On-Vehicle Inspection

NOTE: In this 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).

PERFORM SPARK TEST

Check for DTCs.
NOTE: If a DTC is present, perform troubleshooting procedures for that DTC.
Check if spark occurs.
1. Remove the ignition coil.
2. Remove the spark plug.
3. Install the spark plugs to the ignition coil and connect the ignition coil connector.
4. Disconnect the 8 injector connectors.
5. Ground the spark plug.
6. Visually check that sparks occur while the engine is being cranked.
NOTE: To prevent gasoline from being injected from injectors during this test, crank the engine 5 to 10 seconds at a time.
- Be sure to ground the spark plug when checking.
- If the ignition coil has been struck or dropped, replace it.
- Do not crank the engine for more than 2 seconds.

Perform the spark test according to the flowchart below.

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

Result

RESULT CHART

Result	Proceed to
NG	Connect connector securely.
OK	Go to next step

Perform a spark test on each ignition coil with igniter.

Replace the ignition coil with igniter with a normal one.
Perform the spark test again.

Result

RESULT CHART

Result	Proceed to
OK	Replace ignition coil with igniter.
NG	Go to next step

Check the power supply to the ignition coil with igniter.

Turn the ignition switch ON.
Check that there is battery voltage at the ignition coil positive (+) terminal.

Result

RESULT CHART

Result	Proceed to
NG	Check wiring between engine switch and ignition coil with igniter.
OK	Go to next step

Check the resistance of the camshaft position sensor.

Standard resistance

TEMPERATURE SPECIFIED CONDITION CHART

Temperature	Specified Condition
Cold	1,630 to 2,740 Ω
Hot	2,065 to 3,225 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

TEMPERATURE SPECIFIED CONDITION CHART

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

Result

RESULT CHART

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

Check IGT signal from the ECM.

Result

RESULT CHART

Result	Proceed to
NG	Check ECM
OK	Repair wiring between ignition coil and ECM.

Using a 16 mm plug wrench, install the 8 spark plugs.
Torque: 17.5 N*m (178 kgf*cm, 13 ft.*lbf)
Install the ignition coil with the bolt.

Torque: 7.5 N*m (76 kgf*cm, 66 in.*lbf)

CHECK SPARK PLUG

NOTE:

Do not use a wire brush for cleaning.
Do not attempt to adjust the electrode gap of a used spark plug.

Check the electrode.
1. Using a mega ohmmeter, measure the insulation resistance.
  
  Fig 1: Measuring Insulation Resistance Using Mega Ohmmeter
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Insulation resistance: 10 MΩ or more
  
  HINT:
  
  If a mega ohmmeter is not available, perform the following simple inspection instead.
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.
Fig 2: Identifying Damage Spark Plug Area
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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

Recommended spark plug

SPARK PLUG SPECIFICATION

Manufacturer	Spark Plug Type
DENSO	SK20R11
NGK	IFR6A11

Check the spark plug electrode gap.

Fig 3: Checking 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.)

NOTE: When adjusting the gap of a new spark plug, bend only the base of the ground electrode. Do not touch the tip. Never attempt to adjust the gap of a used spark plug.