2003 NISSAN X-TRAIL Service Repair Manual

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Page 929 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual TROUBLE DIAGNOSIS
EC-551
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CONSULT-II FunctionEBS010XD
FUNCTION
*: The following emission-related diagnostic information is cleared when the ECM memor

Page 930 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual EC-552
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TROUBLE DIAGNOSIS

ENGINE CONTROL COMPONENT PARTS/CONTROL SYSTEMS APPLICATION
X: Applicable
*1: This item includes 1st trip DTCs.
*2: This mode includes 1st trip freeze

Page 931 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual TROUBLE DIAGNOSIS
EC-553
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INSPECTION PROCEDURE
1. Turn ignition switch OFF.
2. Connect CONSULT-II and CONSULT-II CONVERTER to data
link connector, wh

Page 932 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual EC-554
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TROUBLE DIAGNOSIS

WORK SUPPORT MODE
Work Item
*: This function is not necessary in the usual service procedure.
SELF-DIAG RESULTS MODE
Self Diagnostic Item
Regarding i

EC-554
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TROUBLE DIAGNOSIS

WORK SUPPORT MODE
Work Item
*: This function is not necessary in the usual service procedure.
SELF-DIAG RESULTS MODE
Self Diagnostic Item
Regarding items of DTC and 1st trip DTC, refer to EC-482, "INDEX FOR DTC" .
Freeze Frame Data and 1st Trip Freeze Frame Data
*: The items are the same as those of 1st trip freeze frame data.WORK ITEM CONDITION USAGE
FUEL PRESSURE RELEASE
FUEL PUMP WILL STOP BY TOUCHING “START” DUR-
ING IDLING.
CRANK A FEW TIMES AFTER ENGINE STALLS.When releasing fuel pressure
from fuel line
IDLE AIR VOL LEARN
THE IDLE AIR VOLUME THAT KEEPS THE ENGINE
WITHIN THE SPECIFIED RANGE IS MEMORIZED IN
ECM.When learning the idle air volume
SELF-LEARNING CONT
THE COEFFICIENT OF SELF-LEARNING CONTROL
MIXTURE RATIO RETURNS TO THE ORIGINAL COEF-
FICIENT.When clearing the coefficient of
self-learning control value
TARGET IDLE RPM ADJ*
IDLE CONDITION When setting target idle speed
TARGET IGN TIM ADJ*
IDLE CONDITION When adjusting target ignition tim-
ing
Freeze frame data
item*Description
DIAG TROUBLE
CODE
[PXXXX]
The engine control component part/control system has a trouble code, it is displayed as PXXXX. (Refer to
EC-482, "
INDEX FOR DTC" .)
FUEL SYS-B1
“Fuel injection system status” at the moment a malfunction is detected is displayed.
One mode in the following is displayed.
“Mode2”: Open loop due to detected system malfunction
“Mode3”: Open loop due to driving conditions (power enrichment, deceleration enleanment)
“Mode4”: Closed loop - using oxygen sensor(s) as feedback for fuel control
“Mode5”: Open loop - has not yet satisfied condition to go to closed loop
COOLANT TEMP [°C]
or [°F]
The engine coolant temperature at the moment a malfunction is detected is displayed.
L-FUEL TRM-B1 [%]
“Long-term fuel trim” at the moment a malfunction is detected is displayed.
The long-term fuel trim indicates much more gradual feedback compensation to the base fuel schedule
than short-term fuel trim.
S-FUEL TRM-B1 [%]
“Short-term fuel trim” at the moment a malfunction is detected is displayed.
The short-term fuel trim indicates dynamic or instantaneous feedback compensation to the base fuel
schedule.
ENGINE SPEED
[rpm]
The engine speed at the moment a malfunction is detected is displayed.
VHCL SPEED [km/h]
or [mph]
The vehicle speed at the moment a malfunction is detected is displayed.
B/FUEL SCHDL
[msec]
The base fuel schedule at the moment a malfunction is detected is displayed.
INT/A TEMP SE [°C]
or [°F]
The intake air temperature at the moment a malfunction is detected is displayed.

