2001 TOYOTA PRIUS change wheel

DI7OK±01
BR3583
BR3582F00010
RotorSpeed Sensor
Magnet
To ECU
+V
±VHigh Speed
Low Speed
CoilNS
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM WITH EBD & RBS
DI±371
2001 PRIUS (RM778U)
CIRCUIT INSPECTION
DTC
C0200/31 ± C0215/34Speed Sensor Circuit
CIRCUIT DESCRIPTION
The speed sensor detects wheel speed and sends the ap-
propriate signals to the ECU. These signals are used for control
of both the ABS & EBD control system. The front and rear rotors
each have 48 serrations.
When the rotors rotate, the magnetic field emitted by the perma-
nent magnet in the speed sensor generates an AC voltage.
Since the frequency of this AC voltage changes in direct propor-
tion to the speed of the rotor, the frequency is used by the ECU
to detect the speed of each wheel.

DTC No.DTC Detecting ConditionTrouble Area
C0200/31
C0205/32
C0210/33
C0215/34
Detection of any of conditions 1. through 4.:
1. At vehicle speed of 10 km/h (6 mph) or more, pulses are
not input for 15 sec. or more.
2. While a vehicle is driven at a speed of 15 km/h (24 mph)
or more, pulse signals from the speed sensor are
instantly omitted 7 times or more.
3. While a vehicle is driven at a speed of 20 km/h (32 mph)
or more, error signals from the speed sensor are trans-
mitted consecutively 75 time or more within 5 min.
4. When the ignition switch is ON, an open circuit in the
speed sensor continues for 0.5 sec. or more.

Right front, left front, right rear and left rear speed sensor

Each speed sensor circuit

Sensor rotor
HINT:
DTC No. C0200/31 is for the right front speed sensor.
DTC No. C0205/32 is for the left front speed sensor.
DTC No. C0210/33 is for the right rear speed sensor.
DTC No. C0215/34 is for the left rear speed sensor.

F12682
High Pressure
Switch
H5
H6 Hydraulic Brake Booster
W±B W±B W±B 5
A 1
IE GR
J1
J/C Y±R 4
49 B1011Brake ECU
PL PH
B13 H5
H6J7
J/C
A A PL PH
PLG PHG
Low Pressure
SwitchW±B
DI±430
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM WITH EBD & RBS
2001 PRIUS (RM778U)
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check accumulator operation.
PREPARATION:
(a) Turn the ignition switch OFF, and depress the brake pedal 40 times or more.
HINT:
When a pressure in power supply system is released, reaction force becomes heavy and stroke becomes
shorter.
(b) Install the LSPV gauge (SST) to rear wheel cylinder and bleed air.
SST 09709±29018
CHECK:
Depress the brake pedal with force of more than 343 N (35 kgf, 77 lbf) and turn the ignition switch ON, then
check the rear wheel cylinder pressure when an increase of pressure changes from acutely to mildly.
OK:
5,099 ± 8,924 kPa (52 ± 91 kgf/cm2, 740 ± 1,294 psi) at 20°C (68°F)
HINT:
If the value is not within the standard, cool the engine room and check it again.
NG Replace accumulator.
OK

F12410
LOCK ONPH
PHG
F12413
LOCKPHPHG
DI±432
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM WITH EBD & RBS
2001 PRIUS (RM778U)
3 Check pressure switch (PH) operation.
PREPARATION:
(a) Turn the ignition switch OFF, and depress the brake pedal
40 times or more.
HINT:
When a pressure in power supply system is released, reaction
force becomes heavy and stroke becomes shorter.
(b) Install the LSPV gauge (SST) to the rear wheel cylinder
and bleed air.
SST 09709±29018
CHECK:
While checking the voltage between terminals PH and PHG of
hydraulic brake booster, depress the brake pedal with force of
more than 343 N (35 kgf, 77 lbf) and turn the ignition switch ON,
then check the rear wheel cylinder pressure when voltage
changes from 6 V to 0 V.
OK:
12,553 ± 20,104 kpa (128 ± 205 kgf´cm2, 1,820 ± 2,916
psi)
CHECK:
While checking the resistance between terminals PH and PHG,
depress the brake pedal changing the force in the range of 197
N (20 kgf, 44 lbf) to 343 N (35 kgf, 77 lbf) and check the rear
wheel cylinder pressure when resistance changes from 0 kW to
1 kW between PH and PHG.
OK:
11,964 ± 18,240 kpa (122 ± 186 kgf´cm2, 1,735 ± 2,645
psi)
HINT:
After inspection, connect the connector, fill brake reservoir with
brake fluid and clear the DTC (See page DI±353).
OK Go to step 5.
NG

