Suzuki GA413 Service Manual page 494

6F-4 IGNITION SYSTEM
Condition
Engine cranks, but will
not start or hard to start
Poor fuel economy or
engine performance
DIAGNOSTIC FLOW TABLE
STEP
1 Was ENGINE DIAG. FLOW CHART performed?
2 Ignition Spark Test
1) Check all spark plugs for condition and type,
referring to SPARK PLUGS.
2) If OK, perform ignition spark test, referring to
IGNITION SPARK TEST.
Is spark emitted from all spark plugs?
3 Diagnostic Trouble Code (DTC) Check
Is DTC stored in ECM referring to DTC CHECK in
SECTION 6E?
4 Electrical Connection Check
1) Check ignition coil assemblies and high-tension
cords for electrical connection.
Are they connected securely?
5 High-Tension Cord Check
1) Check high-tension cord for resistance referring
to HIGH-TENSION CORD.
Is check result satisfactory?
DIAGNOSIS
Possible Cause
No spark or abnormal spark
D Blown fuse for ignition coil
D Loose connection or disconnection of lead wire or
high-tension cord(s)
D Faulty high-tension cord(s)
D Faulty spark plug(s)
D Faulty ignition coil/ignitor
D Faulty CKP sensor or crankshaft timing belt
pulley
D Faulty ECM
D Incorrect ignition timing
D Faulty spark plug(s) or high-tension cord(s)
D Faulty ignition coil
D Faulty CKP sensor or crankshaft timing belt
pulley
D Faulty ECM
ACTION
Replace.
Connect securely.
Replace.
Adjust, clean or replace.
Replace ignition coil assembly.
Clean, tighten or replace.
Replace.
Check related sensors and
crankshaft timing belt pulley.
Adjust, clean or replace.
Replace.
Clean, tighten or replace.
Replace.
YES
Go to Step 2.
Go to Step 11.
Go to applicable flow
Chart corresponding to
that code No. in
SECTION 6E.
Go to Step 5.
Go to Step 6.
Correction
NO
Go to ENGINE DIAG.
FLOW CHART in
SECTION 6.
Go to Step 3.
Go to Step 4.
Connect securely.
Replace high-tension
cord(s).