2001 TOYOTA HIGHLANDER compression ratio
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141P2-01
A94204
Timing Marks
Groove
Timing Marks
A53043
No. 1 Cylinder TDC/Compression
EX
IN
A52469
14-6
- ENGINE MECHANICALVALVE CLEARANCE (2AZ-FE)
2499 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
VALVE CLEARANCE (2AZ-FE)
ADJUSTMENT
1. REMOVE FRONT WHEEL RH
2. REMOVE FRONT FENDER SPLASH SHIELD FRONT RH
3. REMOVE FRONT FENDER APRON SEAL RH
4. REMOVE ENGINE COVER SUB-ASSY NO.1
5. REMOVE IGNITION COIL ASSY
6. REMOVE SPARK PLUG
7. DISCONNECT VENTILATION HOSE
8. DISCONNECT VENTILATION HOSE NO.2
9. REMOVE CYLINDER HEAD COVER SUB-ASSY
(a) Remove the bolt and disconnect the engine wire harness
clamp.
(b) Remove the 8 bolts, 2 nuts, cylinder head cover and gas-
ket.
10. SET NO. 1 CYLINDER TO TDC/COMPRESSION
(a) Turn the crankshaft pulley, and align its groove with timing
mark 0 of the timing chain cover.
(b) Check that the timing marks of the camshaft timing gear
and sprocket are aligned with the timing marks of the
bearing cap No. 1 and No. 2 as shown in the illustration.
11. INSPECT VALVE CLEARANCE
HINT:
Inspect and adjust the valve clearance when the engine is cold.
(a) Check only the valve indicated on the left.
(1) Using a feeler gauge, measure the clearance be-
tween the valve lifter and camshaft.
(2) Record valve clearance measurements that are out
of the specified range. These measurements will be
used later to determine the size of the adjustment
shim to be installed.
Page 1721 of 2572
A90871
Crankshaft Position Sensor
(36-2 teeth or 12 teeth)ECM
Camshaft Position Sensor
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-147
337 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)DTC No.
DTC Detection ConditionTrouble Area
P0300Misfiring of random cylinders is detected
Open or short in engine wire
Connector connection
Vacuum hose connection
Ignition system
Injector
Fuel pressure
MAF meter
ECT sensor
Compression pressure
Valve clearance
Valve timing
PCV hose connection
PCV hose
ECM
P0301
P0302
Misfiring of each cylinder is detectedSame as DTC No P0300P0302
P0303
P0304Misfiring of each cylinder is detectedSame as DTC No. P0300
HINT:
When several codes for a misfiring cylinder are recorded repeatedly but no random misfire code is recorded,
the misfires have been detected and recorded at different times.
MONITOR DESCRIPTION
The ECM illuminates the MIL (2 trip detection logic) if:
The misfiring rate exceeds a threshold value and could cause emission deterioration.
During the first 1,000 engine revolutions after the engine starts, an excessive misfire rate (approxi-
mately 20 to 50 misfires per 1,000 engine revolutions) occurs 1 time.
After the first 1,000 engine revolutions after the engine starts, an excessive misfire rate (approximately
20 to 50 misfires per 1,000 engine revolutions) occurs 4 times.
The ECM blinks the MIL (MIL blinks immediately) if:
Within 200 engine revolutions at a high rpm, the threshold for ºpercentage of misfire causing catalyst
damageº is reached 1 time.
Within 200 engine revolutions at a normal rpm, the threshold for ºpercentage of misfire causing catalyst
damageº is reached 3 times. (for the 2nd trip, reaching the threshold once will cause the MIL to flash)
Page 2177 of 2572
A01037
- ENGINE MECHANICALENGINE (2AZ-FE)
14-3
2496 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
9. INSPECT COMPRESSION
(a) Warm up and stop the engine.
(b) Disconnect the injector connectors.
(c) Remove the ignition coils.
(d) Remove the spark plugs.
(e) Check the cylinder compression pressure.
(1) Insert a compression gauge into the spark plug
hole.
(2) Fully open the throttle.
(3) While cranking the engine, measure the compres-
sion pressure.
Compression pressure:
1,360 kPa (13.9 kgf/cm
2, 198 psi)
Minimum pressure: 0.98 MPa (10 kgf/cm
2, 142 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 as quickly as pos-
sible.