F12411
LOCKON
PLG PL
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM WITH EBD & RBS
DI±433
2001 PRIUS (RM778U)
4 Check for open circuit in harness and connector between pressure switch (PH)
and brake ECU (See page IN±41).
NG Repair or replace harness or connector.
OK
Replace hydraulic brake booster assembly.
5 Check pressure switch (PL) operation.
PREPARATION:
(a) Turn the motor switch OFF, and depress the brake pedal
40 times or more.
HINT:
When a pressure in power supply system is released, reaction
force becomes heavy and stroke becomes shorter.
(b) Install the LSPV gauge (SST) to the rear wheel cylinder
and bleed air.
SST 09709 ±29018
CHECK:
While checking the resistance between terminals PL and PLG
of hydraulic brake booster, depress the brake pedal with force
of more than 343 N (35 kgf, 77 lbf) and turn the ignition switch
ON, then check the rear wheel cylinder pressure when the re-
sistance changes from 5.7 kW to 1.0 kW.
OK:
9,022 ± 15,102 kpa (92 ± 154 kgf´cm2, 1,308 ± 2,190 psi)
CHECK:
While checking the resistance between terminals PL and PLG
of hydraulic brake booster, depress the brake pedal changing
the force in the range of 197 N (20 kgf, 44 lbf) to 343 N (35 kgf,
77 lbf) and check the rear wheel cylinder pressure when resis-
tance changes from 1.0 kW to 5.7 kW.
OK:
8,532 ± 13,337 kpa (87 ± 136 kgf´cm2, 1,237 ± 1,934 psi)
HINT:
After inspection, connect the connector, fill brake reservoir with
brake fluid and clear the DTC (See page DI±353).
NG Replace hydraulic brake booster assembly.
OK

DI7OT±01
I15528
M5
M6M7
DI±820
± DIAGNOSTICSNAVIGATION SYSTEM
2001 PRIUS (RM778U)
TERMINALS OF ECU
MULTI DISPLAY
SymbolsC ditiSTD V lt (V)
Problem symptom when
open circuit is detected.
Symbols
(Terminals NO. )ConditionSTD Voltage (V)Problem symptom when
short circuit is detected.
TX+ (M5±3)Ignition switch
ACC or ONAbout 2.5 V Screen is in disorder.
TX3+ (M5±4)Ignition switch
ACC or ONAbout 2.5 V Screen is in disorder.
SPD ± GND
(M5±5 ± M7±6)Ignition switch ON, and driving
wheel rotated slowlyRepeatedly changes from below 1
to 9 VFuel efficiency cannot be calcu-
lated.
TX± (M5±10)Ignition switch
ACC or ONAbout 2.5 V Screen is in disorder.
TX3± (M5±11)Ignition switch
ACC or ONAbout 2.5 V Screen is in disorder.
PKB ± GND
(M5±13 ± M7±6)Parking brake switch ON (parking
brake lever released)5 V The system cannot enter Diagno-
sis System mode.
TC ± GNDIgnition switch OFF and connectContinuityNavigation system is normal.TC ± GND
(M5±14 ± M7±6)
Ignition switch OFF and connect
thermals TC and E1 of diagnosis
check connector
Continuity
The system cannot exit Service
Check mode.
VR ± VG
(M6±1 ± M6±6)ConstantContinuityScreen noise or other types of
noise occur.
R ± VG
(M6±2 ± M6±6)Diagnosis display check screen is
white (Using an oscilloscope)0.7 V ± 0.1 V *2Screen color turns to blue.
B ± VG
(M6±3 ± M6±6)Diagnosis display check screen is
white (Using an oscilloscope)0.7 V ± 0.1 V *2Screen color turns to yellow.
TX1+ (M6±5)AVC±LAN
communication circuit±Navigation system does not oper-
ate.
VG ± GND
(M6±6 ± M7±6)
ConstantContinuityScreen noise or other types of
noise occur.
(M6±6 ± M7±6)
Navigation system does not op-
eration.
G ± VG
(M6±7 ± M6±6)Diagnosis display check screen is
white (Using an oscilloscope)0.7 V ± 0.1 V *2Screen color turns to red±purple.

