2001 NISSAN X-TRAIL cooling

TROUBLE DIAGNOSIS
EC-1417
[YD]
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ENGINE CONTROL
Camshaft position sensor circuit 3 3EC-1484
Start signal circuit 1 1 1 1 1 1 1 1 1EC-1566
Ignition switch circuit 1 1 1 1EC-1442
Power supply for ECM circuit 1 1 1 1EC-1442
Cooling fan relay circuitEC-1508
EGR volume control valve circuit 1 1 1EC-1551
Glow relay circuit 1 1 1 1EC-1544
ECM relay (Self-shutoff) circuit 1 1 1 1EC-1538
ECM, connector circuit 2 2 2 2 2 2 2 2 2 2 2 2 2EC-1494,
EC-1536
Air conditioner relay circuit 1 1EC-1572
Air conditioner switch circuitEC-1572
NATS (Nissan Anti-theft System) 1EC-1406
SYSTEM — Basic engine control systemSYMPTOM
Reference page
HARD/NO START/RESTART (EXCP. HA) ENGINE STALL HESITATION/SURGING/FLAT SPOT KNOCK/DETONATION
LACK OF POWER POOR ACCELERATION HI IDLE LOW IDLE
NO START (with first firing) NO START (without first firing) HARD TO START WHEN ENGINE IS COLD HARD TO START WHEN ENGINE IS HOT
AT I D L E DURING DRIVING WHEN DECELERATING
Warranty symptom code AA AB AC AD AE AF

TROUBLE DIAGNOSIS
EC-1419
[YD]
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1 - 5: The numbers refer to the order of inspection.
(continued on next page)
ENGINE CONTROL
Camshaft position sensor circuitEC-1484
Start signal circuitEC-1566
Ignition switch circuitEC-1442
Power supply for ECM circuit11EC-1442
Cooling fan relay circuit 2EC-1508
EGR volume control valve circuit 1EC-1551
Glow relay circuit1EC-1544
ECM relay (Self-shutoff) circuit1EC-1538
ECM, connector circuit 2 2 2 2 2 2 2 2 2 2 2EC-1494,EC-
1536
Air conditioner relay circuitEC-1572
Air conditioner switch circuitEC-1572
NATS (Nissan Anti-theft System)1EC-1406
SYSTEM — Basic engine control systemSYMPTOM
Reference page
ROUGH IDLE/HUNTING IDLING VIBRATION
SLOW/NO RETURN TO IDLE OVERHEAT/HIGH ENGINE COOLANT TEMPERATURE EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION ABNORMAL SMOKE COLOR DEAD BATTERY (UNDER CHARGE) Malfunction indicator illuminates. Can be detected by CONSULT-II?
BLACK SMOKE WHITE SMOKE
Warranty symptom code AG AH AJ AK AL AM AP HA

EC-1430
[YD]
TROUBLE DIAGNOSIS
D25 R/G Stop lamp switch[Ignition switch “ON”]●Brake pedal fully releasedApproximately 0V
[Ignition switch “ON”]
●Brake pedal depressedBATTERY VOLTAGE
(11 - 14V)
D27 B/Y Start signal[Ignition switch “ON”]Approximately 0V
[Ignition switch “START”]BATTERY VOLTAGE
(11 - 14V)
E1 LSuction control valve
power supply[Engine is running]
●Warm-up condition
●Idle speed0 - 12.5V
[Engine is running]
●Warm-up condition
●Engine speed is 2,000 rpm0 - 12.5V
E2 LG Cooling fan relay (Low)[Engine is running]
●Cooling fan is not operatingBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
●Cooling fan is operatingApproximately 0.1V
E7 LG/B Cooling fan relay (High)[Engine is running]
●Cooling fan is not operating
●Cooling fan is operating at low speedBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
●Cooling fan is operating at high speedApproximately 0.1V
E8 Y/G Suction control valve 1[Engine is running]
●Warm-up condition
●Idle speed0 - 12.5V
[Engine is running]
●Warm-up condition
●Engine speed is 2,000 rpm0 - 12.5V
E9 W/R Glow relay Refer to EC-1544, "
GLOW CONTROL SYSTEM" .
E10 R CAN communication line[Ignition switch “ON”]Approximately 1.7 - 2.3V
Output voltage varies with the
communication status. TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)
PBIB0399E
PBIB0400E
PBIB0401E
PBIB0402E

