2003 NISSAN X-TRAIL relay

EC-1236
[YD (WITHOUT EURO-OBD)]
TROUBLE DIAGNOSIS

1 - 5: The numbers refer to the order of inspection.
(continued on next page)
ENGINE CONTROL
Crankshaft position sensor circuit 1 1 1 1 1 1 1 1 1 1EC-1351
Camshaft position sensor circuit 3 3EC-1363
Turbocharger boost sensor circuit 1 1 1EC-1471
Turbocharger boost control solenoid
valve circuit111EC-1471
Start signal circuit 1 1 1 1 1 1 1 1 1EC-1496
Ignition switch circuit 1 1 1 1EC-1261
Power supply for ECM circuit 1 1 1 1EC-1261
Cooling fan relay circuitEC-1320
EGR volume control valve circuit 1 1 1EC-1465
Glow relay circuit 1 1 1 1EC-1457
ECM relay (Self-shutoff) circuit 1 1 1 1EC-1399
ECM, connector circuit 2 2 2 2 2 2 2 2 2 2 2 2 2EC-1378,
EC-1455
NATS (Nissan Anti-theft System) 1EC-1224
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

EC-1238
[YD (WITHOUT EURO-OBD)]
TROUBLE DIAGNOSIS

1 - 5: The numbers refer to the order of inspection.
ENGINE CONTROLCrankshaft position sensor circuit 1 1 1 1EC-1351
Camshaft position sensor circuit11EC-1363
Turbocharger boost sensor circuit 1 1EC-1345
Turbocharger boost control solenoid valve cir-
cuit11EC-1471
Start signal circuitEC-1496
Ignition switch circuitEC-1261
Power supply for ECM circuit11EC-1261
Cooling fan relay circuit 2EC-1320
EGR volume control valve circuit 1EC-1465
Glow relay circuit1EC-1457
ECM relay (Self-shutoff) circuit1EC-1399
ECM, connector circuit22222222222EC-1378,EC-
1455
NATS (Nissan Anti-theft System)1EC-1224
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

TROUBLE DIAGNOSIS
EC-1247
[YD (WITHOUT EURO-OBD)]
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19 L Air conditioner relay[Engine is running]

Air conditioner switch is OFFBATTERY VOLTAGE
(11 - 14V)
[Engine is running]

Both air conditioner switch and blower fan
switch are ON (Compressor is operating)Approximately 0.1V
21
22
23
24G/R
GY/L
G/R
GY/LFuel injector No. 2
Fuel injector No. 2
Fuel injector No. 3
Fuel injector No. 3[Engine is running]

Warm-up condition

Idle speed0 - 9V
[Engine is running]

Warm-up condition

Engine speed is 2,000 rpm0 - 9V
25
26
27
28GY
W/L
OR/B
GY/BEGR volume control valve[Engine is running]

Warm-up condition

Idle speed0.1 - 14V
(Voltage signals of each ECM ter-
minals differ according to the con-
trol position of EGR volume
control valve.)
29 L Fuel pump[Engine is running]

Warm-up condition

Idle speed0.5 - 1.0V
[Engine is running]

Warm-up condition

Engine speed is 2,000 rpm0.5 - 1.0V
34 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
36 LG Cooling fan relay (Low)[Engine is running]

Cooling fan is not operating

Cooling fan is operating at high speedBATTERY VOLTAGE
(11 - 14V)
[Engine is running]

Cooling fan is operating at low speedApproximately 0.1V TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)
MBIB0881E
MBIB0882E
MBIB0887E
MBIB0888E

EC-1248
[YD (WITHOUT EURO-OBD)]
TROUBLE DIAGNOSIS

37 W/R Glow relay Refer to EC-1457, "GLOW CONTROL SYSTEM" .
39 B/OR Fuel transport pump relay[Engine is running]

Some fuel is in the fuel tankApproximately 0V
[Engine is running]

