2003 NISSAN X-TRAIL Electronic Repair Manual

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Page 1233 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual DTC P0011 IVT CONTROL
EC-119
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EC
2. Select "DATA MONITOR" mode with CONSULT-II.
3. Maintain the following conditions for at least 20 consecutive sec-
onds.
4

Page 1234 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual EC-120
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DTC P0031, P0032 HO2S1 HEATER
DTC P0031, P0032 HO2S1 HEATER
PFP:22690
DescriptionEBS00B24
SYSTEM DESCRIPTION
The ECM performs ON/OFF duty control of the heated oxygen senso

Page 1235 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual DTC P0031, P0032 HO2S1 HEATER
EC-121
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On Board Diagnosis LogicEBS00B27
DTC Confirmation ProcedureEBS00B28
NOTE:
If “DTC Confirmation Procedure” has be

DTC P0031, P0032 HO2S1 HEATER
EC-121
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On Board Diagnosis LogicEBS00B27
DTC Confirmation ProcedureEBS00B28
NOTE:
If “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:
Before performing the following procedure, confirm that battery voltage is between 10.5V and 16V at
idle.
WITH CONSULT-II
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 “DATA MONITOR” mode
with CONSULT-II.
4. Start engine and run it for at least 6 seconds at idle speed.
5. f 1st trip DTC is detected, go toEC-123, "
Diagnostic Procedure"
.
WITH GST
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch "OFF" and wait at least 10 seconds.
3. Start engine and run it for at least 6 seconds at idle speed.
4. Turn ignition switch “OFF” and wait at least 10 seconds.
5. Start engine and run it for at least 6 seconds at idle speed.
6. Select “MODE 3” with GST.
7. If DTC is detected, go toEC-123, "
Diagnostic Procedure".
lWhen using GST, “DTC Confirmation Procedure” should be performed twice as much as when
using CONSULT-II because GST cannot display MODE 7 (1st trip DTC) concerning this diagnosis.
Therefore, using CONSULT-II is recommended.
DTC No.Trouble diagnosis
nameDTC detecting condition Possible cause
P0031
0031Heated oxygen
sensor 1 heater
control circuit lowThe current amperage in the heated oxygen
sensor 1 heater circuit is out of the normal
range.
(An excessively low voltage signal is sent to
ECM through the heated oxygen sensor 1
heater.)
lHarness or connectors
(The heated oxygen sensor 1 heater circuit is
open or shorted.)
lHeater oxygen sensor 1 heater
P0032
0032Heated oxygen
sensor 1 heater
control circuit highThe current amperage in the heated oxygen
sensor 1 heater circuit is out of the normal
range.
(An excessively high voltage signal is sent to
ECM through the heated oxygen sensor 1
heater.)
lHarness or connectors
(The heated oxygen sensor 1 heater circuit is
shorted.)
lHeater oxygen sensor 1 heater
SEF058Y

Page 1236 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual EC-122
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DTC P0031, P0032 HO2S1 HEATER
Wiring Diagram
EBS00B29
TBWA0060E

Page 1237 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual DTC P0031, P0032 HO2S1 HEATER
EC-123
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Diagnostic ProcedureEBS00B2A
1.CHECK HO2S1 POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect hea

Page 1238 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual EC-124
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DTC P0031, P0032 HO2S1 HEATER
4.CHECK HEATED OXYGEN SENSOR 1 HEATER
Refer toEC-124, "
Component Inspection".
OK or NG
OK >> GO TO 5.
NG >> Replace heated oxygen sensor 1.
5

Page 1239 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual DTC P0037, P0038 HO2S2 HEATER
EC-125
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DTC P0037, P0038 HO2S2 HEATERPFP:226A0
DescriptionEBS00B2D
SYSTEM DESCRIPTION
The ECM performs ON/OFF control of the

DTC P0037, P0038 HO2S2 HEATER
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DTC P0037, P0038 HO2S2 HEATERPFP:226A0
DescriptionEBS00B2D
SYSTEM DESCRIPTION
The ECM performs ON/OFF control of the heated oxygen sensor 2 heater corresponding to the engine speed.
OPERATION
CONSULT-II Reference Value in Data Monitor ModeEBS00B2E
Specification data are reference values.
ECM Terminals and Reference ValueEBS00B2F
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 LogicEBS00B2G
Sensor Input Signal to ECM ECM function Actuator
Camshaft position sensor (PHASE)
Engine speedHeated oxygen sensor 2
heater controlHeated oxygen sensor 2 heater
Crankshaft position sensor (POS)
Engine speed rpm Heated oxygen sensor 2 heater
Above 3,800 OFF
Below 3,800 ON
MONITOR ITEM CONDITION SPECIFICATION
HO2S2 HTR (B1)
lEngine speed: Below 3,800 rpm [After driving for 2 minutes at a speed
of 70 km/h (43 MPH) or more]ON
lEngine speed: Above 3,800 rpm OFF
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
4PU/RHeated oxygen sen-
sor 2 heater[Engineisrunning]
lEngine speed is below 3,800 rpm.
lAfter driving for 2 minutes at a speed of 70 km/h
(43MPH)ormore.0-1.0V
[Ignition switch “ON”]
lEngine stopped
[Engineisrunning]
lEngine speed is above 3,800 rpm.BATTERY VOLTAGE
(11 - 14V)
DTC No.Trouble diagnosis
nameDTC detecting condition Possible cause
P0037
0037Heated oxygen
sensor 2 heater
control circuit lowThe current amperage in the heated oxygen sen-
sor 2 heater circuit is out of the normal range.
(An excessively low voltage signal is sent to ECM
through the heated oxygen sensor 1 heater.)
lHarness or connectors
(The heated oxygen sensor 1 heater circuit is
open or shorted.)
lHeater oxygen sensor 1 heater
P0038
0038Heated oxygen
sensor 2 heater
control circuit highThe current amperage in the heated oxygen sen-
sor 2 heater circuit is out of the normal range.
(An excessively high voltage signal is sent to
ECM through the heated oxygen sensor 1
heater.)
lHarness or connectors
(The heated oxygen sensor 1 heater circuit is
shorted.)
lHeater oxygen sensor 1 heater

Page 1240 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual EC-126
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DTC P0037, P0038 HO2S2 HEATER
DTC Confirmation Procedure
EBS00B2H
NOTE:
If “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch “OF

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