TROUBLE DIAGNOSIS
EC-1433
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ENGINE CONTROL COMPONENT PARTS/CONTROL SYSTEMS APPLICATION
X: Applicable
SELF-DIAGNOSTIC MODE
Regarding items detected in “SELF-DIAG RESULTS” mode, refer to — EC-1393, "INDEX FOR DTC" .
DATA MONITOR MODE
ItemDIAGNOSTIC TEST MODE
SELF-DIAG
RESULTSDATA MONI-
TORACTIVE
TEST
ENGINE CONTROL COMPONENT PARTS
INPUTCrankshaft position sensor (TDC)××
Camshaft position sensor×
Engine coolant temperature sensor××
Vehicle speed sensor××
Fuel temperature sensor××
Accelerator pedal position sensor 1××
Accelerator pedal position sensor 2××
Accelerator pedal released position switch××
Common rail fuel pressure sensor××
Park/neutral position (PNP) switch×
Mass air flow sensor××
Battery voltage××
Power steering oil pressure switch×
Stop lamp switch×
Absolute pressure sensor××
Fuel injector adjustment resistor×
OUTPUTSuction control valve×××
Fuel injector×××
Glow relay××
Cooling fan relay×××
EGR volume control valve××
MONITOR ITEMECM
INPUT
SIG-
NALMAIN
SIG-
NALSCAN
DIAG
SUP-
PORT
MNTRCONDITION SPECIFICATION
CKPS·RPM (TDC) [rpm]××
●The engine speed computed
from the crankshaft position
sensor (TDC) signal is dis-
played.
COOLAN TEMP/S
[°C] or [°F]××
●The engine coolant tempera-
ture (determined by the signal
voltage of the engine coolant
temperature sensor) is dis-
played.When the engine coolant temper-
ature circuit is open or short, ECM
enters fail-safe mode. The engine
coolant temperature determined
by the ECM is displayed.
VHCL SPEED SE
[km/h] or [mph]××
●The vehicle speed computed
form the vehicle speed sensor
signal is displayed.
FUEL TEMP SEN [°C] or [°F]××
●The fuel temperature (deter-
mined by the signal voltage of
the fuel temperature sensor) is
displayed.

EC-1434
[YD]
TROUBLE DIAGNOSIS
ACCEL POS SEN [V]××
●The accelerator pedal position
sensor 1 signal voltage is dis-
played.
ACCEL SEN 2 [V]××
●The accelerator pedal position
sensor 2 signal voltage is dis-
played.
OFF ACCEL SW [ON/OFF]××
●indicates [ON/OFF] condition
from the accelerator pedal
released position switch signal.
ACT CR PRESS [MPa]××
●The common rail fuel pressure
(determined by the signal volt-
age of the common rail fuel
pressure sensor) is displayed.
BATTERY VOLT [V]××
●The power supply voltage of
ECM is displayed.
P/N POSI SW [ON/OFF]××
●Indicates [ON/OFF] condition
from the park/neutral position
switch signal.
START SIGNAL [ON/OFF]××
●indicates [ON/OFF] condition
from the starter signal.
PW/ST SIGNAL [ON/OFF]×
●indicates [ON/OFF] condition
from the power steering oil pres-
sure switch signal.
BRAKE SW [ON/OFF]××
●indicates [ON/OFF] condition
from the stop lamp switch sig-
nal.
IGN SW [ON/OFF]××
●Indicates [ON/OFF] condition
from ignition switch signal.
MAS AIR/FL SE [V]××
●The signal voltage of the mass
air flow sensor is displayed.
SUCTION CV [°CA]×
●Indicates [°CA] of suction con-
trol valve operating angle.
MAIN INJ WID [msec]×
●Indicates the actual fuel injec-
tion pulse width compensated
by ECM according to the input
signals.
GLOW RLY [ON/OFF]×
●The glow relay control condition
(determined by ECM according
to the input signal) is displayed.
COOLING FAN
[LOW/HI/OFF]×
●Indicates the control condition of
the cooling fans (determined by
ECM according to the input sig-
nal).
LOW ... Operates at low speed.
HI ... Operates at high speed.
OFF ... Stopped
EGR VOL CON/V [step]×
●Indicates the EGR volume con-
tro l value co mp ute d by the ECM
according to the input signals.
●The opening becomes larger as
the value increases. MONITOR ITEMECM
INPUT
SIG-
NALMAIN
SIG-
NALSCAN
DIAG
SUP-
PORT
MNTRCONDITION SPECIFICATION

