2001 PRIUS (EWD414U)
SRS
NOTICE: When inspecting or repairing the SRS, perform the operation in accordance with the following precautionary
instructions and the procedure and precautions in the Repair Manual for the applicable model year.
Malfunction symptoms of the SRS are difficult to confirm, so the DTCs become the most important source of information
when troubleshooting. When troubleshooting the SRS, always inspect the DTCs before disconnecting the battery.
Work must be started after 90 seconds from when the ignition switch is turned to the ºLOCKº position and the
negative (±) terminal cable is disconnected from the battery.
(The SRS is equipped with a back±up power source so that if work is started within 90 seconds from
disconnecting the negative (±) terminal cable of the battery, the SRS may be deployed.)
When the negative (±) terminal cable is disconnected from the battery, the memory of the clock and audio system will be
canceled. So before starting work, make a record of the contents memorized in the audio memory system. When work is
finished, reset the audio systems as they were before and adjust the clock. To avoid erasing the memory in each
memory system, never use a back±up power supply from outside the vehicle.
Before repairs, remove the airbag sensor if shocks are likely to be applied to the sensor during repairs.
Do not expose the steering wheel pad, front passenger airbag assembly, side airbag assembly, seat belt pretensioner,
airbag sensor assembly or side airbag sensor directly to hot air or flames.
Even in cases of a minor collision where the SRS does not deploy, the steering wheel pad, front passenger airbag
assembly, side airbag assembly, seat belt pretensioner, airbag sensor assembly and side airbag sensor assembly
should be inspected.
Never use SRS parts from another vehicle. When replacing parts, replace them with new parts.
Never disassemble and repair the steering wheel pad, front passenger airbag assembly, side airbag assembly, seat belt
pretensioner, airbag sensor assembly or side airbag sensor assembly in order to reuse it.
If the steering wheel pad, front passenger airbag assembly, side airbag assembly, seat belt pretensioner, airbag sensor
assembly or side airbag sensor assembly has been dropped, or if there are cracks, dents or other defects in the case,
bracket or connector, replace them with new ones.
Use a volt/ohmmeter with high impedance (10 kW/V minimum) for troubleshooting the system's electrical circuits.
Information labels are attached to the periphery of the SRS components. Follow the instructions on the notices.
After work on the SRS is completed, perform the SRS warning light check.
If the vehicle is equipped with a mobile communication system, refer to the precaution in the IN section of the Repair
Manual.
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.
A11252Matchmarks
A10471
EM±6
± ENGINE MECHANICALVALVE CLEARANCE
1122 Author: Date:
2001 PRIUS (RM778U)
4. ADJUST VALVE CLEARANCE
(a) Set the No.1 cylinder to the TDC/compression (See pro-
cedure in step 2).
(b) Place matchmarks on the timing chain and camshaft tim-
ing sprockets.
(c) Remove the 2 plug from the timing chain cover.
(d) Using drivers or equipment, while rotating the stopper
plate of the tensioner downward, turn the exhaust cam-
shaft right a little and push in the plunger of the chain ten-
sioner as shown in the illustration.
HINT:
When the stopper plate cannot be lowered easily, rotate the ex-
haust camshaft right and left a little.
(e) Insert a bar of ù 2 ± 3 mm (0.08 ± 0.12 in.) into the holes
in the stopper plate and tensioner to fix the stopper plate.
HINT:
At this time, it is easier to fix by installing the bar while ro-
tate the camshaft right and left a little.
Fix the bar with tape so that the bar does not come off.
(f) Remove the timing chain from the camshaft timing
sprocket.
NOTICE:
Never rotate the crankshaft with the timing chain re-
moved.
When rotating the camshaft with the timing chain re-
moved, rotate the crankshaft counterclockwise 40°
from the TDC and align the oil jet hole with the paint
mark before rotating it.
When installing the timing chain, make sure to return
it to the position of the matchmarks for camshaft and
then rotate the crankshaft clockwise to return.
HINT:
When the chain cannot be removed easily, rotate the intake
camshaft right and left a little.
(g) Hold the hexagonal portion of the camshaft with a
wrench, and remove the bolt and valve timing controller
assembly with the chain.
NOTICE:
Do not disassembled the valve timing controller assembly.
(h) Remove the intake and exhaust camshaft assembly.
HINT:
When disconnect the timing chain from the camshaft timing
sprocket, holding the timing chain.
SF1KT±01
B11465
B1146615° (3)
(2)
B11467Turn
± SFITHROTTLE BODY
SF±29
2001 PRIUS (RM778U)
REPLACEMENT
NOTICE:
To prevent deterioration, do not shock the throttle
position sensor.
Mixing of the foreign objects may cause the gear lock-
ing, so thoroughly check that there is no stuck of any
foreign objects and clean up if any.
