Suzuki Liana RH413 Service Manual page 118

1A-67 Engine General Information and Diagnosis:
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.
DTC Troubleshooting
Step
1 Was "Engine and Emission Control System Check"
performed?
2 Is there DTC(s) other than fuel system (DTC P0171 /
P0172)?
3 Check HO2S-1 output voltage
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 below 0.3 V
and over 0.6 V repeatedly?
Action
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.
2) Clear DTC with ignition switch ON.
3) Start engine and drive vehicle under usual driving
condition (described in "DTC Confirmation
Procedure" of "DTC P0136: Heated Oxygen Sensor
(HO2S) Circuit Malfunction (Sensor-2)") for 5 min. or
longer and until engine is warmed up to normal
operating temperature.
4) Keep vehicle speed at 50 – 60 km/h, 30 – 40 mph in
5th gear or "D" range for 5 min. or more.
5) Stop vehicle (do not turn ignition switch OFF).
6) Check pending DTC and DTC.
Yes
Go to Step 2.
Go to applicable DTC
flow.
Go to Step 4.
No
Go to "Engine and
Emission Control
System Check".
Go to Step 3.
Go to "DTC P0130 (No.
14): Heated Oxygen
Sensor (HO2S) Circuit
Malfunction (Sensor-1)".