Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-101
DTC P0140: O2 Sensor (HO2S) Circuit No Activity Detected (Sensor-2)S6RW0D1104035
Wiring Diagram
Refer to “DTC P0137 / P0138: O2 Sensor (HO2S) Circuit Low Voltage / High Voltage (Sensor-2)”.
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure
WARNING!
• When performing a road test, select a place where there is no traffic or possibility of a traffic
accident and be very careful during testing to avoid occurrence of an accident.
• Road test should be carried out by 2 persons, a driver and a tester, on a level road.
1) With ignition switch turned OFF, connect scan tool.
2) Turn ON ignition switch and clear DTC using scan tool.
3) Start engine and warm up to normal operating temperature.
4) Increase vehicle speed to 60 – 80 km/h (37 – 50 mile/h) at 5th gear or D range.
5) Release accelerator pedal and with engine brake applied, keep vehicle coasting (with fuel cut for 4 sec. or more),
then stop vehicle and run engine at idle speed for 60 sec. or more.
6) Check DTC and pending DTC.
DTC Troubleshooting
NOTE
Before this troubleshooting is performed, read the precautions for DTC troubleshooting referring to
“Precautions for DTC Troubleshooting”.
DTC detecting condition Trouble area
HO2S-2 voltage is higher than specified value after warming up engine
(circuit open).
(2 driving cycle detection logic)•HO2S-2
• HO2S-2 circuit
•ECM
• Exhaust gas leakage
• Air intake system
Step Action Yes No
1Was “Engine and Emission Control System Check”
performed?Go to Step 2. Go to “Engine and
Emission Control
System Check”.
2HO2S-2 ground check
1) Disconnect connector from HO2S-2 with ignition switch
turned OFF.
2) Check for proper connection to HO2S-2 connector at
“RED/BLU”, “BRN”, “ORN” and “BLK/WHT” wire
terminals.
3) If connections are OK, measure resistance between
“ORN” wire terminal of HO2S-2 connector and engine
ground.
Is resistance less than 5
Ω?Go to Step 3. “ORN” wire is open or
high resistance circuit.
Poor “C01-57” terminal
connection. Faulty ECM
ground.
If they are OK,
substitute a known-
good ECM and recheck.
Downloaded from www.Manualslib.com manuals search engine 1B-1 Aux. Emission Control Devices:
Engine
Aux. Emission Control Devices
Diagnostic Information and Procedures
EGR System Inspection (If Equipped)S6RW0D1204001
1) Connect SUZUKI scan tool to data link connector
(DLC) (1) with ignition switch turned OFF.
2) Turn ON ignition switch and erase DTC using
“Delete” in “DTC” menu of scan tool.
3) Start engine and warm it up to normal operating
temperature, then select “Data List” mode on scan
tool.
4) Make sure that vehicle condition is as follows.
• Vehicle speed = 0 km/h (0 KPH)
• Engine speed ≤ 900 rpm
• Engine coolant temp. ≥ 90 °C, 164 °F5) With engine idling (without depressing accelerator
pedal), open EGR valve by using “Step EGR
Control” mode in “Engine / Active Test” menu. In this
state, as EGR valve opening increases engine idle
speed drops. If not, possible cause is clogged EGR
gas passage, stuck or faulty EGR valve.
Special tool
(A): SUZUKI scan tool (SUZUKI-SDT)
Repair Instructions
EVAP Canister Purge InspectionS6RW0D1206001
NOTE
Before inspection, check to make sure that
gear shift lever is in neutral position and that
parking brake lever is pulled all the way up.
1) Disconnect purge hose (1) from purge pipe.
2) Place finger against the end of disconnected hose
and check that vacuum is not felt there when engine
is cool and running at idle speed. If check result is
not satisfactory, check EVAP canister purge valve,
wire harness and ECM.
EVAP Canister Purge Valve and Its Circuit
Inspection
S6RW0D1206002
WARNING!
Do not apply vacuum by mouth; otherwise
harmful fuel vapor can be breathed in.
CAUTION!
Do not apply vacuum more than –86 kPa (–
12.47 psi); otherwise EVAP canister purge
valve could be damaged.
(A) 1I5RW0C110011-01
1
I5RW0A120006-01