EC-1436
[YD]
TROUBLE DIAGNOSIS
ACTIVE TEST MODE
REAL TIME DIAGNOSIS IN DATA MONITOR MODE
CONSULT-II has two kinds of triggers and they can be selected by touching “SETTING” in “DATA MONITOR”
mode.
1. “AUTO TRIG” (Automatic trigger):
–The malfunction will be identified on the CONSULT-II screen in
real time.
In other words, DTC will be displayed if the malfunction is
detected by ECM.
At the moment a malfunction is detected by ECM, “MONITOR”
in “DATA MONITOR” screen is changed to “Recording Data ...
xx%” as shown in the figure, and the data after the malfunction
detection is recorded. Then when the percentage reached
100%, “REAL-TIME DIAG” screen is displayed. If “STOP” is
touched on the screen during “ Recording Data ... xx%”, “REAL-
TIME DIAG” screen is also displayed.
The recording time after the malfunction detection and the recording speed can be changed by “TRIG-
GER POINT” and “Recording Speed”. Refer to CONSULT-II OPERATION MANUAL.
2. “MANU TRIG” (Manual trigger):
–DTC will not be displayed automatically on CONSULT-II screen
even though a malfunction is detected by ECM.
DATA MONITOR can be performed continuously even though a
malfunction is detected.
Use these triggers as follows:
1. “AUTO TRIG”
–While trying to detect the DTC by performing the “DTC Confir-
mation Procedure”, be sure to select to “DATA MONITOR
(AUTO TRIG)” mode. You can confirm the malfunction at the
moment it is detected.
TEST ITEM CONDITION JUDGEMENT CHECK ITEM (REMEDY)
POWER BAL-
ANCE
●Engine: After warming up, idle the
engine.
●A/C switch “OFF”
●Shift lever “N”
●Cut off each injector signal one at
a time using CONSULT-IIEngine runs rough or dies.
●Harness and connectors
●Compression
●Fuel injectors
COOLING FAN
●Ignition switch: ON
●Operate the cooling fan at “LOW”,
“HI” speed and turn “OFF” using
CONSULT-II.Cooling fan moves at “LOW”, “HI”
speed and stops.●Harness and connector
●Cooling fan motor
●Cooling fan relay
OFF ACCEL PO
SIG
●This mode is used for ECM to learn accelerator pedal released positions.
GLOW RELAY
●Ignition switch: ON (Engine
stopped)
●Turn the glow relay “ON” and
“OFF” using CONSULT-II and lis-
ten to operating sound.Glow relay makes the operating
sound.●Harness and connector
●Glow relay
EGR VOL CONT/
V
●Ignition switch: ON
●Change EGR volume control
valve opening step using CON-
SULT-II.EGR volume control valve makes
an operating sound.●Harness and connector
●EGR volume control valve
PRES REGULA-
TOR
●Ignition switch: ON
●Change fuel pressure in common
rail using CONSULT-IIFuel leaks.●Fuel line
●Fuel pressure relief valve
PBIB0480E
SEF707X