Page 933 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual TROUBLE DIAGNOSIS
EC-555
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DATA MONITOR MODE
Monitored Item
×: Applicable
Monitored item
[Unit]ECM
INPUT
SIGNALSMAIN
SIG-
NALSDescription Remarks

TROUBLE DIAGNOSIS
EC-555
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DATA MONITOR MODE
Monitored Item
×: Applicable
Monitored item
[Unit]ECM
INPUT
SIGNALSMAIN
SIG-
NALSDescription Remarks
ENG SPEED [rpm]××
Indicates the engine speed computed from the
signals of the crankshaft position sensor (POS)
and camshaft position sensor (PHASE).
Accuracy becomes poor if engine
speed drops below the idle rpm.
If the signal is interrupted while the
engine is running, an abnormal
value may be indicated.
MAS A/F SE-B1 [V]××
The signal voltage of the mass air flow sensor
is displayed.When the engine is stopped, a
certain value is indicated.
B/FUEL SCHDL
[msec]×
“Base fuel schedule” indicates the fuel injection
pulse width programmed into ECM, prior to any
learned on board correction.
A/F ALPHA-B1 [%]×
The mean value of the air-fuel ratio feedback
correction factor per cycle is indicated.
When the engine is stopped, a
certain value is indicated.
This data also includes the data
for the air-fuel ratio learning con-
trol.
COOLAN TEMP/S
[°C] or [°F]××
The engine coolant temperature (determined by
the signal voltage of the engine coolant temper-
ature sensor) is displayed.
When the engine coolant tempera-
ture sensor is open or short-cir-
cuited, ECM enters fail-safe mode.
The engine coolant temperature
determined by the ECM is dis-
played.
HO2S1 (B1) [V]××
The signal voltage of the heated oxygen sensor
1 is displayed.
HO2S2 (B1) [V]×
The signal voltage of the heated oxygen sensor
2 is displayed.
HO2S1 MNTR (B1)
[RICH/LEAN]××
Display of heated oxygen sensor 1 signal dur-
ing air-fuel ratio feedback control:
RICH: means the mixture became “rich”, and
control is being affected toward a leaner mix-
ture.
LEAN: means the mixture became “lean”, and
control is being affected toward a rich mixture.After turning ON the ignition
switch, “RICH” is displayed until
air-fuel mixture ratio feedback
control begins.
When the air-fuel ratio feedback is
clamped, the value just before the
clamping is displayed continu-
ously.
HO2S2 MNTR (B1)
[RICH/LEAN]×
Display of heated oxygen sensor 2 signal:
RICH: means the amount of oxygen after three
way catalyst is relatively small.
LEAN: means the amount of oxygen after three
way catalyst is relatively large.
When the engine is stopped, a
certain value is indicated.
VHCL SPEED SE
[km/h] or [mph]××
The vehicle speed computed from the vehicle
speed signal is displayed.
BATTERY VOLT
[V]××
The power supply voltage of ECM is displayed.
ACCEL SEN 1 [V]××
The accelerator pedal position sensor signal
voltage is displayed.ACCEL SEN 2 signal is converted
by ECM internally. Thus, it differs
from ECM terminal voltage signal. ACCEL SEN 2 [V]×
THRTL SEN 1 [V]××
The throttle position sensor signal voltage is
displayed.THRTL SEN 2 signal is converted
by ECM internally. Thus, it differs
from ECM terminal voltage signal. THRTL SEN 2 [V]×
INT/A TEMP SE
[°C] or [°F]××
The intake air temperature (determined by the
signal voltage of the intake air temperature sen-
sor) is indicated.

Page 934 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual EC-556
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TROUBLE DIAGNOSIS

START SIGNAL
[ON/OFF]××Indicates start signal status [ON/OFF] com-
puted by the ECM according to the signals of
engine speed and battery voltag

EC-556
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TROUBLE DIAGNOSIS

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
ECM according to the accelerator pedal posi-
tion 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 pres-
sure sensor as determined by the power steer-
ing pressure sensor signal is indicated.
LOAD SIGNAL
[ON/OFF]××
Indicates [ON/OFF] condition from the electrical
load signal.
ON: Rear window defogger switch is ON and/or
lighting switch is in 2nd position.
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.
PURG VOL C/V
[%]
Indicates the EVAP canister purge volume con-
trol 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 con-
trol solenoid valve (determined by ECM accord-
ing to the input signal) is indicated.
The advance angle becomes larger as the
value increases
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 operat-
ing.
AIR COND RLY
[ON/OFF]×
The air conditioner relay control condition
(determined by ECM according to the input sig-
nals) is indicated. Monitored item
[Unit]ECM
INPUT
SIGNALSMAIN
SIG-
NALSDescription Remarks

Page 935 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual TROUBLE DIAGNOSIS
EC-557
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NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
DATA MO