I15499
N2
N3
DI±822
± DIAGNOSTICSNAVIGATION SYSTEM
2001 PRIUS (RM778U)
NAVIGATION ECU
SymbolsC ditiSTD V lt (V)
Problem symptom when
open circuit is detected.
Symbols
(Terminals NO. )ConditionSTD Voltage (V)Problem symptom when
short circuit is detected.
AUI+ ± GND
(N2±1 ± N2±17)Radio switch ON5 ± 7 VDriver's side speaker does not
sound.
AUO+ ± GND
(N2±2 ± N2±17)Radio switch ON5 ± 7 VDriver's side speaker does not
sound.
SPD ± GND
(N2±5 ± N2±17)Ignition switch ON and driving
wheel rotated slowlyRepeatedly changes from below 1
to 9 VNavigation operation is available
during, or a cursor on present site
does not move.
+B ± GND
(N2±9 ± N2±17)Constant10 ± 14 VThe set route can not be memo-
rized. (The route disappears by
turning the ignition switch OFF.)
Fuse is blown.
AUI± ± GND
(N2±10 ± N2±17)Radio switch ON5 ± 7 VDriver's side speaker does not
sound.
AUO± ± GND
(N2±11 ± N2±17)Radio switch ON5 ± 7 VDriver's side speaker does not
sound.
REV ± GND
(N2±14 ± N2±17)A/T shift position R5 VThe direction of advance of the ve-
hicle is different from that of the
cursor.
GND ± Body ground
(N2±17 ± Body ground)ConstantBelow 1 VAudio system is normal.
ACC ± GND
(N2±18 ± N2±17)Ignition switch ACC or ON10 ± 14 VAudio system does not sound.
VR ± VG
(N3±1 ± N3±6)
ConstantContinuityScreen noise or other types of
noise occur.
(N3±1 ± N3±6)
Navigation system does not op-
eration.
R ± VG
(N3±2 ± N3±6)Diagnosis display check screen is
white (Using an oscilloscope)0.7 V ± 0.1 V*1Screen color turns to blue.

SR1BN±01
F12267
F12268
Fulcrum LengthSST
F12269
± STEERINGELECTRIC POWER STEERING GEAR
SR±23
2001 PRIUS (RM778U)
REASSEMBLY
NOTICE:
When using a vise, do not overtighten it.
1. INSTALL EARTH WIRE
Install the earth wire with the bolt.
Torque: 5.5 N´m (60 kgf´cm, 52 in.´lbf)
2. INSTALL RH AND LH CLAW WASHERS AND RACK
ENDS
(a) Install a new claw washer and temporarily install the rack
end.
HINT:
Align the claws of the claw washer with the steering rack
grooves.
(b) Using a spanner, hold the steering rack steadily and using
SST, torque the rack end.
SST 09922 ± 10010
Torque: 62 N´m (630 kgf´cm, 46 ft´lbf)
NOTICE:
Use SST 09922 ± 10010 in the direction shown in the il-
lustration.
HINT:
Use a torque wrench with a fulcrum length of 380 mm (14.96
in.).
(c) Using a brass bar and a hammer, stake the claw washer.
NOTICE:
Avoid any impact on the steering rack.
(d) Employ the same manner described above to the other
side.
3. INSTALL RH AND LH RACK BOOTS, CLIPS AND
CLAMPS
(a) Ensure that the steering rack hole is not clogged with
grease.
HINT:
If the hole is clogged, the pressure inside the boot will change
after it is assembled and the steering wheel is turned.
(b) Install the boot, clip and clamp.
NOTICE:
Be careful not to damage or twist the boot.