2001 TOYOTA PRIUS battery

B06545
B11800
B06546
Pressure
Gauge
Pressure EC±8
± EMISSION CONTROLEVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM
2001 PRIUS (RM778U)
(e) Check the vacuum at idle.
Vacuum:
Maintain at 0.368 ± 19.713 in. Hg (5 ± 268 in.Aq) for
over 5 seconds
HINT:
If the vacuum does not change, you can conclude that the hose
connecting the VSV to the service port has come loose or is
blocked, or the VSV is malfunctioning.
(f) If you have TOYOTA hand±held tester:
Conclude forced driving of the VSV for the EVAP.
(1) Stop the engine.
(2) Disconnect the TOYOTA hand±held tester from the
DLC3.
(g) If you have no TOYOTA hand±held tester:
Conclude forced driving of the VSV for the EVAP.
(1) Stop the engine.
(2) Disconnect the positive (+) and negative (±) leads
from the battery, and from the VSV terminals for the
EVAP.
(3) Connect the VSV connector for the EVAP.
(h) Disconnect the vacuum gauge from the EVAP service
port on the purge line.
(i) Connect a pressure gauge to the EVAP service port on
the purge line.
(j) Check the pressure.
(1) Close off the air drain hose at the marked position
of the canister with a hose clipper or similar instru-
ment.
(2) Add the pressure (13.5 ± 15.5 in.Aq) from the EVAP
service port.
Pressure:
2 minutes after the pressure is added, the gauge
should be over 7.7 ± 8.8 in.Aq.
HINT:
If you can't add pressure, you can conclude that the hose con-
necting the VSV±canister±fuel tank has slipped off or the VSV
is open.

EC0HW±01
F12396
TOYOTA
Hand±held Tester
DLC3
B11812
B11813
± EMISSION CONTROLTHREE±WAY CATALYTIC CONVERTER (TWC)
SYSTEMEC±13
1213 Author: Date:
2001 PRIUS (RM778U)
THREE±WAY CATALYTIC
CONVERTER (TWC) SYSTEM
INSPECTION
1. CHECK TWC FOR DENTS OR DAMAGE
If any port of the heat insulator is damaged to the extent that it
contacts the three±way catalytic converter, repair or replace it.
2. CHECK EXHAUST PIPE CONNECTIONS FOR LOOSE-
NESS OR DAMAGE
3. CHECK EXHAUST PIPE CLAMPS FOR WEAKNESS,
CRACKS OR DAMAGE
4. CHECK HEAT INSULATOR FOR DAMAGE
5. CHECK FOR ADEQUATE CLEARANCE BETWEEN
EXHAUST SYSTEM AND HEAT INSULATOR ON THE
BODY
6. INSPECT HC ABSORBER AND CATALYST SYSTEM
(a) Warm up the engine.
(b) TOYOTA hand±held tester:
Forced driving of the VSV for the HC absorber and cata-
lyst system.
(1) Connect a TOYOTA hand±held tester to the DLC3.
(2) Start the engine.
(3) Push the TOYOTA hand±held tester mode on the
TOYOTA hand±held tester to operate the VSV for
the HC absorber and catalyst system.
(c) If you have no TOYOTA hand±held tester:
Forced driving of the VSV for the TOYOTA HC absorption
catalyst system.
(1) Disconnect the VSV connector for the TOYOTA HC
absorption catalyst system.
(2) Connect the positive (+) and negative (±) leads from
the battery to the VSV.
(3) Start the engine.
(d) Check that the rod of the actuator is pulled and the valve
is operating.
If not in operation, check the vacuum hose line or VSV, actuator.

SF1KN±01
± SFISFI SYSTEM
SF±1
1215 Author: Date:
2001 PRIUS (RM778U)
SFI SYSTEM
PRECAUTION
1. BEFORE WORKING ON THE FUEL SYSTEM , DIS-
CONNECT THE NEGATIVE (±) TERMINAL CABLE
FROM THE BATTERY AND HV BATTERY SERVICE
PLUG
HINT:
Any diagnostic trouble code retained by the computer will be
erased when the negative (±) terminal cable is removed from
the battery. Therefore, if necessary, read the diagnosis before
removing the negative (±) terminal cable from the battery.
2. DO NOT SMOKE OR WORK NEAR AN OPEN FLAME
WHEN WORKING ON THE FUEL SYSTEM
3. KEEP GASOLINE AWAY FROM RUBBER OR
LEATHER PARTS
4. MAINTENANCE PRECAUTIONS
(a) In event of engine misfire, these precautions should be
taken.
(1) Check proper connection to battery terminals, etc.
(2) After repair work, check that the ignition coil termi-
nals and all other ignition system lines are recon-
nected securely.
(3) When cleaning the engine compartment, be espe-
cially careful to protect the electrical system from
water.
(b) Precautions when handling oxygen sensor.
(1) Do not allow oxygen sensor to drop or hit against an
object.
(2) Do not allow the sensor to come into contact with
water.
If vehicle is Equipped with Mobile Radio System (HAM, CB,
etc.)
If the vehicle is equipped with a mobile communication system,
refer to the precaution in the IN section.
5. AIR INDUCTION SYSTEM
(a) Separation of the engine oil dipstick, oil filler cap, PCV
hose, etc. may cause the engine to run out of turn.
(b) Disconnection, looseness or cracks in the parts of the air
induction system between the throttle body and cylinder
head will allow air suction and cause the engine to run out
of turn.
6. ELECTRONIC CONTROL SYSTEM
(a) Before removing SFI wiring connectors, terminals, etc.,
first disconnect the power by either turning the ignition
switch to LOCK or disconnecting the negative (±) terminal
cable from the battery.
HINT:
Always check the diagnostic trouble code before disconnecting
the negative (±) terminal cable from the battery.

