On-Vehicle Inspection

NOTE: In this step, 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).

PERFORM SPARK TEST

Check for DTCs (see TERMINALS OF ECM ).
NOTE: If a DTC is present, perform troubleshooting in accordance with the procedure for that DTC.
Check that sparks occur.
1. Remove the ignition coil (see REMOVAL ).
2. Disconnect the 4 fuel injector connectors.
  
  Fig 1: Disconnecting Fuel Injector Connectors
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. 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
4. Install each spark plug into an ignition coil, then connect the ignition coil connectors.
5. Ground the spark plug.
6. Check that sparks occur at each spark plug while the engine is being cranked.
  NOTE:
  - Be sure to ground the spark plugs when checking them.
  - If the ignition coil has been struck or dropped, replace it.
  - Do not crank the engine for more than 2 seconds.
  If sparks do not occur, perform the following procedure.
  
  Fig 3: Checking Spark Occurrence
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Spark test flow chart.

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

Result

RESULT CHART (1 OF 2)

Result	Proceed to
NG	Connect securely
OK	Go to next step

Perform the spark test on each ignition coil.

Replace the ignition coil with a normal one.

Perform the spark test again.

Result

RESULT CHART (2 OF 2)

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

Check 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

VOLTAGE TESTER CONNECTION SPECIFICATION

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

Result

RESULT CHART

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 Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Check the resistance of the camshaft position sensor.

Standard resistance

RESISTANCE TESTER CONNECTION SPECIFICATION

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

Result

RESULT CHART

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

Check the resistance of the crankshaft position sensor.

Standard resistance

RESISTANCE TESTER CONNECTION SPECIFICATION

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

Result

RESULT CHART (1 OF 2)

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

Check IGT signal from the ECM.

Result

RESULT CHART (2 OF 2)

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

CHECK SPARK PLUG

Check the electrode.
1. Using a megohmmeter, measure the insulation resistance.
  Standard insulation resistance: 10 MΩ or more
  
  HINT:
  - If a megohmmeter is not available, perform the following simple inspection instead.
  - If the result is 10 MΩ or less, clean the plug and measure the resistance again.
    
    Fig 5: Checking Spark Plug
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Alternative inspection method:
1. Quickly accelerate the engine to 4,000 rpm 5 times.
2. Remove the spark plug.
3. Visually check the spark plug.
  If the electrode is dry, the spark plug is functioning properly. If the electrode is damp, proceed to the next step.

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

If there is damage, replace the spark plug.

Fig 6: Identifying Spark Plug For Damage On Thread & Insulator

Recommended spark plug

RECOMMENDED SPARK PLUG AND MANUFACTURER PRODUCT

Manufacturer	Product
DENSO	SK16R11
NGK	IFR5A11

Check the spark plug electrode gap.
Maximum electrode gap for used spark plug: 1.3 mm (0.051 in.)

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

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

Fig 7: Checking Spark Plug Electrode Gap
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.

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

Standard duration: 20 seconds or less

HINT:

Only use the spark plug cleaner when the electrode is free of oil. If the electrode has traces of oil, use gasoline to clean off the oil before using the spark plug cleaner.

Fig 8: Cleaning Spark Plugs
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002