2001 TOYOTA PRIUS Service Repair Manual

B04758
IN±20
± INTRODUCTIONFOR ALL OF VEHICLES
20 Author: Date:
2001 PRIUS (RM778U)
(6) If a damage to any of the high±voltage components
and cables is suspected, cut the high±voltage cir-
cuit using the procedure below:

Move the shift lever to the P position and en-
gage the parking brake.

Remove the ignition key. Then disconnect the
cable from the negative (±) terminal of the
auxiliary battery.

Wear insulated gloves, and then remove the
service plug.

If you cannot remove the service plug due to
damage to the rear portion of the vehicle, re-
move the HV fuse or IGCT relay instead.
(g) Precautions to be taken when disposing of the vehicle
When scrapping the vehicle, remove the HV battery from
the vehicle and return it through the route specified by the
manufacturer. The same applies to any damaged HV bat-
tery.
(h) Precautions to be observed when towing
Tow the damaged vehicle with its front wheels or its front
and rear wheels lifted off the ground.
NOTICE:
Towing the damaged vehicle with its front wheels on the
ground may cause the motor to generate electricity. This
electricity could, depending on the nature of the damage,
leak and cause a fire.
(i) Towing with 4 wheels on the ground
NOTICE:

If you have to tow the damaged vehicle using a rope,
do it at a speed below 30 km/h. Such towing operation
is allowed only to cover very short distance, such as
the distance to a tow truck lorry, for example.

Set the ignition switch to the ACC position and shift
lever to the N position.

If you detect any abnormality in the damaged vehicle
during the towing operation, stop the towing opera-
tion immediately.
(j) Towing eyelet
(1) Install the hook.
(2) Hook a rope onto the illustrated point for towing.

BO4111
Negative Cable
± INTRODUCTIONFOR ALL OF VEHICLES
IN±21
21 Author: Date:
2001 PRIUS (RM778U)
7. FOR VEHICLES EQUIPPED WITH SRS AIRBAG AND
SEAT BELT PRETENSIONER
(a) The PRIUS is equipped with an SRS (Supplemental Re-
straint System), such as the driver airbag, front passen-
ger airbag assembly, side airbag assembly and seat belt
pretensioner.
Failure to carry out service operations in the correct se-
quence could cause the supplemental restraint system to
unexpectedly deploy during servicing, possibly leading to
a serious accident.
Further, if a mistake is made in servicing the supplemental
restraint system, it is possible the SRS may fail to operate
when required. Before servicing (including removal or
installation of parts, inspection or replacement), be sure
to read the following items carefully, then follow the cor-
rect procedure described in this manual.
(b) GENERAL NOTICE
(1) Malfunction symptoms of the supplemental re-
straint system are difficult to confirm, so the diag-
nostic trouble codes become the most important
source of information when troubleshooting. When
troubleshooting the supplemental restraint system,
always inspect the diagnostic trouble codes before
disconnecting the battery (See page DI±497).
(2) Work must be started after 90 seconds from the
time the ignition switch is turned to the ºLOCKº posi-
tion and the negative (±) terminal cable is discon-
nected from the battery.
(The supplemental restraint system is equipped
with a back±up power source so that if work is
started within 90 seconds of disconnecting the neg-
ative (±) terminal cable from the battery, the SRS
may deploy.)
When the negative (±) terminal cable is discon-
nected from the battery, memory of the clock and
audio systems will be cancelled. So before starting
work, make a record of the contents memorized by
the each memory system. Then when work is fin-
ished, reset the clock and audio systems as before.
To avoid erasing the memory of each memory sys-
tem, never use a back±up power supply from anoth-
er battery.

F08459
Marks
IN±22
± INTRODUCTIONFOR ALL OF VEHICLES
22 Author: Date:
2001 PRIUS (RM778U)
(3) Even in cases of a minor collision where the SRS
does not deploy, the steering wheel pad, front pas-
senger airbag assembly, side airbag assembly and
seat belt pretensioner should be inspected (See
page RS±14, RS±28, RS±63 and BO±92).
(4) Never use SRS parts from another vehicle. When
replacing parts, replace them with new parts.
(5) Before repairs, remove the airbag sensor if shocks
are likely to be applied to the sensor during repairs.
(6) Never disassemble and repair the airbag sensor as-
sembly, steering wheel pad, front passenger airbag
assembly, side airbag assembly or seat belt preten-
sioner.
(7) If the airbag sensor assembly, steering wheel pad,
front passenger airbag assembly, side airbag as-
sembly or seat belt pretensioner has been dropped,
or if there are cracks, dents or other defects in the
case, bracket or connector, replace them with new
ones.
(8) Do not directly expose the airbag sensor assembly,
steering wheel pad, front passenger airbag assem-
bly or seat belt pretensioner to hot air or flames.
(9) Use a volt/ohmmeter with high impedance (10 kW/V
minimum) for troubleshooting of the electrical cir-
cuit.
(10) Information labels are attached to the periphery of
the SRS components. Follow the instructions on the
notices.
(11) After work on the supplemental restraint system is
completed, check the SRS warning light (See page
DI±497).
(c) SPIRAL CABLE (in Combination Switch)
The steering wheel must be fitted correctly to the steering
column with the spiral cable at the neutral position, other-
wise cable disconnection and other troubles may result.
Refer to SR±14 of this manual concerning correct steer-
ing wheel installation.

B04764
Example:
Correct Wrong
Z13950
Example:
± INTRODUCTIONFOR ALL OF VEHICLES
IN±23
23 Author: Date:
2001 PRIUS (RM778U)
(d) STEERING WHEEL PAD (with Airbag)
(1) When removing the steering wheel pad or handling
a new steering wheel pad, it should be placed with
the pad top surface facing up.
Storing the pad with its metallic surface facing up-
ward may lead to a serious accident if the airbag de-
ploys for some reason. In addition do not store a
steering wheel pad on top of another one.
(2) Never measure the resistance of the airbag squib.
(This may cause the airbag to deploy, which is very
dangerous.)
(3) Grease should not be applied to the steering wheel
pad and the pad should not be cleaned with deter-
gents of any kind.
(4) Store the steering wheel pad where the ambient
temperature remains below 93°C (200°F), without
high humidity and away from electrical noise.
(5) When using electric welding, first disconnect the air-
bag connector (yellow color and 2 pins) under the
steering column near the combination switch con-
nector before starting work.
(6) When disposing of a vehicle or the steering wheel
pad alone, the airbag should be deployed using an
SST before disposal (See page RS±16).
Carry out the operation in a safe place away from
electrical noise.