sensor NISSAN X-TRAIL 2003 Electronic Repair Manual

TROUBLE DIAGNOSIS
EC-679
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EC
1 - 5: The numbers refer to the order of inspection.
(continued on next page)
ENGINE CONTROL
Camshaft position sensor circuitEC-739
Start signal circuitEC-818
Ignition switch circuitEC-700
Power supply for ECM circuit11EC-700
Cooling fan relay circuit 2EC-761
EGR volume control valve circuit 1EC-803
Glow relay circuit1EC-796
ECM relay (Self-shutoff) circuit1EC-790
ECM,connectorcircuit 22222222222EC-749,EC-
788
Air conditioner relay circuitEC-824
Air conditioner switch circuitEC-824
NATS (Nissan Anti-theft System)1EC-666
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-686
[YD]
TROUBLE DIAGNOSIS
TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)
A1
A2
A3
A4L/W
Y/PU
PU
YEDU drive No. 2
EDU drive No. 4
EDU drive No. 3
EDU drive No. 1[Engine is running]
lWarm-up condition
lIdle speed0-4V
[Engine is running]
lWarm-up condition
lEngine speed is 2,000 rpm0-4V
A5
A6
A7B
B
BECM ground[Engine is running]
lIdle speedApproximately 0V
A8
A9R
RPower supply for ECM[Ignition switch "ON"]BATTERY VOLTAGE
(11 - 14V)
A10 R Mass air flow sensor[Engine is running]
lWarm-up condition
lIdle speed0.5 - 2.5V
[Engine is running]
lWarm-up condition
lEngine speed is 2,000 rpm1.5 - 3.5V
A11 L/OREngine coolant tempera-
ture sensor[Engine is running]
lWarm-up conditionApproximately 0 - 4.8V
Output voltage varies with engine
coolant temperature
A12 PU Fuel temperature sensor[Engine is running]
lWarm-up conditionApproximately 0 - 4.8V
Output voltage varies with fuel
temperature
A21 BAccelerator pedal
released position switch
ground[Ignition switch "ON"]Approximately 0V
A22 LGAccelerator pedal position
sensor 1 ground[Ignition switch "ON"]Approximately 0V
A23 B Sensor's ground[Engine is running]
lWarm-up condition
lIdle speedApproximately 0V
PBIB0387E
PBIB0388E
PBIB0389E
PBIB0390E

TROUBLE DIAGNOSIS
EC-687
[YD]
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ECA24 BMass air flow sensor
ground[Engine is running]lWarm-up condition
lIdle speedApproximately 0V
A25 G/W Injector's ground[Engine is running]
lWarm-up condition
lIdle speedApproximately 0V
A26 LG/RAccelerator pedal position
sensor 2 ground[Ignition switch "ON"]Approximately 0V
A27 W Sensor's power supply[Ignition switch "ON"]Approximately 5V
A28 PU/RAccelerator pedal position
sensor 1 power supply[Ignition switch "ON"]Approximately 5V
A29 W/PU EDU injector check signal[Engine is running]
lWarm-up condition
lIdle speed1-5V
[Engine is running]
lWarm-up condition
lEngine speed is 2,000 rpm1-5V
A31 W/L Power supply for ECM[Ignition switch “ON”]BATTERY VOLTAGE
(11 - 14V)
B3
B4
B5
B6W
OR/B
W/L
GYEGR volume control valve[Engine is running]
lWarm-up condition
lIdle speed0.1 - 14V
(Voltage signals of each ECM ter-
minals differ according to the con-
trol position of EGR volume
control valve.)
B9 G/BFuel injector adjustment
resistor No.2
[Ignition switch "ON"]0.2 - 4.8V
(There are individual differences
between fuel injector adjustment
resistors.) B10 Y/BFuel injector adjustment
resistor No.4
B11 R/BFuel injector adjustment
resistor No.3
B12 W/BFuel injector adjustment
resistor No.1
B13
B14Y/R
Y/RCommon rail fuel pressure
sensor[Engine is running]
lWarm-up condition
lIdle speed1.6 - 1.8V
[Engine is running]
lWarm-up condition
lEngine speed is 2,000 rpm1.8 - 2.0V TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)
PBIB0391E
PBIB0392E

