Suzuki Ignis Service Manual page 3315

6-114 ENGINE GENERAL INFORMATION AND DIAGNOSIS
DTC CONFIRMATION PROCEDURE
NOTE:
Check to make sure that the following conditions are satisfied when using this DTC CONFIRMATION
PROCEDURE.
• Intake air temp.: –7°C (19.4°F) or higher
• Engine coolant temp.: –7°C (19.4°F) or higher
• Altitude (barometric pressure): 2400 m, 8000 ft or less (560 mmHg, 75 kPa or more)
1) Connect scan tool to DLC with ignition switch turned OFF.
2) Turn ON ignition switch and clear DTC, pending DTC and freeze frame data by using scan tool.
3) Start engine and run it for 10 sec.
4) Check DTC by using scan tool.
TROUBLESHOOTING
Step
1 Was "Engine and Emission Control System
Check" performed?
2 Check sensor circuit.
1) Disconnect connectors from ECM with igni-
tion switch turned OFF.
2) Remove ECM from vehicle body and con-
nect connectors to ECM.
3) Measure voltage between "C63-9" wire ter-
minal of ECM connector and vehicle body
ground with engine running.
Is voltage within 0.9 – 4 V?
3 Check sensor circuit for open.
1) Disconnect connector from knock sensor
with ignition switch turned OFF.
2) Turn ON ignition switch, measure voltage
between "RED" wire of knock sensor con-
nector and engine ground. See Fig. 1.
Is voltage 4 – 6 V?
4 Check sensor circuit for open.
1) Turn ON ignition switch, measure voltage
between "C63-9" wire terminal of ECM con-
nector and engine ground.
Is voltage 4 – 6 V?
5 Check sensor circuit for short.
1) Disconnect connectors from ECM with igni-
tion switch turned OFF.
2) Measure resistance between "C63-9" termi-
nal of ECM connector and vehicle body
ground.
Is resistance infinity?
Action Yes
Go to Step 2.
Intermittent trouble.
Check for intermittent
refer to "Intermittent and
Poor Connection" in Sec-
tion 0A.
If OK, substitute a known-
good ECM and recheck.
Go to Step 6.
"RED" wire in open circuit. Go to Step 5.
Go to Step 6.
No
Go to "Engine and Emis-
sion Control System
Check" in this section.
Go to Step 3.
Go to Step 4.
"RED" wire in shorted to
ground circuit.
If wire is OK, substitute a
known-good ECM and
recheck.