TROUBLE DIAGNOSIS
EC-557
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NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
DATA MONITOR (SPEC) MODE
Monitored Item
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 control
condition determined by the ECM according to
the input signals.
COOLING FAN
[HI/LOW/OFF]
Indicates the condition of the cooling fan (deter-
mined 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 oxygen
sensor 1 heater determined by ECM according
to the input signals.
HO2S2 HTR (B1)
[ON/OFF]
Indicates [ON/OFF] condition of heated oxygen
sensor 2 heater determined by ECM according
to the input signals.
IDL A/V LEARN
[YET/CMPLT]
Display the condition of idle air volume learning
YET: Idle air volume learning has not been per-
formed yet.
CMPLT: Idle air volume learning has already
been performed successfully.
AC PRESS SEN
[V]
The signal voltage from the refrigerant pressure
sensor is displayed.
Voltage [V]
Voltage, frequency, duty cycle or pulse width
measured by the probe.
Only “#” is displayed if item is
unable to be measured.
Figures with “#”s are temporary
ones. They are the same figures
as an actual piece of data which
was just previously measured. Frequency
[msec], [Hz] or [%]
DUTY-HI
DUTY-LOW
PLS WIDTH-HI
PLS WIDTH-LOWMonitored item
[Unit]ECM
INPUT
SIGNALSMAIN
SIG-
NALSDescription Remarks
Monitored item [Unit]ECM
input
signalsMain
signalsDescription Remarks
ENG SPEED [rpm]×
Indicates the engine speed computed
from the signals of the crankshaft posi-
tion sensor (POS) and camshaft position
sensor (PHASE).
MAS A/F SE-B1 [V]××
The signal voltage of the mass air flow
sensor specification is displayed.When engine is running specification
range is indicated.
B/FUEL SCHDL
[msec]
“Base fuel schedule” indicates the fuel
injection pulse width programmed into
ECM, prior to any learned on board cor-
rection.
When engine is running specification
range is indicated.
A/F ALPHA-B1 [%]×
The mean value of the air-fuel ratio feed-
back correction factor per cycle is indi-
cated.When engine is running specification
range is indicated.
This data also includes the data for the
air-fuel ratio learning control.

Page 936 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual EC-558
[QR (WITHOUT EURO-OBD)]
TROUBLE DIAGNOSIS

NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
ACTIVE TEST MODE
Test Item
*:Leav

EC-558
[QR (WITHOUT EURO-OBD)]
TROUBLE DIAGNOSIS

NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
ACTIVE TEST MODE
Test Item
*:Leaving cooling fan OFF with CONSULT-II while engine is running may cause the engine to overheat.TEST ITEM CONDITION JUDGEMENT CHECK ITEM (REMEDY)
FUEL INJEC-
TION
Engine: Return to the original
trouble condition
Change the amount of fuel injec-
tion using CONSULT-II.If trouble symptom disappears, see
CHECK ITEM.
Harness and connectors
Fuel injector
Heated oxygen sensor 1
IGNITION TIM-
ING
Engine: Return to the original
trouble condition
Timing light: Set
Retard the ignition timing using
CONSULT-II.If trouble symptom disappears, see
CHECK ITEM.
Perform Idle Air Volume Learning.
POWER BAL-
ANCE
Engine: After warming up, idle
the engine.
Air conditioner switch OFF
Shift lever: N (A/T), Neutral (M/T)
Cut off each injector signal one at
a time using CONSULT-II.Engine runs rough or dies.
Harness and connectors
Compression
Fuel injector
Power transistor
Spark plug
Ignition coil
COOLING FAN*
Ignition switch: ON
Turn the cooling fan LOW, HI,
OFF with CONSULT-II.Cooling fan moves and stops.
Harness and connectors
Cooling fan relay
Cooling fan motor
ENG COOLANT
TEMP
Engine: Return to the original
trouble condition
Change the engine coolant tem-
perature using CONSULT-II.If trouble symptom disappears, see
CHECK ITEM.
Harness and connectors
Engine coolant temperature sen-
sor
Fuel injector
FUEL PUMP
RELAY
Ignition switch: ON (Engine
stopped)
Turn the fuel pump relay ON and
OFF using CONSULT-II and lis-
ten to operating sound.Fuel pump relay makes the operat-
ing sound.Harness and connectors
Fuel pump relay
PURG VOL
CONT/V
Engine: After warming up, run
engine at 1,500 rpm.
Change the EVAP canister purge
volume control solenoid valve
opening percent using CON-
SULT-II.Engine speed changes according to
the opening percent.Harness and connectors
Solenoid valve
V/T ASSIGN
ANGLE
Engine: Return to the original
trouble condition
Change intake valve timing using
CONSULT-II.If trouble symptom disappears, see
CHECK ITEM.
Harness and connectors
Intake valve timing control sole-
noid valve

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