2003 NISSAN X-TRAIL FL fuel system

TROUBLE DIAGNOSIS
EC-69
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EC
Symptom Matrix ChartEBS00BML
SYSTEM — BASIC ENGINE CONTROL SYSTEM
SYMPTOM
Reference
page
HARD/NO START/RESTART (EXCP. HA)
ENGINE STALL
HESITATION/SURGING/FLAT SPOT
SPARK KNOCK/DETONATION
LACK OF POWER/POOR ACCELERATION
HIGH IDLE/LOW IDLE
ROUGH IDLE/HUNTING
IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEATS/WATER TEMPERATURE HIGH
EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION
BATTERY DEAD (UNDER CHARGE)
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA
Fuel Fuel pump circuit 1 1 2 3 2 2 2 3 2EC-352
Fuel pressure regulator system 3 3 4 4 4 4 4 4 4 4EC-34
Injector circuit 1 1 2 3 2 2 2 2EC-343
Evaporativeemissionsystem 334444444 4EC-372
Air Positive crankcase ventilation sys-
tem334444444 41EC-375
Incorrect idle speed adjustment 3 3 1 1 1 1 1EC-64
Electric throttle control actuator 1 1 2 3 3 2 2 2 2 2 2EC-271
,
EC-273
,
EC-279
Ignition Incorrect ignition timing adjustment 3 3 1 1 1 1 1 1EC-64
Ignition circuit 1 1 2 2 2 2 2 2EC-334
Main power supply and ground circuit 2 2 3 3 3 3 3 2 3EC-108
Mass air flow sensor circuit 1 1 2 2 2 2 2 2EC-130,
EC-260
Engine coolant temperature sensor circuit 1 1 2 2 2 3 2 2 3 1 2EC-141
Throttle position sensor circuit 1 2 2 2 2 2 2 2EC-146
Accelerator pedal position sensor circuit 3 2 1 2 2EC-154
Heated oxygen sensor 1 circuit 1 2 3 2 2 2 2EC-160
,
EC-166
,
EC-174
,
EC-284
,
EC-290
Knock sensor circuit 2 2 3EC-212
Crankshaft position sensor (POS) circuit 2 2EC-217
Camshaft position sensor (PHASE) circuit 2 2EC-223
Vehicle speed signal circuit 2 3 3 3EC-239
Power steering pressure sensor circuit 2 3 3 3 3EC-244
ECM 22333333333EC-249,
EC-256
Intake valve timing control solenoid valve cir-
cuit332 13223 3EC-117,
EC-266

EC-70
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TROUBLE DIAGNOSIS
1 - 6: The numbers refer to the order of inspection.
(continued on next page)
SYSTEM — ENGINE MECHANICAL & OTHER
PNP switch circuit 3 3 3 3 3 3 3EC-325
Start signal circuit 2EC-348
Refrigerant pressure sensor circuit 2 3 3 3 3 4EC-359
Electrical load signal circuit 3 3 3 3EC-363
Airconditionercircuit 223333333 3 2AT C -3 0
SYMPTOM
Reference
page
HARD/NO START/RESTART (EXCP. HA)
ENGINE STALL
HESITATION/SURGING/FLAT SPOT
SPARK KNOCK/DETONATION
LACK OF POWER/POOR ACCELERATION
HIGH IDLE/LOW IDLE
ROUGH IDLE/HUNTING
IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEATS/WATER TEMPERATURE HIGH
EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION
BATTERY DEAD (UNDER CHARGE)
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA
SYMPTOM
Reference
page
HARD/NO START/RESTART (EXCP. HA)
ENGINE STALL
HESITATION/SURGING/FLAT SPOT
SPARK KNOCK/DETONATION
LACK OF POWER/POOR ACCELERATION
HIGH IDLE/LOW IDLE
ROUGH IDLE/HUNTING
IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEATS/WATER TEMPERATURE HIGH
EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION
BATTERY DEAD (UNDER CHARGE)
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA
Fuel Fuel tank
5
5FL-9
Fuel piping 5 5 5 5 5 5FL-3,EM-
29
Va p o r lo c k—
Valve deposit
555555 5—
Poor fuel (Heavy weight gaso-
line, Low octane)—

