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 4 connectors.
   Fig 1: Locating Spark Plug Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Disconnect the 2 injector driver connectors by the following procedures: 1) move the lock lever in the direction indicated by the arrow to release the connector lock, 2) disconnect the connectors with wire harness lock.
6. Ground the spark plug.
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.
   Fig 2: Locating Injector Driver Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Result 

   RESULT REFERENCE CHART
   
   

   Result	Proceed to
   NG	Connect securely
   OK	Go to next step

2. Perform a spark test on each ignition coil with igniter.
   1. Exchange the ignition coil with igniter with a normal one.
   2. Visually check that sparks occur while the engine is being cranked.

      Result 

      RESULT REFERENCE CHART
      
      

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

      Result 

      RESULT REFERENCE CHART
      
      

      Result	Proceed to
      NG	Check wiring between power switch and Ignition coil with Igniter
      OK	Go to next step

4. Check the VVT sensor circuit (see DTC P0340 CAMSHAFT POSITION SENSOR CIRCUIT MALFUNCTION; DTC P0342 CAMSHAFT POSITION SENSOR "A" CIRCUIT LOW INPUT (BANK 1 OR SINGLE SENSOR); DTC P0343 CAMSHAFT POSITION SENSOR "A" CIRCUIT HIGH INPUT (BANK 1 OR SINGLE SENSOR); DTC P0345 CAMSHAFT POSITION SENSOR "A" CIRCUIT (BANK 2); DTC P0347 CAMSHAFT POSITION SENSOR "A" CIRCUIT LOW INPUT (BANK 2); DTC P0348 CAMSHAFT POSITION SENSOR "A" CIRCUIT HIGH INPUT (BANK 2) ).

   Result 

   RESULT REFERENCE CHART
   
   

   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 (see DTC P0340 CAMSHAFT POSITION SENSOR CIRCUIT MALFUNCTION; DTC P0342 CAMSHAFT POSITION SENSOR "A" CIRCUIT LOW INPUT (BANK 1 OR SINGLE SENSOR); DTC P0343 CAMSHAFT POSITION SENSOR "A" CIRCUIT HIGH INPUT (BANK 1 OR SINGLE SENSOR); DTC P0345 CAMSHAFT POSITION SENSOR "A" CIRCUIT (BANK 2); DTC P0347 CAMSHAFT POSITION SENSOR "A" CIRCUIT LOW INPUT (BANK 2); DTC P0348 CAMSHAFT POSITION SENSOR "A" CIRCUIT HIGH INPUT (BANK 2) .
   OK	Go to next step

5. Check the resistance of the crankshaft position sensor.

   Standard resistance 

   TERMINALS RESISTANCE CHART
   
   

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

   Result 

   RESULT REFERENCE CHART
   
   

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

6. 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 ).

Torque: 25 N*m (254 kgf*cm, 18 ft.*lbf) 

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 5: 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 6: Checking Spark Plug

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If there is any damage, replace the spark plug.

Recommended spark plug 

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.) 

Fig 7: Checking Spark Plug Electrode Gap

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard air pressure: 

588 kPa (6 kgf/cm ²  , 85 psi) 

Standard duration: 

20 seconds or less 

Fig 8: 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.