On-Vehicle Inspection

PERFORM SPARK TEST

Check for DTCs. Refer to DTC CHECK / CLEAR .
NOTE:
If any DTC is present, perform troubleshooting procedures for that DTC.
Check that spark occurs.
1. Remove the ignition coils and spark plugs. Refer to REMOVAL .
2. Disconnect the 2 fuel delivery pipe connectors.
  
  Fig 1: Identifying Fuel Delivery Pipe Connectors
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Disconnect the 4 connectors with wire harness locks from the 2 injector drivers.
  
  Fig 2: Identifying Fuel Delivery Pipe Connectors And Wire Harness Locks Connectors
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  HINT:
  
  To release each connector lock, push the claw downward ("Release" in the illustration) and move the lock lever ("Move" in the illustration).
4. Install the spark plug into the ignition coil, and then connect the ignition coil connectors (step 4).
5. Ground the spark plug (step 5).
  
  Fig 3: Checking Spark Plugs Spark
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
6. Check that spark occurs while the engine is being cranked (step 6).
  NOTE:
  - Be sure to ground the spark plugs when checking.
  - Replace the ignition coil if it receives an impact.
  - Do not crank the engine for more than 2 seconds.
  HINT:
  - Repeat steps 4 - 6 for each spark plug and ignition coil.
  - If spark does not occur, perform the following procedure for the malfunctioning cylinder.

Perform the following spark test procedure.

Check that the ignition coil connector is securely connected.

Result

Result	Action
NG	Connect connector securely
OK	Go to next step

Perform a spark test.

Replace the ignition coil with a known good one.
Perform the spark test again.

Result

Result	Action
NG	Go to next step
OK	Replace the ignition coil

Perform a spark test.

Replace the spark plug with a known good one.
Perform the spark test again.

Result

Result	Action
NG	Go to next step
OK	Replace spark plug

Check the power supply.

Turn the engine switch on (IG).

Measure the voltage according to the value(s) in the table below.

Fig 4: Identifying Ignition Coil Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard Voltage

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

Result

Result	Action
NG	Check wiring between battery and ignition coil and check ground circuit
OK	Replace the ECM. Refer to COMPONENTS

Connect the 4 connectors with wire harness locks to the 2 injector drivers.

Fig 5: Identifying Connectors With Wire Harness Locks To Injector Drivers
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NOTE:
Connect the connectors securely.

HINT:

Move the lock lever in the direction indicated by the arrow to lock the connector.
Connect the 2 fuel delivery pipe connectors.

Fig 6: Identifying Fuel Delivery Pipe Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Install the ignition coils and spark plugs. Refer to INSTALLATION .
Clear the DTCs. Refer to DTC CHECK / CLEAR .

INSPECT SPARK PLUG

NOTE:

Do not use a wire brush for cleaning.
Do not attempt to adjust the electrode gap of a used spark plug.

Check the electrode.

Fig 7: Measuring Insulation Resistance
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 8: Identifying Spark Plug

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Alternative inspection method:
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.

Check the spark plug for any damage to its threads and insulator.

Fig 9: 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

Manufacturer	Product
DENSO made	FK20HBR11

HINT:

Fig 10: Identifying Electrode Gap

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.)

NOTE:

Fig 11: Cleaning Electrode With Spark Plug Cleaner

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 (6.0 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.