Ignition System Check: Notes

IGNITION SYSTEM DIAGNOSIS CHART

Step	Action	YES	NO
1	Was "Engine and Emission Control System Check" performed?	Go to Step 2.	Go to ENGINE AND EMISSION CONTROL SYSTEM CHECK .
2	Ignition spark test Check all spark plug for condition and type referring to SPARK PLUG INSPECTION . If OK, perform ignition spark test referring to IGNITION SPARK CHECK . Is spark emitted from all spark plugs?	Go to Step 8.	Go to Step 3.
3	DTC check Check DTC stored in ECM referring to DTC CHECK . Is DTC stored?	Go to applicable diag. flow corresponding to that DTC.	Go to Step 4.
4	Electrical connection check Check ignition coil assemblies for electrical connection. Are they connected securely?	Go to Step 5.	Connect securely.
5	Ignition coil assembly power supply, ground and trigger signal circuits check Check these circuits for open and short. Are circuits in good condition?	Go to Step 6.	Repair or replace.
6	Ignition coil assembly check Substitute a known-good ignition coil assembly and then repeat Step 2. Is check result of Step 2 satisfactory?	Malfunction of ignition coil assembly.	Go to Step 7.
7	CMP sensor check Check CMP sensor referring to DTC P0340: CAMSHAFT POSITION SENSOR CIRCUIT . Is check result satisfactory?	Substitute a known-good ECM and then repeat Step 2.	Tighten CMP sensor bolt or replace CMP sensor.
8	Ignition timing check Check initial ignition timing and ignition timing advance referring to IGNITION TIMING CHECK AND ADJUSTMENT . Is check result satisfactory?	System is in good condition.	Adjust ignition timing or check ECM input signals related to this system.