2001 TOYOTA PRIUS Service Repair Manual

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.

B11807
SF1KX±01
B11808
B11746
Ohmmeter
Continuity
B11747
Ohmmeter
No Continuity
B11748
Air A B
A SF±42
± SFIVSV FOR CANISTER CLOSED VALVE (CCV)
2001 PRIUS (RM778U)
INSPECTION
1. REMOVE FUEL TANK (See page SF±17)
2. REMOVE VSV
(a) Disconnect the air inlet hoses from the VSV for canister
closed valve.
(b) Disconnect the connector from the VSV for canister
closed valve.
(c) Remove the bolt and disconnect the air opening valve
from the VSV for canister closed valve.
(d) Remove the 2 bolts and VSV for canister closed valve
with the trap filter.
(e) Remove the 2 bolts and VSV for canister closed valve
from the trap filter.
3. INSPECT VSV FOR OPEN CIRCUIT
Using an ohmmeter, check that there is continuity between the
terminals.
Resistance: 25 ± 30 W at 20 °C (68 °F)
If there is no continuity, replace the VSV.
4. INSPECT VSV FOR GROUND
Using an ohmmeter, check that there is no continuity between
each terminal and the body.
If there is no continuity, replace the VSV.
5. INSPECT VSV OPERATION
(a) Check that air flows from ports A to B.

B11749
Battery
Air A B
± SFIVSV FOR CANISTER CLOSED VALVE (CCV)
SF±43
2001 PRIUS (RM778U)
(b) Apply battery positive voltage across the terminals.
(c) Check that air does not flow from ports A to B.
If operation is not as specified, replace the VSV.
6. REINSTALL VSV

CO04E±09
B11768
Engine
Drain Plug
Radiator
Drain Plug
CO±2
± COOLINGCOOLANT
2001 PRIUS (RM778U)
REPLACEMENT
1. DRAIN ENGINE COOLANT
(a) Remove the radiator cap.
CAUTION:
To avoid the danger of being burned, do not remove the ra-
diator cap while the engine and radiator are still hot, as fluid
and steam can be blown out under pressure.
(b) Loosen the radiator drain plug (on the right side of the ra-
diator lower tank) and engine drain plug on the engine
coolant drain union (on the right front of the cylinder
block), and drain the coolant.
(c) Close the drain plugs.
Torque: 12.7 N´m (130 kgf´cm, 9 ft´lbf) for engine
2. FILL ENGINE COOLANT
(a) Slowly fill the system with coolant.

Use of improper coolants may damage the engine
cooling system.

Use ºToyota Long Life Coolantº or equivalent and
mix it with plain water according to the manufacture
directions.

Use of the coolant which includes more than 50%
[freezing protection down to ±35°C (±31°F)] or 60%
[freezing protection down to ±50°C (±58°F)] of eth-
ylene±glycol is recommended, but not more than
70%.
NOTICE:

Do not use an alcohol type coolant or plain water
alone.

The coolant should be mixed with plain water (prefer-
ably demineralized water or distilled water).
Capacity: 4.9 litters (5.2 US qts, 4.3 lmp qts)
(b) Install the radiator cap and start the engine. After repeat-
edly idling and racing the engine several times for approx.
2 minutes, stop the engine.
(c) Remove the radiator cap and fill the radiator with engine
coolant until it reaches the rim of the radiator filler.
If the engine coolant level of the radiator drops when grasping
the radiator inlet hose and outlet hose several times by hand,
add more coolant.
(d) Install the radiator cap. Activate inspection mode (See
page IN±10). Warm it up until the radiator fan starts to turn
with the engine speed at less than 2,500 rpm.
NOTICE:
Stop the engine immediately after the radiator fan starts to
turn.
(e) Stop the engine and cool it down.
NOTICE:
Cool down the engine until its temperature becomes below
50°C (122 °F).

± COOLINGCOOLANT
CO±3
2001 PRIUS (RM778U)
(f) Remove the radiator cap and check the engine coolant
level of the radiator. If it has dropped, repeat steps (d) to
(g).
(g) Bleed air from water pump.
Set the vehicle in the following conditions:

Ignition switch ON

Blower speed control dial to LO

Temperature control dial to MAX. HOT
(h) Operate the water pump in the following conditions:

The engine stopped

The blower switch ON

Temperature control dial at MAX. HOT
HINT:
Operate the water pump until a sound of the air±containing en-
gine coolant can not be heard from the heater core.
(i) When the engine coolant remains full, fill the radiator res-
ervoir tank with engine coolant to the maximum level.
3. CHECK FOR COOLANT LEAKS
4. CHECK ENGINE COOLANT SPECIFIC GRAVITY IS
CORRECT