On-Vehicle Inspection [09/2014 - ]: Procedure

PERFORM SPARK TEST

Check for DTCs (See article. Refer to DTC CHECK / CLEAR [09/2014 - ] ).
NOTE:
If any DTC is present, perform troubleshooting procedures for that DTC.

Check that spark occurs.

Remove the ignition coils and spark plugs (See article. Refer to REMOVAL [09/2014 - ] ).

Disconnect the 4 injector connectors.

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Disconnect the 2 injector driver connectors by using the following procedures: 1) move the lock lever in the direction indicated by the arrow to release the connector lock, and then 2) disconnect the connectors together with the wire harness locks.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

TEXT IN ILLUSTRATION

*1	Lock Lever
*a	Release

Install the spark plug to the ignition coil, and then connect the ignition coil connector.
Connect the Techstream to the DLC3.
Put the engine in inspection mode (See article. Refer to INSPECTION MODE PROCEDURE [09/2014 - 10/2015] Refer to INSPECTION MODE PROCEDURE [10/2015 - ] ).
Ground the spark plug.
Visually check that sparks occur while the engine is being cranked.
NOTE:
- When performing the inspection, be sure to ground the hexagonal portion or the threaded portion of the spark plug.
- Do not crank the engine for more than 2 seconds.
- If an ignition coil assembly is struck or dropped, replace it with a new one.
- If a spark plug is struck or dropped, replace it with a new one.
If sparks do not occur normally in 1 or more cylinders, perform the "Ignition Coil and Spark Test" below.

INSPECT IGNITION COIL AND SPARK TEST

Spark test flowchart.

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

Result

Result	Proceed to
NG	Connect securely
OK	Go to next step

Perform a spark test on a malfunctioning ignition coil with igniter.

1. Replace the ignition coil with a normal one.

2. Perform the spark test again.

Result

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

Check that power is supplied to the ignition coil.

Turn the power switch on (IG).

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

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Standard Voltage

Tester Connection	Condition	Specified Condition
1 (+B) - 4 (GND)	Power switch on (IG)	11 to 14 V

Result

Result	Proceed to
NG	Check wiring between power switch and ignition coil with igniter and check ground circuit
OK	Go to next step

TEXT IN ILLUSTRATION

*a	Front view of wire harness connector (to Ignition Coil)

Inspect the spark plugs.

1. If there is a cylinder in which ignition does not occur, interchange the spark plug of that cylinder and the spark plug of a cylinder in which ignition properly occurs.

2. Check that sparks occur in the cylinder in which the properly functioning spark plug was installed.

Result

Result	Proceed to
NG	Inspect the ignition system (See article. Refer to 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 [09/2014 - 10/2015] Refer to 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 [10/2015 - ] )
OK	Replace spark plug

Proceed to

Replace spark plug

NOTE:

If an ignition coil assembly is struck or dropped, replace it with a new one.
If a spark plug is struck or dropped, replace it with a new one.

Connect the 2 injector driver connectors by using the following procedures: 1) connect the connectors together with the wire harness locks, and then 2) move the lock lever in the direction indicated by the arrow to lock the connector.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

TEXT IN ILLUSTRATION

*1	Lock Lever

Connect the 4 fuel injector connectors.
Install the spark plugs and ignition coils (See article. Refer to INSTALLATION [09/2014 - ] ).
Clear the DTCs (See article. Refer to DTC CHECK / CLEAR [09/2014 - ] ).

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 using a megohmmeter:

Using a megohmmeter, measure the insulation resistance.

Standard Insulation Resistance

Tester Connection	Condition	Specified Condition
Spark plug (terminal part) - Body ground	Always	10 MΩ or higher

TEXT IN ILLUSTRATION

Ground

HINT:

If the result is not as specified, clean the spark plug with a spark plug cleaner and measure the resistance again.
If a megohmmeter is not available, perform the following simple inspection instead.

Alternative inspection method:
1. Put the engine in inspection mode (See article. Refer to INSPECTION MODE PROCEDURE [09/2014 - 10/2015] Refer to INSPECTION MODE PROCEDURE [10/2015 - ] ).
2. Start the engine.*
3. Quickly accelerate the engine to 2500 rpm 5 times.
  NOTE:
  *: Do not perform this step if P0300 (misfire detection) or a related DTC is stored.
4. Remove the spark plug.
5. 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.

HINT:

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

Recommended Spark Plug

Manufacturer	Spark Plug Type
DENSO	FK20HBR8

Reference
1. Check the spark plug electrode gap.
  Maximum electrode gap for a used spark plug
  
  1.1 mm (0.0433 in.)
  
  If the gap is more than the maximum, replace the spark plug.
  
  NOTE:
  Never attempt to adjust the gap of a used plug.
  
  Electrode gap for a new spark plug
  
  0.7 to 0.8 mm (0.0276 to 0.0315 in.)
Clean the spark plugs.
If the electrode has traces of wet carbon, clean the electrode with a spark plug cleaner and then dry it.

Standard air pressure

588 kPa (6.0 kgf/cm² , 85 psi)

Standard duration

20 seconds or less

HINT:

Only use a 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.