On-Vehicle Inspection

INSPECT IGNITION COIL ASSEMBLY AND SPARK TEST

NOTE: In this service information, the terms "cold" and "hot" refer to the temperature of the coils . "Cold" means approximately - 10 to 50°C (14 to 122°F). "Hot" means approximately 50 to 100°C (122 to 212°F).

Check the DTCs.
NOTE: If a DTC is present, perform troubleshooting in accordance with the procedure for that DTC.
Check that sparks occur.
1. Remove the No. 1 engine cover.
2. Remove the ignition coil.
3. Disconnect the 4 fuel injector connectors.
  
  Fig 1: Locating Fuel Injector Connectors
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Using a 16 mm spark plug wrench, remove the 4 sparkplugs.
  Torque: 19 N*m (195 kgf*cm, 14 ft.*lbf)
  
  Fig 2: Locating Spark Plugs
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Install each spark plug into an ignition coil, and then connect the ignition coil connectors.
6. Ground the spark plugs.
7. Check that a spark 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 a physical impact is felt while holding the spark plug.
  - Do not crank the engine for more than 2 seconds.
  If spark do not occur, perform the following procedures.

Perform the spark test according to the flowchart below.

Perform spark test on each ignition coil.

Replace the ignition coil with a normal one.

Perform the spark test again.

Result

RESULT REFERENCE

Result	Proceed to
OK	Replace ignition coil
NG	Go to next step

Check the power supply to the ignition coil.

Disconnect the ignition coil connector.
Turn the ignition switch ON.

Measure the voltage of the wire harness side connector.

Fig 4: Measuring Voltage Of Wire Harness Side Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard resistance

STANDARD RESISTANCE REFERENCE

Tester Connection	Specified Condition
1 (+B) - 4 (GND)	9.0 to 14 V

Result

RESULT REFERENCE

Result	Proceed to
NG	Check wire harness and connector
OK	Go to next step

Measure the resistance of the camshaft position sensor.

Result

RESULT REFERENCE

Temperature	Specified Condition
Cold	835 to 1,400 Ω
Hot	1,060 to 1,645 Ω

Result

RESULT REFERENCE

Result	Proceed to
NG	Replace camshaft position sensor
OK	Go to next step

Measure the resistance of the crankshaft position sensor.

Result

RESULT REFERENCE

Temperature	Specified Condition
Cold	985 to 1,600 Ω
Hot	1,265 to 1,890 Ω

Result

RESULT REFERENCE

Result	Proceed to
NG	Replace crankshaft position sensor
OK	Go to next step

Check IGT signal from the ECM.

Result

RESULT REFERENCE

Result	Proceed to
NG	Replace ECM
OK	Repair wire harness or connector

INSPECT SPARK PLUG

Check the appearance.

Check the spark plug for any damage on its thread and insulator.

If there is any damage, replace the spark plug.

Fig 5: Identifying Spark Plug Electrode

Recommended spark plug:

SPARK PLUG SPECIFICATION

Manufacturer	Product
DENSO	SK20R11
NGK	IFR6A11

Check the electrode gap.
Standard electrode gap:

1.0 to 1.1 mm (0.039 to 0.043 in.) for new spark plug

Maximum electrode gap:

1.3 mm (0.051 in.) for used spark plug

If the electrode gap is greater than the maximum, replace the spark plug.

Fig 6: Checking Electrode Gap
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002