O2 sensor TOYOTA PRIUS 2001 Service Repair Manual

B11454
39.2 (400, 29)39.2 (400, 29)
VSV for Purge Flow
Switching Valve
Vapor Pressure
Sensor
Charcoal
Canister
Fuel Tank
Canister Closed
Valve
Fresh Air ValveTrap Filter
N´m (kgf´cm, ft´lbf) : Specified torque SF±18
± SFIFUEL TANK AND LINE
2001 PRIUS (RM778U)

SF1KS±01
F12396
TOYOTA Hand±Held
Tester
DLC3
B11458
Ohmmeter1 (M±)
2 (M+)
SF±24
± SFITHROTTLE BODY
1238 Author: Date:
2001 PRIUS (RM778U)
THROTTLE BODY
ON±VEHICLE INSPECTION
1. INSPECT SYSTEM OPERATION
(a) Disconnect the throttle control motor connector.
(b) Turn the ignition switch ON.
(c) Inspect the throttle position sensor function.
(1) Connect the TOYOTA hand±held tester to the
DLC3.
(2) When turning the throttle linkage to the full open
position, check that the throttle valve opening per-
centage (THROTTLE POS) of the CURRENT DATA
shows the standard value.
Throttle valve opening percentage: 60 % or more
If operation is not as specified, check that the throttle position
sensor, wiring and ECM.
(d) Connect the throttle control motor connector.
(e) Transit to the inspection mode and start the engine.
(f) Allow the engine to warm up to normal operating tempera-
ture.
(g) To check the charging rate of the HV battery, move the
shift lever to D range and check that the engine stops.
If it does not stop, the charging rate may be low. With the shift
lever in P range, keep running the engine for a while. Then, shift
lever to D range again and check that the engine stops.
(h) Start the engine.
(i) Turn the A/C switch ON and OFF, and check the idle
speed.
Idle speed (Transmission in neutral):
1,000 ± 50 rpm (A/C OFF)
1,200 ± 50 rpm (A/C ON)
NOTICE:
Perform inspection under condition without electrical load.
(j) Stop the engine and disconnect TOYOTA hand±held tes-
ter from the DLC3.
2. INSPECT THROTTLE CONTROL MOTOR
(a) Disconnect the throttle control motor connector.
(b) Using an ohmmeter, measure the resistance between ter-
minal M+ and M±.
Resistance: 0.3 ± 100 W at 20°C (68°F)
If the resistance is not as specified, replace the throttle body.

B11459
OhmmeterE2
VC
± SFITHROTTLE BODY
SF±25
1239 Author: Date:
2001 PRIUS (RM778U)
(c) Reconnect the throttle control motor connector.
3. INSPECT THROTTLE POSITION SENSOR
(a) Disconnect the throttle position sensor connector.
(b) Using an ohmmeter, measure the resistance between ter-
minals VC and E2.
Resistance: 1.2 ± 3.2 kW at 20°C (68°F)
If the resistance is not as specified, replace the throttle position
sensor. (See page SF±29)
(c) Reconnect the throttle position sensor connector.
4. INSPECT ACCELERATOR PEDAL POSITION SEN-
SOR (See page SF±59)

SF0NM±09
B11460
Air Cleaner Assembly
PCV Hose
Purge Line Hose
Throttle Body
AssemblyTrottle Control
Motor Connector
Water Bypass Hose Trottle Position
Sensor Connector

Gasket
N´m (kgf´cm, ft´lbf)

Non±reusable part: Specified torque
20 (204, 15)
20 (204, 15)
SF±26
± SFITHROTTLE BODY
2001 PRIUS (RM778U)
COMPONENTS

B11461
Throttle BodyTrottle Position Sensor
N´m (kgf´cm, ft´lbf) : Specified torque
1.7 (17.5, 15 in.´lbf)
± SFITHROTTLE BODY
SF±27
2001 PRIUS (RM778U)

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 %

SF±30
± SFITHROTTLE BODY
2001 PRIUS (RM778U)
NOTICE:
At the time of tightening the screw, as the sensor itself
tends to turn causing to slanting, check that it is within the
standard value after having finished the torque.
(5) Fully close the throttle valve with a screwdriver and
check that the value of the throttle valve opening
percentage (THROTTLE POS) of the CURRENT
DATA stays with the standard value.
Standard throttle valve opening percentage:
10 ± 14 %
If the throttle valve opening percentage is not as specified, re-
peat steps (4) through (5).
(6) Paint the sensor set screws.
(7) Turn the ignition switch OFF.
(8) Disconnect the TOYOTA hand±held tester or from
the DLC3.
(9) Disconnect the throttle position sensor connector.

