2005 NISSAN X-TRAIL heater

TROUBLE DIAGNOSIS
EC-101
[QR (WITH EURO-OBD)]
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84 L/YElectrical load signal
(Headlamp signal)[Ignition switch: ON]

Lighting switch: 2ND position (placed in LOW
position for models with Xenon headlamp)BATTERY VOLTAGE
(11 - 14V)
[Ignition switch: ON]

Lighting switch: OFFApproximately 0V
85 LG DATA link connector[Ignition switch: ON]

CONSULT-II or GST is disconnectedBATTERY VOLTAGE
(11 - 14V)
86 GY/R CAN communication line[Ignition switch: ON]1.0 - 2.5V
89 G Cooling fan relay (High)[Engine is running]

Cooling fan is not operatingBATTERY VOLTAGE
(11 - 14V)
[Engine is running]

Cooling fan is high speed operating0 - 1.0V
90 RSensor power supply
(Accelerator pedal position
sensor 1)[Ignition switch: ON]Approximately 5V
91 BR/YSensor power supply
(Accelerator pedal position
sensor 2)[Ignition switch: ON]Approximately 5V
93 BRElectrical load signal
(Rear window defogger
signal)[Ignition switch: ON]

Rear window defogger switch: ONBATTERY VOLTAGE
(11 - 14V)
[Ignition switch: ON]

Rear window defogger switch: OFFApproximately 0V
94 G/R CAN communication line[Ignition switch: ON]2.5 - 4.0V
96 LG/B Heater fan switch[Engine is running]

Heater fan switch: ONApproximately 0V
[Engine is running]

Heater fan switch: OFFBATTERY VOLTAGE
(11 - 14V)
97 PU Cooling fan relay (Low)[Ignition switch: ON]

Cooling fan is not operatingBATTERY VOLTAGE
(11 - 14V)
[Ignition switch: ON]

Cooling fan is operating0 - 1.0V
98 B/WAccelerator pedal position
sensor 2[Ignition switch: ON]

Engine stopped

Accelerator pedal: Fully released0.15 - 0.6V
[Ignition switch: ON]

Engine stopped

Accelerator pedal: Fully depressed1.95 - 2.4V
99*
1W/R ASCD steering switch[Ignition switch: ON]

ASCD steering switch: OFFApproximately 4V
[Ignition switch: ON]

MAIN switch: PressedApproximately 0V
[Ignition switch: ON]

CANCEL switch: PressedApproximately 1V
[Ignition switch: ON]

RESUME/ACCELERATE switch: PressedApproximately 3V
[Ignition switch: ON]

SET/COAST switch: PressedApproximately 2V TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)

EC-104
[QR (WITH EURO-OBD)]
TROUBLE DIAGNOSIS

ENGINE CONTROL COMPONENT PARTS/CONTROL SYSTEMS APPLICATION
X: ApplicableItemDIAGNOSTIC TEST MODE
WORK
SUP-
PORTSELF-DIAGNOS-
TIC RESULTS
DATA
MONI-
TORDATA
MONI-
TOR
(SPEC)ACTIVE
TESTDTC & SRT
CONFIRMATION
DTC*
1FREEZE
FRAME
DATA*
2
SRT
STATUSDTC
WORK
SUP-
PORT
ENGINE CONTROL COMPONENT PARTS
INPUT
Crankshaft position sensor (POS)××××
Camshaft position sensor (PHASE)×××
Mass air flow sensor×××
Engine coolant temperature sensor×××××
Heated oxygen sensor 1×××××
Heated oxygen sensor 2×××××
Vehicle speed signal××××
Accelerator pedal position sensor×××
Throttle position sensor×××
Intake air temperature sensor××××
Knock sensor×
Refrigerant pressure sensor××
Closed throttle position switch
(accelerator pedal position sensor
signal)××
Air conditioner switch××
Park/neutral position (PNP) switch×××
Stop lamp switch×××
Power steering pressure sensor×××
Battery voltage××
Electrical load signal××
ASCD steering switch*
3×××
ASCD brake switch*
3×××
ASCD clutch switch*
3×××
ENGINE CONTROL COMPONENT PARTS
OUTPUT
Fuel injector×××
Power transistor (Ignition timing)×××
Throttle control motor relay×××
Throttle control motor×
EVAP canister purge volume control
solenoid valve××××
Air conditioner relay××
Fuel pump relay××××
Cooling fan relay××××
Heated oxygen sensor 1 heater××××
Heated oxygen sensor 2 heater××××
Intake valve timing control solenoid
valve××××
VIAS control solenoid valve×××
Calculated load value×××

EC-108
[QR (WITH EURO-OBD)]
TROUBLE DIAGNOSIS

INT/A TEMP SE [°C]
or [°F]××
The intake air temperature (determined by the
signal voltage of the intake air temperature
sensor) is indicated.
START SIGNAL
[ON/OFF]××

