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![NISSAN ALMERA N16 2003 Electronic Repair Manual HO2S1
EC-647
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HO2S1PFP:22690
Component DescriptionEBS00KKR
The heated oxygen sensor 1 is placed into the exhaust manifold. It
detects the a NISSAN ALMERA N16 2003 Electronic Repair Manual HO2S1
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HO2S1PFP:22690
Component DescriptionEBS00KKR
The heated oxygen sensor 1 is placed into the exhaust manifold. It
detects the a](/manual-img/5/57350/w960_57350-976.png)
HO2S1
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HO2S1PFP:22690
Component DescriptionEBS00KKR
The heated oxygen sensor 1 is placed into the exhaust manifold. It
detects the amount of oxygen in the exhaust gas compared to the
outside air. The heated oxygen sensor 1 has a closed-end tube
made of ceramic zirconia. The zirconia generates voltage from
approximately 1V in richer conditions to 0V in leaner conditions. The
heated oxygen sensor 1 signal is sent to the ECM. The ECM adjusts
the injection pulse duration to achieve the ideal air-fuel ratio. The
ideal air-fuel ratio occurs near the radical change from 1V to 0V.
CONSULT-II Reference Value in Data Monitor ModeEBS00KKS
Specification data are reference values.
SEF463R
SEF288D
MONITOR ITEM CONDITION SPECIFICATION
HO2S1 (B1)
●Engine: After warming up Maintaining engine speed at 2,000 rpm 0 - 0.3V ←→ Approx. 0.6 - 1.0V
HO2S1 MNTR (B1)
●Engine: After warming up Maintaining engine speed at 2,000 rpmLEAN←→ RICH
Changes more than 5 times dur-
ing 10 seconds.
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EC-648
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HO2S1
Wiring Diagram
EBS00KKT
YEC314A
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Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when NISSAN ALMERA N16 2003 Electronic Repair Manual HO2S1
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Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when](/manual-img/5/57350/w960_57350-978.png)
HO2S1
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Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
Diagnostic ProcedureEBS00KKU
1.INSPECTION START
Do you have CONSULT-II?
Ye s o r N o
Ye s > > G O T O 2 .
No >> GO TO 3.
2.CHECK OVERALL FUNCTION
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select “HO2S1 MNTR (B1)” in “DATA MONITOR” mode with CONSULT-II.
3. Keep the engine speed at 2,000 rpm under no load, and make
sure that the monitors fluctuate between LEAN and RICH more
than five times in 10 seconds.
OK or NG
OK >>INSPECTION END
NG >> GO TO 4.
3.CHECK OVERALL FUNCTION
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Set voltmeter probes between ECM terminal 35 (HO2S1 signal) and engine ground.
3. Keep the engine speed at 2,000 rpm under no load, and make
sure that the voltage fluctuates between 0 to 0.3V and 0.6 to
1.0V more than five times in 10 seconds.
OK or NG
OK >>INSPECTION END
NG >> GO TO 4.
TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
35 W Heated oxygen sensor 1[Engine is running]
●Warm-up condition
●Engine speed is 2,000 rpm.0 - Approximately 1.0V
(Periodically change)
74 BHeated oxygen sensor
ground[Engine is running]
●Idle speedApproximately 0V
1 time: RICH → LEAN → RICH
2 times: RICH → LEAN → RICH → LEAN → RICH
SEF646Y
1 time: 0 - 0.3V → 0.6 - 1.0V → 0 - 0.3V
2 times: 0 - 0.3V → 0.6 - 1.0V → 0 - 0.3V → 0.6 - 1.0V → 0 - 0.3V
MBIB0018E
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EC-650
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HO2S1
4. RETIGHTEN GROUND SCREWS
1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.
>> GO TO 5.
5. RETIGHTEN HEATED OXYGEN SENSOR 1
Loosen and retighten heated oxygen sensor 1.
>> GO TO 6.
6. CHECK FOR EXHAUST GAS LEAK
1. Start engine and run it at idle.
2. Listen for an exhaust gas leak before three way catalyst (manifold).
OK or NG
OK >> GO TO 7.
NG >> Repair or replace.
7. CHECK FOR INTAKE AIR LEAK
Listen for an intake air leak after the mass air flow sensor.
OK or NG
OK >> GO TO 8.
NG >> Repair or replace.
MBIB0095E
Tightening torque: 40 - 60 N·m (4.1 - 6.2 kg-m, 30 - 44 ft-
lb)
MBIB0098E
SEC502D
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8.CHECK HO2S1 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect HO2S1 harness connector.
3. Disconnect E NISSAN ALMERA N16 2003 Electronic Repair Manual HO2S1
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8.CHECK HO2S1 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect HO2S1 harness connector.
3. Disconnect E](/manual-img/5/57350/w960_57350-980.png)
HO2S1
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8.CHECK HO2S1 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect HO2S1 harness connector.
3. Disconnect ECM harness connector.
4. Check harness continuity between ECM terminal 74 and HO2S1
terminal 3. Refer to Wiring Diagram.
5. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 9.
NG >> Repair open circuit or short to ground or short to power
in harness or connectors.
9.CHECK HO2S1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 35 and HO2S1 terminal 2.
Refer to Wiring Diagram.
2. Check harness continuity between ECM terminal 35 or HO2S1 terminal 2 and ground.
Refer to Wiring Diagram.