EC-688
[YD]
TROUBLE DIAGNOSIS
B15 WAccelerator pedal position
sensor 1[Ignition switch "ON"]lAccelerator pedal fully released0.8 - 1.3V
[Ignition switch "ON"]
lAccelerator pedal fully depressedMore than 3.5V
B16 GAccelerator pedal position
sensor 2[Ignition switch "ON"]
lAccelerator pedal fully released0.3 - 1.8V
[Ignition switch "ON"]
lAccelerator pedal fully depressedMore than 3.0V
B18 R/GCamshaft position sensor
ground[Engine is running]
lWarm-up condition
lIdle speedApproximately 0V
B19 R/Y Camshaft position sensor[Engine is running]
lWarm-up condition
lIdle speed0-3V
[Engine is running]
lWarm-up condition
lEngine speed is 2,000 rpm0-8V
B20 L/RCrankshaft position sen-
sor (TDC) ground[Engine is running]
lWarm-up condition
lIdle speedApproximately 0V
B21 L/GCrankshaft position sen-
sor (TDC)[Engine is running]
lWarm-up condition
lIdle speed0-12.5V
[Engine is running]
lWarm-up condition
lEngine speed is 2,000 rpm0-30.0V
B23 GY/LAccelerator pedal position
sensor 2 power supply[Ignition switch “ON”]Approximately 5V TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)
PBIB0393E
PBIB0394E
PBIB0395E
PBIB0396E

TROUBLE DIAGNOSIS
EC-691
[YD]
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EC
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
CONSULT-II FunctionEBS0037H
CONSULT-II INSPECTION PROCEDURE
1. Turn ignition switch OFF.
2. Connect CONSULT-II to data link connector, which is located
under the driver side dash panel.
E12 P/BPower steering oil pres-
sure switch[Engine is running]lSteering wheel is being turnedApproximately 0V
[Engine is running]
lSteering wheel is not being turnedBATTERY VOLTAGE
(11 - 14V)
E13 G/ORPark/Neutral position
switch[Ignition switch “ON”]
lGear position is "Neutral"Approximately 0V
[Ignition switch “ON”]
lExcept the above gear positionBATTERY VOLTAGE
(11 - 14V)
E16 G/W Suction control valve 2[Engine is running]
lWarm-up condition
lIdle speed0-12.5V
[Engine is running]
lWarm-up condition
lEngine speed is 2,000 rpm0-12.5V
E21 L/B Vehicle speed sensor[Engine is running]
lLift up the vehicle
lIn 2nd gear position
lVehicle speed is 30 km/h (19 MPH)0-5V TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)
PBIB0401E
PBIB0402E
PBIB0386E
PBIB0376E

EC-692
[YD]
TROUBLE DIAGNOSIS
3. Turn ignition switch ON.
4. Touch “START”.
5. Touch “ENGINE”.
6. Perform each diagnostic test mode according to each service
procedure.
For further information, see the CONSULT-II Operation Manual.
ENGINE CONTROL COMPONENT PARTS/CONTROL SYSTEMS APPLICATION
X: Applicable
SEF995X
PBIB0410E
ItemDIAGNOSTIC TEST MODE
SELF-DIAG
RESULTSDATA MONI-
TO RACTIVE
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´´

TROUBLE DIAGNOSIS
EC-693
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EC
SELF-DIAGNOSTIC MODE
Regarding items detected in “SELF-DIAG RESULTS” mode, refer to —EC-654, "INDEX FOR DTC".
DATA MONITOR MODE
MONITOR ITEMECM
input
signalMain
signalsCONDITION SPECIFICATION
CKPS ·RPM (TDC) [rpm]´´
lThe engine speed computed from
the crankshaft position sensor (TDC)
signal is displayed.
COOLAN TEMP/S
[°C] or [°F]´´
lThe engine coolant temperature
(determined by the signal voltage of
the engine coolant temperature sen-
sor) is displayed.When the engine coolant temperature
circuit is open or short, ECM enters fail-
safe mode. The engine coolant temper-
ature determined by the ECM is dis-
played.
VHCL SPEED SE
[km/h] or [mph]´´
lThe vehicle speed computed form
the vehicle speed sensor signal is
displayed.
FUEL TEMP SEN [°C] or [°F]´´
lThe fuel temperature (determined by
the signal voltage of the fuel temper-
ature sensor) is displayed.
ACCEL POS SEN [V]´´
lThe accelerator pedal position sen-
sor 1 signal voltage is displayed.
ACCEL SEN 2 [V]´´
lThe accelerator pedal position sen-
sor 2 signal voltage is displayed.
OFF ACCEL SW [ON/OFF]´´
lindicates [ON/OFF] condition from
the accelerator pedal released posi-
tion switch signal.
ACT CR PRESS [MPa]´´
lThe common rail fuel pressure
(determined by the signal voltage of
the common rail fuel pressure sen-
sor) is displayed.
BATTERY VOLT [V]´´
lThe power supply voltage of ECM is
displayed.
P/N POSI SW [ON/OFF]´´
lIndicates [ON/OFF] condition from
the park/neutral position switch sig-
nal.
START SIGNAL [ON/OFF]´´
lindicates [ON/OFF] condition from
the starter signal.
PW/ST SIGNAL [ON/OFF]´
lindicates [ON/OFF] condition from
the power steering oil pressure
switch signal.
BRAKE SW [ON/OFF]´´
lindicates [ON/OFF] condition from
thestoplampswitchsignal.
IGN SW [ON/OFF]´´
lIndicates [ON/OFF] condition from
ignition switch signal.
MAS AIR/FL SE [V]´´
lThe signal voltage of the mass air
flow sensor is displayed.
SUCTION CV [°CA]´
lIndicates [°CA] of suction control
valve operating angle.
MAIN INJ WID [msec]´
lIndicates the actual fuel injection
pulse width compensated by ECM
according to the input signals.
GLOW RLY [ON/OFF]´
lThe glow relay control condition
(determined by ECM according to
the input signal) is displayed.

