On-Vehicle Inspection

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

INSPECT IGNITION COIL ASSEMBLY

Check for DTCs.
NOTE: If any DTC is present, perform troubleshooting in accordance with the procedures for that DTC.
Check that sparks occur.
1. Remove the intake air surge tank (See REMOVAL ).
2. Remove the No. 1 surge tank stay (see REMOVAL ).
3. Disconnect the 6 ignition coil connectors and remove the 6 bolts and 6 ignition coils.
  
  Fig 1: Locating Ignition Coil Connectors
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Using a 16 mm (0.63 in.) plug wrench, remove the 6 spark plugs.
  
  Fig 2: Identifying Spark Plugs
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Disconnect the 6 fuel injector connectors.
6. Install the spark plugs to each ignition coil, and connect the ignition coil connectors.
  
  Fig 3: Locating Fuel Injector Connectors
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
7. Ground the spark plugs.
8. Check if 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 it receives an impact.
  - Do not crank the engine for more than 2 seconds.
    
    Fig 4: Checking Ground Spark Plugs
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Perform the spark test according to the flowchart below.

Check that the ignition coil connector is securely connected.

Result

RESULT REFERENCE

Result	Proceed to
NG	Connect securely
OK	Go to Next Step

Perform a speak 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.

Turn the engine switch on (IG).

Measure the voltage between the terminals of the wire harness side connector.

Standard voltage

STANDARD VOLTAGE SPECIFICATION

Tester Connection	Specified Condition
1 (+B) - 4 (GND)	9 to 14 V

Result

RESULT REFERENCE

Result	Proceed to
NG	Check wiring between engine switch and ignition coil
OK	Go to Next Step

Measure the resistance of the crankshaft position sensor.

Fig 5: Measuring Voltage Between Terminals Of Wire Harness Side Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard resistance

STANDARD RESISTANCE SPECIFICATION

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

Result

RESULT REFERENCE

Result	Proceed to
NG	Replace crankshaft position sensor
OK	Go to Next Step

Check the IGT signal from the ECM.

Result

RESULT REFERENCE

Result	Proceed to
NG	Check ECM (See DTC P0351 IGNITION COIL "A" PRIMARY / SECONDARY CIRCUIT; DTC P0352 IGNITION COIL "B" PRIMARY / SECONDARY CIRCUIT; DTC P0353 IGNITION COIL "C" PRIMARY / SECONDARY CIRCUIT; DTC P0354 IGNITION COIL "D" PRIMARY / SECONDARY CIRCUIT; DTC P0355 IGNITION COIL "E" )
OK	Repair wiring between ignition coil and ECM

Using a 16 mm (0.63 in.) plug wrench, install the spark plugs.
Torque: 18 N*m (184 kgf*cm, 13 ft.*lbf)

Fig 6: Identifying Spark Plugs
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Install the 6 ignition coils with the 6 bolts and connect the 6 ignition coil connectors.
Torque: 10 N*m (102 kgf*cm, 7 ft.*lbf)

Fig 7: Locating Ignition Coil Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Connect the 6 fuel injector connectors.
Install the No. 1 surge tank stay (See INSTALLATION ).
Install the intake air surge tank (See INSTALLATION ).

INSPECT SPARK PLUG

NOTE:

Never use a wire brush for cleaning.
Never attempt to adjust the electrode gap on a used spark plug.

Fig 8: Locating Fuel Injector Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Check the electrode.
1. Using a megohmmeter, measure the insulation resistance.
  Standard insulation resistance: 10 MΩ or higher
  
  HINT:
  - If the result is 10 MD or less, clean the plug and measure the resistance again.
  - If a megohmmeter is not available, perform the following simple inspection instead.
    
    Fig 9: 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 plugs.
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 to its threads and insulator. If there is damage, replace the spark plug.

Require spark plug

REQUIRE SPARK PLUG

Manufacturer	Spark plug type
DENSO made	FK20HR11

NOTE: Use only the listed spark plug or equivalent to ensure engine performance and smooth driveability.

Check the spark plug electrode gap.
Maximum electrode gap for a used spark plug: 1.4 mm (0.055 in.)

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

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

Fig 10: Identifying 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

Fig 11: Cleaning Spark Plugs
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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.