2005 NISSAN X-TRAIL AUTOMATIC

EC-1204
[YD (WITH EURO-OBD)]
DTC P0503 ASCD VEHICLE SPEED SENSOR

DTC P0503 ASCD VEHICLE SPEED SENSORPFP:24810
Component DescriptionEBS01FC5
The ECM receives vehicle speed sensor signal via CAN communication line. It is sent from combination
meter. The ECM uses this signal for ASCD control. Refer to EC-1339, "
AUTOMATIC SPEED CONTROL
DEVICE (ASCD)" for ASCD functions.
On Board Diagnosis LogicEBS01FC6
This self-diagnosis has the one trip detection logic.
MI will not light up for this self-diagnosis.
NOTE:

If DTC P0503 is displayed with DTC U1000 first perform the trouble diagnosis for DTC U1000. Refer
to EC-1056, "
DTC U1000 CAN COMMUNICATION LINE" .
DTC Confirmation ProcedureEBS01FC7
CAUTION:
Always drive vehicle at a safe speed.
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.
TESTING CONDITION:
Step 3 may be conducted with the drive wheels lifted in the shop or by driving the vehicle. If a road test
is expected to be easier, it is unnecessary to lift the vehicle.
WITH CONSULT-II
1. Start engine (ESP switch OFF).
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Drive the vehicle at more than 10 km/h (6 MPH) for at least 5
seconds.
4. If DTC is detected, go to EC-1205, "
Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-II” above.
DTC No.Trouble Diagnosis
NameDTC Detecting Condition Possible Cause
P0503
0503Vehicle speed sen-
sor circuit high inputVehicle speed signal is excessively high com-
pared with the driving condition.

Harness or connectors
(The CAN communication line is open or
shorted.)

Combination meter

ABS actuator and electric unit (control unit)
(models without ESP)

ESP/TCS/ABS control unit (models with ESP)

Wheel sensor

ECM
SEF058YMBIB1085E

EC-1206
[YD (WITH EURO-OBD)]
DTC P0504 ASCD BRAKE SWITCH

DTC P0504 ASCD BRAKE SWITCHPFP:25320
Component DescriptionEBS01FC9
When the brake pedal is depressed, ASCD brake switch (1) and
stop lamp switch (2) are turned ON. ECM detects the state of the
brake pedal by this input of two kinds (ON/OFF signal).
Refer to EC-1339, "
AUTOMATIC SPEED CONTROL DEVICE
(ASCD)" for the ASCD function.
CONSULT-II Reference Value in Data Monitor ModeEBS01FCA
Specification data are reference values.
On Board Diagnosis LogicEBS01FCC
This self-diagnosis has the one trip detection logic.
MI will not light up for this diagnosis.
PBIB2882E
MONITOR ITEM CONDITION SPECIFICATION
BRAKE SW

Ignition switch: ONBrake pedal: Fully released OFF
Brake pedal: Slightly
depressedON
BRAKE SW2

Ignition switch: ONBrake pedal and clutch pedal:
Fully releasedOFF
Brake pedal and/or clutch
pedal: Slightly depressedON
DTC No.Trouble Diagnosis
NameDTC Detecting Condition Possible Cause
P0504
0504ASCD brake switch

When the vehicle speed is above 5 km/h (3
MPH), ON signal from the stop lamp switch
and OFF signal from the ASCD brake
switch are sent to the ECM at the same
time.

Harness or connectors
(The stop lamp switch circuit is open or
shorted.)

Harness or connectors
(The ASCD brake switch circuit is open or
shorted.)

Harness or connectors
(The ASCD clutch switch circuit is open or
shorted.)

Stop lamp switch

ASCD brake switch

ASCD clutch switch

Incorrect stop lamp switch installation

Incorrect ASCD brake switch installation

Incorrect ASCD clutch switch installation

ECM

EC-1218
[YD (WITH EURO-OBD)]
DTC P0580, P0581 ASCD STEERING SWITCH

DTC P0580, P0581 ASCD STEERING SWITCHPFP:25551
Component DescriptionEBS01F9V
ASCD steering switch has variant values of electrical resistance for each button. ECM reads voltage variation
of switch, and determines which button is operated.
Refer to EC-1339, "
AUTOMATIC SPEED CONTROL DEVICE (ASCD)" for the ASCD function.
CONSULT-II Reference Value in Data Monitor ModeEBS01F9W
Specification data are reference values.
1. ASCD steering switch 2. RESUME/ACCELERATE switch 3. CANCEL switch
4. SET/COAST switch 5. MAIN switch
PBIB2877E
MONITOR ITEM CONDITION SPECIFICATION
MAIN SW

Ignition switch: ONMAIN switch: Released OFF
MAIN switch: Pressed ON
CANCEL SW

Ignition switch: ONCANCEL switch: Released OFF
CANCEL switch: Pressed ON
RESUME/ACC SW

Ignition switch: ONRESUME/ACCELERATE switch:
ReleasedOFF
RESUME/ACCELERATE switch:
PressedON
SET SW

Ignition switch: ONSET/COAST switch: Released OFF
SET/COAST switch: Pressed ON

BRAKE SWITCH
EC-1313
[YD (WITH EURO-OBD)]
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BRAKE SWITCHPFP:25230
DescriptionEBS011FZ
STOP LAMP SWITCH
The stop lamp switch (1) is installed to brake pedal bracket. The
switch senses brake pedal position and sends an ON-OFF signal to
the ECM. The ECM uses the signal to control the fuel injection con-
trol system.
ASCD BRAKE SWITCH (MODELS WITH ASCD)
When depress on the brake pedal, ASCD brake switch is turned OFF and stop lamp switch is turned ON. ECM
detects the state of the brake pedal by this input of two kinds (ON/OFF signal)
Refer to EC-1339, "
AUTOMATIC SPEED CONTROL DEVICE (ASCD)" for the ASCD function.
CONSULT-II Reference Value in Data Monitor ModeEBS011WF
Specification data are reference values.
PBIB2883E
MONITOR ITEM CONDITION SPECIFICATION
BRAKE SW