EC-694
[YD]
TROUBLE DIAGNOSIS
NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
ACTIVE TEST MODE
COOLING FAN
[LOW/HI/OFF]´
lIndicates the control condition of the
cooling fans (determined by ECM
according to the input signal).
LOW ... Operates at low speed.
HI ... Operates at high speed.
OFF ... Stopped
EGR VOL CON/V [step]´
lIndicates the EGR volume control
value computed by the ECM accord-
ing to the input signals.
lThe opening becomes larger as the
value increases.
INT/AVOLUME[mg/]
lThe intake air volume computed from
the mass air flow sensor signal is dis-
played.
BARO SEN [kPa]´´
lThe barometric pressure (deter-
mined by the signal voltage from the
absolute pressure sensor built into
the ECM) is displayed.
CYL COUNT [0/1/2/3]
lThe cylinder being injected is dis-
played.
0 ... Cylinder No.1 is injected.
1 ... Cylinder No.3 is injected.
2 ... Cylinder No.4 is injected.
3 ... Cylinder No.2 is injected.
Vo ltag e [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. [Hz] or [%] Frequency [msec], [Hz] or
[%]
DUTY-HI
DUTY-LOW
PLS WIDTH-HI
PLS WIDTH-LOWMONITOR ITEMECM
input
signalMain
signalsCONDITION SPECIFICATION
TEST ITEM CONDITION JUDGEMENT CHECK ITEM (REMEDY)
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-IIEngine runs rough or dies.
lHarness and connectors
lCompression
lFuel injectors
COOLING FAN
lIgnition switch: ON
lOperate the cooling fan at “LOW”,
“HI” speed and turn “OFF” using
CONSULT-II.Cooling fan moves at “LOW”, “HI”
speed and stops.
lHarness and connector
lCooling fan motor
lCooling fan relay
OFF ACCEL PO
SIG
lThis mode is used for ECM to learn accelerator pedal released positions.

EC-698
[YD]
TROUBLE DIAGNOSIS
NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
Major Sensor Reference Graph in Data Monitor ModeEBS0037J
The following are the major sensor reference graphs in “DATA MONITOR” mode.
ACCEL POS SEN, “CKPS·RPM (TDC)”, “MAS AIR/FL SE”
Below is the data for “ACCEL POS SEN”, “CKPS·RPM (TDC)” and “MAS AIR/FL SE” when revving engine
quickly up to 3,000 rpm under no load after warming up engine to the normal operating temperature.
Each value is for reference, the exact value may vary.
SEF321Y

EC-706
[YD]
DTC P0100 MASS AIR FLOW SENSOR (MAFS)
DTCP0100MASSAIRFLOWSENSOR(MAFS)
PFP:22680
Component DescriptionEBS004Q0
The mass air flow sensor (MAFS) is placed in the stream of intake
air. It measures the intake air flow rate by measuring a part of the
entire intake air flow. It consists of a hot film that is supplied with
electric current from the ECM. The temperature of the hot film is con-
trolled by the ECM a certain amount. The heat generated by the hot
film is reduced as the intake air flows around it. The more air, the
greater the heat loss.
Therefore, the ECM must supply more electric current to maintain
the temperature of the hot film as air flow increases. The ECM
detects the air flow by means of this current change.
CONSULT-II Reference Value in Data Monitor ModeEBS004Q1
Specification data are reference values.
ECM Terminals and Reference ValueEBS00BR6
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.
SEF987W
MONITOR ITEM CONDITION SPECIFICATION
MAS AIR/FL SE
lEngine: After warming up
lAir conditioner switch: “OFF”
lShift lever: Neutral position
lNo-loadIdle 1.0 - 2.5V
2,000 rpm 2.1 - 2.7V
TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)
A8
A9R
RPower supply for ECM[Ignition switch "ON"]BATTERY VOLTAGE
(11 - 14V)
A10 R Mass air flow sensor[Engine is running]
lWarm-up condition
lIdle speed0.5 - 2.5V
[Engine is running]
lWarm-up condition
lEngine speed is 2,000 rpm1.5 - 3.5V
A24 BMass air flow sensor
ground[Engine is running]
lWarm-up condition
lIdle speedApproximately 0V
A27 W Sensor's power supply[Ignition switch "ON"]Approximately 5V
PBIB0389E
PBIB0390E