Page 379 of 969
P19471
Compression Gauge
- ENGINE MECHANICALENGINE (3MZ-FE)
14-3
2095 Author: Date:
2005 LEXUS ES330 REPAIR MANUAL (RM1124U)
9. INSPECT COMPRESSION
(a) Warm up and stop the engine.
(b) Remove the intake air surge tank (see page 11-13).
(c) Disconnect the injector connectors.
(d) Remove the ignition coils.
(e) Remove the spark plugs.
(f) Inspect the cylinder compression pressure.
(1) Insert a compression gauge into the spark plug
hole.
SST 09992-00500
(2) Fully open the throttle.
(3) While cranking the engine, measure the compres-
sion pressure.
Compression pressure:
1.5 MPa (15.3 kgf/cm
2, 218 psi)
Minimum pressure:
1.0 MPa (10.2 kgf/cm
2, 145 psi)
Difference between each cylinder:
100 kPa (1.0 kgf/cm
2, 15 psi)
NOTICE:
Always use a fully-charged battery to obtain engine
speed of 250 rpm or more.
Check the 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, then 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, the valve may be sticking or seated
improperly, or there may be leakage past the gasket.
10. INSPECT CO/HC
HINT:
The ECM properly controls the CO/HC concentration in the emission gas.
(a) Start the engine.
(b) Run the engine at 2,500 rpm for approximately 180 seconds.
(c) Insert the CO/HC meter testing probe at least 40 cm (1.3 ft) into the tailpipe during idling.
(d) Check the CO/HC concentration at idle and/or at 2,500 rpm.
HINT:
When doing the 2 mode (with the engine is at idle and at 2,500 rpm) tests, these measuring order are pre-
scribed by the applicable local regulations.
If the CO/HC concentration does not comply with the regulations, troubleshoot in the order given below.
(1) Check the heated oxygen sensor operation (see page 05-126).
Page 697 of 969
1809A-01
- IGNITIONIGNITION SYSTEM (3MZ-FE)
18-1
2326 Author: Date:
2005 LEXUS ES330 REPAIR MANUAL (RM1124U)
IGNITION SYSTEM (3MZ-FE)
ON-VEHICLE INSPECTION
NOTICE:
ºColdº and ºHotº in this section mean temperature of the coils themselves. ºColdº is from -10C
(14F) to 50C (122F) and ºHotº is from 50C (122F) to 100C (212F).
1. INSPECT IGNITION COIL AND SPARK TEST
(a) Check the DTCs.
NOTICE:
If a DTC is present, perform troubleshooting in accordance with a procedure for that DTC.
(b) Check that a spark occurs.
(1) Remove the 6 ignition coils (see page 18-7).
(2) Using a spark plug wrench 16 mm, remove the 6 spark plugs.
Torque: 25 NVm (250 kgfVcm, 18 ftVlbf)
(3) Install the spark plugs to each ignition coil, then connect the ignition coil connectors.
(4) Disconnect the 6 fuel injector connectors.
(5) Ground the spark plugs.
(6) Check that the spark plug occurs at each spark plug while the engine is being cranked.
NOTICE:
Be sure to ground the spark plugs when checking.
Replace the ignition coil if physical impact is felt.
Do not crank the engine for more than 2 seconds.
If a spark does not occur, perform the following test.
1 SPARK TEST
NG
2 CHECK CONNECTION OF IGNITION COIL CONNECTOR
NG CONNECT SECURELY
OK
3 REPLACE IT WITH NORMAL IGNITION COIL AND PERFORM SPARK TEST AGAIN
OK REPLACE IGNITION COIL ASSY
(See page 18-7)
NG
4 CHECK POWER SUPPLY TO IGNITION COIL
(a) Turn the ignition switch ON.
(b) Check that there is battery voltage at the ignition coil positive (+) terminal.
NG CHECK WIRE HARNESS (BETWEEN IGNITION
(START) SWITCH ASSY AND IGNITION COIL
ASSY)
OK
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B62019
A84690
Ohmmeter
A84688
Ohmmeter 18-4
- IGNITIONIGNITION SYSTEM (3MZ-FE)
2329 Author: Date:
2005 LEXUS ES330 REPAIR MANUAL (RM1124U)
(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/cm
2, 85 psi)
Duration: 20 seconds or shorter
If there are traces of oil, remove it with gasoline before using the
spark plug cleaner.
2. INSPECT VVT SENSOR
(a) Inspect the resistance.
(1) Using an ohmmeter, measure the resistance be-
tween the terminals.
Resistance:
Tester ConnectionSpecified Condition
1 (G+) - 2 (G-)835 to 1,400 W at cold
1 (G+) - 2 (G-)1,060 to 1,645 W at hot
NOTICE:
ºColdº and ºHotº mean temperature of the coils them-
selves. ºColdº is from -10C (14F) to 50C (122F) and
ºHotº is from 50C (122F) to 100C (212F).
If the resistance is not as specified, replace the VVT sensor.
3. INSPECT CRANKSHAFT POSITION SENSOR
(a) Inspect the resistance.
(1) Using an ohmmeter, measure the resistance be-
tween the terminals.
Resistance:
Tester ConnectionSpecified Condition
1 (NE+) - 2 (NE-)1,630 to 2,740 W at cold
1 (NE+) - 2 (NE-)2,065 to 3,225 W at hot
NOTICE:
ºColdº and ºHotº mean temperature of the coils them-
selves. ºColdº is from -10C (14F) to 50C (122F) and
ºHotº is from 50C (122F) to 100C (212F).
If the resistance is not as specified, replace the crankshaft posi-
tion sensor.