Suzuki 2006 SX4, Service Manual

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1H-4 Ignition System:
4 Electrical connection check
1) Check ignition coil assemblies for electrical connection.
Are they connected securely?
Go to Step 5. Connect securely.
5 Ignition coil assembly power supply and ground circuit
check
1) Check ignition coil assembly power supply and ground
circuits for open and short.
Are circuits in good condition?
Go to Step 6. Repair or replace.
6 Ignition coil assembly check
1) Check ignition coil for resistance referring to “Ignition
Coil Assembly (Including ignitor) Inspection”.
Is check result satisfactory?
Go to Step 7. Replace ignition coil
assembly.
7 CKP sensor check
1) Check CKP sensor referring to “Crankshaft Position
(CKP) Sensor Inspection in Section 1C”.
Is check result satisfactory?
Go to Step 8. Tighten CKP sensor
bolt, replace CKP
sensor or CKP sensor
plate.
8 CMP sensor check
1) Check CMP sensor referring to “Camshaft Position
(CMP) Sensor Inspection in Section 1C”.
Is check result satisfactory?
Go to Step 9. Tighten CMP sensor
bolt, replace CMP
sensor or intake
camshaft.
9 Ignition trigger signal circuit check
1) Check ignition trigger signal wire for open, short and
poor connection.
Is circuit in good condition?
Go to Step 10. Repair or replace.
10 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 11. Substitute a known-
good ECM and then
repeat Step 2.
11 Ignition timing check
1) Check initial ignition timing and ignition timing advance
referring to “Ignition Timing Inspection”.
Is check result satisfactory?
System is in good
condition. Go to Step 12.
12 Knock sensor check
1) Confirm that knock sensor circuit is in good condition
referring to “DTC P0327 / P0328: Knock Sensor Circuit
Low / High in Section 1A”.
2) Check oscilloscope waveform of knock sensor signal
referring to “Reference waveform No.23” and
“Reference waveform No.24” under “Inspection of ECM
and Its Circuits in Section 1A”.
Is check result satisfactory?
Check CMP sensor,
CMP sensor rotor tooth
of camshaft, CKP
sensor, CKP sensor
plate and/or input
signals related to this
system. Substitute a known-
good knock sensor and
recheck.
Step Action Yes No