REPLACE THROTTLE POSITION SENSOR
(a) Remove the 2 set screws and throttle position sensor.
(b) Reinstall the throttle position sensor.
(1) Check that the throttle valve is under the condition
of the opener opening angle (about 3.5°).
(2) Install the sensor to the place where is at 15° ro-
tated to the right from the specified installation posi-
tion.
(3) Gradually turn sensor counterclockwise until it
touches the throttle valve shaft and temporarily
torque the 2 set screws.
(c) Adjust the throttle position sensor.
(1) Connect the throttle position sensor connector.
NOTICE:
At this time, do not connect the throttle control motor con-
nector.
(2) Connect the TOYOTA hand±held tester to the
DLC3.
(3) Turn the ignition switch ON.
NOTICE:
After turning the ignition switch ON, do not depress the ac-
celerator pedal.
(4) While reading the value of the throttle valve opening
percentage (THROTTLE POS) of the CURRENT
DATA, turn the throttle position sensor slowly to left
and set the sensor at the center value of the stan-
dard value, and then torque the screws.
Torque: 1.7 N´m (17.5 kgf´cm, 15 in.´lbf)
Standard throttle valve opening percentage:
14.8 ± 0.8 %
F12233
F12234
F12236
F12224
± STEERINGTILT STEERING COLUMN
SR±13
2001 PRIUS (RM778U)
(c) Install the No. 1 tilt steering support reinforce with the No.
2 tilt lever lock bolt by turning it counterclockwise.
Torque: 5.4 N´m (55 kgf´cm, 48 in.´lbf)
HINT:
Align the No. 1 support reinforce with the nut to eliminate loose-
ness by turning the No. 1 support reinforce counterclockwise a
little, then torque the No. 2 tilt lever lock bolt.
5. INSTALL TORSION SPRING
6. INSTALL 2 ENERGY ABSORBING PLATES
(a) Install the 2 break away capsules, 2 energy absorbing
guides and 2 energy absorbing plates.
(b) Install the 2 new energy absorbing clips.
7. INSTALL TILT STEERING SUPPORT
(a) Install the 2 No. 1 tilt steering support collars.
(b) Install the tilt steering support, steering pawl set bolt,
washer.
(c) Install the lock nut.
Torque: 9.5 N´m (100 kgf´cm, 87 in.´lbf)
8. INSTALL COLUMN UPPER BRACKET AND COLUMN
UPPER CLAMP
(a) Install the column upper bracket and column upper clamp
with 2 new tapered±head bolts.
(b) Tighten the 2 tapered±head bolts until the bolt heads
break off.
F12830
F08459
Marks
± STEERINGTILT STEERING COLUMN
SR±15
2001 PRIUS (RM778U)
11. CONNECT TRANSMISSION CONTROL CABLE
12. INSTALL SPIRAL CABLE (See page BE±19)
13. INSTALL COMBINATION SWITCH WITH SPIRAL
CABLE
(a) Install the combination switch with spiral cable with the 3
screws.
(b) Connect the airbag connector.
(c) Connect the connectors.
14. INSTALL UPPER AND LOWER COLUMN COVERS
(a) Install the upper column cover with the screw.
(b) Install the lower column cover with the 3 screws.
15. INSTALL LOWER INSTRUMENT FINISH PANEL
(a) Connect the connectors and DLC3 and install the lower
instrument finish panel.
(b) Install the screw and bolt.
(c) Connect the hood lock release lever with the 2 screws.
16. CENTER SPIRAL CABLE
(a) Check that the front wheels are facing straight ahead.
(b) Turn the cable counterclockwise by hand until it becomes
harder to turn.
(c) Then rotate the cable clockwise about 2.5 turns to align
the marks.
HINT:
The cable will rotate about 2.5 turns to either left or right of the
center.
17. INSTALL STEERING WHEEL
(a) Align the matchmarks on the steering wheel and main
shaft assembly.
(b) Install the steering wheel set nut.
Torque: 50 N´m (510 kgf´cm, 37 ft´lbf)
18. INSTALL STEERING WHEEL PAD
NOTICE:
Never use airbag parts from another vehicle. When
replacing parts, replace with new ones.
Make sure the wheel pad is installed with the speci-
fied torque.
If the wheel pad has been dropped, or there are
cracks, dents or other defects in the case or connec-
tor, replace the wheel pad with a new one.
When installing the wheel pad, take care that the wir-
ings do not interfere with other parts and that they are
not pinched between other parts.
(a) Connect the connector.
(b) Connect the airbag connector.
