Suzuki SX4 Service Manual page 397

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Step
6
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?
7
Ignition coil assembly check
1) Check ignition coil for resistance referring to "Ignition
Coil Assembly (Including Ignitor) Inspection".
Is check result satisfactory?
8
CKP sensor check
1) Check CKP sensor referring to "Crankshaft Position
(CKP) Sensor Inspection in Section 1C".
Is check result satisfactory?
9
CMP sensor check
1) Check CMP sensor referring to "Camshaft Position
(CMP) Sensor Inspection in Section 1C".
Is check result satisfactory?
10 Ignition trigger signal circuit check
1) Check ignition trigger signal wire for open, short and
poor connection.
Is circuit in good condition?
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?
12 Ignition timing check
1) Check initial ignition timing and ignition timing advance
referring to "Ignition Timing Inspection".
Is check result satisfactory?
13 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.19" and
"Reference waveform No.20" under "Inspection of ECM
and Its Circuits in Section 1A".
Is check result satisfactory?
Action
Yes
Go to Step 7.
Go to Step 8.
Go to Step 9.
Go to Step 10.
Go to Step 11.
Go to Step 12.
System is in good
condition.
Check CMP sensor,
CMP sensor rotor tooth
of camshaft, CKP
sensor, CKP sensor
plate and/or input
signals related to this
system.
Ignition System:
1H-5
No
Repair or replace.
Replace ignition coil
assembly.
Tighten CKP sensor
bolt, replace CKP
sensor or CKP sensor
plate.
Tighten CMP sensor
bolt, replace CMP
sensor or intake
camshaft.
Repair or replace.
Substitute a known-
good ECM and then
repeat Step 2.
Go to Step 13.
Substitute a known-
good knock sensor and
recheck.

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