EC-1438
[YD]
TROUBLE DIAGNOSIS
ACCEL SEN 2*●Ignition switch: ON
(Engine stopped)Accelerator pedal: fully released 0.3 - 1.8V
Accelerator pedal: fully depressed More than 3.0V
OFF ACCEL SW
●Ignition switch: ON
(Engine stopped)Accelerator pedal: fully released ON
Accelerator pedal: slightly
depressed OFF
MAS AIR/FL SE
●Engine: After warming up
●Air conditioner switch: OFF
●Shift lever: Neutral position
●No-loadIdle 1.0 - 2.5V
2,000 rpm 2.1 - 2.7V
BATTERY VOLT
●Ignition switch: ON (Engine stopped) 11 - 14V
P/N POSI SW
●Ignition switch: ONShift lever: Neutral position ON
Except above OFF
START SIGNAL
●Ignition switch: ON → START → ON OFF → ON → OFF
PW/ST SIGNAL
●Engine: After warming up, idle
the engineSteering wheel is in neutral posi-
tion. (Forward direction)OFF
Steering wheel is turned. ON
BRAKE SW
●Ignition switch: ONBrake pedal: Fully released OFF
Brake pedal: Slightly depressed ON
IGN SW
●Ignition switch: ON → OFF ON → OFF
ACT CR PRESS
●Engine: After warming up
●Air conditioner switch: OFF
●Shift lever: Neutral position
●No-loadIdle 30 - 40 MPa
2,000 rpm 40 - 50 MPa
SUCTION CV
●Engine: After warming up
●Air conditioner switch: OFF
●Shift lever: Neutral position
●No-loadIdle 70.0 - 71.5°CA
2,000 rpm 73.5 - 75.0°CA
MAIN INJ WID
●Engine: After warming up
●Shift lever: Neutral position
●Idle speedNo-load 0.68 - 0.78 msec
Air conditioner switch: ON
Rear window defogger switch: ON0.78 - 0.88 msec
GLOW RLY Refer to EC-1544, "
GLOW CONTROL SYSTEM" .
COOLING FAN
●When cooling fan is stopped. OFF
●When cooling fans operate at low speed. LOW
●When cooling fans operate at high speed. HIGH
EGR VOL CON/V
●Engine: After warming up
●Air conditioner switch: OFF
●Shift lever: Neutral position
●No-loadAfter one minute at idle More than 10 steps
Revving engine from idle to 3,600
rpm0 step
INT/A VOLUME
●Engine: After warming up, idle the engine 150 - 450 mg/st MONITOR ITEM CONDITION SPECIFICATION

EC-1508
[YD]
DTC P1217 OVERHEAT (COOLING SYSTEM)
DTC P1217 OVERHEAT (COOLING SYSTEM)
PFP:00021
DescriptionEBS004QR
SYSTEM DESCRIPTION
The ECM controls the cooling fan corresponding to the vehicle speed, engine coolant temperature, air condi-
tioner ON signal. The control system has 3-step control [HIGH/LOW/OFF].
OPERATION
CONSULT-II Reference Value in Data Monitor ModeEBS004QS
Specification data are reference values.
ECM Terminals and Reference ValueEBS004QT
Specification data are reference values and are measured between each terminal and 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 LogicEBS004QU
This diagnosis continuously monitors the engine coolant temperature.
If the cooling fan or another component in the cooling system malfunctions, engine coolant temperature will
rise.
Sensor Input signal to ECM ECM function Actuator
Vehicle speed sensor Vehicle speed
Cooling fan
controlCooling fan relay Engine coolant temperature sensor Engine coolant temperature
Air conditioner switch Air conditioner “ON” signal
SEF421Z
MONITOR ITEM CONDITION SPECIFICATION
COOLING FANWhen cooling fan is stopped. OFF
When cooling fans operate at low speed. LOW
When cooling fans operate at high speed. HIGH
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
E2 LG Cooling fan relay (Low)[Engine is running]
●Cooling fan is not operatingBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
●Cooling fan is operatingApproximately 0.1V
E7 LG/B Cooling fan relay (High)[Engine is running]
●Cooling fan is not operating
●Cooling fan is operating at low speedBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
●Cooling fan is operating at high speedApproximately 0.1V