oxygen sensor NISSAN TIIDA 2011 Service Repair Manual

DTC P0139 HO2S2EC-741
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DTC P0139 HO2S2
Component DescriptionINFOID:0000000006341899
The heated oxygen sensor 2, after three way catalyst (manifold),
monitors the oxygen level in the exhaust gas.
Even if switching characteristics of the air fuel ratio (A/F) sensor 1
are shifted, the air/fuel ratio is c
ontrolled to stoichiometric, by the sig-
nal from the heated oxygen sensor 2.
This sensor is made of ceramic zirconia. The zirconia generates volt-
age from approximately 1 V in richer conditions to 0 V in leaner con-
ditions.
Under normal conditions the heated oxygen sensor 2 is not used for
engine control operation.
CONSULT-III Reference Val ue in Data Monitor ModeINFOID:0000000006341900
Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000006341901
The heated oxygen sensor 2 has a much longer switching time
between rich and lean than the air fuel ratio (A/F) sensor 1. The oxy-
gen storage capacity of the three way catalyst 1 causes the longer
switching time. To judge the malfunctions of heated oxygen sensor
2, ECM monitors whether the s witching response of the sensor's
voltage is faster than specified during various driving conditions such
as fuel cut.
DTC Confirmation ProcedureINFOID:0000000006341902
1.INSPECTION START
Do you have CONSULT-III?
SEF327R
Monitor item ConditionSpecification
HO2S2 (B1) • Revving engine from idle to 3,000 rpm quickly after the following
conditions are met.
- Engine: After warming up
- Keeping the engine speed between 3,500 and 4,000 rpm for 1
minute and at idle for 1 minute under no load 0 - 0.3 V ←→
Approx. 0.6 - 1.0 V
HO2S2 MNTR (B1) LEAN ←→ RICH
HO2 S2 DIAG1 (B1) DTC P0139 self-diagnosis (delayed response) is incomplete.
INCMP
DTC P0139 self-diagnosis (delayed response) is complete. CMPLT
HO2 S2 DIAG2 (B1) DTC P0139 self-diagnosis (slow response) is incomplete.
INCMP
DTC P0139 self-diagnosis (slow response) is complete. CMPLT
SEF302U
DTC No. Trouble diagnosis nameDTC detecting condition Possible cause
P0139
0139 Heated oxygen sensor 2
(bank 1) circuit slow re-
sponse The switching time between rich and lean of a
heated oxygen sensor 2 signal delays more
than the specified time computed by ECM. • Harness or connectors
(The sensor circuit is open or shorted)
• Heated oxygen sensor 2
• Fuel system
• EVAP system
• Intake air system
Revision: May 2010 2011 Versa

DTC P0139 HO2S2EC-743
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>> GO TO 3.
6.PERFORM SELF-DIAGNOSIS
With CONSULT-III
Perform ECM self-diagnosis.
Is DTC
“P0139” detected?
YES >> Proceed to EC-745, "Diagnosis Procedure".
NO >> INSPECTION END
7.PERFORM OVERALL FUNCTION CHECK
Perform component function check. Refer to EC-743, "
Overall Function Check".
NOTE:
Use overall function check to check the overall func tion of the heated oxygen sensor 2 circuit. During this
check, a 1st trip DTC might not be confirmed.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Proceed to EC-745, "
Diagnosis Procedure".
Overall Function CheckINFOID:0000000006341903
Use this procedure to check the overall function of the heated oxygen sensor 2 circuit. During this check, a 1st
trip DTC might not be confirmed.
WITH GST
1. Start engine and warm it up to the normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Start engine and keep the engine between 3,500 and 4,000 rpm for at least 1 minute under no load.
4. Let engine idle for 1 minute.
5. Set voltmeter probes between ECM terminal 50 (HO2S2 signal) and ground.
6. Check the voltage when revving up to 4,000 rpm under no load at least 10 times.
(Depress and release accelerator pedal as soon as possible.)
A change of voltage should be more than 0.8 V for 1 second
during this procedure.
If the voltage can be confirmed in step 6, step 7 is not nec-
essary.
7. Keep vehicle at idling for 10 minutes, then check the voltage. Or check the voltage when coasting from 80 km/h (50 MPH) in D
position with OD OFF (A/T), D position (CVT) or 3rd gear posi-
tion (M/T).
A change of voltage should be more than 0.8 V for 1 second
during this procedure.
8. If NG, go to EC-745, "
Diagnosis Procedure".
PBIB2996E
Revision: May 2010 2011 Versa

