2003 NISSAN X-TRAIL Electronic Repair Manual

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Page 1297 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual DTC P0138 HO2S2
EC-183
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Wiring DiagramEBS00B4W
TBWA0061E

Page 1298 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual EC-184
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DTC P0138 HO2S2
Diagnostic Procedure
EBS00B4X
1.RETIGHTEN GROUND SCREWS
1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.
>> GO TO 2.
2.CLEAR

Page 1299 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual DTC P0138 HO2S2
EC-185
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3.CHECK HO2S2 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect heated oxygen sensor 2 harness co

Page 1300 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual EC-186
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DTC P0138 HO2S2
3. Select “FUEL INJECTION” in “ACTIVE TEST” mode, and select
“HO2S2 (B1)” as the monitor item with CONSULT-II.
4. Check “HO2S2 (B1)” at idle

Page 1301 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual DTC P0139 HO2S2
EC-187
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DTC P0139 HO2S2PFP:226A0
Component DescriptionEBS00B50
The heated oxygen sensor 2, after three way catalyst, monitors the
oxygen l

Page 1302 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual EC-188
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DTC P0139 HO2S2
DTC Confirmation Procedure
EBS00B54
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
l“COMPLETED” will appear on CONSULT-II screen when all tests �

EC-188
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DTC P0139 HO2S2
DTC Confirmation Procedure
EBS00B54
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
l“COMPLETED” will appear on CONSULT-II screen when all tests “COND1”, “COND2” and
“COND3” are completed.
lIf “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch “OFF” and
wait at least 10 seconds before conducting the next test.
TESTING CONDITION:
Never stop engine during this procedure. If the engine is stopped, retry this procedure from step 2 in
“Procedure for COND1”.
WITH CONSULT-II
Procedure for COND1
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 “HO2S2 (B1) P0139” of “HO2S2” in “DTC WORK SUPPORT” mode
with CONSULT-II.
4. Touch “START”.
5. Start engine and let it idle for at least 30 seconds.
6. Rev engine up to 2,000 rpm 2 or 3 times quickly under no load.
If “COMPLETED” appears on CONSULT-II screen, go to step 2 in “Procedure for COND3”.
If “COMPLETED” does not appear on CONSULT-II screen, go to the following step.
7. Drive vehicle at a speed of more than 70km/h (43 MPH) for 2 consecutive minutes.
8. When the following conditions are met, “TESTING” will be displayed at “COND1” on the CONSULT-II
screen. Maintain the conditions continuously until “TESTING” changes to “COMPLETED”. (It will take
approximately 60 seconds.)
NOTE:
lIf “TESTING” is not displayed after 5 minutes, retry from step 2 in “Procedure for COND1”.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0139
0139Heated oxygen sensor
2 circuit slow responseIt takes more time for the sensor to respond
between rich and lean than the specified time.
lHarness or connectors
(The sensor circuit is open or shorted)
lHeated oxygen sensor 2
lFuel pressure
lInjectors
lIntake air leaks
ENG SPEED More than 1,000 rpm
B/FUEL SCHDL More than 1.0 msec
COOLANT TEMP/S 70 - 105°C
Selector level Suitable position
PBIB0552E

Page 1303 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual DTC P0139 HO2S2
EC-189
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lIf “COMPLETED” already appears at “COND2” on CONSULT-II screen before “Procedure for
COND2” is conducted, it is unnec

DTC P0139 HO2S2
EC-189
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lIf “COMPLETED” already appears at “COND2” on CONSULT-II screen before “Procedure for
COND2” is conducted, it is unnecessary to conduct step 1 in “Procedure for COND2”.
Procedure for COND2
1. While driving, release accelerator pedal completely with “OD”
OFF (A/T models only) from the above condition [step 8] until
“INCOMPLETE” at “COND2” on CONSULT-II screen has turned
to “COMPLETED”. (It will take approximately 4 seconds.)
NOTE:
If “COMPLETED” already appears at “COND3” on CONSULT-II
screen before “Procedure for COND3” is conducted, it is unnec-
essary to conduct step 1 in “Procedure for COND3”.
Procedure for COND3
1. Stop vehicle and let it idle until “INCOMPLETE” of “COND3” on
CONSULT-II screen has turned to “COMPLETED”. (It will take a
maximum of approximately 6 minutes.)
2. Make sure that “OK” is displayed after touching “SELF-DIAG
RESULTS”.
If "NG" is displayed, refer toEC-191, "
Diagnostic Procedure".
Overall Function CheckEBS00B55
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 drive vehicle at a speed of more than 70 km/h (43 MPH) for 2 consecutive minutes.
2. Stop vehicle with engine running.
3. Set voltmeter probes between ECM terminal 95 [HO2S2 (B1) signal] and engine ground.
4. 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 change at more than 0.06V for 1 second
during this procedure.
If the voltage can be confirmed in step 4, step 5 is not nec-
essary.
5. 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), 3rd gear position (M/T).
The voltage should change at more than 0.06V for 1 second
during this procedure.
6. If NG, go toEC-191, "
Diagnostic Procedure".
PBIB0553E
SEF668Y
PBIB0550E

Page 1304 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual EC-190
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DTC P0139 HO2S2
Wiring Diagram
EBS00B56
TBWA0061E

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