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
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.
