Page 1697 of 3066
![NISSAN X-TRAIL 2003 Electronic Repair Manual HO2S1
EC-583
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
Diagnostic ProcedureEBS00B8M
1.CHECK OVERALL FUNCTION
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. NISSAN X-TRAIL 2003 Electronic Repair Manual HO2S1
EC-583
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
Diagnostic ProcedureEBS00B8M
1.CHECK OVERALL FUNCTION
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2.](/manual-img/5/57402/w960_57402-1696.png)
HO2S1
EC-583
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
Diagnostic ProcedureEBS00B8M
1.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.
Wi t h ou t C O N S U LT-I I
1. Start engine and warm it up to normal operating temperature.
2. Stop engine and wait at least 10 seconds.
3. Set ECM in "Diagnostic test mode - II (Heated oxygen sensor 1 monitor)".
Refer toEC-406, "
DIAGNOSTIC TEST MODE II—HEATED OXYGEN SENSOR 1 MONITOR".
4. Keep the engine speed at 2,000 rpm under no load, and make
sure that the MI comes ON more than five times in 10 seconds.
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
2.INSPECTION START
1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.
>> GO TO 3. 1time:RICH®LEAN®RICH
2 times: RICH®LEAN®RICH®LEAN®RICH
SEF820Y
SAT652J
PBIB0494E
Page 1698 of 3066
![NISSAN X-TRAIL 2003 Electronic Repair Manual EC-584
[QR (WITHOUT EURO-OBD)]
HO2S1
3.CHECK HO2S1 GROUND CIRCUIT FOR OPEN AND SHORT
1. Disconnect HO2S1 harness connector.
2. Check harness continuity between HO2S1 terminal 3 and
ground.
Refer to Wi NISSAN X-TRAIL 2003 Electronic Repair Manual EC-584
[QR (WITHOUT EURO-OBD)]
HO2S1
3.CHECK HO2S1 GROUND CIRCUIT FOR OPEN AND SHORT
1. Disconnect HO2S1 harness connector.
2. Check harness continuity between HO2S1 terminal 3 and
ground.
Refer to Wi](/manual-img/5/57402/w960_57402-1697.png)
EC-584
[QR (WITHOUT EURO-OBD)]
HO2S1
3.CHECK HO2S1 GROUND CIRCUIT FOR OPEN AND SHORT
1. Disconnect HO2S1 harness connector.
2. Check harness continuity between HO2S1 terminal 3 and
ground.
Refer to Wiring Diagram.
3. Also check harness for short to power.
OK or NG
OK >> GO TO 4.
NG >> Repair open circuit or short to power in harness or con-
nectors.
4.CHECK HO2S1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 92 and HO2S1 terminal 2.
Refer to Wiring Diagram.
3. Check harness continuity between ECM terminal 92 or HO2S1 terminal 2 and ground.
Refer to Wiring Diagram.
4. 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 1
Refer toEC-584, "
Component Inspection".
OK or NG
OK >> GO TO 6.
NG >> Replace heated oxygen sensor 1.
6.CHECK INTERMITTENT INCIDENT
Refer toEC-453, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT".
>>INSPECTION END
Component InspectionEBS00B8N
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.Continuity should exist.
PBIB0500E
Continuity should exist.
Continuity should not exist.
Page 1699 of 3066
![NISSAN X-TRAIL 2003 Electronic Repair Manual HO2S1
EC-585
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
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. To NISSAN X-TRAIL 2003 Electronic Repair Manual HO2S1
EC-585
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
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. To](/manual-img/5/57402/w960_57402-1698.png)
HO2S1
EC-585
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
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.
l“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.
l“HO2S1 (B1)” voltage goes above 0.6V at least once.
l“HO2S1 (B1)” voltage goes below 0.3V at least once.
l“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.
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Set voltmeter probes between ECM terminal 92 [HO2S1 (B1) signal] and engine ground.
3. Check the following with engine speed held at 2,000 rpm con-
stant under no load.
lThe voltage fluctuates between 0 to 0.3V and 0.6 to 1.0V
more than 5 times within 10 seconds.
lThe maximum voltage is over 0.6V at least one time.
lThe minimum voltage is below 0.3V at least one time.
lThe voltage never exceeds 1.0V.
1 time: 0 - 0.3V®0.6 - 1.0V®0 - 0.3V
2times: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.
SEF646Y
SEF217YA
SEF648Y
PBIB0543E
Page 1700 of 3066
EC-586
[QR (WITHOUT EURO-OBD)]
HO2S1
Removal and Installation
EBS00B8O
HEATED OXYGEN SENSOR 1
Refer toEM-22, "EXHAUST MANIFOLD AND THREE WAY CATALYST".
Page 1701 of 3066
![NISSAN X-TRAIL 2003 Electronic Repair Manual HO2S2
EC-587
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
HO2S2PFP:226A0
Component DescriptionEBS00B8P
The heated oxygen sensor 2, after three way catalyst, monitors the
oxygen level in the exhau NISSAN X-TRAIL 2003 Electronic Repair Manual HO2S2
EC-587
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
HO2S2PFP:226A0
Component DescriptionEBS00B8P
The heated oxygen sensor 2, after three way catalyst, monitors the
oxygen level in the exhau](/manual-img/5/57402/w960_57402-1700.png)
HO2S2
EC-587
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
HO2S2PFP:226A0
Component DescriptionEBS00B8P
The heated oxygen sensor 2, after three way catalyst, monitors the
oxygen level in the exhaust gas on each bank.
