On-Vehicle Inspection

1. Remove the ignition coils (see REMOVAL  ).
2. Remove the spark plugs.
3. Install the spark plug to the ignition coil and connect the ignition coil connector.
4. Disconnect the 2 fuel delivery pipe connectors.
   Fig 1: Locating Fuel Delivery Pipe Connectors

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5. Disconnect the 4 connectors with wire harness locks from the 2 injector drivers.

   HINT:

   To release each connector lock, push the claw downward ("Release" in the illustration) and move the lock lever ("Move" in the illustration).

   Fig 2: Locating Wire Harness Locks And Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
6. Ground the spark plug.
7. Visually check that sparks occur while the engine is being cranked.

Fig 3: Grounding Spark Plug

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

   Result 

   RESULT CHART
   
   

   Result	Proceed to
   NG	Connect securely
   OK	Go to next step

2. Perform a spark test on each ignition coil with igniter.
   1. If there is a cylinder where sparks do not occur, replace its ignition coil with the ignition coil of a cylinder where sparks occur normally.
   2. Crank the engine and visually check that sparks occur at the cylinder with the normally operating ignition coil.

      Result 

      RESULT CHART
      
      

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

3. Inspect the spark plug.

   Result 

   RESULT CHART
   
   

   Result	Proceed to
   NG	Replace spark plug
   OK	Go to next step

4. Check the power supply to the ignition coil with igniter.
   1. Turn the engine switch on (IG).
   2. 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

5. Check the VVT sensor (see ON-VEHICLE INSPECTION ).
6. Check the camshaft position sensor (see ON-VEHICLE INSPECTION ).
7. Check the crankshaft position sensor (see ON-VEHICLE INSPECTION ).
8. Check the IGT signal circuit (see DESCRIPTION ).

Torque: 18 N*m (184 kgf*cm, 13 ft.*lbf) 

HINT:

Move the lock lever in the direction indicated by the arrow to lock the connector.

Fig 4: Locating Wire Harness Locks And Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Using a megohmmeter, measure the insulation resistance.

   Standard insulation resistance: 10 MΩ or more 

   HINT:

   If a megohmmeter is not available, perform the following simple inspection instead.

   Fig 6: Measuring Insulation Resistance

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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 7: Checking Spark Plug

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

Recommended spark plug 

Fig 8: Checking Spark Plug

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HINT:

Maximum electrode gap for a used spark plug: 1.3 mm (0.051 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 9: Identifying Electrode Gap

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