2001 NISSAN X-TRAIL coolant

EC-1174
[QR20(WITHOUT EURO-OBD)]
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 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 to EC-1142
.
CONSULT-II INSPECTION PROCEDURE
1. Turn ignition switch OFF.
ItemDIAGNOSTIC TEST MODE
WORK
SUPPORTSELF-DIAGNOSTIC
RESULTS
DATA
MONI-
TORDATA
MONI-
TOR
(SPEC)ACTIVE
TEST
DTC*1FREEZE
FRAME
DATA*2
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 (Vehicle speed signal)××××
Accelerator pedal position sensor×××
Throttle position sensor×××
Intake air temperature sensor××
Knock sensor×
Refrigerant pressure sensor××
Ignition switch (start signal)××
Closed throttle position switch (accelera-
tor pedal position sensor signal)××
Air conditioner switch××
Park/neutral position (PNP) switch××
Stop lamp switch×××
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 control sole-
noid 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×××

EC-1176
[QR20(WITHOUT EURO-OBD)]
TROUBLE DIAGNOSIS
*: 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 E C - 111 9 , "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. SELF-LEARNING CONT
●THE COEFFICIENT OF SELF-LEARNING CONTROL
MIXTURE RATIO RETURNS TO THE ORIGINAL COEF-
FICIENT.When releasing fuel pressure
from fuel line
TARGET IDLE RPM ADJ*
●IDLE CONDITION When setting target idle speed
TARGET IGNITION TIMING ADJ*
●IDLE CONDITION When adjusting target ignition tim-
ing WORK ITEM CONDITION USAGE
Freeze frame data
item*1Description
DIAG TROUBLE
CODE
[PXXXX]
●The engine control component part/control system has a trouble code, it is displayed as “PXXXX”. (Refer
to E C - 111 9 , "
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.
“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 [%]
●The calculated load value at the moment a malfunction is detected is displayed.
COOLANT TEMP [°C]
or [°F]
●The engine coolant temperature at the moment a malfunction is detected is displayed.
S-FUEL TRIM-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.
L-FUEL TRIM-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.
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.

TROUBLE DIAGNOSIS
EC-1177
[QR20(WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
DATA MONITOR MODE
Monitored Item
×: Applicable
Monitored item
[Unit]ECM
INPUT
SIG-
NALSMAIN
SIG-
NALSCAN
DIAG
SUP-
PORT
MNTRDescription Remarks
ENG SPEED [rpm]××
●Indicates the engine speed computed
from the signals of the crankshaft posi-
tion sensor (POS) and camshaft posi-
tion 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.
COOLAN TEMP/S
[°C] or [°F]××
●The engine coolant temperature (deter-
mined by the signal voltage of the
engine coolant temperature 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 heated oxygen
sensor 1 is displayed.
HO2S2 (B1) [V]××
●The signal voltage of heated oxygen
sensor 2 is displayed.
HO2S1 MNTR (B1)
[RICH/LEAN]××
●Display of heated oxygen sensor 1 sig-
nal during air-fuel ratio feedback control:
RICH ... means the mixture became
“rich”, and control is being affected
toward a leaner mixture.
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 sig-
nal:
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 dis-
played.
ACCEL SEN 1 [V]××
●The accelerator pedal position sensor
signal voltage is displayed.
ACCEL SEN 2 [V]×
THRTL SEN 1 [V]××
●The throttle position sensor signal volt-
age is displayed.
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 sensor) is indicated.
START SIGNAL
[ON/OFF]××
●Indicates [ON/OFF] condition from the
starter signal.●After starting the engine, [OFF] is
displayed regardless of the starter
signal.

