Suzuki Liana RH413, Service Manual

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1A-57 Engine General Information and Diagnosis:
DTC Detecting Condition and Possible Cause
DTC Confirmation Procedure
WARNING
!
• When performing a road test, select a
place where there is no traffic or
possibility of a traffic accident and very
careful during testing to avoid occurrence
of an accident.
• Road test should be carried out with 2
persons, a driver and tester, on a level
road.
NOTE
Check to make sure that the following
conditions are satisfied when using this DTC
confirmation procedure.
• Altitude (barometric pressure): 2400 m,
8000 ft or less (560 mmHg, 75 kPa or more)
• Ambient temp.: –10
°
C, 14
°
F or higher
• Intake air temp.: 70
°
C, 158
°
F or lower
1) Turn ignition switch OFF. Clear DTC with ignition
switch ON.
2) Warm up engine to normal operating temperature.
3) Drive vehicle at 50 – 60 km/h, 30 – 40 mph for 2 min.
4) Stop vehicle and run engine at idle for 2 min.
5) Check DTC and pending DTC.
DTC Troubleshooting
DTC detecting condition Possible cause
• When running at idle speed after engine warmed up and
running at specified vehicle speed, HO2S-1 output voltage
does not go below 0.3 V or order 0.6 V.
*2 driving cycle detection logic, Monitoring once / 1 driving
• Heated oxygen sensor-1 malfunction
• “WHT” or “ORN” circuit open (poor connection)
or short
Step Action Yes No
1 Was “Engine and Emission Control System Check”
performed? Go to Step 2. Go to “Engine and
Emission Control
System Check”.
2 Is there DTC(s) other than HO2S-1 (DTC P0130)? Go to applicable DTC
diag. flow. Go to Step 3.
3 Check HO2S-1 signal
1) Connect scan tool to DLC with ignition switch OFF.
2) Warm up engine to normal operating temperature and
keep it at 2000 r/min. for 60 sec.
3) Repeat racing engine (Repeat depressing accelerator
pedal 5 to 6 times continuously and take foot off from
pedal to enrich and enlean A/F mixture).
Does HO2S-1 output voltage deflect between 0.3 V and over
0.6 V repeatedly?
Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”. Check “WHT” and
“ORN” wires for open
and short, and
connections for poor
connection.
If wires and connections
are OK, replace HO2S-
1.
IYSQ01114019-01