On-Vehicle Inspection

NOTE: "Cold" and "Hot" in this section mean temperature of the coils themselves. "Cold" is from -10°C (14°F) to 50°C (122°F) and "Hot" is from 50°C (122°F) to 100°C (212°F).

INSPECT IGNITION COIL AND SPARK TEST
1. Check the DTCs.
  NOTE: If a DTC is present, perform troubleshooting in accordance with a procedure for that DTC.
2. Check that a spark occurs.
  1. Remove the 6 ignition coils (see IGNITION COIL ASSY (3MZ-FE) ).
  2. Using a spark plug wrench 16 mm, remove the 6 spark plugs.
    1. Torque: 25 N.m (250 kgf.cm, 18 ft.lbf)
  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.
NOTE:
- 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.

SPARK TEST
NG: Go to next step
CHECK CONNECTION OF IGNITION COIL CONNECTOR
NG CONNECT SECURELY

OK: Go to next step
REPLACE IT WITH NORMAL IGNITION COIL AND PERFORM SPARK TEST AGAIN
OK REPLACE IGNITION COIL ASSY (See IGNITION COIL ASSY (3MZ-FE) )

NG: Go to next step
CHECK POWER SUPPLY TO IGNITION COIL
1. Turn the ignition switch ON.
2. 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: Go to next step
INSPECT VVT SENSOR (See INSPECTION )
NG REPLACE VVT SENSOR (See VVT SENSOR (3MZ-FE) )

OK: Go to next step
INSPECT CRANKSHAFT POSITION SENSOR (See INSPECTION )
NG REPLACE CRANKSHAFT POSITION SENSOR (See CRANKSHAFT POSITION SENSOR (3MZ-FE) )

OK: Go to next step
INSPECT IGT SIGNAL FROM ECM (See TERMINALS OF ECM )
NG REPLACE ECM (See ECM (3MZ-FE) )

OK

REPAIR WIRE HARNESS (BETWEEN IGNITION COIL ASSY AND IGNITION (START) SWITCH ASSY)