TOYOTA PRIUS 2001 Service Repair Manual

B03551
Ohmmeter
ContinuityOhmmeter
No Continuity4
1
32
5Battery
I18027
No. 3 Cooling
Fan Relay
B03548
Ohmmeter
No ContinuityOhmmeter
Continuity
5
3 12
B03549
Ohmmeter
Continuity5
3 12
Battery CO±28
± COOLINGCOOLING FAN RELAY
1306 Author: Date:
2001 PRIUS (RM778U)
(d) Inspect the No. 2 cooling fan relay operation.
(1) Apply battery voltage across terminals 1 and 2.
(2) Using an ohmmeter, check that no continuity exists
between terminals 3 and 4.
If continuity exists, replace the relay.
(3) Using an ohmmeter, check that continuity exists be-
tween terminals 3 and 5.
If no continuity exists, replace the relay.
(e) Reinstall the No. 2 cooling fan relay.
(f) Reinstall the relay box cover.
3. INSPECT NO. 3 COOLING FAN RELAY
(a) Remove the relay box cover.
(b) Remove the No. 3 cooling fan relay. (Marking: Fan NO. 3)
(c) Inspect the No. 3 cooling fan relay continuity.
(1) Using an ohmmeter, check that continuity exists be-
tween terminals 1 and 2.
If no continuity exists, replace the relay.
(2) Check that no continuity exists between terminals
3 and 5.
If continuity exists, replace the relay.
(d) Inspect the No. 3 cooling fan relay operation.
(1) Apply battery voltage across terminals 1 and 2.
(2) Using an ohmmeter, check that continuity exists be-
tween terminals 3 and 5.
If no continuity exists, replace the relay.
(e) Reinstall the No. 3 cooling fan relay.
(f) Reinstall the relay box cover.

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.

P12478
Adhesive
LU±2
± LUBRICATIONOIL AND FILTER
1308 Author: Date:
2001 PRIUS (RM778U)
(b) Apply adhesive to 2 or 3 threads of the oil pressure switch.
Adhesive:
Part No. 08833±00080, THREE BOND 1344,
LOCTITE 242 or equivalent
(c) Install the oil pressure switch.
Torque: 13 N´m (130 kgf´cm, 9 ft´lbf)
7. START ENGINE AND CHECK FOR LEAKS

LU02M±08
A13942
Wiper Arm
VSV for EVAPAir Cleaner
Assembly
RH Engine Mounting
Insulator
Engine Under
Cover RH
N´m (kgf´cm, ft´lbf) : Specified torqueOuter Front Cowl
Top Panel
26 (265, 19)
52 (530, 38)
60 (612, 44)
52 (530, 38)
Air Inlet
Engine Coolant
Reservoir TankBrake reservoir
Tank
Wiper Motor and
Wiper Link
AssemblyHeat to Cowl Top
Seal
Cowl Top Ventilator
Lower LH Cowl Top Ventilator
Lower LH
R/B (ABS)
26 (265, 19)
7 (71, 62 in. lbf)
LU±4
± LUBRICATIONOIL PUMP
1310 Author: Date:
2001 PRIUS (RM778U)
OIL PUMP
COMPONENTS

A13926
RH Engine Mounting Bracket
Timing Chain Cover
Cylinder Head Cover

Crankshaft Front Oil Seal
Gasket
Water Pump Crankshaft Pulley
PCV Hose
N´m (kgf´cm, ft´lbf) : Specified torque

Non±reusable part
Water Pump Pulley
Ignition Coil
(w/ Ignitor)


O±Ring


O±Ring
15 (150, 11)
11 (110, 8)
15 (150, 11)


Gasket
Pin128 (1,300, 94)
± LUBRICATIONOIL PUMP
LU±5
1311 Author: Date:
2001 PRIUS (RM778U)

B09334
Timing Chain Cover
Driven Rotor
Drive Rotor Oil Pump Cover
Relief Valve
Spring
25 (255, 18)
N´m (kgf´cm, ft´lbf) : Specified torque
8.8 (90, 78 in.´lbf)
10.3 (105, 8)
LU±6
± LUBRICATIONOIL PUMP
1312 Author: Date:
2001 PRIUS (RM778U)

IG0EP±07
± IGNITIONIGNITION SYSTEM
IG±1
1318 Author: Date:
2001 PRIUS (RM778U)
IGNITION SYSTEM
ON±VEHICLE INSPECTION
NOTICE:
ºColdº and ºHotº in these sentences express the tempera-
ture of the coils themselves. ºColdº is from ±10°C (14°F) to
50°C (122°F) and ºHotº is from 50°C (122°F) to 100°C
(212°F).
1. INSPECT IGNITION COIL (WITH IGNITER) AND
SPARK TEST
Check that the spark occurs.
(1) Remove the ignition coils (with igniter) (See page
IG±6).
(2) Using a 16 mm (0.63 in.) plug wrench, remove the
spark plugs.
(3) Install the spark plugs to each ignition coils (with ig-
niter), and connect the ignition coil connectors.
(4) Disconnect the 4 injector connectors.
(5) Ground the spark plugs.
(6) Check if spark occurs while engine is being
cranked.
NOTICE:
To prevent gasoline from being injected from injectors dur-
ing this test, crank the engine for no more than 5 ± 10 se-
conds at time.

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.