Page 2097 of 5135
14±110
±
ENGINE MECHANICAL VALVE CLEARANCE(1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
(h)Install the camshafts. (See page 14±171)
(i)Install the chain tensioner. (See page 14±171)
10.INSTALL CYLINDER HEAD COVER SUB±ASSY (See page 14±171)
11. INSTALL IGNITION COIL ASSY
Torque: 9.0 N m (92 kgf cm, 80 in. lbf)
12. CHECK FOR ENGINE OIL LEAKS
13. INSTALL ENGINE COVER SUB±ASSY NO.1 Torque: 7.0 N m (71 kgf cm, 62 in. lbf)
Page 2098 of 5135
141B5±01
A77293
SST
± ENGINE MECHANICALFAN AND GENERATOR V BELT (1AZ±FE)
14±105
AVENSIS REPAIR MANUAL (RM1018E)
FAN AND GENERATOR V BELT (1AZ±FE)
REPLACEMENT
1. REMOVE RADIATOR SUPPORT OPENING COVER
2. REMOVE ENGINE ROOM COVER SIDE
3. REMOVE ENGINE UNDER COVER RH
4. REMOVE FAN AND GENERATOR V BELT
(a) Using SST, loosen the V±ribbed belt tensioner arm clock-
wise, and remove the fan and generator V belt.
SST 09249±63010
5. INSTALL FAN AND GENERATOR V BELT
(a) Using SST, loosen the V±ribbed belt tensioner arm clockwise, and install the fan and generator V belt.
SST 09249±63010
Page 2099 of 5135

140D1±02
CG
TCA51075
A52004
±
ENGINE MECHANICAL ENGINE(1AZ±FE)
14±101
AVENSIS REPAIR MANUAL (RM1018E)
ENGINE(1AZ±FE)
INSPECTION
1.INSPECT COOLANT (See page 16±13)
2.INSPECT ENGINE OIL (See page 17±6)
3. INSPECT BATTERY
Standard specific gravity: 1.25 to 1.29 at 20 C (68 F)
4. INSPECT AIR CLEANER FILTER ELEMENT SUB±ASSY
5.INSPECT SPARK PLUG (See page 18±9)
6. INSPECT V±RIBBED BELT
7. INSPECT IGNITION TIMING
(a) Warm up engine.
(b) When using hand±held tester:(1) Connect the hand±held tester to the DLC3.
(2) Enter DATA LIST MODE on the hand±held tester.
Ignition timing: 8 to 12 BTDC
HINT:
Please refer to the hand±held tester operator's manual if you
need help to select DATA LIST.
(c) When not using hand±held tester:
(1) Using SST, connect terminals 13 (TC) and 4 (CG)of DLC3.
SST 09843±18040
NOTICE:
Make sure of the terminal numbers before connecting
them. Connection with a wrong terminal can damage
the engine.
Turn OFF all electrical systems before connecting the
terminals.
Operate the inspection after the cooling fan motor is
turned OFF.
(2) Remove the cylinder head cover No.2.
(3) Pull out the wire harness as shown in the illustration.
Connect the clip of the timing light to the engine.
NOTICE:
Use a timing light which detects the first signal.
After checking, be sure to wrap the wire harness with
tape.
(4) Inspect ignition timing at idle.
Ignition timing: 8 to 12 BTDC
NOTICE:
When checking the ignition timing, shift the transmission
to the neutral position.
HINT:
Run the engine at 1,000 to 1,300 rpm for 5 seconds, check that
the engine rpm returns to the idle speed.
Page 2100 of 5135

TA C
A52006
A13304
14±102
± ENGINE MECHANICALENGINE (1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
(5) Disconnect terminals 13 (TC) and 4 (CG) of DLC3.
(6) Inspect ignition timing at idle.
Ignition timing: 5 to 15 BTDC
(7) Confirm that ignition timing to go advanced angle
side when the engine rpm is increased.
(8) Remove the timing light.
8. INSPECT ENGINE IDLE SPEED
(a) Warm up engine.
(b) When using hand±held tester:
(1) Connect the hand±held tester to the DLC3.
Idle speed: 650 to 750 rpm
NOTICE:
Check the idle speed with the cooling fan OFF.
Switch off all accessories and air conditioning before
connecting the test prove to the terminal.
HINT:
Please refer to the hand±held tester operator's manual if you
need help to select DATA LIST.
(c) When not using hand±held tester.
(1) Using SST, connect the tachometer test prove to
terminal 9 (TAC) of DLC3.
SST 09843±18040
(2) Check the idle speed.
Idle speed: 650 to 750 rpm
9. INSPECT COMPRESSION
(a) Warm up and stop the engine.
(b) Disconnect the injector connectors.
(c) Remove the ignition coil.
(d) Remove the spark plugs.
(e) Inspect cylinder compression pressure.
SST 09992±00500
(1) Insert a compression gauge into the spark plug
hole.
(2) Fully open the throttle.
Page 2101 of 5135