DTC P0139 HO2S2EC-745
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Do not use ECM ground terminals wh
en measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground ot her than ECM terminals, such as the ground.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnosis ProcedureINFOID:0000000006341905
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screw on the body. Refer to EC-638, "
Ground Inspection".
OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
2.CLEAR THE SELF-LEARNING DATA
With CONSULT-III
TERMI-
NAL
NO. WIRE
COLOR ITEM
CONDITION DATA (DC Voltage)
5G Heated oxygen sensor 2
heater [Engine is running]
• Engine speed: Below 3,600 rpm after the
following conditions are met.
- Engine: After warming up
- Keeping the engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load. Approximately 10 V
[Ignition switch: ON]
• Engine stopped
[Engine is running]
• Engine speed: Above 3,600 rpm. BATTERY VOLTAGE
(11 - 14 V)
50 W Heated oxygen sensor 2 [Engine is running]
• Revving engine from idle to 3,000 rpm
quickly after the following conditions are
met.
- Engine: After warming up
- Keeping the engine speed between
3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load. 0 - Approximately 1.0 V
59 O Sensor ground
(Heated oxygen sensor 2) [Engine is running]
•
Warm-up condition
• Idle speed Approximately 0 V
PBIA8148J
:
Vehicle front
1. Body ground E24 2. Engine ground F9 3. Engine ground F16
4. Body ground E15
BBIA0698E
Revision: May 2010 2011 Versa

EC-746
< SERVICE INFORMATION >[MR18DE]
DTC P0139 HO2S2
1. Start engine and warm it up to normal operating temperature.
2. Select “SELF-LEARNING CONT” in
“WORK SUPPORT” mode with CONSULT-III.
3. Clear the self-learning control coefficient by touching “CLEAR”.
4. Run engine for at least 10 minutes at idle speed. Is the 1st trip DTC P0171 or P0172 detected?
Is it difficult to start engine?
Without CONSULT-III
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF.
3. Disconnect mass air flow sensor (1) harness connector, and restart and run engine for at least 5 seconds at idle speed.
4. Stop engine and reconnect mass air flow sensor harness con- nector.
5. Make sure that DTC P0102 is displayed.
6. Erase the DTC memory. Refer to EC-542, "
Emission-related
Diagnostic Information".
7. Make sure that DTC P0000 is displayed.
8. Run engine for at least 10 minutes at idle speed. Is the 1st trip DTC P0171 or P0172 detected?
Is it difficult to start engine?
Ye s o r N o
Yes >> Perform trouble diagnosis for DTC P0171 or P0172. Refer to EC-758 or EC-764.
No >> GO TO 3.
3.CHECK HO2S2 GROUND CIRCUI T FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect heated oxygen sensor 2 harness connector (2).
- : Vehicle front
- Heated oxygen sensor 2 (1)
3. Disconnect ECM harness connector.
4. Check harness continuity between HO2S2 terminal 1 and ECM terminal 59. Refer to Wiring Diagram.
5. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 4.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK HO2S2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between HO 2S2 terminal 4 and ECM terminal 50.
Refer to Wiring Diagram.
2. Check harness continuity between ECM terminal 50 or HO2S2 terminal 4 and ground. Refer to Wiring Diagram.
3. Also check harness for short to power.
OK or NG
OK >> GO TO 5.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK HEATED OXYGEN SENSOR 2
Refer to EC-747, "
Component Inspection".
OK or NG
BBIA0701E
Continuity should exist.
BBIA0700E
Continuity should exist.
Continuity should not exist.
Revision: May 2010 2011 Versa

DTC P0139 HO2S2EC-747
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OK >> GO TO 6.
NG >> Replace heated oxygen sensor 2.
6.CHECK INTERMITTENT INCIDENT
Refer to EC-632
.
>> INSPECTION END
Component InspectionINFOID:0000000006341906
HEATED OXYGEN SENSOR 2 (M/T AND A/T MODELS)
With CONSULT-III
1. Start engine and warm it up to the normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
4. Let engine idle for 1 minute.
5. Select “FUEL INJECTION” in “ACTIVE TEST” mode, and select “HO2S2 (B1)” as the monitor item with
CONSULT-III.
6. Check “HO2S2 (B1)” at idle speed when adjusting “FUEL INJECTION” to ±25%.
“HO2S2 (B1)” should be above 0.68 V at least once when the “FUEL INJECTION” is +25%.
“HO2S2 (B1)” should be below 0.18 V at l east once when the “FUEL INJECTION” is −25%.
CAUTION:
• Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m
(19.7 in) onto a hard surface such as a concrete floor; use a new one.
• Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor
Thread Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.
Without CONSULT-III
1. Start engine and warm it up to the normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
4. Let engine idle for 1 minute.
5. Set voltmeter probes between ECM terminal 50 (HO2S2 signal) and ground.
6. Check the voltage when revving up to 4,000 rpm under no load at least 10 times.
(Depress and release accelerator pedal as soon as possible.)
The voltage should be above 0.68 V and below 0.18 V at
least once during this procedure.
If the voltage can be confirmed at step 6, step 7 is not nec-
essary.
7. Keep vehicle idling for 10 minutes, then check voltage. Or check the voltage when coasting from 80 km/h (50 MPH) in D position
with OD OFF (A/T) or 3rd gear position (M/T).
The voltage should be above 0.68 V and below 0.18 V at
least once during this procedure.
8. If NG, replace heated oxygen sensor 2.
PBIB3458E
PBIB2996E
Revision: May 2010 2011 Versa

