Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Sienna 2004-2007 Approved SRM 04 18 20ur4 i740001
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18-3
IGNITION - IGNITION SYSTEM
1807E-02
INSPECTION
1. INSPECT SPARK PLUG
NOTICE:
S Do not use a wire brush for cleaning.
S Do not attempt to adjust the electrode gap of a used
spark plug.
S Spark plug should be replaced every 200,000 km
(120,000 miles).
Ohmmeter (a) Check the electrode.
(1) Using an ohmmeter, measure the insulation resis-
tance.
Correct insulation resistance: 10 M or more
If the resistance is less than the specified value, proceed to step
(d).
HINT:
If the ohmmeter is not available, do the following simple inspec-
Ground IG0147 tion instead.
(b) Simple inspection method:
(1) Run the engine to 4,000 rpm 5 times quickly.
(2) Remove the spark plug.
(3) Visually check the spark plug.
(4) If the electrode is dry...OK.
(5) If the electrode is wet...Proceed to step (C).
(6) Reinstall the spark plug.
B01301
(c) Check the spark plug for any damage on its thread and
insulator.
If there is damage, replace the spark plug.
Recommended spark plug:
DENSO made SK20R11
NGK made IFR6A11
IG0316
(d) Check the spark plug electrode gap.
Maximum electrode gap for used spark plug:
1.3 mm (0.051 in.)
If the gap is greater than maximum, replace the spark plug.
Correct electrode gap for new spark plug:
1.0 to 1.1 mm (0.039 to 0.043 in.)
1.1 mm
B02101
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 2547
18-4
IGNITION - IGNITION SYSTEM
(e) Clean the spark plugs.
If the electrode has traces of wet carbon, clean the electrode
with a spark plug cleaner, then dry it.
Air pressure: Blow 588 kPa (6 kgf/cm2, 85 psi)
Duration: 20 seconds or less
HINT:
If there are traces of oil, remove it with gasoline before using the
spark plug cleaner.
B62019
2. INSPECT VVT SENSOR
(a) Using an ohmmeter, measure the resistance between the terminals.
RESISTANCE:
835 to 1,400 at cold
1,060 to 1,645 at hot
NOTICE:
"Cold" and "Hot" mean the temperature of the coils themselves."Cold" is from -10_C (14_F) to 50
_C (122 _F) and "Hot" is from 50 _C (122 _F) to 100 _C (212 _F).
3. INSPECT CRANKSHAFT POSITION SENSOR
(a) Using an ohmmeter, measure the resistance between the terminals.
RESISTANCE:
1,630 to 2,740 at cold
2,065 to 3,225 at hot
NOTICE:
"Cold" and "Hot" mean the temperature of the coils themselves."Cold" is from -10_C (14_F) to 50
_C (122 _F) and "Hot" is from 50 _C (122 _F) to 100 _C (212 _F).
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 2548
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