No fuel is in the fuel tankBATTERY VOLTAGE
(11 - 14V)
40
41
42
43G/R
GY/L
G/R
GY/LFuel injector No. 4
Fuel injector No. 4
Fuel injector No. 1
Fuel injector No. 1[Engine is running]

Warm-up condition

Idle speed0 - 9V
[Engine is running]

Warm-up condition

Engine speed is 2,000 rpm0 - 9V
44 L/WCrankshaft position sen-
sor power supply[Ignition switch ON]Approximately 5.3V
45 G/ORCamshaft position sensor
power supply[Ignition switch ON]Approximately 5.3V
46 L Crankshaft position sensor[Engine is running]

Warm-up condition

Idle speed0 - 6V
[Engine is running]

Warm-up condition

Engine speed is 2,000 rpm0 - 6V TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)
MBIB0881E
MBIB0882E
MBIB0879E
MBIB0880E

TROUBLE DIAGNOSIS
EC-1251
[YD (WITHOUT EURO-OBD)]
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: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
CONSULT-II FunctionEBS011XL
FUNCTION
92 YAccelerator pedal position
sensor 2 ground[Ignition switch ON]Approximately 0.3V
95 G/R CAN communication line[Ignition switch ON]Approximately 2.6 - 3.2V
Output voltage varies with the
communication status.
99 B/Y Start signal[Ignition switch ON]Approximately 0.3V
[Ignition switch START]BATTERY VOLTAGE
(11 - 14V)
100 P Stop lamp switch[Ignition switch ON]

Brake pedal: Fully releasedApproximately 0V
[Ignition switch ON]

Brake pedal: DepressedBATTERY VOLTAGE
(11 - 14V)
105 G ECM relay (self-shutoff)[Ignition switch ON]
[Ignition switch OFF]

For a few seconds after turning ignition
switch OFFApproximately 1.2V
[Ignition switch OFF]

More than a few seconds after turning igni-
tion switch OFFBATTERY VOLTAGE
(11 - 14V)
107
108W/R
W/RIgnition switch [Ignition switch ON]BATTERY VOLTAGE
(11 - 14V)
110 G/ORPark/Neutral position
switch[Ignition switch ON]

Gear position is Neutral Approximately 0V
[Ignition switch ON]

Except the above gear positionBATTERY VOLTAGE
(11 - 14V)
111 P / BPower steering pressure
switch[Engine is running]

Steering wheel is being turnedApproximately 0V
[Engine is running]

Steering wheel is not being turnedBATTERY VOLTAGE
(11 - 14V)
113 G ECM relay (self-shutoff)[Ignition switch ON]
[Ignition switch OFF]

For a few seconds after turning ignition
switch OFFApproximately 1.2V
[Ignition switch OFF]

More than a few seconds after turning igni-
tion switch OFFBATTERY VOLTAGE
(11 - 14V)
114 B ECM ground[Engine is running]

Idle speedApproximately 0V
11 9
120Y
RPower supply for ECM[Ignition switch ON]BATTERY VOLTAGE
(11 - 14V)
121 W/LPower supply for ECM
(Back-up)[Ignition switch OFF]BATTERY VOLTAGE
(11 - 14V) TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)
Diagnostic test mode Function
Self-diagnostic results Self-diagnostic results such as DTCs and freeze frame data can be read and erased quickly.*
Data monitor Input/Output data in the ECM can be read.

TROUBLE DIAGNOSIS
EC-1253
[YD (WITHOUT EURO-OBD)]
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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
SELF-DIAGNOSTIC MODE
Self Diagnostic Item
Regarding items detected in “SELF-DIAG RESULTS” mode, refer to EC-1205, "INDEX FOR DTC" .
Freeze Frame Data
PBIB2453E
ItemDIAGNOSTIC TEST MODE
SELF-DIAG RESULTS
DATA MON-
ITORACTIVE
TEST
DTCFREEZE
FRAME
DATA
ENGINE CONTROL COMPONENT PARTS
INPUTCrankshaft position sensor×××
Camshaft position sensor×
Engine coolant temperature sensor××××
Vehicle speed sensor×××
Fuel pump temperature sensor××
Accelerator pedal position sensor 1××
Accelerator pedal position sensor 2××
Fuel rail pressure sensor××
Mass air flow sensor××
Intake air temperature sensor×
Turbocharger boost sensor×××
Battery voltage××
Park/neutral position (PNP) switch×
Power steering pressure switch×
Stop lamp switch×
Barometric pressure sensor (built-into ECM)××
Fuel injector adjustment resistor×
OUTPUTFuel pump×××
Fuel injector×××
Glow relay××
Cooling fan relay×××
EGR volume control valve××
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-1205, "
INDEX FOR DTC" .)
CAL/LD VALUE [%]