±
ENGINE MECHANICAL ENGINE(1AZ±FE)
14±103
AVENSIS REPAIR MANUAL (RM1018E)
(3)While cranking the engine, measure the compres-
sion pressure.
Compression pressure:
1,300 kPa (13.3 kgf/cm
2, 189 psi)
Minimum pressure:
1000 kPa (10.2 kgf/cm
2, 145 psi)
Difference between each cylinder:
100 kPa (1.0 kgf/cm
2, 14 psi)
NOTICE:
Always use a fully charged battery to obtain engine
speed of 250 rpm or more.
Check other cylinder's compression pressure in the
same way.
This measurement must be done in as short a time as
possible.
(4)If the cylinder compression is low, pour a small amount of engine oil into the cylinder through the
spark plug hole and inspect again.
HINT:
If adding oil increases the compression, the piston rings
and/or cylinder bore may be worn or damaged.
If pressure stays low, a valve may be sticking or seating
improperly, or there may be leakage past the gasket.
10.INSPECT CO/HC
(a)Start the engine.
(b)Run the engine at 2,500 rpm for approximately 180 seconds.
(c)Insert CO/HC meter testing probe at least 40 cm (1.3 ft) into the tail\
pipe during idling.
(d)Check CO/HC concentration at idle. Idle CO concentration: 0 to 0.5 %
Idle HC concentration: Applicable local regulation
(e)If the CO/HC concentration does not conform to specifications, perform troubleshooting in the order given below.
(1)Check heated oxygen sensor operation. (See page 12±6)
(2) See the table below for possible causes, and then inspect and repair the applicable causes ifnecessary.
Page 2102 of 5135
14±104
± ENGINE MECHANICALENGINE (1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)CO
HCProblemsCauses
NormalHighRough idle
1. Faulty ignitions:
Incorrect timing
Fouled, shorted or improperly gapped plugs
2. Incorrect valve clearance
3. Leaks in intake and exhaust valves
4. Leaks in cylinders
LowHighRough idle
(Fluctuating HC reading)
1. Vacuum leaks:
PCV hoses
Intake manifold
Throttle body
ISC valve
Brake booster line
2. Lean mixture causing misfire
HighHighRough idle
(Black smoke from exhaust)
1. Restricted air filter
2. Plugged PCV valve
3. Faulty EFI systems:
Faulty pressure regulator
Defective water temperature sensor
Defective mass air flow meter
Faulty ECM
Faulty injectors
Faulty throttle position sensor
Page 2103 of 5135

141CO±01
A62838SST
A62838SST
A62202
Cut Position
A62203
SST
14±98
±
ENGINE MECHANICAL ENGINE REAR OIL SEAL(1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
ENGINE REAR OIL SEAL(1ZZ±FE/3ZZ±FE)
REPLACEMENT
1.REMOVE MANUAL TRANSAXLE ASSY (M/T TRANSAXLE) (See page 41±15)
2.REMOVE AUTOMATIC TRANSAXLE ASSY (A/T TRANSAXLE) (See page 40±11)
3.REMOVE CLUTCH COVER ASSY (M/T TRANSAXLE) (See page 42±26)
4.REMOVE CLUTCH DISC ASSY (M/T TRANSAXLE) (See page 42±26) 5. REMOVE FLYWHEEL SUB±ASSY (M/T TRANSAXLE)
(a) Hold the crankshaft with SST, remove the 8 bolts and theflywheel.
SST 09960±10010 (09962±01000, 09963±01000)
6. REMOVE DRIVE PLATE & RING GEAR SUB±ASSY (A/T TRANSAXLE)
(a) Hold the crankshaft with SST, remove the 8 bolts and the drive plate & ring gear.
SST 09960±10010 (09962±01000, 09963±01000)
7. REMOVE ENGINE REAR OIL SEAL
(a) Using a knife, cut off the oil seal lip.
(b) Using a screwdriver with the tip wrapped in tape, pry out the oil seal.
NOTICE:
After the removal, check if the crankshaft is not damaged.
If it is damaged, smooth the surface with 400±grid sandpa-
per.
8. INSTALL ENGINE REAR OIL SEAL
(a) Apply MP grease to a new oil seal lip.
NOTICE:
Keep the lip off foreign materials.
(b) Using SST, tap in the oil seal until its surface is flush with the rear oil seal retainer edge.
SST 09223±15020, 09950±70010 (09951±07100)
NOTICE:
Wipe off extra grease on the crankshaft.
Page 2104 of 5135

A62838SST
A62205
1
5
3
82
6
4
7
A62206
90
A62838SST
A62204
1
5
3
82
6
4
7
±
ENGINE MECHANICAL ENGINE REAR OIL SEAL(1ZZ±FE/3ZZ±FE)
14±99
AVENSIS REPAIR MANUAL (RM1018E)
9.INSTALL FLYWHEEL SUB±ASSY (M/T TRANSAXLE)
(a)Fix the crankshaft with SST.
SST09960±10010 (09962±01000, 09963±01000)
(b)Clean the bolt and bolt hole.
(c)Apply adhesive to the bolts. Adhesive:
Part No. 09330±00070, THREE BOND or equivalent.
(d)Using several steps, Install and tighten the 8 bolts uni- formly in the sequence shown in the illustration.
Torque: 49 N m (500 kgf cm, 36 ft lbf)
(e)Mark the bolts with paint as shown in the illustration.
(f)Retighten the bolts by an additional 90 in the same se-
quence as step (d).
(g)Check that the paint marks of each bolt are at 90 angle
from the original position.
10.INSTALL CLUTCH DISC ASSY (M/T TRANSAXLE) (See page 42±26)
11. INSTALL CLUTCH COVER ASSY (M/T TRANSAXLE) (See page 42±26)
12. INSTALL DRIVE PLATE & RING GEAR SUB±ASSY (A/T TRANSAXLE)
(a) Fix the crankshaft with SST. SST 09960±10010 (09962±01000, 09963±01000)
(b) Clean the bolt and bolt hole.
(c) Apply adhesive to the bolts. Adhesive:
Part No. 09330±00070, THREE BOND or equivalent.
(d) Using several steps, install and tighten the 8 bolts uni- formly in the sequence shown in the illustration.
(e) Fix the crankshaft with SST.
Torque: 88 N m (897 kgf cm, 65 ft lbf)