Ignition System On-Vehicle Inspection

Check for DTCs.

NOTICE:

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 6 injector connectors.
   

5. Ground the spark plug.
   

6. Visually check that sparks occur while the engine is being cranked.
   

   NOTICE:

   1. Be sure to ground the spark plugs when checking them.
      
   2. If the ignition coil has been struck or dropped, replace it.
      
   3. Do not crank the engine for more than 2 seconds.
      

Perform the spark test according to the flowchart below.

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

   Result:

   Result	Proceed to
   NG	Connect securely
   OK	Go to next step

2. Perform a spark test on each ignition coil with igniter.
   

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

      Result:

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

3. Check the power supply to the ignition coil with igniter.
   

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

      Result:

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

4. Check the VVT sensor output voltage.
   

   Result:

   Result	Proceed to
   NG	Check that there is resistance between ECM and VVT sensor. If there is no resistance, replace VVT sensor. If there is resistance, repair wiring between VVT sensor and ECM
   OK	Go to next step

5. Check the resistance of the crankshaft position sensor.
   

   Standard resistance:

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

   Result:

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

6. Check the IGT signal from the ECM.
   

   Result:

   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 coils.

Turn the engine switch on (IG).

Check the voltage between the terminal.

Standard voltage:

Tester Connection	Condition	Specified Condition
E8-29 (VC) - Body ground	Engine switch on (IG)	5 V

While turning the crankshaft pulley by hand, measure the voltage between each terminal. Check that the voltage changes between the Hi range and Lo range shown in the table below.

Standard voltage:

Sensor Position	Terminal No.	Voltage (Hi)	Voltage (Lo)
Bank 1	VVT1+ (E8-21) - VVT1- (E8-20)	3.375 to 4.950 V	0.450 to 1.375 V
Bank 2	VVT2+ (E8-19) - VVT2- (E8-18)	3.375 to 4.950 V	0.450 to 1.375 V

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.

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 threads and insulator.

HINT:

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

Recommended spark plug:

DENSO made	FK20HBR11
NGK made	ILFR6D11T

Check the spark plug electrode gap.

Maximum electrode gap for used spark plug:

1.3 mm (0.051 in.)

Electrode gap for new spark plug:

1.0 to 1.1 mm (0.039 to 0.043 in.)

NOTICE:

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 plug.