EC-72
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TROUBLE DIAGNOSIS
1 - 6: The numbers refer to the order of inspection.Cooling Radiator/Hose/Radiator filler cap
55555 55 25CO-12
Thermostat 5CO-21
Water pum pCO-19
Water galleryCO-7
Cooling fan 5CO-12
Coolant level (low)/Contaminated
coolantCO-9
NATS (Nissan Anti-theft System) 1 1EC-48or
BL-70
ESP/TCS/ABS control unit 2 2EC-310or
BRC-60
SYMPTOM
Reference
page
HARD/NO START/RESTART (EXCP. HA)
ENGINE STALL
HESITATION/SURGING/FLAT SPOT
SPARK KNOCK/DETONATION
LACK OF POWER/POOR ACCELERATION
HIGH IDLE/LOW IDLE
ROUGH IDLE/HUNTING
IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEATS/WATER TEMPERATURE HIGH
EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION
BATTERY DEAD (UNDER CHARGE)
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA

EC-86
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TROUBLE DIAGNOSIS
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
CONSULT-II FunctionEBS00BMQ
FUNCTION
*1 The following emission-related diagnostic information is cleared when the ECM memory is erased.
1. Diagnostic trouble codes
2. 1st trip diagnostic trouble codes
3. Freeze frame data
4. 1st trip freeze frame data
5. System readiness test (SRT) codes
6. Test values
7. Others11 5 B / YThrottle control motor
ground[Engine is running]
lIdle speedApproximately 0V
11 6 GThrottle control motor
(Close)[Ignition switch "ON"]
lGear position is "D" (A/T model)
lGear position is "1st" (M/T model)
lAccelerator pedal is releasing0 - 14V TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
PBIB0534E
Diagnostic test mode Function
Work supportThis mode enables a technician to adjust some devices faster and more accurately by following the
indications on the CONSULT-II unit.
Self-diagnostic resultsSelf-diagnostic results such as 1st trip DTC, DTCs and 1st trip freeze frame data or freeze frame data
can be read and erased quickly.*1
Data monitor Input/Output data in the ECM can be read.
Data monitor (SPEC)Input/Output of the specification for Basic fuel schedule, AFM, A/F feedback control value and the
other data monitor items can be read.
Active testDiagnostic Test Mode in which CONSULT-II drives some actuators apart from the ECMs and also
shifts some parameters in a specified range.
DTC & SRT confirmation The status of system monitoring tests and the self-diagnosis status/result can be confirmed.
Function test This mode is used to inform customers when their vehicle condition requires periodic maintenance.
ECM part number ECM part number can be read.

TROUBLE DIAGNOSIS
EC-87
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EC
ENGINE CONTROL COMPONENT PARTS/CONTROL SYSTEMS APPLICATION
X: Applicable
*1: This item includes 1st trip DTCs.
*2: This mode includes 1st trip freeze frame data or freeze frame data. The items appear on CONSULT-II screen in freeze frame data
mode only if a 1st trip DTC or DTC is detected. For details, refer toEC-39
. ItemDIAGNOSTIC TEST MODE
WORK
SUP-
PORTSELF-DIAGNOSTIC
RESULTS
DATA
MONI-
TORDATA
MONI-
TOR
(SPEC)ACTIVE
TESTDTC & SRT
CONFIRMATION
DTC*1FREEZE
FRAME
DATA*2SRT
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´´´´´
Wheel sensor´´´´
Accelerator pedal position sensor´´´
Throttle position sensor´´´
Intake air temperature sensor´´´
Knock sensor´
Refrigerant pressure sensor´´
Ignition switch (start signal)´´
Closed throttle position switch
(accelerator pedal position sensor
signal)´´
Air conditioner switch´´
Park/neutral position (PNP) switch´´´
St o p l a m p s w it c h´´´
Power steering pressure sensor´´´
Battery voltage´´
Load signal´´
ENGINE CONTROL COMPONENT PARTS
OUTPUT
Injectors´´ ´
Power transistor (Ignition timing)´´ ´
Throttle control motor relay´´´
EVAP canister purge volume con-
trol 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´´´´
Calculated load value´´´

