Suzuki GA413, Service Manual

Page: 495 / 1246

IGNITION SYSTEM 6F-5
STEP ACTION YES NO
6 Ignition Coil Assembly Power Supply and Ground
Circuit Check
1) Check ignition coil assembly power supply
(“B/W” wire) and ground circuit (“B” wire) for
open and short.
Are circuits in good condition?
Go to Step 7. Repair or replace.
7 Ignition Coil Assembly Check
1) Check ignition coil for resistance referring to
IGNITION COIL ASSEMBLY.
Is check result satisfactory?
Go to Step 8. Replace ignition coil as-
sembly.
8 Crankshaft Position (CKP) Sensor Check
1) Check crankshaft position sensor referring to
CKP SENSOR and CKP SENSING ROTOR in
SECTION 6E.
Is check result satisfactory?
Go to Step 9. Tighten CKP sensor bolt,
replace CKP sensor or
crankshaft timing belt
pulley.
9 CMP Sensor Check
1) Check CMP sensor and signal rotor, referring to
DTC NO. 15 CMP SENSOR CIRCUIT in SEC-
TION 6E.
Is check result satisfactory?
Go to Step 10. Tighten CMP sensor bolt,
replace CMP sensor.
10 Ignition Trigger Signal Circuit Check
1) Check ignition trigger signal wires (“W/B” and
“W/R” wire) for open, short and poor connec-
tion.
Are circuits in good condition?
Go to Step 11. Repair or replace.
11 A known-good Ignition Coil Assembly Substitution
1) Substitute a known-good ignition coil assembly
and then repeat STEP 2.
Is check result of STEP 2 satisfactory?
Go to Step 12. Substitute a known-good
ECM and then repeat
STEP 2.
12 Ignition Timing Check
1) Check initial ignition timing and ignition timing
advance referring to IGNITION TIMING.
Is check result satisfactory?
System is in good
condition.
Check CKP sensor,
crankshaft timing belt
pulley (signal rotor) and
input signals related to
this system.