On-Vehicle Inspection

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. 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 Fuel Delivery Pipe Connectors And Wire Harness Locks Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Ground the spark plug.
6. Visually check that spark occurs 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.
     Fig 3: Checking Spark Plugs Spark

     Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   If spark does not occur, perform the following procedure

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

   Result 

   RESULT CHART
   
   

   Result	Action
   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 spark does not occur, replace its ignition coil with the ignition coil of a cylinder where spark occurs normally
   2. Crank the engine and visually check that spark occurs at the cylinder with the normally operating ignition coil

      Result 

      RESULT CHART
      
      

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

3. Inspect the spark plug.

   Result 

   RESULT CHART
   
   

   Result	Action
   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.

      Standard Voltage 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Condition	Standard Voltage
      1 (+B) - 4 (GND)	Engine switch on (IG)	11 to 14 V

      Result 

      RESULT CHART
      
      

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

      Fig 4: Identifying ECM Connector Terminal

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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 CRANKSHAFT POSITION SENSOR  )
8. Check the IGT signal circuit (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" 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: 21 N*m (214 kgf*cm, 15 ft.*lbf) 

HINT

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

Fig 5: Locating Connectors With Wire Harness Locks To Injector Drivers

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 alternative inspection method instead.

   Fig 7: Measuring Insulation Resistance

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Quickly accelerate the engine to 4000 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 Spark Plug Electrode Gap

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Recommended Spark Plug 

Fig 9: Identifying Damage Spark Plug And Correct Spark Plug Condition

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT.

Maximum electrode gap for a used spark plug. 1.4 mm (0.0551 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 (0.0394 to 0 0433 in)

Fig 10: Identifying Spark Plug Electrode Gap Clearance

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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 (6.0 kgf/cm ²  , 85 psi) 

Standard duration: 20 seconds or less 

Fig 11: Cleaning Spark Plug

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