(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 stuck or seated im-
properly, or there may be leakage in the gasket.
10. INSPECT CO/HC
(a) Start the engine.
(b) Rev 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 tailpipe during idling.
(d) Immediately check CO/HC concentration at idle and/or 2,500 rpm.
HINT:
Complete the measuring within 3 minutes.
Check regulations and restrictions in your area when performing 2 mode CO/HC concentration testing
(engine check at both idle speed and at 2,500 rpm).
(e) If the CO/HC concentration does not comply with regulations, troubleshoot in the order given below.
(1) Check A/F sensor operation (see page 12-3).
(2) See the table below for possible causes, and then inspect and repair.
Page 2229 of 2572
D25532
- INTRODUCTIONREPAIR INSTRUCTION
01-19
19 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
(c) MEASURING POINTS FOR ON-VEHICLE BALANCER
(1) Jack up all 4 wheels with 2 post lifts.
(2) Fasten the vehicle by setting 2 pick-up stands in the
bottom of suspension arm's tip of the front wheels
or rear wheels to be measured.
(3) Support the vehicle with rigid racks so that vehicle
will not lean in the vehicle's front/rear direction.
(4) Release the parking brake.
(5) Check that no dragging force exists by turning each
wheel by hand.
(6) Set the wheel balancers.
(7) Measurement should be done by using both of en-
gine drive and wheel balancer roller drive.
NOTICE:
Start the engine, and then increase the vehicle speed
gradually in the D range.
Do not accelerate nor decelerate suddenly.
Deceleration should be done by brake gradually.
Take special care that the vehicle does not move.
Measurement should be done quickly.
10. FOR VEHICLES EQUIPPED WITH CATALYTIC CONVERTER
CAUTION:
If a large amount of unburned gasoline or gasoline vapors flow into the converter, it may cause ove-
heating and create a fire hazard. To prevent this, observe the following precautions.
(a) Use only unleaded gasoline.
(b) Avoid prolonged idling.
Avoid idling the engine for more than 20 minutes.
(c) Avoid a spark jump test.
(1) Perform a spark jump test only when absolutely necessary. Perform this test as rapidly as pos-
sible.
(2) While testing, never race the engine.
(d) Avoid a prolonged engine compression measurement.
Engine compression measurements must be performed as rapidly as possible.
(e) Do not run the engine when the fuel tank is nearly empty. This may cause the engine to misfire and
create an extra load on the converter.
Page 2385 of 2572
051ZK-13
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-31
221 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
PROBLEM SYMPTOMS TABLE
SymptomSuspected AreaSee Page
Engine does not crank (does not start)
1. Starter
2. STARTER relay
3. PNP switch19-12
19-12
40-6
No initial combustion (does not start)
1. ECM power source circuit
2. Fuel pump control circuit
3. ECM05-312
05-349
01-36
No complete combustion (does not start)1. Fuel pump control circuit05-349
Difficult to start (engine cranks normally)
1. Starter signal circuit
2. Fuel pump control circuit
3. Compression05-235
05-349
14-1
Difficult to start with cold engine1. Starter signal circuit
2. Fuel pump control circuit05-235
05-349
Difficult to start with hot engine1. Starter signal circuit
2. Fuel pump control circuit05-235
05-349
High engine idle speed (poor idling)1. A/C signal circuit (Compressor circuit)
2. ECM power source circuit05-1 190
05-312
Low engine idle speed (poor idling)1. A/C signal circuit (Compressor circuit)
2. Fuel pump control circuit05-1 190
05-349
Rough idling (poor idling)1. Compression
2. Fuel pump control circuit14-1
05-349
Hunting (poor idling)1. ECM power source circuit
2. Fuel pump control circuit05-312
05-349
Hesitation/Poor acceleration (poor driveability)1. Fuel pump control circuit
2. A/T faulty05-349
05-904
Surging (poor driveability)1. Fuel pump control circuit05-349
Engine stalls soon after starting1. Fuel pump control circuit05-349
Engine stalls during A/C operation1. A/C signal circuit (Compressor circuit)
2. ECM05-1 190
01-36
Unable to refuel/Difficult to refuel1. ORVR system