RS0JO±06
± SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
RS±1
1600 Author: Date:
2001 PRIUS (RM778U)
SRS AIRBAG
PRECAUTION
CAUTION:
The PRIUS is equipped with SRS, which comprises a driver airbag, front passenger airbag and
side airbag. Failure to carry out service operations in the correct sequence could cause the SRS
to unexpectedly deploy during servicing, possibly leading to a serious accident. Further, if a
mistake is made in servicing the SRS, it is possible that the SRS may fail to operate when re-
quired. Before performing servicing (including removal or installation of parts, inspection or
replacement), be sure to read the following items carefully, then follow the correct procedures
described in the repair manual.
Work must be started 90 seconds after the ignition switch is turned to the ºLOCKº position and
the negative (±) terminal cable is disconnected from the battery.
(The SRS is equipped with a back±up power source so that if work is started within 90 seconds
from disconnecting the negative (±) terminal cable of the battery, the SRS may be deployed.)
Do not expose the steering wheel pad, front passenger airbag assembly, side airbag assembly,
airbag sensor assembly, front airbag sensor or side airbag sensor assembly directly to hot air
or flames.
NOTICE:
Malfunction symptoms of the SRS are difficult to confirm, so the DTCs become the most impor-
tant source of information when troubleshooting. When troubleshooting the SRS, always in-
spect the DTCs before disconnecting the battery.
Even in cases of a minor collision where the SRS does not deploy, the steering wheel pad, front
passenger airbag assembly, side airbag assembly, airbag sensor assembly, front airbag sen-
sor and side airbag sensor assembly should be inspected.
(See page RS±14, RS±28, RS±41, RS±53, RS±58 and RS±63)
Before repairs, remove the airbag sensor if shocks are likely to be applied to the sensor during
repairs.
Never use SRS parts from another vehicle. When replacing parts, replace them with new parts.
Never disassemble and repair the steering wheel pad, front passenger airbag assembly, side
airbag assembly, airbag sensor assembly, front airbag sensor or side airbag sensor assembly
in order to reuse it.
If the steering wheel pad, front passenger airbag assembly, side airbag assembly, airbag sen-
sor assembly, front airbag sensor or side airbag sensor assembly has been dropped, or if there
are cracks, dents or other defects in the case, bracket or connector, replace it with new one.
Use a volt/ohmmeter with high impedance (10 kW/V minimum) for troubleshooting the system's
electrical circuits.
Information labels are attached to the periphery of the SRS components. Follow the instruc-
tions on the notices.
After work on the SRS is completed, perform the SRS warning light check (See page DI±497).
When the negative (±) terminal cable is disconnected from the battery, the memory of the clock
and audio system will be canceled. So before starting work, make a record of the contents mem-
orized in the audio memory system. When work is finished, reset the audio systems as they
were before and adjust the clock. To avoid erasing the memory in each memory system, never
use a back± up power supply from outside the vehicle.
If the vehicle is equipped with a mobile communication system, refer to the precaution in the
IN section.
BE±10
± BODY ELECTRICALTROUBLESHOOTING
1677 Author: Date:
2001 PRIUS (RM778U) Even when the system is not set
(Headlights stay on).
Headlight control relay circuitDI±697
Even when the system is not set
(Taillights stay on).Taillight control relay circuitDI±691
WIRELESS DOOR LOCK CONTROL SYSTEM
This system uses the multiplex communication system, so check diagnosis system of the multiplex commu-
nication system before you proceed with troubleshooting.
HINT:
Troubleshooting of the wireless door lock control system is based on the premise that the door lock
control system is operating normally. Accordingly, before troubleshooting the wireless door lock control
system, first make certain that the door lock control system is operating normally.
If the trouble still reappears even though there are no abnormalities in any of the other circuits, then
check and replace the Wireless Door Lock Control Receiver as the last step.
SymptomSuspect AreaSee page
All functions of wireless door lock control system do not operate.
1. Transmitter
2. Wireless Door Lock Control Receiver
3. Wire Harness
4. Body ECUBE±83
BE±83
±
DI±678
POWER MIRROR CONTROL SYSTEM
SymptomSuspect AreaSee page
Both right and left mirrors do not operate.
1. ACC Fuse
2. ACC Relay
3. Mirror Switch
4. Wire HarnessBE±12
BE±12
BE±93
±
Only one side of mirror does not operate.1. Mirror Motor
2. Wire HarnessBE±93
±
AUDIO SYSTEM
SymptomSuspect AreaSee page
Audio system abnormal operation.TROUBLESHOOTINGBE±97
CLOCK SYSTEM
SymptomSuspect AreaSee page
Clock will not operate.TROUBLESHOOTING NO.1BE±102
Clock loses or gains time.TROUBLESHOOTING NO.2BE±102
HYBRID BEHICLE IMMOBILIZER SYSTEM
SymptomSuspect AreaSee page
Hybrid vehicle immobilizer system does not operate.Pre±checkBE±111