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.

F12396
TOYOTA Hand±Held Tester
DLC3
SF1KO±01
B11794
7
3
Battery
B11816
B09225
Fuel Tube Connector
SF±6
± SFIFUEL PUMP
1220 Author: Date:
2001 PRIUS (RM778U)
FUEL PUMP
ON±VEHICLE INSPECTION
1. CHECK FUEL PUMP OPERATION
(a) Connect the TOYOTA hand±held tester to the DLC3.
(b) Turn the ignition switch ON and TOYOTA hand±held tes-
ter main switch ON.
NOTICE:
Do not start the engine.
(c) Select the active test mode on the TOYOTA hand±held
tester.
(d) Please refer to the TOYOTA hand±held tester operator's
manual for further details.
(e) If you have no TOYOTA hand±held tester, connect the
positive (+) lead from the battery to terminal 3 of the con-
necter, and the negative (±) lead to terminal 7.
(f) Check that there is pressure in the fuel inlet pipe from the
fuel line.
HINT:
If there is fuel pressure, you will hear the sound if fuel following.
If there is no pressure, check these parts, Fusible link, Fuses,
EFI Main relay, Fuel pump, ECM, and Witting connector.
(g) Turn the ignition switch to LOCK.
(h) Disconnect the TOYOTA hand±held tester from the
DLC3.
2. CHECK FUEL PRESSURE
(a) Check the battery positive voltage is above 12 V.
(b) Disconnect the negative (±) terminal cable from the bat-
tery.
(c) Purchase the new fuel tube and take out the fuel tube
connector from its pipe.
Part No.: 23901±21020

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.

A13909
B11793
7
3Ohmmeter
B11794
7
3
Battery
SF±8
± SFIFUEL PUMP
1222 Author: Date:
2001 PRIUS (RM778U)
Fuel pressure:
147 kPa (1.5 kgf/cm
2, 21 psi) or more
If pressure is not as specified, check the fuel pump and/or injec-
tors.
(o) After checking fuel pressure, disconnect the negative (±)
terminal cable from the battery and carefully, remove the
SST and fuel tube connector to prevent gasoline from
splashing.
SST 09268±41047 (95336±08070), 09268±45014
(09268±41200, 09268±41220, 09268±41250)
(p) Reconnect the fuel tube (fuel tube connector).
CAUTION:
Perform connecting operations of the fuel tube connector
(quick type) after observing the precautions.
(q) Reconnect the negative (±) terminal cable to the battery.
(r) Check for fuel leakage.
3. REMOVE REAR SEAT CUSHION
4. REMOVE FLOOR SERVICE HOLE COVER
5. DISCONNECT FUEL PUMP & SENDER GAUGE CON-
NECTOR
6. INSPECT FUEL PUMP RESISTANCE
Using an ohmmeter, measure the resistance between terminals
3 and 7.
Resistance: 0.2 ± 3.0 W at 20°C (68 °F)
If the resistance is not as specified, replace the fuel tank.
7. INSPECT FUEL PUMP OPERATION
Connect the positive (+) lead from the battery to terminal 3 of
the connector and the negative (±) terminal 7. Check that the
pump operates.
NOTICE:

These tests must be done quickly (within 10 seconds)
to prevent the coil burning out.

Keep fuel pump as far away from the battery as pos-
sible.

Always do the switching at the battery side.
If operation is not as specified, replace the lead wire or fuel tank.
8. RECONNECT FUEL PUMP & SENDER GAUGE CON-
NECTOR
9. REINSTALL FLOOR SERVICE HOLE COVER
10. REINSTALL REAR SEAT CUSHION

B00416
SST
(Wire)
Battery
B00069
± SFIINJECTOR
SF±13
2001 PRIUS (RM778U)
(j) If you have no TOYOTA hand±held tester, connect the
positive (+) and negative (±) leads from the battery to the
fuel pump connector (See page SF±9).
(k) Connect SST (wire) to the injector and battery for 15 se-
conds, and measure the injection volume with a gra-
duated cylinder. Test each injector 2 or 3 times.
SST 09842±30080
Volume:
36 ± 46 cm
3 (2.1 ± 2.8 cu in.) per 15 sec.
Difference between each injector:
10 cm
3 (0.6 cu in.) or less
If the injection volume is not as specified, replace the injector.
2. INSPECT LEAKAGE
(a) In the condition above, disconnect the test probes of SST
(wire) from the battery and check the fuel leakage from
the injector.
SST 09842±30080
Fuel drop:
1 drop or less per 12 minutes
(b) Turn the ignition switch to LOCK.
(c) Disconnect the negative (±) terminal cable from the bat-
tery.
(d) Remove the SST and fuel tube connector.
SST 09268±41047
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 it from splashing inside the engine compart-
ment.
(e) Disconnect the TOYOTA hand±held tester from the
DLC3.