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 4 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 plug when checking it.
      
   2. If the ignition coil has been struck or dropped, replace it.
      
   3. Do not crank the engine for more than 2 seconds.
      

Spark test flowchart.

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

      Result:

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

4. Check the resistance of the camshaft position sensor.
   

   Standard resistance:

   Temperature	Specified Condition
   Cold	835 to 1,400 Ω
   Hot	1,060 to 1,645 Ω

   Result:

   Result	Proceed to
   NG	Replace camshaft position sensor
   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 coil.

Torque:

9.0 N*m{92 kgf*cm, 80 in.*lbf}

Check the electrode with a megohmmeter.

1. Measure the insulation resistance.
   

   Standard insulation resistance:

   10 MΩ or more
   

Alternative inspection method (when megohmmeter is not available):

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

Recommended spark plug:

Manufacturer	Product
DENSO	K20HR-U11

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.

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/cm², 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.