Page 940 of 1897

B02101B04941
A06102
1.1 mm
A02024
ON
#10
#20 #40
(+)
#50 #60#30
(-)
- DIAGNOSTICSENGINE
DI-61
217 Author: Date:
2001 AVALON   (RM808U)
2 Check spark plug and spark of misfiring cylinder.
PREPARATION:
(a) Remove the ignition coil (See page IG-5).
(b) Remove the spark plug.
CHECK:
(a) Check spark plug type.
(b) Check the electrode for carbon deposits.
(c) Check electrode gap.
OK:
(a)  Iridium-tipped spark plug
Recommended spark plug:
DENSO made: SK20R11
NGK made: IFR6A11
(b)  No large carbon deposit present.
Not wet with gasoline or oil.
(c)  Electrode gap: 1.1 mm (0.043 in.)
PREPARATION:
(a) Install the spark plug to the ignition coil, and connect the
ignition coil connector.
(b) Disconnect the injector connector.
(c) Ground the spark plug.
CHECK:
Check if spark occurs while engine is being cranked.
OK:
Spark jumps across electrode gap.
NG Replace or check ignition system (See page 
IG-1).
OK
3 Check voltage of ECM terminal for injector of failed cylinder.
PREPARATION:
(a) Remove the glove compartment (See page SF-82).
(b) Turn the ignition switch ON.
CHECK:
Measure the voltage between applicable terminal of the ECM
connector and body ground.
OK:
Voltage: 9 - 14 V 
     
        
        Page 1354 of 1897

A05195
IntakeMain Gear
Sub-Gear
Service Bolt
A05207
Intake
7
8
5
6
3
41 2
9
10
A05197
7
85
6
3
41
2
9
10 Exhaust EM-36
- ENGINE MECHANICALCYLINDER HEAD
1020 Author: Date:
2001 AVALON   (RM808U)
(2) Secure the exhaust camshaft sub-gear to the main
gear with a service bolt.
Recommended service bolt:
Thread diameter6 mm
Thread pitch1.0 mm
Bolt length16 - 20 mm (0.63 - 0.79 in.)
HINT:
When removing the camshaft, mark certain that the torsional
spring force of the sub-gear has been eliminated by the above
operation.
(3) Uniformly loosen and remove the 10 bearing cap
bolts in several passes and in the sequence shown.
(4) Remove the 5 bearing caps and intake camshaft.
(b) Remove the exhaust camshaft.
(1) Uniformly loosen and remove the 10 bearing cap
bolts in several passes and in the sequence shown.
(2) Remove the 5 bearing caps, oil seal and exhaust
camshaft.
30. REMOVE CAMSHAFTS OF LH CYLINDER HEAD
NOTICE:
Since the thrust clearance of the camshaft is small, the
camshaft must be kept leveled while it is being installed. If
the camshaft is not kept leveled, the portion of the cylinder
head receiving the shaft thrust may crack or be damaged,
causing the camshaft to seize or break. To avoid this, the
following steps should be carried out. 
     
        
        Page 1355 of 1897

A05284Align Intake
A05198
Intake
Main GearSub-GearService Bolt
A05199
Intake
7
85
6
3
4
1
2
9
10
A05200
7
8
5
6
3
4
1
2
9
10 Exhaust
- ENGINE MECHANICALCYLINDER HEAD
EM-37
1021 Author: Date:
2001 AVALON   (RM808U)
(a) Remove the intake camshaft.
(1) Align the timing marks (1 dot mark) of the camshaft
drive and driven gears by turning the camshaft with
a wrench.
(2) Secure the exhaust camshaft sub-gear to the main
gear with a service bolt.
Recommended service bolt:
Thread diameter6 mm
Thread pitch1.0 mm
Bolt length16 - 20 mm (0.63 - 0.79 in.)
HINT:
When removing the camshaft, make sure that the torsional
spring force of the sub-gear has been eliminated by the above
operation.
(b) Uniformly loosen and remove the 10 bearing cap bolts in
several passes and in the sequence shown.
(c) Remove the 5 bearing caps and intake camshaft.
(d) Remove the exhaust camshaft.
(1) Uniformly loosen and remove the 10 bearing cap
bolts in several passes and in the sequence shown.
(2) Remove the 5 bearing caps, oil seal and exhaust
camshaft.
HINT:
Arrange the camshafts in the correct order.
Arrange the bearing caps in the correct order. 
     
        
        Page 1404 of 1897

IG0147
Megger
Ground
B02629
P13225
16 mm Plug
Wrench
B02630
1.1 mm IG-2
- IGNITIONIGNITION SYSTEM
1245 Author: Date:
2001 AVALON   (RM808U)
2. INSPECT SPARK PLUGS
NOTICE:
Never use a wire brush for cleaning.
Never attempt to adjust the electrode gap on a used
spark plug.
Spark plugs should be replaced every 193,000 km
(120,000  miles).
(a) Remove the 6 ignition coils (with igniters) (See page 
IG-5).
(b) Inspect the electrode.
Using a megger (insulation resistance meter), mea-
sure the insulation resistance.
Standard correct insulation resistance:
10 MW or more
If the resistance is less than specified, proceed to step (d).
HINT:
If a megger is not available, these simple method of inspection
provides fairly accurate results.
Simple Method:
Quickly race the engine to 4,000 rpm 5 times.
Remove the spark plug (See step (c)).
Visually check the spark plug.
If the electrode is dry ... OK
If the electrode is wet ... Proceed to step (d)
Reinstall the spark plug (See step (g)).
(c) Using a 16 mm plug wrench, remove the 6 spark plugs.
(d) Visually check the spark plug for thread damage and insu-
lator damage.
If abnormal, replace the spark plug.
Recommended spark plug:
DENSO madeSK20R11
NGK madeIFR6A11
(e) Inspect the electrode gaps.
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:
1.1 mm (0.043 in.)
NOTICE:
If adjusting the gap of a new spark plug, bend only the base
of the ground electrode. Do not touch the tip. Never attempt
to adjust the gap on the used plug. 
     
        
        Page 1448 of 1897

B00319
Recommended Viscosity (SAE):
TEMPERATURE RANGE ANTICIPATED BEFORE NEXT OIL CHANGE10W-30
5W-30 PREFERRED°C °F
-20
-290
-1820
-740
460
1680
27100
38
LU0G0-02
B08674SST
B08675
Oil Pressure
Gauge
- LUBRICATIONOIL AND  FILTER
LU-1
1226 Author: Date:
2001 AVALON   (RM808U)
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 SJ, Energy-Conserving or ILSAC multi-
grade engine oil.
SAE  5W  -  30 is the best choice for your vehicle, for
good fuel economy, and good starting in cold weath-
er.
2. CHECK ENGINE OIL LEVEL
After warm up the engine and then 5 minutes after the engine
stop, oil level should be between the low level and full level
marks on the dipstick.
If low, check for leakage and add oil up to the full level mark.
NOTICE:
Do not fill with engine oil above the full level mark.
3. REMOVE OIL PRESSURE SWITCH, AND INSTALL
OIL PRESSURE GAUGE
(a) Using SST, remove the oil pressure switch.
SST 09816-30010
(b) Install the oil pressure gauge.
4. WARM UP ENGINE
Allow the engine to warm up to normal operating temperature.
5. CHECK OIL PRESSURE
Oil pressure:
At idle29 kPa (0.3 kgf/cm2, 4.3 psi) or more
At 3,000 rpm294 - 539 kPa (3.0 - 5.5 kgf/cm2, 43 - 78 psi)