2001 TOYOTA PRIUS spark plugs replace

MA00R±17
B08810
± MAINTENANCEENGINE
MA±5
58 Author: Date:
2001 PRIUS (RM778U)
ENGINE
INSPECTION
HINT:
Inspect these items when the engine is cold.
1. INSPECT DRIVE BELT
(See page CO±4)
2. REPLACE SPARK PLUGS
(See page IG±1)
3. INSPECT AIR FILTER
(a) Visually check that the air filter is not excessively dirty or
oily.
HINT:
Oiliness may indicate a stuck PCV valve.
If necessary, replace the air cleaner element.
(b) Clean the air filter with compressed air.
First blow from the inside thoroughly, then blow off the
outside of the element.
4. REPLACE AIR FILTER
Replace the air filter with a new one.
5. REPLACE ENGINE OIL AND OIL FILTER
(See page LU±3)
6. REPLACE ENGINE COOLANT
(See page CO±2)
7. INSPECT CHARCOAL CANISTER
(Se page EC±7)
8. REPLACE GASKET IN FUEL TANK CAP
(See page SF±19)
9. INSPECT FUEL LINES AND CONNECTIONS
(See page SF±19)
10. INSPECT EXHAUST PIPES AND MOUNTINGS
(See page EC±13)
11. ADJUST VALVE CLEARANCE
(See page EM±5)

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.