2010 NISSAN LATIO sensor

DTC P0139 HO2S2EC-747
< SERVICE INFORMATION > [MR18DE]
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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:0000000005532595
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: January 20102010 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: January 20102010 Versa

DTC P0139 HO2S2EC-749
< SERVICE INFORMATION > [MR18DE]
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Removal and InstallationINFOID:0000000005532596
HEATED OXYGEN SENSOR 2
Refer to
EM-140, "Removal and Installation".
Revision: January 20102010 Versa

EC-750
< SERVICE INFORMATION >[MR18DE]
DTC P014C, P014D, P015A, P015B, A/F SENSOR 1
DTC P014C, P014D, P015A, P015B, A/F SENSOR 1
Component DescriptionINFOID:0000000005612766
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:0000000005612760
Specification data are reference values.
On Board Diagn osis LogicINFOID:0000000005612761
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.
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 DIAG1 (B1) DTC P015A and P015B self-diagnosis is incomplete.
INCMP
DTC P015A and P015B self-diagnosis is complete. CMPLT
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
P015A Air fuel ratio (A/F) sensor 1
(bank 1) circuit delayed re-
sponse
P015B
Revision: January 20102010 Versa

DTC P014C, P014D, P015A, P015B, A/F SENSOR 1
EC-751
< SERVICE INFORMATION > [MR18DE]
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DTC Confirmation ProcedureINFOID:0000000005612762
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.
Do you have CONSULT
-III?
YES >> GO TO 2.
NO >> GO TO 5.
2.PERFORM DTC CONFIRMATION PROCEDURE-1
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.
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1minute under no load.
6. Let engine idle for 1 minute.
7. Increase the engine speed up to 4,000 to 5,000 rpm and keep it for 10 seconds.
8. Fully release accelerator pedal and then let engine idle for about 1 minute.
9. Check the items status of “DATA MONITOR” as follows. NOTE:
If “PRSNT” changed to “ABSNT”, refer to EC-705, "
Overall Function Check".
Is
“PRSNT” displayed on CONSULT-III screen?
YES >> GO TO 4.
NO >> GO TO 3.
3.PERFORM DTC CONFIRMATION PROCEDURE-2
With CONSULT-III
Perform DTC confirmation procedure-1 again.
Is
“PRSNT” displayed on CONSULT-III screen?
YES >> GO TO 4.
NO >> Refer to EC-705, "
Overall Function Check".
4.PERFORM DTC CONFIRMATION PROCEDURE-2
1. Wait for about 20 seconds at idle.
2. Check the items status of “DATA MONITOR” as follows. NOTE:
If “CMPLT” changed to “INCMP”, refer to EC-705, "
Overall Function Check".
Is
“CMPLT” displayed on CONSULT-III screen?
YES >> GO TO 5.
NO >> Refer to EC-705, "
Overall Function Check".
5.PERFORM SELF-DIAGNOSIS
With CONSULT-III
Data monitor item Status
A/F SEN1 DIAG3 (B1) PRSNT
Data monitor itemStatus
A/F SEN1 DIAG1 (B1) CMPLT
A/F SEN1 DIAG2 (B1)
Revision: January 20102010 Versa

EC-752
< SERVICE INFORMATION >[MR18DE]
DTC P014C, P014D, P015A, P015B, A/F SENSOR 1
Check the “SELF-DIAG RESULT”.
Is any DTC detected?
YES >> Proceed to
EC-754, "Diagnosis Procedure".
NO >> INSPECTION END
6.CHECK AIR-FUEL RATIO SELF-LEARNING VALUE
With GST
1. Start engine and warm it up to normal operating temperature.
2. Select Service $01 with GST.
3. Calculate the total value of “Short term fuel trim” and “Long term fuel trim” indications.
Is the total percentage within
±15%?
YES >> GO TO 8.
NO >> GO TO 7.
7.DETECT MALFUNCTIONING PART
Check the following.
• Intake air leaks
• Exhaust gas leaks
• Incorrect fuel pressure
• Lack of fuel
• Fuel injector
• Incorrect PCV hose connection
• PCV valve
• Mass air flow sensor
>> Repair or replace malfunctioning part.
8.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
5. Let engine idle for 1 minute.
6. Increase the engine speed up to 4,000 to 5,000 rpm and keep it for 10 seconds.
7. Fully release accelerator pedal and then let engine idle for about 1 minute.
8. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Proceed to EC-754, "Diagnosis Procedure".
NO >> INSPECTION END
Revision: January 20102010 Versa

DTC P014C, P014D, P015A, P015B, A/F SENSOR 1
EC-753
< SERVICE INFORMATION > [MR18DE]
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Wiring DiagramINFOID:0000000005612767
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-III.
CAUTION:
AABWA0319GB
Revision: January 20102010 Versa

EC-754
< SERVICE INFORMATION >[MR18DE]
DTC P014C, P014D, P015A, P015B, A/F SENSOR 1
Do not use ECM ground terminals when measuring input/output voltage. Doi
ng 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:0000000005612764
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten engine screw on the body. Refer to EC-638, "
Ground Inspection".
OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
2.RETIGHTEN AIR FUEL RATIO (A/F) SENSOR 1
Loosen and retighten the air fuel ratio (A/F) sensor 1. Refer to EM-140, "
Removal and Installation".
>> GO TO 3.
3.CHECK EXHAUST GAS LEAK
1. Start engine and run it at idle.
TERMI- NAL
NO. WIRE
COLOR ITEM
CONDITION DATA (DC Voltage)
3 G A/F sensor 1 heater [Engine is running]
•
Warm-up condition
• Idle speed (More than 140 seconds after starting
engine) Approximately 2.9 - 8.8 V
49 W A/F sensor 1 [Engine is running]
•
Warm-up condition
• Engine speed: 2,000 rpm Approximately 1.8 V
Output voltage varies with air fuel
ratio.
53 B A/F sensor 1 [Ignition switch: ON] Approximately 2.2 V
PBIA8148J
:Vehicle front
1. Body ground E24 2. Engine ground F9 3. Engine ground F16
4. Body ground E15
BBIA0698E
Revision: January 20102010 Versa