Suzuki Grand Vitara Service Manual page 481

Step
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.26" and
"Reference waveform No.27" under "Inspection of ECM
and Its Circuits: in Section 1A".
Is check result satisfactory?
Ignition Spark Test
1) Remove engine cover.
2) Disconnect all injector couplers from injectors.
WARNING
!
Without disconnection of injector couplers, combustible gas may come out from spark plug holes
during this test and may get ignited in engine room.
3) Remove spark plug and check it for condition and type referring to "Spark Plug Inspection: ".
4) If OK, connect ignition coil coupler to ignition coil assembly and connect spark plug to ignition coil assembly or
high-tension cord. Ground spark plug.
5) Crank engine and check if each spark plug sparks.
6) If no spark is emitted, inspect the related parts as described in "Ignition System Symptom Diagnosis: ".
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Action
[A]
[B]
[A]: M16 engine model
[B]: J20 engine model
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Ignition System:
Yes
Check CMP sensor,
CMP sensor rotor tooth
of camshaft, CKP
sensor, CKP sensor
plate and/or input
signals related to this
system.
I5JB0A180003-01
1H-6
No
Substitute a known-
good knock sensor and
recheck.
S5JB0A1804004