Ignition System: Testing and Inspection

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).

1. INSPECT SPARK TEST
Check that the spark occurs.
1. Disconnect the high-tension cord from the spark plug.
2. Remove the spark plug.
3. Install the spark plug to the high-tension cord.
4. Ground the spark plug.
5. See if spark occurs while 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 time. If the spark done not occur, do the test as shown in the diagram.

2. INSPECT HIGH-TENSION CORDS




a. Disconnect the high-tension cords from the spark plugs.
NOTE: Pulling on or bending the cords may damage the conductor inside.

b. 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.

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.




c. Using an ohmmeter, measure the resistance.

Maximum resistance: 25 kOhm per cord
If the resistance is greater than maximum, check the terminals. If necessary, replace the high-tension cord.




d. Connect the high-tension cords to the ignition coils.
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.

NOTE: Check that the holder is correctly installed to the grommet and ignition coil as shown in the illustration.

3. Check that the lock claw of the holder is engaged by lightly pulling the holder.
e. Connect the high-tension cords to the spark plugs.