On-Vehicle Inspection

NOTE: In this section, 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).

INSPECT IGNITION COIL ASSEMBLY AND SPARK TEST

Check for 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: Removing Fuel Injector Connectors
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Using a 16 mm plug wrench, remove the 4 spark plugs.
  Torque: 18 N*m (184 kgf*cm, 13 ft.*lbf)
  
  Fig 2: Removing Spark Plugs
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Install each spark plug into an ignition coil, 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.
  
  Fig 3: Checking Spark From Spark Plugs
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  NOTE:
  - Be sure to ground the spark plugs when checking.
  - If the ignition coil has been struck or dropped, replace it.
  - Do not crank the engine for more than 2 seconds.
  If spark do not occur, perform the following procedure.

Spark test flow chart.

Check that the wire harness side connector of the ignition coil is securely connected.

Result

RESULT DETAIL

Result	Proceed to
NG	Connect securely
OK	Go to next step

Perform the spark test on each ignition coil.

Replace ignition coil with a normal one.

Perform spark test again.

Result

RESULT DETAIL

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.

Using a voltmeter, measure the voltage between the terminals.

Standard voltage

TERMINALS VOLTAGE SPECIFICATION

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

Result

RESULT DETAIL

Result	Proceed to
NG	Check wire harness and connector (Between power switch and ignition coil assembly)
OK	Go to next step

Fig 4: Measuring Voltage Between Ignition Coil Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Check the resistance of the camshaft position sensor.

Standard resistance

TERMINALS RESISTANCE SPECIFICATION

Temperature	Specified Condition
Cold	1,630 to 2,740 Ω
Hot	1,060 to 1,645 Ω

Result

RESULT DETAIL

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

Check the resistance of the crankshaft position sensor.

Standard resistance

TERMINALS RESISTANCE SPECIFICATION

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

Result

RESULT DETAIL

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

Check the IGT signal from the ECM.

Result

RESULT DETAIL

Result	Proceed to
NG	Replace ECM
OK	Repair wire harness or connector (Between ignition coil assembly and ignition switch)

INSPECT SPARK PLUG

Remove the IGNITION COIL .
Using a 16 mm plug wrench, remove the 4 spark plugs.

Fig 5: Removing Spark Plug
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Clean the spark plugs.
If the electrode has traces of wet carbon, clean the electrode with a spark plug cleaner and then dry it.

Fig 6: Cleaning Electrode With Spark Plug Cleaner
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard air pressure: 588 kPa (6 kgf/cm ² , 85 psi)

Standard duration: 20 seconds or less

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

If there is damage, replace the spark plug. If not, reinstall the spark plug.

Recommended spark plug

RECOMMENDED SPARK PLUG

Manufacturer	Product
DENSO	K16R-U
NGK	BKR5EYA

Fig 7: Inspecting Spark Plug

Inspect and adjust the electrode gap.

Fig 8: Adjusting Electrode Gap
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard electrode gap: 0.7 to 0.8 mm (0.028 to 0.031 in.)
Using a 16 mm plug wrench, install the 4 spark plugs.
Torque: 18 N*m (184 kgf*cm, 13 ft.*lbf)
Install the IGNITION COIL .