Component Tests and General Diagnostics

ON-VEHICLE INSPECTION

SPARK TEST
1. Remove the ignition coil connector(A).





NOTE:
Disconnect the ignition coil connector while pulling up the connector lock.

2. Remove the ignition coil.
3. Using a spark plug socket, remove the spark plug.
4. Install the spark plug to the ignition coil.
5. Ground the spark plug to the engine.




6. Check is spark occurs while engine is being cranked.

NOTE:
To prevent fuel being injected from injectors while the engine is being cranked, remove the fuel pump(A) relay from the fuse box.
Crank the engine for no more than 5 - 10 seconds.




7. Inspect all the spark plugs.
8. Using a spark plug socket, install the spark plug.
9. Install the ignition coil.
10. Reconnect the ignition coil connector.





INSPECT SPARK PLUG
1. Inspect the electrodes(A) an ceramic insulator(B).




INSPECTION OF ELECTRODES





2. Check the electrode gap (A).

Standard : 1.0 - 1.1 mm (0.0394 - 0.0433 in.)





INSPECT IGNITION COIL
1. Measure the primary coil resistance between terminals (ECU) and battery (+).

Standard : 0.715Ohms ± 15%





NOTE:
Measure the resistance between the terminals No.1 and No.2.

REMOVAL

IGNITION COIL
1. Remove the engine cover.
2. Remove the ignition coil (A).




3. Remove the ignition coil.
4. Installation is the reverse of removal.

REPLACEMENT

SPARK PLUG
1. Remove the ignition coil connector(A).




2. Remove the ignition coil.
3. Using a spark plug socket, remove the spark plug.

CAUTION:
Be careful that no contaminates enter through the spark plug holes

4. When replacing the spark plug, always use the long reach type spark plug.
(1) Color Marking (Tip)
A. [2.7L]
Unleaded : Yellow Marking
Leaded : Green Marking
(2) Length(Tip-Tip / PT Length)
A. [2.7L]
B. 83.2mm/ 26.5mm
C. Others: The length is different from the specification above.
(3) Part ID
A. [U2.7]
Unleaded : ILFR5B11
Leaded : LFR5A