On-Vehicle Inspection

1. Remove the ignition coils. Refer to 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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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: Disconnecting Connectors With Wire Harness Locks

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
6. Ground the spark plug.
   Fig 3: Checking Spark Plugs For Spark

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
7. Visually check that sparks occur while the engine is being cranked.
   NOTE:

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

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

3. Inspect the spark plug.

   Result

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

5. Check the VVT sensor. Refer to ON-VEHICLE INSPECTION .
6. Check the camshaft position sensor. Refer to ON-VEHICLE INSPECTION .
7. Check the crankshaft position sensor. Refer to ON-VEHICLE INSPECTION .
8. Check the IGT signal circuit. Refer to 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" Primary / Secondary Circuit; DTC P0356: Ignition Coil "F" Primary / Secondary Circuit; DTC P0357: Ignition Coil "G" Primary / Secondary Circuit; DTC P0358: Ignition Coil "H" Primary / Secondary Circuit .

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

Fig 4: Connecting Connectors With Wire Harness Locks

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT: 

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

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.

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 8: Identifying Damage Spark Plug And Correct Spark Plug Condition

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Recommended spark plug

HINT: 

Fig 9: Identifying Electrode Gap

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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.)

NOTE:

Fig 10: Cleaning Electrode With Spark Plug Cleaner

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Never attempt to adjust the gap of a used plug.

If the electrode has traces of wet carbon, allow it to dry and then clean it with a spark plug cleaner.

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.