The calculated load value at the moment a malfunction is detected is displayed.

EC-1254
[YD (WITHOUT EURO-OBD)]
TROUBLE DIAGNOSIS

DATA MONITOR MODE
COOLANT TEMP [°C] or
[°F]
The engine coolant temperature at the moment a malfunction is detected is displayed.
ENGINE SPEED [rpm]

The engine speed at the moment a malfunction is detected is displayed.
VEHICL SPEED [km/h] or
[mph]

The vehicle speed at the moment a malfunction is detected is displayed.
INT MANI PRES [kPa]

The intake manifold pressure at the moment a malfunction is detected is displayed. Freeze frame data item Description
MONITOR ITEMECM
INPUT
SIGNALMAIN
SIG-
NALSCONDITION SPECIFICATION
CKPS·RPM (TDC) [rpm]××

The engine speed computed from the
crankshaft position sensor signal is dis-
played.
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 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 (determined by the
signal voltage of the fuel pump tempera-
ture sensor) is displayed.
ACCEL POS SEN [V]××

The accelerator pedal position sensor 1
signal voltage is displayed.
ACCEL SEN 2 [V]××

The accelerator pedal position sensor 2
signal voltage is displayed.
ACT CR PRESS [MPa]××

The Fuel rail pressure (determined by the
signal voltage of the fuel rail pressure
sensor) is displayed.
BATTERY VOLT [V]××

The power supply voltage of ECM is dis-
played.
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 pressure switch signal.
BRAKE SW [ON/OFF]××

indicates [ON/OFF] condition from the
stop lamp switch signal.
IGN SW [ON/OFF]××

Indicates [ON/OFF] condition from igni-
tion switch signal.
MAS AIR/FL SE [V]××

The signal voltage of the mass air flow
sensor is displayed.
MAIN INJ WID [msec]×

Indicates the actual fuel injection pulse
width compensated by ECM according to
the input signals.
PUMP CURRENT [mA]×

Indicates the fuel pump power supply
current from the ECM.
GLOW RLY [ON/OFF]×

The glow relay control condition (deter-
mined by ECM according to the input sig-
nal) is displayed.

TROUBLE DIAGNOSIS
EC-1255
[YD (WITHOUT EURO-OBD)]
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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]×

Indicates 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]×

Indicates the EGR volume control value
computed by the ECM according to the
input signals.

The opening becomes larger as the
value increases.
INT/A VOLUME [mg/]

The intake air volume computed from the
mass air flow sensor signal is displayed.
BARO SEN [kPa]××

The barometric pressure (determined by
the signal voltage from the absolute pres-
sure sensor built into the ECM) is dis-
played.
INT/M PRES SE [kPa]

Turbocharger boost (determined by the
signal voltage from the turbocharger
boost sensor) is displayed.
CYL COUNT [1/2/3/4]

The cylinder being injected is displayed.
1 ... Cylinder No.1 is injected.
2 ... Cylinder No.2 is injected.
3 ... Cylinder No.3 is injected.
4 ... Cylinder No.4 is injected.
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. [Hz] or
[%] Frequency [msec], [Hz] or
[%]
DUTY-HI
DUTY-LOW
PLS WIDTH-HI
PLS WIDTH-LOWMONITOR ITEMECM
INPUT
SIGNALMAIN
SIG-
NALSCONDITION SPECIFICATION
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 injector
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
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