TROUBLE DIAGNOSIS
EC-1181
[QR20(WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
REAL TIME DIAGNOSIS IN DATA MONITOR MODE (RECORDING VEHICLE DATA)
Description
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/1st trip DTC and malfunction item 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 at right, and the data after the malfunction detec-
tion 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/1st trip DTC and malfunction item 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.
Operation
1. “AUTO TRIG”
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-II.Engine runs rough or dies.
●Harness and connectors
●Compression
●Fuel injectors
●Power transistor
●Spark plugs
●Ignition coils
COOLING FAN
●Ignition switch: ON
●Turn the cooling fan “ON” and
“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 injectors
FUEL PUMP
RELAY
●Ignition switch: ON (Engine
stopped)
●Turn the fuel pump relay “ON”
and “OFF” using CONSULT-II
and listen 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 TEST ITEM CONDITION JUDGEMENT CHECK ITEM (REMEDY)
SEF706XSEF707X

EC-1184
[QR20(WITHOUT EURO-OBD)]
TROUBLE DIAGNOSIS
INJ PULSE-B1
●Engine: After warming up
●Shift lever: N
●Air conditioner switch: OFF
●No-loadIdle 2.0 - 3.0 msec
2,000 rpm 1.9 - 2.9 msec
IGN TIMING
●Engine: After warming up
●Shift lever: N
●Air conditioner switch: OFF
●No-loadIdleMT: 12° - 16° BTDC
AT: 14° - 18° BTDC
2,000 rpm 25° - 45° BTDC
CAL/LD VALUE
●Engine: After warming up
●Shift lever: N
●Air conditioner switch: OFF
●No-loadIdle 10% - 35%
2,500 rpm 10% - 35%
MASS AIRFLOW
●Engine: After warming up
●Shift lever: N
●Air conditioner switch: OFF
●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
●Shift lever: N
●Air conditioner switch: OFF
●No-loadIdle 0%
2,000 rpm 20 - 30%
INT/V TIM (B1)
●Engine: After warming up
●Shift lever: N
●Air conditioner switch: OFF
●No-loadIdle−5° - 5°CA
When revving engine up to 2,000 rpm
quicklyApprox. 0° - 20°CA
INT/V SOL (B1)
●Engine: After warming up
●Shift lever: N
●Air conditioner switch: OFF
●No-loadIdle 0% - 2%
When revving engine up to 2,000 rpm
quicklyApprox. 0% - 50%
AIR COND RLY
●Engine: After warming up, idle
the engineAir conditioner switch: OFF OFF
Air conditioner switch: ON
(Compressor operates)ON
FUEL PUMP RLY
●For 1 seconds after turning ignition switch ON
●Engine running or crankingON
●Except above conditions OFF
THRTL RELAY
●Ignition switch: ON ON
COOLING FAN
●Engine: After warming up, idle
the engine
●Air conditioner switch: OFFEngine coolant temperature is 94°C
(201°F) or lessOFF
Engine coolant temperature is
between 95°C (203°F) and 104°C
(219°F)LOW
Engine coolant temperature is 105°C
(221°F) or moreHIGH
HO2S1 HTR (B1)
●Engine: After warming up
●Engine speed: Below 3,600 rpmON
●Engine speed: Above 3,600 rpm OFF
HO2S2 HTR (B1)
●Engine speed: Below 3,800 rpm [After driving for 2 minutes at a speed of
70 km/h (43 MPH) or more]ON
●Engine speed: Above 3,800 rpm OFF MONITOR ITEM CONDITION SPECIFICATION

