2003 NISSAN X-TRAIL Electronic Repair Manual

sport mode radiator cap wiper blades low oil pressure inflation pressure maintenance schedule

Page 1409 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual DTC P1144 HO2S1
EC-295
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6. Check the following.
l“HO2S1 MNTR (B1)” in “DATA MONITOR” mode changes
from “RICH” to “LEAN” to “RICH” 5 ti

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NISSAN X-TRAIL 2003 Electronic Repair Manual EC-296
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DTC P1146 HO2S2
DTC P1146 HO2S2
PFP:226A0
Component DescriptionEBS00BBV
The heated oxygen sensor 2, after three way catalyst, monitors the
oxygen level in the exhaust gas o

EC-296
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DTC P1146 HO2S2
DTC P1146 HO2S2
PFP:226A0
Component DescriptionEBS00BBV
The heated oxygen sensor 2, after three way catalyst, monitors the
oxygen level in the exhaust gas on each bank.
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 ModeEBS00BBW
Specification data are reference values.
ECM Terminals and Reference ValueEBS00BBX
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.
On Board Diagnosis LogicEBS00BBY
The heated oxygen sensor 2 has a much longer switching time
between rich and lean than the heated oxygen sensor 1. The oxygen
storage capacity before the three way catalyst causes the longer
switching time. To judge the malfunctions of heated oxygen sensor
2, ECM monitors whether the minimum voltage of sensor is suffi-
ciently low during the various driving condition such as fuel-cut.
SEF327R
MONITOR ITEM CONDITION SPECIFICATION
HO2S2 (B1)
lEngine: After warming upRevving engine from idle to 3,000
rpm quickly.0 - 0.3V¬®Approx. 0.6 - 1.0V
HO2S2 MNTR (B1)
lEngine: After warming upRevving engine from idle to 3,000
rpm quickly.LEAN¬®RICH
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
95 OR/BHeated oxygen sen-
sor 2[Engine is running]
lWarm-up condition
lEngine speed is 2,000 rpm.0 - Approximately 1.0V
PBIB0554E
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1146
11 4 6Heated oxygen sensor
2 minimum voltage
monitoringThe minimum voltage from the sensor is not
reached to the specified voltage.
lHarness or connectors
(The sensor circuit is open or shorted)
lHeated oxygen sensor 2
lFuel pressure
lInjectors

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NISSAN X-TRAIL 2003 Electronic Repair Manual DTC P1146 HO2S2
EC-297
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DTC Confirmation ProcedureEBS00BBZ
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
l"COMPLETED" will appear on CONSULT-II scr

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NISSAN X-TRAIL 2003 Electronic Repair Manual EC-298
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DTC P1146 HO2S2
Procedure for COND2
1. While driving, release accelerator pedal completed with "OD"
OFF (A/T models only) from the above condition [step 8] until
"INCOMPLET

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NISSAN X-TRAIL 2003 Electronic Repair Manual DTC P1146 HO2S2
EC-299
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Wiring DiagramEBS00BC1
TBWA0061E

Page 1414 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual EC-300
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DTC P1146 HO2S2
Diagnostic Procedure
EBS00BC2
1.RETIGHTEN GROUND SCREWS
1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.
>> GO TO 2.
2.CLEAR

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NISSAN X-TRAIL 2003 Electronic Repair Manual DTC P1146 HO2S2
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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

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NISSAN X-TRAIL 2003 Electronic Repair Manual EC-302
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DTC P1146 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

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