2003 NISSAN X-TRAIL ABS

ENGINE CONTROL SYSTEM
EC-41
[QR (WITH EURO-OBD)]
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M/T MODELS WITH ESP
System Diagram
Input/output Signal Chart
T: Transmit R: Receive
*1: YD engine models only
*2: QR engine models only
PKIA6459E
Signals ECMESP/TCS/ABS
control unitSteering angle
sensor4WD control
unitCombination
meter
Stop lamp switch signal T R
Engine speed signal T R R R
Engine coolant temperature signal TR
Accelerator pedal position signal T R R
A/C switch signal*
1RT
A/C compressor feedback signal*
2TR
Vehicle speed signalTRR
RT
ABS warning lamp signal T R
Brake warning lamp signal T R
SLIP indicator lamp signal T R
ESP OFF indicator lamp signal T R
4WD warning lamp signalTR
4WD mode indicator lamp signalTR
Parking brake switch signalRT
MI signal TR
Glow indicator lamp signal*
1TR
Steering angle sensor signal R T

EC-42
[QR (WITH EURO-OBD)]
ENGINE CONTROL SYSTEM

A/T MODELS WITH ESP
System Diagram
Input/output Signal Chart
T: Transmit R: Receive
PKIA6460E
Signals ECM TCMESP/TCS/
ABS control
unitSte ering
angle sensor4WD control
unitCombination
meter
Stop lamp switch signalRT
TR
P·N range signal R T
A/T position indicator lamp signal T R R
O/D OFF indicator signal T R
Overdrive control switch signal R T
Closed throttle position signal T R
Wide open throttle position signal T R
Engine speed signal T R R R
Engine coolant temperature signal TR
Accelerator pedal position signal T R R
Output shaft revolution signal R T
A/C compressor feedback signal TR
Vehicle speed signalTRR
RT
ABS warning lamp signal T R
Brake warning lamp signal T R
SLIP indicator lamp signal T R
ESP OFF indicator lamp signal T R
4WD warning lamp signalTR
4WD mode indicator lamp signalTR
Parking brake switch signalRT
MI signal TR
Steering angle sensor signal R T

ENGINE CONTROL SYSTEM
EC-43
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Engine and A/T integratedTR
RT
A/T self-diagnosis signal R TSignals ECM TCMESP/TCS/
ABS control
unitSteering
angle sensor4WD control
unitCombination
meter

TROUBLE DIAGNOSIS
EC-85
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1 - 6: The numbers refer to the order of inspection.
(continued on next page)Throttle position sensor circuit 12 22222 2EC-168
,
EC-229
,
EC-364
,
EC-366
,
EC-401
Accelerator pedal position sensor circuit 3212 2EC-
368,EC-
386 , EC-
393 , EC-
409
Heated oxygen sensor 1 circuit1232 22 2EC-176
,
EC-183
,
EC-193
,
EC-318
,
EC-324
Knock sensor circuit 2 2 3EC-242
Crankshaft position sensor (POS) circuit 2 2EC-247
Camshaft position sensor (PHASE) circuit 2 2EC-254
Vehicle speed signal circuit 2 3 3 3EC-272
Power steering pressure sensor circuit 2 3 3 3 3EC-274
ECM 22333333333EC-279,
EC-282
Intake valve timing control solenoid valve cir-
cuit332 13223 3EC-286
PNP switch circuit 3 33333 3EC-373
Refrigerant pressure sensor circuit 2 3 3 3 3 4EC-451
Electrical load signal circuit 3 3 3 3EC-456
Air conditioner circuit223333333 3 2AT C - 3 4,
MTC-3
ESP/TCS/ABS CONTROL UNIT
(models with ESP)
ABS actuator and electric unit (control unit)
(models without ESP)4BRC-11
,
BRC-58
SYMPTOM
Reference
page
HARD/NO START/RESTART (EXCP. HA)
ENGINE STALL
HESITATION/SURGING/FLAT SPOT
SPARK KNOCK/DETONATION
LACK OF POWER/POOR ACCELERATION
HIGH IDLE/LOW IDLE
ROUGH IDLE/HUNTING
IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEATS/WATER TEMPERATURE HIGH
EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION
BATTERY DEAD (UNDER CHARGE)
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA

EC-272
[QR (WITH EURO-OBD)]
DTC P0500 VSS

DTC P0500 VSSPFP:32702
DescriptionEBS010QK
NOTE:
If DTC P0500 is displayed with DTC U1000 or U1001, first perform the trouble diagnosis for DTC U1000,
U1001. Refer to EC-132, "
DTC U1000, U1001 CAN COMMUNICATION LINE" .
The vehicle speed signal is sent to the combination meter from the “ESP/TCS/ABS control unit” (with ESP
models) or “ABS actuator and electric unit (control unit)” (without ESP models) through CAN communication
line. The combination meter then sends a signal to the ECM through CAN communication line.
On Board Diagnosis LogicEBS010QL
DTC Confirmation ProcedureEBS010QM
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:
Steps 1 and 2 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.
2. Read “VHCL SPEED SE” in “DATA MONITOR” mode with CONSULT-II. The vehicle speed on CONSULT-
II should exceed 10 km/h (6 MPH) when rotating wheels with suitable gear position.
If NG, go to EC-273, "
Diagnostic Procedure" .
If OK, go to following step.
3. Select “DATA MONITOR” mode with CONSULT-II.
4. Warm engine up to normal operating temperature.
5. Maintain the following conditions for at least 60 consecutive sec-
onds.
6. If 1st trip DTC is detected, go to EC-273, "
Diagnostic Procedure" .
Overall Function CheckEBS010QN
Use this procedure to check the overall function of the vehicle speed signal circuit. During this check, a 1st trip
DTC might not be confirmed.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0500
0500Vehicle speed sensorThe almost 0 km/h (0 MPH) signal from
vehicle speed sensor is sent to ECM
even when vehicle is being driven.

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

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

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

Wheel sensor

Combination meter
ENG SPEED M/T: 2,000 - 6,000 rpm
A/T: 1,750 - 6,000 rpm
COOLAN TEMP/S More than 70°C (158°F)
B/FUEL SCHDL QR20DE 4.9 - 31.8 msec
QR25DEM/T: 5.0 - 31.8 msec
A/T: 6.0 - 31.8 msec
Selector lever Suitable position
PW/ST SIGNAL OFF
SEF196Y

DTC P0500 VSS
EC-273
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WITH GST
1. Lift up drive wheels.
2. Start engine.
3. Read vehicle speed signal in MODE 1 with GST.
The vehicle speed signal on GST should be able to exceed 10 km/h (6 MPH) when rotating wheels with
suitable gear position.
4. If NG, go to EC-273, "
Diagnostic Procedure" .
Diagnostic ProcedureEBS010QO
1. CHECK DTC WITH “ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)” (WITHOUT ESP
MODELS) OR “ESP/TCS/ABS CONTROL UNIT” (WITH ESP MODELS)
Refer to BRC-11, "
TROUBLE DIAGNOSIS" (Without ESP models) or BRC-58, "TROUBLE DIAGNOSIS"
(With ESP models).
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-346
[QR (WITH EURO-OBD)]
DTC P1211 TCS CONTROL UNIT

DTC P1211 TCS CONTROL UNITPFP:47850
DescriptionEBS010T1
The malfunction information related to TCS is transferred through the CAN communication line from ESP/
TCS/ABS control unit to ECM.
Be sure to erase the malfunction information such as DTC not only for ESP/TCS/ABS control unit but
also for ECM after TCS related repair.
On Board Diagnosis LogicEBS010T2
Freeze frame data is not stored in the ECM for this self-diagnosis. The MI will not light up for this self-
diagnosis.
DTC Confirmation ProcedureEBS010T3
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10V at idle.
WITH CONSULT-II
1. Turn ignition switch ON.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Start engine and let it idle for at least 60 seconds.
4. If 1st trip DTC is detected, go to EC-346, "
Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
Diagnostic ProcedureEBS010T4
Go to BRC-58, "TROUBLE DIAGNOSIS" .
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1211
1211TCS control unitECM receives a malfunction information from
ESP/TCS/ABS control unit.

ESP/TCS/ABS control unit

TCS related parts
SEF058Y

DTC P1212 TCS COMMUNICATION LINE
EC-347
[QR (WITH EURO-OBD)]
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DTC P1212 TCS COMMUNICATION LINEPFP:47850
DescriptionEBS010T5
NOTE:
If DTC P1212 is displayed with DTC U1000 or U1001, first perform the trouble diagnosis for DTC U1000,
U1001. Refer to EC-132, "
DTC U1000, U1001 CAN COMMUNICATION LINE" .
This CAN communication line is used to control the smooth engine operation during the TCS operation. Pulse
signals are exchanged between ECM and ESP/TCS/ABS control unit.
Be sure to erase the malfunction information such as DTC not only for ESP/TCS/ABS control unit but
also for ECM after TCS related repair.
On Board Diagnosis LogicEBS010T6
Freeze frame data is not stored in the ECM for this self-diagnosis. The MI will not light up for this self-
diagnosis.
DTC Confirmation ProcedureEBS010T7
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10.5V at idle.
WITH CONSULT-II
1. Turn ignition switch ON.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Start engine and let it idle for at least 10 seconds.
4. If a 1st trip DTC is detected, go to EC-347, "
Diagnostic Proce-
dure" .
WITH GST
Follow the procedure “WITH CONSULT-II” above.
Diagnostic ProcedureEBS010T8
1. CHECK ESP/TCS/ABS CONTROL UNIT FUNCTION
Refer to BRC-58, "
TROUBLE DIAGNOSIS" .
>>INSPECTION END
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1212
1212TCS communication
lineECM can not receive the information
from ESP/TCS/ABS control unit continu-
ously.

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

ESP/TCS/ABS control unit

Dead (Weak) battery
SEF058Y