2005 NISSAN X-TRAIL Combination meter

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

DTC P0503 ASCD VEHICLE SPEED SENSOR
EC-1205
[YD (WITH EURO-OBD)]
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Diagnostic ProcedureEBS01FC8
1. CHECK DTC WITH ESP/TCS/ABS CONTROL UNIT (MODELS WITH ESP) OR ABS ACTUATOR AND
ELECTRIC UNIT (CONTROL UNIT) (MODELS WITHOUT ESP)
Refer to BRC-60, "
TROUBLE DIAGNOSIS" (models with ESP system) or BRC-12, "TROUBLE DIAGNOSIS"
(models without ESP system).
OK or NG
OK >> GO TO 2.
NG >> Repair or replace.
2. CHECK COMBINATION METER
Check combination meter function.
Refer to DI-4, "
COMBINATION METERS" .
>>INSPECTION END

EC-1310
[YD (WITH EURO-OBD)]
GLOW CONTROL SYSTEM

6. CHECK COMBINATON METER OPERATION
Does combination meter operate normally?
Ye s o r N o
Yes >> GO TO 14.
No >> Check combination meter circuit. Refer to DI-4, "
COMBINATION METERS" .
7. CHECK GLOW RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect glow relay.
3. Check voltage between glow relay terminals 1, 3 and ground
with CONSULT-II or tester.
OK or NG
OK >> GO TO 9.
NG >> GO TO 8.
8. DETECT MALFUNCTIONING PART
Check the following.

60A fusible link

Harness for open or short between glow relay and battery
>> Repair harness or connectors.
9. CHECK GLOW RELAY OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 37 and glow relay terminal 2.
Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 11.
NG >> GO TO 10.
MBIB0078E
Voltage: Battery voltage
PBIB1413E
Continuity should exist.

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

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.

EC-1344
[YD (WITH EURO-OBD)]
ASCD INDICATOR

Diagnostic ProcedureEBS01F8H
1. CHECK OVERALL FUNCTION
Check ASCD indicator under the following conditions.
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
2. CHECK DTC
Check that DTC U1000 is not displayed.
OK or NG
OK >> Perform trouble diagnoses for DTC U1000. Refer to EC-1056, "DTC U1000 CAN COMMUNICA-
TION LINE" .
NG >> GO TO 3.
3. CHECK COMBINATION METER OPERATION
Does combination meter operate normally?
Ye s o r N o
Yes >> GO TO 4.
No >> Check combination meter circuit. Refer to DI-4, "
COMBINATION METERS" .
4. CHECK INTERMITTENT INCIDENT
Refer to EC-1045, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
ASCD INDICATOR CONDITION SPECIFICATION
CRUISE LAMP

Ignition switch: ON
MAIN switch: Pressed at the
first time→at the 2nd timeON→OFF
SET LAMP

MAIN switch: ON

When vehicle speed is
between 40 km/h (25 MPH)
and 185 km/h (115 MPH)

COAST/SET switch pressed ON

COAST/SET switch released OFF

EC-1366
[YD (WITHOUT EURO-OBD)]
ENGINE CONTROL SYSTEM

×: Applicable
4WD Models Without ESP
SYSTEM DIAGRAM
INPUT/OUTPUT SIGNAL CHART
T: Transmit R: Receive Steering angle sensor××
4WD control unit××
Combination meter×××× Body typeWagon
Axle 4WD 2WD
EngineYD22DDTi
TransmissionM/T
Brake control ABS ESP ABS ESP
PKIA6458E
Signals ECMABS actuator and
electric unit
(control unit)4WD control unit Combination meter
4WD mode indicator lamp signal T R
4WD warning lamp signalTR
A/C compressor feedback signal T R
ABS warning lamp signal T R
Accelerator pedal position signal T R
Engine coolant temperature signal T R
Engine speed signal T R R
MI signal T R
Parking brake switch signalRT
Stop lamp switch signal T R
Vehicle speed signalTRR
RT
ASCD SET lamp signal T R
ASCD CRUISE lamp signal T R
Stop lamp switch signal T R

ENGINE CONTROL SYSTEM
EC-1367
[YD (WITHOUT EURO-OBD)]
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4WD Models With ESP
SYSTEM DIAGRAM
INPUT/OUTPUT SIGNAL CHART
T: Transmit R: Receive Glow indicator lamp signal T R
A/C switch signal R TSignals ECMABS actuator and
electric unit
(control unit)4WD control unit Combination meter
Signals ECMESP/TCS/ABS
control unitSteering angle
sensor4WD control
unitCombination
meter
4WD mode indicator lamp signalTR
4WD warning lamp signalTR
A/C switch signal RT
ABS warning lamp signal T R
Accelerator pedal position signal T R R
Brake warning lamp signal T R
Engine coolant temperature signal TR
Engine speed signal T R R R
ESP OFF indicator lamp signal T R
Glow indicator lamp signal TR
MI signal TR
Stop lamp switch signal T R
Vehicle speed signalTRR
RT
SLIP indicator lamp signal T R
Parking brake switch signalRT
Steering angle sensor signal R T
ASCD SET lamp signal TR
ASCD CRUISE lamp signal TR
PKIA9634E