TROUBLE DIAGNOSIS
EC-89
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EC
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 toEC-12, "INDEX FOR DTC".)
Freeze Frame Data and 1st Trip Freeze Frame Data
*1: The items are the same as those of 1st trip freeze frame data.WORK ITEM CONDITION USAGE
FUEL PRESSURE RELEASE
lFUEL 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
lTHEIDLEAIRVOLUMETHATKEEPSTHEENGINE
WITHIN THE SPECIFIED RANGE IS MEMORIZED IN
ECM.When learning the idle air volume
SELF-LEARNING CONT
lTHE COEFFICIENT OF SELF-LEARNING CONTROL
MIXTURE RATIO RETURNS TO THE ORIGINAL COEF-
FICIENT.When releasing fuel pressure
from fuel line
TARGET IDLE RPM ADJ*
lIDLE CONDITION When setting target idle speed
TARGET IGNITION TIMING ADJ*
lIDLE CONDITION When adjusting target ignition tim-
ing
After adjustment, confirm target
ignition timing with a timing light.
Freeze frame data
item*1Description
DIAG TROUBLE
CODE
[PXXXX]
lThe engine control component part/control system has a trouble code, it is displayed as “PXXXX”. (Refer
toEC-12, "
INDEX FOR DTC".)
FUEL SYS-B1
l“Fuel injection system status” at the moment a malfunction is detected is displayed.
lOne mode in the following is displayed.
“MODE 2”: Open loop due to detected system malfunction
“MODE 3”: Open loop due to driving conditions (power enrichment, deceleration enrichment)
“MODE 4”: Closed loop - using oxygen sensor(s) as feedback for fuel control
“MODE 5”: Open loop - has not yet satisfied condition to go to closed loop
CAL/LD VALUE [%]
lThe calculated load value at the moment a malfunction is detected is displayed.
COOLANT TEMP [°C]
or [°F]
lThe engine coolant temperature at the moment a malfunction is detected is displayed.
S-FUEL TRIM-B1 [%]
l“Short-term fuel trim” at the moment a malfunction is detected is displayed.
lThe short-term fuel trim indicates dynamic or instantaneous feedback compensation to the base fuel
schedule.
L-FUEL TRIM-B1 [%]
l“Long-term fuel trim” at the moment a malfunction is detected is displayed.
lThe long-term fuel trim indicates much more gradual feedback compensation to the base fuel schedule
than short-term fuel trim.
ENGINE SPEED
[rpm]
lThe engine speed at the moment a malfunction is detected is displayed.
VHCL SPEED [km/h]
or [mph]
lThe vehicle speed at the moment a malfunction is detected is displayed.
B/FUEL SCHDL
[msec]
lThe base fuel schedule at the moment a malfunction is detected is displayed.
INT/ATEMPSE[°C]
or [°F]
lThe intake air temperature at the moment a malfunction is detected is displayed.