3. Also check harness for short to power.
OK or NG
OK >> GO TO 10.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
10.CHECK HEATED OXYGEN SENSOR 1 HEATER
Refer to EC-637, "
Component Inspection" .
OK or NG
OK >> GO TO 11.
NG >> Replace malfunctioning heated oxygen sensor 1.
11 . CHECK MASS AIR FLOW SENSOR
Refer to EC-500, "
Component Inspection" .
OK or NG
OK >> GO TO 12.
NG >> Replace mass air flow sensor.
12.CHECK PCV VALVE
Refer to EC-720, "
Component Inspection" .
OK or NG
OK >> GO TO 13.
NG >> Replace PCV valve.
13.CHECK HEATED OXYGEN SENSOR 1
Refer to EC-652, "
Component Inspection" .
OK or NG
OK >> GO TO 14.
NG >> Replace malfunctioning heated oxygen sensor 1.Continuity should exist.
MBIB0091E
Continuity should exist.
Continuity should not exist.
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HO2S1
14. CHECK INTERMITTENT INCIDENT
Refer to EC-485, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS00KKV
HEATED OXYG NISSAN ALMERA N16 2003 Electronic Repair Manual EC-652
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14. CHECK INTERMITTENT INCIDENT
Refer to EC-485, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS00KKV
HEATED OXYG](/manual-img/5/57350/w960_57350-981.png)
EC-652
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HO2S1
14. CHECK INTERMITTENT INCIDENT
Refer to EC-485, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS00KKV
HEATED OXYGEN SENSOR 1
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select “MANU TRIG” and adjust “TRIGGER POINT” to 100% in “DATA MONITOR” mode with CONSULT-
II.
3. Select “HO2S1 (B1)” and “HO2S1 MNTR (B1)”.
4. Hold engine speed at 2,000 rpm under no load during the follow-
ing steps.
5. Touch “RECORD” on CONSULT-II screen.
6. Check the following.
●“HO2S1 MNTR (B1)” in “DATA MONITOR” mode changes
from “RICH” to “LEAN” to “RICH” 5 times in 10 seconds.
5 times (cycles) are counted as shown at right.
●“HO2S1 (B1)” voltage goes above 0.6V at least once.
●“HO2S1 (B1)” voltage goes below 0.3V at least once.
●“HO2S1 (B1)” voltage never exceeds 1.0V.
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.
SEF646Y
SEF217YA
SEF648Y
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Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Set voltmeter probes between ECM terminal 35 (HO2S NISSAN ALMERA N16 2003 Electronic Repair Manual HO2S1
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Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Set voltmeter probes between ECM terminal 35 (HO2S](/manual-img/5/57350/w960_57350-982.png)
HO2S1
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Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Set voltmeter probes between ECM terminal 35 (HO2S1 signal) and engine ground.
3. Check the following with engine speed held at 2,000 rpm con-
stant under no load.
●The voltage fluctuates between 0 to 0.3V and 0.6 to 1.0V
more than 5 times within 10 seconds.
●The maximum voltage is over 0.6V at least one time.
●The minimum voltage is below 0.3V at least one time.
●The voltage never exceeds 1.0V.
1 time: 0 - 0.3V → 0.6 - 1.0V → 0 - 0.3V
2 times: 0 - 0.3V → 0.6 - 1.0V → 0 - 0.3V → 0.6 - 1.0V
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.
Removal and InstallationEBS00KKW
HEATED OXYGEN SENSOR 1
Refer to EM-19, "EXHAUST MANIFOLD AND CATALYTIC CONVERTER" .
MBIB0018E
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HO2S2
HO2S2
PFP:226A0
Component DescriptionEBS00KKX
The heated oxygen sensor 2, after three way catalyst (manifold),
monitors the oxygen level in the exhaust ga NISSAN ALMERA N16 2003 Electronic Repair Manual EC-654
[QG (WITHOUT EURO-OBD)]
HO2S2
HO2S2
PFP:226A0
Component DescriptionEBS00KKX
The heated oxygen sensor 2, after three way catalyst (manifold),
monitors the oxygen level in the exhaust ga](/manual-img/5/57350/w960_57350-983.png)
EC-654
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HO2S2
HO2S2
PFP:226A0
Component DescriptionEBS00KKX
The heated oxygen sensor 2, after three way catalyst (manifold),
monitors the oxygen level in the exhaust gas.
Even if switching characteristics of the heated oxygen sensor 1 are
shifted, the air-fuel ratio is controlled to stoichiometric, by the signal
from the heated oxygen sensor 2.
This sensor is made of ceramic zirconia. The zirconia generates volt-
age from approximately 1V in richer conditions to 0V in leaner condi-
tions.
Under normal conditions the heated oxygen sensor 2 is not used for
engine control operation.
CONSULT-II Reference Value in Data Monitor ModeEBS00KKY
Specification data are reference values.
SEF327R
MONITOR ITEM CONDITION SPECIFICATION
HO2S2 (B1)
●Engine: After warming up
●Keeping the engine speed
between 3,500 and 4,000 rpm
for one minute and at idle for
one minute under no loadRevving engine from idle to 3,000
rpm quickly.0 - 0.3V ←→ Approx. 0.6 - 1.0V
HO2S2 MNTR (B1)
●Engine: After warming up
●Keeping the engine speed
between 3,500 and 4,000 rpm
for one minute and at idle for
one minute under no loadRevving engine from idle to 3,000
rpm quickly.LEAN ←→ RICH