Ignition switch: ONBrake pedal: Fully released OFF
Brake pedal: Slightly
depressedON
BRAKE SW2

Ignition switch: ONBrake pedal and clutch pedal:
Fully releasedOFF
Brake pedal and/or clutch
pedal: Slightly depressedON

AUTOMATIC SPEED CONTROL DEVICE (ASCD)
EC-1339
[YD (WITH EURO-OBD)]
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AUTOMATIC SPEED CONTROL DEVICE (ASCD)PFP:18930
System DescriptionEBS01F8C
INPUT/OUTPUT SIGNAL CHART
BASIC ASCD SYSTEM
Refer to Owner's Manual for ASCD operating instructions.
Automatic Speed Control Device (ASCD) allows a driver to keep vehicle at predetermined constant speed
without depressing accelerator pedal. Driver can set vehicle speed in advance between approximately 40 km/
h (25 MPH) and 185 km/h (115 MPH).
ECM controls fuel injection value to regulate engine speed.
Operation status of ASCD is indicated by CRUISE indicator and SET indicator in combination meter. If any
malfunction occurs in ASCD system, it automatically deactivates control.
SET OPERATION
Press ASCD MAIN switch. (The CRUISE indicator in combination meter illuminates.)
When vehicle speed reaches a desired speed between approximately 40 km/h (25 MPH) and 185 km/h (115
MPH), press SET switch. (Then SET indicator in combination meter illuminates.)
ACCEL OPERATION
If the RESUME/ACCELERATE switch is depressed during cruise control driving, increase the vehicle speed
until the switch is released or vehicle speed reaches maximum speed controlled by the system.
And then ASCD will keep the new set speed.
CANCEL OPERATION
When any of following conditions exist, cruise operation will be canceled.

CANCEL switch is depressed

More than 2 switches at ASCD steering switch are depressed at the same time (Set speed will be
cleared.).

Brake pedal is depressed

Clutch pedal is depressed or gear position is changed to the neutral position

Vehicle speed increased to 13 km/h higher than the set speed

Vehicle speed decreased to 13 km/h lower than the set speed

ESP system is operated
When the ECM detects any of the following conditions, the ECM will cancel the cruise operation and inform
the driver by blinking indicator lamp.

Malfunction for some self-diagnoses regarding ASCD control: SET lamp will blink quickly.
If MAIN switch is turned to OFF during ASCD is activated, all of ASCD operations will be canceled and vehicle
speed memory will be erased.
COAST OPERATION
When the SET/COAST switch is depressed during cruise control driving, decrease vehicle set speed until the
switch is released. And then ASCD will keep the new set speed.
RESUME OPERATION
When the RESUME/ACCELERATE switch is depressed after cancel operation other than depressing MAIN
switch is performed, vehicle speed will return to last set speed. To resume vehicle set speed, vehicle condition
must meet following conditions.

Brake pedal is released

Clutch pedal is released

Vehicle speed is greater than 40 km/h (25 MPH) and less than 185 km/h (115 MPH)
Sensor Input signal to ECM ECM function Actuator
ASCD brake switch Brake pedal operation
ASCD vehicle speed control Fuel injector and Fuel pump Stop lamp switch Brake pedal operation
ASCD clutch switch Clutch pedal operation
ASCD steering switch ASCD steering switch operation
Combination meter Vehicle speed

EC-1340
[YD (WITH EURO-OBD)]
AUTOMATIC SPEED CONTROL DEVICE (ASCD)

Component DescriptionEBS01F8D
ASCD STEERING SWITCH
Refer to EC-1218 .
ASCD BRAKE SWITCH
Refer to EC-1206 and EC-1313 .
ASCD CLUTCH SWITCH
Refer to EC-1206 and EC-1313 .
STOP LAMP SWITCH
Refer to EC-1206 and EC-1313 .
ASCD INDICATOR
Refer to EC-1341 .

ASCD INDICATOR
EC-1341
[YD (WITH EURO-OBD)]
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ASCD INDICATORPFP:24814
Component DescriptionEBS01F8E
ASCD indicator lamp illuminates to indicate ASCD operation status. The Lamp has two indicators, CRUISE
and SET, and is integrated in combination meter.
CRUISE indicator illuminates when MAIN switch on ASCD steering switch is turned ON to indicated that
ASCD system is ready for operation.
SET indicator illuminates when the following conditions are met.

CRUISE indicator is illuminated.

SET/COAST switch on ASCD steering switch is turned ON while vehicle speed is within the range of
ASCD setting.
SET indicator remains lit during ASCD control.
Refer to EC-1339, "
AUTOMATIC SPEED CONTROL DEVICE (ASCD)" for the ASCD function.

TROUBLE DIAGNOSIS
EC-1409
[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
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.
SET SW
[ON/OFF]×

Indicates [ON/OFF] condition from SET/
COAST switch signal.
RESUME/ACC SW
[ON/OFF]×

Indicates [ON/OFF] condition from
RESUME/ACCELERATE switch signal.
CANCEL SW
[ON/OFF]×

Indicates [ON/OFF] condition from CAN-
CEL switch signal.
MAIN SW
[ON/OFF]×

Indicates [ON/OFF] condition from MAIN
switch signal.
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: Neutral position

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