2001 TOYOTA PRIUS stop start

EC0HV±01
B04812
Gasket
B06544
Vacuum
Gauge
F12396
TOYOTA Hand±held Tester
B11799
± EMISSION CONTROLEVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM
EC±7
2001 PRIUS (RM778U)
INSPECTION
1. REMOVE EXHAUST TAIL PIPE AND HEATED INSULA-
TOR (See page EM±84)
2. INSPECT LINES AND CONNECTORS
Visually check for loose connections, sharp bends or damage.
3. INSPECT FUEL TANK FILLER PIPE
Visually check for deformation, cracks or fuel leakage.
4. INSPECT FUEL TANK CAP
Visually check if the cap and/or gasket are deformed or dam-
aged.
If necessary, repair or replace the cap.
5. INSPECT EVAP SYSTEM LINE
(a) Warm up the engine and stop the engine.
Allow the engine to warm up to normal operating tempera-
ture.
(b) Install a vacuum gauge (EVAP control system test equip-
ment vacuum gauge) to the EVAP service port on the
purge line.
(c) TOYOTA hand±held tester:
Forced driving of the VSV for the EVAP.
(1) Connect a TOYOTA hand±held tester to the DLC3.
(2) Start the engine.
(3) Push the TOYOTA hand±held tester main switch
ON.
(4) Use the ACTIVE TEST mode on the TOYOTA
hand±held tester to operate the VSV for the EVAP.
(d) If you have no TOYOTA hand±held tester:
Forced driving of the VSV for the EVAP.
(1) Disconnect the VSV connector for the EVAP.
(2) Connect the positive (+) and negative (±) leads from
the battery to the VSV terminals for the EVAP.
(3) Start the engine.

B00417
SST
B11832
Fuel Pump
Connector
B00679
Vinyl Bag
SF±2
± SFISFI SYSTEM
1216 Author: Date:
2001 PRIUS (RM778U)
(b) When installing the battery, be especially careful not to in-
correctly connect the positive (+) and negative (±) cables.
(c) Do not permit parts to receive a severe impact during re-
moval or installation. Handle all SFI parts carefully, espe-
cially the ECM.
(d) Be careful during troubleshooting as there are numerous
transistor circuit, and even slight terminal contact can
cause further troubles.
(e) Do not open the ECM cover.
(f) When inspecting during rainy weather, take care to pre-
vent entry of water. Also, when washing the engine
compartment, prevent water from getting on the SFI parts
and wiring connectors.
(g) Parts should be replaced as an assembly.
(h) Care should be taken when pulling out and inserting wir-
ing connectors.
(1) Release the lock and pull out the connector, pulling
on the connectors.
(2) Fully insert the connector and check that it is locked.
(i) Use SST for inspection or test of the injector or its wiring
connector.
SST 09842±30080
7. FUEL SYSTEM
(a) When disconnecting the high fuel pressure line, a large
amount of gasoline will spill out, so observe these proce-
dures.
(1) Disconnect the fuel pump connector.
(2) Start the engine. After the engine has stopped on
its own, turn the ignition switch to LOCK.
(3) Disconnect the fuel tube from the fuel tank.
(4) Drain the fuel remained inside the fuel tube.
(5) Prevent the disconnected fuel tube from damaging
and mixing foreign objects by covering them with a
vinyl bag.

B11815
B00194
SST
SST
(Hose)
Retainer
Fuel pipe
SST
(Hose)
SST
(Hose)
SST
Fuel Tube
Connection
B11794
7
3
Battery
± SFIFUEL PUMP
SF±7
1221 Author: Date:
2001 PRIUS (RM778U)
(d) Disconnect the fuel tube (fuel tube connector) from the
fuel pipe.
CAUTION:

Perform disconnecting operations of the fuel tube
connector (quick type) after observing the precau-
tions.

As there is retained pressure in the fuel pipe line, pre-
vent if from splashing inside the engine comport-
ment.
(e) Install SST (pressure gauge) as shown in the illustration
by using SST and fuel tube connector.
SST 09268±41047 (95336±08070), 09268±45014
(09268±41200, 09268±41220, 09268±41250)
(f) Wipe off any splattered gasoline.
(g) Reconnect the negative (±) terminal cable to the battery.
(h) Connect the TOYOTA hand±held tester to the DLC3.
If you have no TOYOTA hand±held tester, connect the positive
(+) lead from the battery to terminal 3 of the connecter, and the
negative (±) lead to terminal 7.
(i) Measure the fuel pressure.
Fuel pressure:
304 ± 343 kPa (3.1 ± 3.5 kgf/cm
2, 44 ± 50 psi)
If pressure is high, replace the fuel tank.
If pressure is low, check the Fuel hoses and connections, Fuel
pump.
(j) Disconnect the TOYOTA hand±held tester from the
DLC3.
(k) Start the engine.
(l) Measure the fuel pressure at idle.
Fuel pressure:
304 ± 343 kPa (3.1 ± 3.5 kgf/cm
2, 44 ± 50 psi)
(m) Stop the engine.
(n) Check that the fuel pressure remains as specified for 5
minutes after the engine has stopped.