TROUBLE DIAGNOSIS
EC-91
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EC
CLSD THL POS
[ON/OFF]´´lIndicates idle position [ON/OFF] com-
puted by ECM according to the acceler-
ator pedal position sensor signal.
AIR COND SIG
[ON/OFF]´´
lIndicates [ON/OFF] condition of the air
conditioner switch as determined by the
air conditioner signal.
P/N POSI SW
[ON/OFF]´´
lIndicates [ON/OFF] condition from the
park/neutral position (PNP) switch sig-
nal.
PW/ST SIGNAL
[ON/OFF]´´
l[ON/OFF] condition of the power steer-
ing system (determined by the signal
voltage of the power steering pressure
sensor signal) is indicated.
LOAD SIGNAL
[ON/OFF]´´
lIndicates [ON/OFF] condition from the
electrical load signal.
ON ... Rear window defogger switch is
ON and/or lighting switch is in 2nd posi-
tion.
OFF ... Both rear window defogger
switch and lighting switch are OFF.
IGNITION SW
[ON/OFF]´´
lIndicates [ON/OFF] condition from igni-
tion switch.
HEATER FAN SW
[ON/OFF]´
lIndicates [ON/OFF] condition from the
heater fan switch signal.
BRAKE SW
[ON/OFF]´
lIndicates [ON/OFF] condition from the
stop lamp switch signal.
INJ PULSE-B1
[msec]´
lIndicates the actual fuel injection pulse
width compensated by ECM according
to the input signals.lWhen the engine is stopped, a
certain computed value is indi-
cated.
B/FUEL SCHDL
[msec]´
l“Base fuel schedule” indicates the fuel
injection pulse width programmed into
ECM, prior to any learned on board cor-
rection.
IGN TIMING
[BTDC]´
lIndicates the ignition timing computed
by ECM according to the input signals.lWhen the engine is stopped, a
certain value is indicated.
A/F ALPHA-B1 [%]´
lThe mean value of the air-fuel ratio
feedback correction factor per cycle is
indicated.
lWhen the engine is stopped, a
certain value is indicated.
lThis data also includes the data
for the air-fuel ratio learning con-
trol.
CAL/LD VALUE [%]
l“Calculated load value” indicates the
value of the current airflow divided by
peak airflow.
MASS AIRFLOW
[g·m/s]
lIndicates the mass airflow computed by
ECM according to the signal voltage of
the mass air flow sensor. Monitored item
[Unit]ECM
INPUT
SIG-
NALSMAIN
SIG-
NALSCAN
DIAG
SUP-
PORT
MNTRDescription Remarks

EC-94
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TROUBLE DIAGNOSIS
ACTIVE TEST MODE
Test Item
DTC & SRT CONFIRMATION MODE
SRT STATUS Mode
For details, refer toEC-40, "SYSTEM READINESS TEST (SRT) CODE".
SRT Work Support Mode
This mode enables a technician to drive a vehicle to set the SRT while monitoring the SRT status.
TEST ITEM CONDITION JUDGEMENT CHECK ITEM (REMEDY)
FUEL INJEC-
TION
lEngine: Return to the original
trouble condition
lChange the amount of fuel injec-
tion using CONSULT-II.If trouble symptom disappears, see
CHECK ITEM.
lHarness and connectors
lFuel injectors
lHeated oxygen sensor 1
IGNITION TIM-
ING
lEngine: Return to the original
trouble condition
lTiming light: Set
lRetard the ignition timing using
CONSULT-II.If trouble symptom disappears, see
CHECK ITEM.
lPerform “Idle Air Volume Learn-
ing”.
POWER BAL-
ANCE
lEngine: After warming up, idle
the engine.
lA/C switch “OFF”
lShift lever “N”
lCut off each injector signal one at
a time using CONSULT-II.Engine runs rough or dies.
lHarness and connectors
lCompression
lFuel injectors
lPower transistor
lSpark plugs
lIgnition coils
COOLING FAN
lIgnition switch: ON
lTurn the cooling fan “ON” and
“OFF” with CONSULT-II.Cooling fan moves and stops.
lHarness and connectors
lCooling fan relay
lCooling fan motor
ENG COOLANT
TEMP
lEngine: Return to the original
trouble condition
lChange the engine coolant tem-
perature using CONSULT-II.If trouble symptom disappears, see
CHECK ITEM.
lHarness and connectors
lEngine coolant temperature sen-
sor
lFuel injectors
FUEL PUMP
RELAY
lIgnition switch: ON (Engine
stopped)
lTurn the fuel pump relay “ON”
and “OFF” using CONSULT-II
and listen to operating sound.Fuel pump relay makes the operat-
ing sound.lHarness and connectors
lFuel pump relay
PURG VOL
CONT/V
lEngine: After warming up, run
engine at 1,500 rpm.
lChange the EVAP canister purge
volume control solenoid valve
opening percent using CON-
SULT-II.Engine speed changes according to
the opening percent.lHarness and connectors
lSolenoid valve
V/T ASSIGN
ANGLE
lEngine: Return to the original
trouble condition
lChange intake valve timing using
CONSULT-II.If trouble symptom disappears, see
CHECK ITEM.
lHarness and connectors
lIntake valve timing control sole-
noid valve