. HTR NO.3 50 A:
Air conditioning sys-
tem
37. EMPS 50 A: Electric power steering
38. ABS NO.1 40 A: Anti−lock brake sys-
tem
39. MF HEAD 30 A: Daytime running light
system
40. HTR 50 A: Air conditioning system
41. RDI 30 A: Electric cooling fan
42. ABS NO.2 30 A: Hydraulic brake
booster