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.

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).

B00319
Recommended Oil Viscosity (SAE):
10W ± 30
5W ± 30 PREFERRED
TEMPERATURE RANGE ANTICIPATED BEFORE NEXT OIL CHANGE100
38 80 60
27 40
16 0
±720
4 ±18 ±20
±29
°C °F
LU02K±08
B11764
Oil Pressure
Switch
B11765
Oil Pressure Gauge
± LUBRICATIONOIL AND FILTER
LU±1
1307 Author: Date:
2001 PRIUS (RM778U)
OIL AND FILTER
INSPECTION
1. CHECK ENGINE OIL QUALITY
Check the oil for deterioration, entry of water, discoloring or thin-
ning.
If the quality is visibly poor, replace the oil.
Oil grade:
API grade or SJ, Energy±Conserving or ILSAC multi-
grade engine oil is recommended. SAE 5W±30 is the
best choice for your vehicle, for good fuel economy,
and good starting in cold weather.
2. CHECK ENGINE OIL LEVEL
After warming up the engine and then 5 minutes after the en-
gine stop, oil level should be between the ºLº and ºFº marks on
the dipstick.
If low. check for leakage and add oil up to the ºFº mark.
NOTICE:
Do not fill with engine oil above the ºFº mark.
3. REMOVE OIL PRESSURE SWITCH, AND INSTALL OIL
PRESSURE GAUGE
(a) Remove the oil pressure switch.
(b) Install the oil pressure gauge.
4. ACTIVATE INSPECTION MODE AND WARM UP EN-
GINE (See page IN±10)
Allow the engine to warm up to normal operating temperature.
5. CHECK OIL PRESSURE
Oil pressure:
At idle speed
29 kPa (0.3 kgf/cm
2, 4.3 psi) or more
At 2,250 rpm
150 ± 550 kPa (1.5 ± 5.6 kgf/cm
2, 22 ± 80 psi)
6. REMOVE OIL PRESSURE GAUGE AND REINSTALL
OIL PRESSURE SWITCH
(a) Remove the oil pressure gauge.

± BRAKETROUBLESHOOTING
BR±3
1518 Author: Date:
2001 PRIUS (RM778U) Noise from brakes
1. Pad or lining (Cracked or distorted)
2. Installation bolt (Loose)
3. Disc or drum (Scored)
4. Pad support plate (Loose)
5. Sliding pin (Worn)
6. Pad or lining (Dirty)
7. Pad or lining (Glazed)
8. Tension or return spring (Faulty)
9. Anti±squeal shim (Damaged)
10.Shoe hold±down spring (Damaged)BR±23
BR±32
BR±26
BR±26
BR±32
BR±23
BR±26
BR±23
BR±32
BR±23
BR±32
BR±32
BR±23
BR±32
Brake warning light lights up*1
(Parking brake pedal released)
1. Brake fluid level
2. Hydraulic brake booster power supply system (Faulty)
BR±41
Brake warning light lights up and brake warning buzzer sounds*2Hydraulic brake booster power supply system (Faulty)BR±41
ABS warning light lights up*31. Anti±lock brake system (Faulty)
2. Hydraulic brake booster power supply system (Faulty)
BR±41
*1, *3: The light may stay on for about 60 seconds after the engine has been started. It is normal if it goes
out after a while.
*
2, *3: Depressing the brake pedal repeatedly may turn on the warning light and buzzer. It is normal if the
light goes out and the buzzer stops sounding after a few seconds.

BE1V2±01
I17845
Power WIndow Master Switch
1 One touch power window does not move up and down.
After turning the ignition switch ON and power window master switch UP or DOWN on the drivers side, check
that the master switch AUTO light blinks.

Error is classified into the following 3 types according to the way of blinking.
UP or DOWNON
OFF
1 Limit switch error 3 Limit switch/Pulse sensor
synchronize error
1.5 secs.
2 secs.Repeat
1.5 secs.0.5 sec.
No Repeat 2 Pulse sensor error
Repeat
< Reference >
When the ignition switch is turned OFF after the AUTO light starts
blinking, the blinking will stop 43 sec. later.

When the ignition switch is turned ON after that, the AUTO light will
start blinking again.
0.5 secs.
Blinks in the 1 way
Remove the master switch.
(Connector connection condition)Master switch defective
Blinks in the 2 or 3 way
1 sec.
CONTINUED ON NEXT PAGECONTINUED ON NEXT PAGE
0.5 sec.0.5 sec. 0.5 sec.
2.5 secs. 4 secs. 4 secs.3.5secs.
± BODY ELECTRICALPOWER WINDOW CONTROL SYSTEM
BE±51
1718 Author: Date:
2001 PRIUS (RM778U)
POWER WINDOW CONTROL SYSTEM
TROUBLESHOOTING