EC-1188
[QR20(WITHOUT EURO-OBD)]
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
PFP:00031
DescriptionEBS00N48
The specification (SP) value indicates the tolerance of the value that is displayed in “DATA MONITOR (SPEC)”
mode of CONSULT-II during normal operation of the Engine Control System. When the value in “DATA MONI-
TOR (SPEC)” mode is within the SP value, the Engine Control System is confirmed OK. When the value in
“DATA MONITOR (SPEC)” mode is NOT within the SP value, the Engine Control System may have one or
more malfunctions.
The SP value is used to detect malfunctions that may affect the Engine Control System, but will not light the
MI.
The SP value will be displayed for the following three items:
●B/FUEL SCHDL (The fuel injection pulse width programmed into ECM prior to any learned on board cor-
rection)
●A/F ALPHA-B1 (The mean value of air-fuel ratio feedback correction factor per cycle)
●MAS A/F SE-B1 (The signal voltage of the mass air flow sensor)
Testing ConditionEBS00N49
●Vehicle driven distance: More than 5,000 km (3,017 miles)
●Barometric pressure: 98.3 - 104.3 kPa (0.983 - 1.043 bar, 1.003 - 1.064 kg/cm2 , 14.25 - 15.12 psi)
●Atmospheric temperature: 20 - 30°C (68 - 86°F)
●Engine coolant temperature: 75 - 95°C (167 - 203°F)
●Transmission: Warmed-up*1
●Electrical load: Not applied*2
●Engine speed: Idle
*1: For A/T models, after the engine is warmed up to normal operating temperature, drive vehicle until “FLUID
TEMP SE” (A/T fluid temperature sensor signal) indicates more than 60°C (140°F).
For M/T models, after the engine is warmed up to normal operating temperature, drive vehicle for 5 minutes.
*2: Rear window defogger switch, air conditioner switch, lighting switch are “OFF”. Steering wheel is straight
ahead.
Inspection ProcedureEBS00N4A
NOTE:
Perform “DATA MONITOR (SPEC)” mode in maximum scale display.
1. Perform EC-1152, "
Basic Inspection" .
2. Confirm that the testing conditions indicated above are met.
3. Select “B/FUEL SCHDL”, “A/F ALPHA-B1” and “MAS A/F SE-
B1” in “DATA MONITOR (SPEC)” mode with CONSULT-II.
4. Make sure that monitor items are within the SP value.
5. If NG, go to EC-1189, "
Diagnostic Procedure" .
SEF601Z

DTC P0117, P0118 ECT SENSOR
EC-1209
[QR20(WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
DTC P0117, P0118 ECT SENSORPFP:22630
Component DescriptionEBS00N4W
The engine coolant temperature sensor is used to detect the engine
coolant temperature. The sensor modifies a voltage signal from the
ECM. The modified signal returns to the ECM as the engine coolant
temperature input. The sensor uses a thermistor which is sensitive to
the change in temperature. The electrical resistance of the ther-
mistor decreases as temperature increases.

*: These data are reference values and are measured between ECM terminal 93
(Engine coolant temperature sensor) 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 LogicEBS00N4X
These self-diagnoses have the one trip detection logic.
FAIL-SAFE MODE
When this malfunction is detected, the ECM enters fail-safe mode and the MI lights up.
SEF594K
Engine coolant
temperature°C (°F)Voltage* V Resistance kΩ
−10 (14) 4.4 7.0 - 11.4
20 (68) 3.5 2.1 - 2.9
50 (122) 2.2 0.68 - 1.00
90 (194) 0.9 0.236 - 0.260
SEF012P
DTC No.Trouble Diagnosis
NameDTC Detecting Condition Possible Cause
P0117
0117Engine coolant
temperature sen-
sor circuit low inputAn excessively low voltage from the sensor is
sent to ECM.
●Harness or connectors
(The sensor circuit is open or shorted.)
●Engine coolant temperature sensor
P0118
0118Engine coolant
temperature sen-
sor circuit high
inputAn excessively high voltage from the sensor is
sent to ECM.

EC-1210
[QR20(WITHOUT EURO-OBD)]
DTC P0117, P0118 ECT SENSOR
DTC Confirmation Procedure
EBS00N4Y
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.
WITH CONSULT-II
1. Turn ignition switch “ON”.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Wait at least 5 seconds.
4. If DTC is detected, go to EC-1212, "
Diagnostic Procedure" .
WITHOUT CONSULT-II
1. Turn ignition switch “ON” and wait at least 5 seconds.
2. Turn ignition switch “OFF”, wait at least 10 seconds and then turn “ON”.
3. Perform “Diagnostic Test Mode II (Self-diagnostic results)” with ECM.
4. If DTC is detected, go to EC-1212, "
Diagnostic Procedure" .
Detected items Engine operating condition in fail-safe mode
Engine coolant temper-
ature sensor circuitEngine coolant temperature will be determined by ECM based on the time after turning ignition switch “ON”
or “START”.
CONSULT-II displays the engine coolant temperature decided by ECM.
ConditionEngine coolant temperature decided
(CONSULT-II display)
Just as ignition switch is turned ON or Start 40°C (104°F)
More than approx. 4 minutes after ignition ON or
Start80°C (176°F)
Except as shown above40 - 80°C (104 - 176°F)
(Depends on the time)
When the fail-safe system for engine coolant temperature sensor is activated, the cooling fan operates
while engine is running.
SEF058Y