On-Vehicle Inspection

NOTE: "Cold" and "Hot" in these sentences express the temperature of the coils themselves. "Cold" is from -10 °C (14°F) to 50°C (122°F) and "Hot" is from 50°C (122°F) to 100°C (212°F).

INSPECT IGNITION COIL (WITH IGNITER) AND SPARK TEST
1. Check that the spark occurs.
2. Remove the ignition coils (with igniter) (See REMOVAL ).
3. Remove the spark plugs.
4. Install the spark plugs to each ignition coil (with igniter), and connect the ignition coil (with igniter) connector.
5. Disconnect the 8 injector connectors.
6. Ground the spark plug.
7. Check that spark occurs while engine is being cranked.
  NOTE: To prevent excess fuel from being injected out of the injectors during this test, do not crank the engine for more 5-10 seconds at a time. If the spark does not occur, do the test as follows:
  
  Fig 1: Spark Plug Testing Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT HIGH-TENSION CORDS
1. Remove the air cleaner cap and MAF meter assembly.
2. Disconnect the high-tension cords from the spark plugs. Disconnect the high-tension cords at the rubber boot. Do not pull on the cords.
  NOTE: Pulling on or bending the cords may damage the conductor inside.
  
  Fig 2: Disconnecting High Tension Cord From Spark Plugs
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Disconnect the high-tension cords from the ignition coils.
  1. Using a screwdriver, lift up the lock claw and disconnect the holder from the ignition coils.
  2. Disconnect the high-tension cord at the grommet. Do not pull on the cord.
    NOTE: Pulling on or bending the cords may damage the conductor inside. Do not wipe any of the oil from the grommet after the high-tension cord is disconnected.
    
    Fig 3: Disconnecting High Tension Cord At Grommet
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Inspect the high-tension cord resistance. Using an ohmmeter, measure the resistance.
  Maximum resistance: 25 kΩ per cord
  
  If the resistance is greater than maximum, check the terminals. If necessary, replace the high-tension cord.
  
  Fig 4: Measuring High-Tension Cord Resistance
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Reconnect the high-tension cords to ignition coils.
  
  Fig 5: Connecting High Tension Cord To Ignition Coils
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. Assemble the holder and grommet.
  2. Align the spline of the ignition coil with the spline of the holder, and push in the cord.
    
    Fig 6: Align Spline Of Ignition Coil with Spline Of Holder
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    NOTE: Check that the holder is correctly installed to the grommet and distributor cap as shown in Fig 7.
  3. Check that the lock claw of the holder is engaged by lightly pulling the holder.
6. Reconnect the high-tension cords to spark plugs.
7. Reinstall the air cleaner cap and MAF meter assembly.
  
  Fig 7: Checking Installation Of Holder To Grommet And Distributor Cap
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT SPARK PLUGS

Remove the high-tension cords.
Remove the spark plugs.
Using a 16 mm plug wrench, remove the 6 spark plugs from the RH and LH cylinder heads.

Fig 8: Removing Spark Plugs
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Clean the spark plugs.
If the electrode has traces of wet carbon, allow it to dry and then clean 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, remove it with gasoline before using the spark plug cleaner.

Fig 9: Cleaning Spark Plugs
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Visually inspect the spark plugs.

Check the spark plug for thread damage and insulator damage.

If abnormal, replace the spark plug.

Recommended spark plug:

RECOMMENDED SPARK PLUG

Brand	Part No.
DENSO made	K16TR11
NGK made	BKR5EKB-11

Fig 10: Visually Inspecting Spark Plug

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Adjust the electrode gap.
Carefully bend the outer electrode to obtain the correct electrode gap.

Correct electrode gap: 1.1 mm (0.043 in.)

Fig 11: Adjusting Electrode Gap
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Reinstall the spark plugs.
Torque: 20 N.m (200 kgf.cm, 14 ft.lbf)
Reinstall the ignition coils. (See REMOVAL )
Reconnect the high-tension cords.

INSPECT IGNITION COIL

Remove the air cleaner hose.
Disconnect the high-tension cords from the ignition coils.
Disconnect the ignition coil connectors.

Inspect the primary coil resistance.

Using an ohmmeter, measure the resistance between the positive (+) and negative (-) terminals.

Primary coil resistance:

PRIMARY COIL RESISTANCE

Condition	Specification
Cold	0.67 - 1.05 Ω
Hot	0.85 - 1.23 Ω

If the resistance is not as specified, replace the ignition coil.

Fig 12: Measuring Primary Coil Resistance

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Remove the ignition coils.

Inspect the secondary coil resistance.

Using an ohmmeter, measure the resistance between the positive (+) and high-tension terminals.

Secondary coil resistance:

SECONDARY COIL RESISTANCE

Condition	Specification
Cold	9.3 - 16.0 kΩ
Hot	11.7 - 18.8 kΩ

If the resistance is not as specified, replace the ignition coil.

Reinstall the ignition coils.
Reconnect the ignition coil connectors and high-tension cords.
Reinstall the air cleaner hose.

Fig 13: Measuring Secondary Coil Resistance
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECTION CAMSHAFT POSITION SENSOR

Disconnect the camshaft position sensor connectors.

Inspect the camshaft position sensor resistance. Using an ohmmeter, measure the resistance between terminals.

Resistance:

CAMSHAFT POSITION SENSOR RESISTANCE

Condition	Specification
Cold	835 - 1,400 Ω
Hot	1,060 - 1,645 Ω

Fig 14: Measuring Camshaft Position Sensor Resistance

If the resistance is not as specified, replace the camshaft position sensor.

Reconnect the camshaft position sensor connector.

INSPECT IGNITER (See step 1 )