Indicates start signal status [ON/OFF] com-
puted by the ECM according to the signals of
engine speed and battery voltage.
After starting the engine, [OFF] is
displayed regardless of the
starter signal.
CLSD THL POS
[ON/OFF]××

Indicates idle position [ON/OFF] computed by
the ECM according to the accelerator pedal
position sensor signal.
AIR COND SIG
[ON/OFF]××

Indicates [ON/OFF] condition of the air condi-
tioner switch as determined by the air condi-
tioner signal.
P/N POSI SW
[ON/OFF]××

Indicates [ON/OFF] condition from the park/
neutral position (PNP) switch signal.
PW/ST SIGNAL
[ON/OFF]××

[ON/OFF] condition of the power steering
pressure sensor as determined by the power
steering pressure sensor is indicated.
LOAD SIGNAL [ON/
OFF]××

Indicates [ON/OFF] condition from the electri-
cal load signal.
ON: Rear window defogger switch is ON and/
or lighting switch is in 2nd position (placed in
LOW position for models with Xenon head-
lamp).
OFF: Both rear window defogger switch and
lighting switch are OFF.
IGNITION SW
[ON/OFF]×

Indicates [ON/OFF] condition from ignition
switch.
HEATER FAN SW
[ON/OFF]×

Indicates [ON/OFF] condition from the heater
fan switch signal.
BRAKE SW
[ON/OFF]×

Indicates [ON/OFF] condition from the stop
lamp switch signal.
INJ PULSE-B1
[msec]×

Indicates the actual fuel injection pulse width
compensated by ECM according to the input
signals.
When the engine is stopped, a
certain computed value is indi-
cated.
IGN TIMING [BTDC]×

Indicates the ignition timing computed by ECM
according to the input signals.
When the engine is stopped, a
certain value is indicated.
CAL/LD VALUE [%]

“Calculated load value” indicates the value of
the current airflow divided by peak airflow.
MASS AIRFLOW
[g·m/s]

Indicates the mass airflow computed by ECM
according to the signal voltage of the mass air
flow sensor.
PURG VOL C/V [%]

Indicates the EVAP canister purge volume
control solenoid valve control value computed
by the ECM according to the input signals.

The opening becomes larger as the value
increases.
INT/V TIM (B1)
[°CA]

Indicates [°CA] of intake camshaft advanced
angle.
INT/V SOL (B1) [%]

The control value of the intake valve timing
control solenoid valve (determined by ECM
according to the input signal) is indicated.

The advance angle becomes larger as the
value increases Monitored item
[Unit]ECM
INPUT
SIGNALSMAIN
SIG-
NALSDescription Remarks

TROUBLE DIAGNOSIS
EC-109
[QR (WITH EURO-OBD)]
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VIAS S/V*
[ON/OFF]

The control condition of the VIAS control sole-
noid valve (determined by ECM according to
the input signals) is indicated.
ON: VIAS control solenoid valve is operating.
OFF: VIAS control solenoid valve is not oper-
ating.
AIR COND RLY
[ON/OFF]×

The air conditioner relay control condition
(determined by ECM according to the input
signals) is indicated.
FUEL PUMP RLY
[ON/OFF]×

Indicates the fuel pump relay control condition
determined by ECM according to the input sig-
nals.
THRTL RELAY [ON/
OFF]×

Indicates the throttle control motor relay con-
trol condition determined by the ECM accord-
ing to the input signals.
COOLING FAN
[HI/LOW/OFF]

Indicates the condition of the cooling fan
(determined by ECM according to the input
signals).
HI: High speed operation
LOW: Low speed operation
OFF: Stop
HO2S1 HTR (B1)
[ON/OFF]

Indicates [ON/OFF] condition of heated oxy-
gen sensor 1 heater determined by ECM
according to the input signals.
HO2S2 HTR (B1)
[ON/OFF]

Indicates [ON/OFF] condition of heated oxy-
gen sensor 2 heater determined by ECM
according to the input signals.
IDL A/V LEARN
[YET/CMPLT]

Display the condition of idle air volume learn-
ing
YET: Idle Air Volume Learning has not been
performed yet.
CMPLT: Idle Air Volume Learning has already
been performed successfully.
TRVL AFTER MIL
[km] or [mile]

Distance traveled while MI is activated.
AC PRESS SEN [V]×

The signal voltage from the refrigerant pres-
sure sensor is displayed.
VHCL SPEED SE*
[km/h] or [mph]

The vehicle speed computed from the vehicle
speed signal sent from TCM is displayed.
SET VHCL SPD*
[km/h] or [mph]

The preset vehicle speed is displayed.
MAIN SW*
[ON/OFF]

Indicates [ON/OFF] condition from MAIN
switch signal.
CANCEL SW*
[ON/OFF]

Indicates [ON/OFF] condition from CANCEL
switch signal.
RESUME/ACC SW*
[ON/OFF]