CHECK POWER SUPPLY TO IGNITION COIL (WITH
SENSOR (See step 3)
SPARK TEST
Replace the crankshaft position sensor.
CHECK RESISTANCE OF CAMSHAFT POSITION
1. Turn ignition switch to ON.
2. Check that there is battery voltage at ignition coil positive (+)
terminal.
CHECK CONNECTION OF IGNITION COIL
CONNECTOR
Resistance:Cold Hot
CHECK RESISTANCE OF CRANKSHAFT POSITION
Resistance:Cold Hot 1,630 ± 2,740 W2,065 ± 3.225 W
CHECK IGT SIGNAL FROM ECM
(See page
DI±115)
TRY ANOTHER IGNITION COIL (WITH IGNITER)
Replace the camshaft position sensor. Connect securely.
Check wiring between ignition switch
to ignition coil (with igniter).
Check wiring between ECM and ignition
coil (with igniter), and then try another ECM.
NO
OK
OK
OK
OKBAD
BAD
BAD
BAD
BAD
SENSOR (See step 4) IGNITER) CHANGE IT TO NORMAL IGNITION COIL (WITH
IGNITER) AND PERFORM SPARK TEST AGAIN
OKReplace the ignition coil (with igniter).
NO
OK
985 ± 1,600 W1,265 ± 1,890 W
B11755
16 mm (0.63 in.)
Plug Wrench IG±2
± IGNITIONIGNITION SYSTEM
1319 Author: Date:
2001 PRIUS (RM778U)
If the spark does not occur, do the test as follows:
(7) Using a 16 mm (0.63 in.) plug wrench, install the
spark plugs.
Torque: 18 N´m (184 kgf´cm, 13 ft´lbf)
(8) Install the ignition coils (with igniter) (See page
IG±7).
2. INSPECT SPARK PLUGS
(a) Remove the ignition coils (with igniter) (See page
IG±6).
(b) Using a 16 mm (0.63 in.) plug wrench, remove the spark
plugs.

IG0152
IG0148
B02101
B11756
B11757
± IGNITIONIGNITION SYSTEM
IG±3
1320 Author: Date:
2001 PRIUS (RM778U)
(c) Clean the spark plugs.
If the electrode has traces of wet carbon, allow it to dry and then
clean with a spark plug cleaner.
Air pressure: Below 588 kPa (6 kgf/cm
2, 85 psi)
Duration: 20 seconds or less
HINT:
If there are traces of oil, remove it with gasoline before using the
spark plug cleaner.
(d) Check the spark plug for thread damage and insulator
damage.
If abnormal, replace the spark plug.
Recommended spark plug:
DENSO madeSK16R11
NGK madeIFR5A11
(e) Check the electrode gap.
Electrode gap: 1.0 ± 1.1 mm (0.039 ± 0.043 in.)
Maximum electrode gap: 1.2 mm (0.047 in.)
If the electrode gap is greater than maximum, replace the spark
plug.
(f) Using a 16 mm (0.63 in.) plug wrench, install the spark
plugs.
Torque: 18 N´m (184 kgf´cm, 13 ft´lbf)
(g) Install the ignition coils (with igniter) (See page IG±7).
3. INSPECT CAMSHAFT POSITION SENSOR
(a) Disconnect the camshaft position sensor connector.
(b) Using an ohmmeter, measure the resistance between ter-
minals.
Resistance:
Cold1,630 ± 2,740 W
Hot2,065 ± 3,225 W
If the resistance is not as specified, replace the camshaft posi-
tion sensor.
(c) Connect the camshaft position sensor connector.

B11758
B11759
IG±4
± IGNITIONIGNITION SYSTEM
1321 Author: Date:
2001 PRIUS (RM778U)
4. INSPECT CRANKSHAFT POSITION SENSOR
(a) Remove the engine under cover RH.
(b) While sliding the connector lock, remove the connector.
(c) Using an ohmmeter, measure the resistance between the
terminals.
Resistance:
Cold985 ± 1,600 W
Hot1,265 ± 1,890 W
If the resistance is not as specified, replace the crankshaft posi-
tion sensor.
(d) Install the connector.
(e) Install the engine under cover RH.