On-Vehicle Inspection

Check that the spark occurs.

1. Remove the ignition coils (see COMPONENTS  ).
2. Remove the spark plugs.
3. Install the spark plugs to each ignition coil and connect the ignition coil connector.
4. Disconnect the 4 injector connectors.
5. Ground the spark plug.
6. Check if the spark occurs while the engine is being cranked.
   NOTE: To prevent gasoline from being injected from injectors during this test, crank the engine for no more than 5 - 10 seconds at one time.

   If the spark does not occur, do the test as follows:

   Fig 1: Spark Testing Chart

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
7. Using a 16 mm plug wrench, reinstall the spark plugs.

   Torque: 19 N.m (194 kgf.cm, 14 ft.lbf) 

8. Reinstall the ignition coils (see COMPONENTS  ).

1. Remove the air cleaner assembly.
2. Remove the ignition coils (see COMPONENTS  ).
3. Check the electrode.
   • Using a megger (insulation resistance meter), measure the insulation resistance.
     Fig 2: Measuring Insulation Resistance

     Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

     Correct insulation resistance: 10 MΩ or more 

     If the resistance is less than the specified value, proceed to step (d).

     HINT:

     If a megger is not available, the following simple method of inspection provides fairly accurate results.

   • Simple Method:
     • Quickly race the engine to 4,000 rpm 5 times.
     • Remove the spark plug (see step (d)).
     • Visually check the spark plug.
       Fig 3: Visually Checking Spark Plug Electrode

       Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

       If the electrode is dry ... OK.

       If the electrode is wet... Proceed to step  g.

     • Reinstall the spark plug (see step  h).
4. Using a 16 mm plug wrench, remove the spark plugs.
Fig 4: Removing Spark Plugs
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Check the spark plug for thread damage and insulator damage.

   If abnormal, replace the spark plug.

   Recommended spark plug: 

   SPARK PLUG REFERENCE
   
   

   DENSO made	SK20R11
   NGK made	IFR6A11

6. Check the spark plug electrode gap.
   Fig 5: Checking Spark Plug Electrode Gap

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Maximum electrode gap for used spark plug: 

   1.3 mm (0.047 in.) 

   If the gap is greater than maximum, replace the spark plug.

   Correct electrode gap for new spark plug: 

   1.0 to 1.1 mm (0.039 to 0.043 in.) 

   NOTE: 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 on a used plug.
7. Clean the spark plugs.
   Fig 6: Cleaning Spark Plugs

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Air pressure: Below 588 kPa (6 kgf/cm ²  , 85 psi) 

   Duration: 20 seconds or less 

   HINT:

   If there are traces of oil, wipe them off with gasoline before using the spark plug cleaner.

8. Using a 16 mm plug wrench, install the spark plugs.

   Torque: 19 N.m (194 kgf.cm, 14 ft.lbf) 

9. Reinstall the ignition coils (see COMPONENTS  ).
10. Reinstall the air cleaner assembly.

1. Remove the sensor connector (see CAMSHAFT POSITION SENSOR  ).
2. Using an ohmmeter, measure the resistance between terminals.
   Fig 7: Measuring Resistance Between Camshaft Position Sensor Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Resistance: 

   CAMSHAFT RESISTANCE
   
   

   Cold	835 to 1,400 Ω
   Hot	1,060 to 1,645 Ω

   If the result is not as specified, replace the sensor (see CAMSHAFT POSITION SENSOR  ).

3. Reconnect the sensor connector.

1. Disconnect the sensor connector.
2. Using an ohmmeter, measure the resistance between the terminals.
   Fig 8: Measuring Resistance Between Crankshaft Position Sensor Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Resistance: 

   CRANKSHAFT RESISTANCE
   
   

   Cold	985 to 1,600 Ω
   Hot	1,265 to 1,890 Ω

   If the result is not as specified, replace the sensor (see CRANKSHAFT POSITION SENSOR  ).

3. Reconnect the sensor connector.