Indicates [ON/OFF] condition from RESUME/
ACCELERATE switch signal.
SET SW*
[ON/OFF]

Indicates [ON/OFF] condition from SET/
COAST switch signal.
BRAKE SW1*
[ON/OFF]

Indicates [ON/OFF] condition from ASCD
brake switch signal.
BRAKE SW2*
[ON/OFF]

Indicates [ON/OFF] condition of stop lamp
switch signal. Monitored item
[Unit]ECM
INPUT
SIGNALSMAIN
SIG-
NALSDescription Remarks

EC-116
[QR (WITH EURO-OBD)]
TROUBLE DIAGNOSIS

LOAD SIGNAL
Ignition switch: ONRear window defogger switch is ON
and/or lighting switch is in 2nd (placed
in LOW position for models with
Xenon headlamp).ON
Rear window defogger switch is OFF
and lighting switch is OFF.OFF
IGNITION SW

Ignition switch: ON → OFF → ON ON → OFF → ON
HEATER FAN SW

Ignition switch: ONHeater fan is operating. ON
Heater fan is not operating OFF
BRAKE SW

Ignition switch: ONBrake pedal: Fully released OFF
Brake pedal: Slightly depressed ON
INJ PULSE-B1

Engine: After warming up

Air conditioner switch: OFF

Shift lever: P or N (A/T), Neutral
(M/T)

No loadIdle 2.0 - 3.0 msec
2,000 rpm 1.9 - 2.9 msec
IGN TIMING

Engine: After warming up

Air conditioner switch: OFF

Shift lever: P or N (A/T), Neutral
(M/T)

No loadIdle 13° - 17° BTDC
2,000 rpm 25° - 45° BTDC
CAL/LD VALUE

Engine: After warming up

Air conditioner switch: OFF

Shift lever: P or N (A/T), Neutral
(M/T)

No loadIdle 10% - 35%
2,500 rpm 10% - 35%
MASS AIRFLOW

Engine: After warming up

Air conditioner switch: OFF

Shift lever: P or N (A/T), Neutral
(M/T)

No loadIdle 1.0 - 4.0 g·m/s
2,500 rpm 4.0 - 10.0 g·m/s
PURG VOL C/V

Engine: After warming up

Air conditioner switch: OFF

Shift lever: P or N (A/T), Neutral
(M/T)

No loadIdle 0%
2,000 rpm 20 - 30%
INT/V TIM (B1)

Engine: After warming up

Air conditioner switch: OFF

Shift lever: P or N (A/T), Neutral
(M/T)

No loadIdle−5° - 5°CA
2,000 rpm Approx. 0° - 20°CA
INT/V SOL (B1)

Engine: After warming up

Air conditioner switch: OFF

Shift lever: P or N (A/T), Neutral
(M/T)

No loadIdle 0% - 2%
2,000 rpm Approx. 0% - 50%
VIAS S/V*
2
Engine: After warming upIdle OFF
More than 5,000 rpm ON MONITOR ITEM CONDITION SPECIFICATION

DTC P0031, P0032 HO2S1 HEATER
EC-139
[QR (WITH EURO-OBD)]
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DTC P0031, P0032 HO2S1 HEATERPFP:22690
DescriptionEBS010ML
SYSTEM DESCRIPTION
The ECM performs ON/OFF duty control of the heated oxygen sensor 1 heater corresponding to the engine
speed and engine coolant temperature. The duty percent varies with engine coolant temperature when engine
is started.
OPERATION
CONSULT-II Reference Value in Data Monitor ModeEBS010MM
Specification data are reference values.
On Board Diagnosis LogicEBS010MN
DTC Confirmation ProcedureEBS010MO
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.
Sensor Input Signal to ECM ECM function Actuator
Camshaft position sensor (PHASE)
Crankshaft position sensor (POS)Engine speed
Heated oxygen sensor 1
heater controlHeated oxygen sensor 1
heater
Engine coolant temperature sensor Engine coolant temperature
Engine speed rpm Heated oxygen sensor 1 heater
Above 3,600 OFF
Below 3,600 ON
MONITOR ITEM CONDITION SPECIFICATION
HO2S1 HTR (B1)

Engine: After warming up

Engine speed: Below 3,600 rpmON

Engine speed: Above 3,600 rpm OFF
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.)

Harness or connectors
(The heated oxygen sensor 1 heater circuit is
open or shorted.)

Heater 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.)

Harness or connectors
(The heated oxygen sensor 1 heater circuit is
shorted.)

Heater oxygen sensor 1 heater

EC-140
[QR (WITH EURO-OBD)]
DTC P0031, P0032 HO2S1 HEATER

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. If 1st trip DTC is detected, go to EC-142, "
Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
SEF174Y

DTC P0031, P0032 HO2S1 HEATER
EC-141
[QR (WITH EURO-OBD)]
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Wiring DiagramEBS010MP
TBWA0596E