Suzuki Ignis Service Manual page 3316

Step
6 Check sensor circuit for short.
1) Turn ON ignition switch, measure voltage
between "C63-9" terminal of ECM connec-
tor and vehicle body ground.
Is voltage 0 V?
7 Check sensor circuit for high resistance.
1) Measure resistance between "C63-9" wire
terminal of ECM connector and "RED" wire
terminal of knock sensor harness connec-
tor.
Is resistance below 5Ω?
Action
[A]: Fig. 1 for Step 3
ENGINE GENERAL INFORMATION AND DIAGNOSIS 6-115
Yes
Go to Step 7.
Faulty knock sensor
No
"RED" wire in shorted to
other circuit.
"RED" wire in high resis-
tance circuit.