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).

PERFORM SPARK TEST

Check for DTCs.
NOTE: If a DTC is present, perform troubleshooting procedures for that DTC.
Check if sparks occur.
1. Remove the ignition coil.
2. Remove the spark plug.
3. Install the spark plug 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:
  - Be sure to ground the spark plug when checking it.
  - 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 REFERENCE

Result	Proceed to
NG	Connect 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 REFERENCE

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

Check the power supply to ignition coil with igniter.

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

Result

RESULT REFERENCE

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

Check resistance of camshaft position sensor.

Standard resistance

RESISTANCE 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

Check resistance of crankshaft position sensor.

Standard resistance

RESISTANCE REFERENCE

Temperature	Specified Condition
Cold	835 to 1,400Ω
Hot	1,060 to 1.645Ω

Result

RESULT REFERENCE

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

Check IGT signal from ECM.

Result

RESULT REFERENCE

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

Using a 16 mm plug wrench, install the spark plug.
Torque: 18 N*m (183 kgf*cm, 13 ft.*lbf)
Install the ignition coil.

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 megohmmeter, measure the insulation resistance.
  Insulation resistance:
  
  10 MΩ or more
  
  HINT:
  
  If a megohmmeter is not available, perform the following simple inspection instead.
Fig 1: Measuring Insulation Resistance
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.
Fig 2: Checking Spark Plug
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	Product
DENSO	SK20R11
NGK	IFR6A11

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.)

NOTE: If 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 plug.

Fig 3: Identifying Spark Plug Gap