EC-748
< SERVICE INFORMATION >[MR18DE]
DTC P0139 HO2S2
CAUTION:
• Discard any heated oxygen senso
r which has been dropped from a height of more than 0.5 m
(19.7 in) onto a hard surface such as a concrete floor; use a new one.
• Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor
Thread Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.
HEATED OXYGEN SENSOR 2 (CVT MODELS)
With CONSULT-III
1. Start engine and warm it up to the normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
4. Let engine idle for 1 minute.
5. Select “FUEL INJECTION” in “ACT IVE TEST” mode, and select “HO2S2 (B1)” as the monitor item with
CONSULT-III.
6. Check “HO2S2 (B1)” at idle speed when adjusting “FUEL INJECTION” to ±25%.
“HO2S2 (B1)” should be above 0.72 V at l east once when the “FUEL INJECTION” is +25%.
“HO2S2 (B1)” should be below 0.18 V at least once when the “FUEL INJECTION” is −25%.
CAUTION:
• Discard any heated oxygen senso r which has been dropped from a height of more than 0.5 m
(19.7 in) onto a hard surface such as a concrete floor; use a new one.
• Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor
Thread Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.
Without CONSULT-III
1. Start engine and warm it up to the normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
4. Let engine idle for 1 minute.
5. Set voltmeter probes between ECM terminal 50 (HO2S2 signal) and ground.
6. Check the voltage when revving up to 4,000 rpm under no load at least 10 times.
(Depress and release accelerator pedal as soon as possible.)
The voltage should be above 0.72 V and below 0.18 V at
least once during this procedure.
If the voltage can be confirmed at step 6, step 7 is not nec-
essary.
7. Keep vehicle idling for 10 minutes, then check voltage. Or check the voltage when coasting from 80 km/h (50 MPH) in D position.
The voltage should be above 0.72 V and below 0.18 V at
least once during this procedure.
8. If NG, replace heated oxygen sensor 2. CAUTION:
• Discard any heated oxygen senso r which has been dropped from a height of more than 0.5 m
(19.7 in) onto a hard surface such as a concrete floor; use a new one.
• Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor
Thread Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.
JMBIA2106GB
PBIB2996E
Revision: May 2010 2011 Versa

DTC P0139 HO2S2EC-749
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Removal and InstallationINFOID:0000000006341907
HEATED OXYGEN SENSOR 2
Refer to
EX-10, "Removal and Installation".
Revision: May 2010 2011 Versa

EC-750
< SERVICE INFORMATION >[MR18DE]
DTC P014C, P014D A/F SENSOR 1
DTC P014C, P014D A/F SENSOR 1
Component DescriptionINFOID:0000000006341908
The air fuel ratio (A/F) sensor 1 is a planar one-cell limit current sen-
sor. The sensor element of the
A/F sensor 1 is composed an elec-
trode layer, which transports ions. It has a heater in the element.
The sensor is capable of precise measurement = 1, but also in the
lean and rich range. Together with its control electronics, the sensor
outputs a clear, continuous signal throughout a wide range.
The exhaust gas components diffuse through the diffusion layer at
the sensor cell. An electrode layer is applied voltage, and this current
relative oxygen density in lean. Also this current relative hydrocar-
bon density in rich.
Therefore, the A/F sensor 1 is able to indicate air fuel ratio by this
electrode layer of current. In addition, a heater is integrated in the
sensor to ensure the required operating temperature of about 800° C
(1,472° F).
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000006341909
Specification data are reference values.
On Board Diagn osis LogicINFOID:0000000006341910
To judge malfunctions, this diagnosis measures response time of the A/F signal computed by ECM from the A/
F sensor 1 signal. The time is compensated by engi ne operating (speed and load), fuel feedback control con-
stant, and the A/F sensor 1 temperature index. Judgment is based on whether the compensated time (the A/F
signal cycling time index) is inordinately long or not.
DTC Confirmation ProcedureINFOID:0000000006341911
1.PRECONDITIONING
PBIB3353E
PBIB3354E
Monitor item ConditionSpecification
A/F SEN1 (B1) • Engine: After warming upMaintaining engine speed at
2,000 rpm Fluctuates around 2.2 V
A/F SEN1 DIAG2 (B1) DTC P014C and P014D self-diagnosis is incomplete.
INCMP
DTC P014C and P014D self-diagnosis is complete. CMPLT
A/F SEN1 DIAG3 (B1) The vehicle condition is not within the diagnosis range of DTC
P014C, P014D, P015A or P015B.
ABSNT
The vehicle condition is within the diagnosis range of DTC P014C,
P014D, P015A or P015B. PRSNT
DTC No. Trouble diagnosis name
DTC detecting conditionPossible Cause
P014C Air fuel ratio (A/F) sensor 1
(bank 1) circuit slow re-
sponse • The response time of a A/F sensor 1 signal de-
lays more than the specified time computed by
ECM. • Harness or connectors
(The A/F sensor 1 circuit is open or
shorted.)
• A/F sensor 1
P014D
Revision: May 2010
2011 Versa