Evenifswitchingcharacteristicsoftheheatedoxygensensor1are
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 ModeEBS00B8Q
Specification data are reference values.
ECM Terminals and Reference ValueEBS00B8R
Specification data are reference values and are measured between each terminal and body 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.
SEF327R
MONITOR ITEM CONDITION SPECIFICATION
HO2S2 (B1)
lEngine: After warming upRevvingenginefromidleto3,000
rpm quickly.0-0.3V¨Approx. 0.6 - 1.0V
HO2S2 MNTR (B1)
lEngine: After warming upRevvingenginefromidleto3,000
rpm quickly.LEAN¨RICH
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
95 OR/BHeated oxygen sen-
sor 2[Engineisrunning]
lWarm-up condition
lEngine speed is 2,000 rpm.0 - Approximately 1.0V
Page 1702 of 3066
EC-588
[QR (WITHOUT EURO-OBD)]
HO2S2
Wiring Diagram
EBS00B8S
TBWA0076E
Page 1703 of 3066
![NISSAN X-TRAIL 2003 Electronic Repair Manual HO2S2
EC-589
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
Diagnostic ProcedureEBS00B8T
1.CHECK OVERALL FUNCTION-I
1. Start engine and drive the vehicle at over 70 km/h (43 MPH) for 2 consecutive NISSAN X-TRAIL 2003 Electronic Repair Manual HO2S2
EC-589
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
Diagnostic ProcedureEBS00B8T
1.CHECK OVERALL FUNCTION-I
1. Start engine and drive the vehicle at over 70 km/h (43 MPH) for 2 consecutive](/manual-img/5/57402/w960_57402-1702.png)
HO2S2
EC-589
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
Diagnostic ProcedureEBS00B8T
1.CHECK OVERALL FUNCTION-I
1. Start engine and drive the vehicle at over 70 km/h (43 MPH) for 2 consecutive minutes.
2. Stop vehicle and keep the engine running.
3. Set voltmeter probes between ECM terminal 95 (HO2S2 signal) and ground.
4. Check the voltage while revving up to 4,000 rpm under no load at least 10 times.
(Depress and release the accelerator pedal as quickly as possi-
ble.)
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
2.CHECK OVERALL FUNCTION-II
Keep engine at idle for 10 minutes, then check the voltage between
ECM terminal 95 and ground, or check voltage when coasting 80
km/h (50 MPH) in 3rd gear (M/T), "D" position with "OD" OFF (A/T).
OK or NG
OK >>INSPECTION END
NG >> GO TO 3.
3.RETIGHTEN GROUND SCREWS
1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.
>> GO TO 4. The voltage does not remain in the range of 0.2 -0.4V
PBIB0675E
The voltage does not remain in the range of 0.2 -0.4V
PBIB0675E
PBIB0494E
Page 1704 of 3066
![NISSAN X-TRAIL 2003 Electronic Repair Manual EC-590
[QR (WITHOUT EURO-OBD)]
HO2S2
4.CHECK HO2S2 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect heated oxygen sensor 2 harness connector.
3. Check harness continu NISSAN X-TRAIL 2003 Electronic Repair Manual EC-590
[QR (WITHOUT EURO-OBD)]
HO2S2
4.CHECK HO2S2 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect heated oxygen sensor 2 harness connector.
3. Check harness continu](/manual-img/5/57402/w960_57402-1703.png)
EC-590
[QR (WITHOUT EURO-OBD)]
HO2S2
4.CHECK HO2S2 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect heated oxygen sensor 2 harness connector.
3. Check harness continuity between HO2S2 terminal 3 and
engine ground.
Refer to Wiring Diagram.
4. Also check harness for short to power.
OK or NG
OK >> GO TO 5.
NG >> Repair open circuit or short to power in harness or con-
nectors.
5.CHECK HO2S2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 95 and HO2S2 terminal 2.
Refer to Wiring Diagram.
3. Check harness continuity between ECM terminal 95 or HO2S2 terminal 2 and ground.
Refer to Wiring Diagram.
4. Also check harness for short to ground or short to power.
OK or NG
OK >> GO TO 6.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
6.CHECK HEATED OXYGEN SENSOR 2
Refer toEC-590, "
Component Inspection".
OK or NG
OK >> GO TO 7.
NG >> Replace heated oxygen sensor 2.
7.CHECK INTERMITTENT INCIDENT
Refer toEC-453, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT".
>>INSPECTION END
Component InspectionEBS00B8U
HEATED OXYGEN SENSOR 2
With CONSULT-II
1. Start engine and drive vehicle at a speed of more than 70 km/h (43 MPH) for 2 consecutive minutes.
2. Stop vehicle with engine running.Continuity should exist.
PBIB0500E
Continuity should exist.
Continuity should not exist.