Ignition System Check

Ignition System Check

1.
Was "Engine and Emission Control System Check" performed?
YES -
Go to Step 2.
NO -
Go to Engine and Emission Control System Check Engine and Emission Control System Check.

2. Ignition spark test 1

Perform ignition spark test. Ignition Spark Test

Is test result satisfactory?
YES -
Go to Step 3.
NO -
Go to Step 4.

3. Ignition timing check

Check ignition timing. Testing and Inspection

Is check result satisfactory?
YES -
Ignition system is in good condition.
NO -
Repair or replace malfunctioning part.

4. Confirmation of cylinders with malfunction detected

Confirm whether there are any cylinders with a malfunction detected in ignition spark test.

Are there malfunctions in any cylinders?
YES -
Go to Step 8.
NO -
Go to Step 5.

5. Ignition spark test 2

Replace spark plug in cylinder with malfunction detected with spark plug of normal cylinder.
Perform ignition spark test on spark plug newly installed in cylinder with malfunction detected. Ignition Spark Test

Is test result satisfactory?
YES -
Replace spark plug in malfunction-detected cylinder. Spark Plug Removal and Installation
NO -
Go to Step 6.

6. Ignition spark test 3

Replace ignition coil assembly in cylinder with malfunction detected with ignition coil assembly of normal cylinder.
Perform ignition spark test on spark plug in cylinder with malfunction detected. Ignition Spark Test

Is test result satisfactory?
YES -
Replace ignition coil assembly in cylinder with malfunction detected. Ignition Coil Assembly Removal and Installation
NO -
Go to Step 7.

7. Ignition coil assembly drive circuit check

Check drive circuits (B1, B2, B3 and B4) of each ignition coil assembly for open, short and poor connection. Ignition System Circuit Diagram

Are circuits in good condition?
YES -
Go to Step 8.
NO -
Repair malfunctioning part.

8. Ignition coil assembly power supply and ground circuit check

Check power supply (A1, A2, A3 and A4) and ground (C1, C2, C3 and C4) circuits of each ignition coil assembly for open, short and poor connection. Ignition System Circuit Diagram

Are circuits in good condition?
YES -
Replace ECM and recheck DTC. Service and Repair
NO -
Repair malfunctioning part.