DTC P014C, P014D A/F SENSOR 1EC-757
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10.CHECK MASS AIR FLOW SENSOR
Refer to EC-670, "
Component Inspection".
OK or NG
OK >> GO TO 11.
NG >> Replace mass air flow sensor.
11 .CHECK PCV VALVE
Refer to EC-538, "
Component Inspection".
OK or NG
OK >> GO TO 12.
NG >> Repair or replace PCV valve.
12.CHECK INTERMITTENT INCIDENT
Perform EC-632, "
Description".
OK or NG
OK >> GO TO 13.
NG >> Repair or replace.
13.REPLACE AIR FUEL RATIO (A/F) SENSOR 1
Replace air fuel ratio (A/F) sensor 1.
CAUTION:
• Discard any A/F sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.
• Before installing new A/F senso r, clean exhaust system threads using Oxygen Sensor Thread
Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.
>> INSPECTION END
Removal and InstallationINFOID:0000000006341914
AIR FUEL RATIO SENSOR HEATER
Refer to EM-141, "Removal and Installation".
Revision: May 2010 2011 Versa

EC-758
< SERVICE INFORMATION >[MR18DE]
DTC P0171 FUEL INJECTION SYSTEM FUNCTION
DTC P0171 FUEL INJECTION SYSTEM FUNCTION
On Board Diagn
osis LogicINFOID:0000000006341915
With the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture ratio can be brought closely to the
theoretical mixture ratio based on the mixture ratio feedback signal from the air fuel ratio (A/F) sensor 1. The
ECM calculates the necessary compensation to corr ect the offset between the actual and the theoretical
ratios. In case the amount of the compensation value is extremely large (The actual mixture ratio is too lean.),
the ECM judges the condition as the fuel injection sy stem malfunction and lights up the MIL (2 trip detection
logic).
DTC Confirmation ProcedureINFOID:0000000006341916
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
WITH CONSULT-III
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON and select “SELF-LE ARNING CONT” in “WORK SUPPORT” mode with CON-
SULT-III.
4. Clear the self-learning control coefficient by touching “CLEAR”.
5. Start engine. If it is difficult to start engine, the fuel injection system has a malfunction.
Perform the following procedure is advised.
a. Crank engine while depressing accelerator pedal. NOTE:
When depressing accelerator pedal three-fourths (3/4) or more, the control system does not start the
engine. Do not depress accelerator pedal too much.
b. If engine starts, go to EC-761, "
Diagnosis Procedure".
If engine does not start, check exhaus t and intake air leak visually.
6. Keep engine at idle for at least 5 minutes.
7. Check 1st trip DTC. The 1st trip DTC P0171 should be detected at this stage, if a malfunction exists. If so, go to EC-761,
"Diagnosis Procedure".
NOTE:
If 1st trip DTC is not detected during above proc edure, performing the following procedure is advised.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Start engine.
c. Maintain the following conditions for at least 10 consecutive minutes. Hold the accelerator pedal as steady as possible.
Sensor Input Signal to ECM ECM functionActuator
Air fuel ratio (A/F) sensor 1 Density of oxygen in exhaust gas
(Mixture ratio fe
edback signal) Fuel injection control Fuel injector
DTC No.
Trouble diagnosis
name DTC detecting condition
Possible cause
P0171
0171 Fuel injection system
too lean • Fuel injection system does not operate properly.
• The amount of mixture ratio compensation is too
large. (The mixture ratio is too lean.) • Intake air leaks
• Air fuel ratio (A/F) sensor 1
• Fuel injector
• Exhaust gas leaks
• Incorrect fuel pressure
• Lack of fuel
• Mass air flow sensor
• Incorrect PCV hose connection
Revision: May 2010
2011 Versa