2003 NISSAN X-TRAIL fuel type

FUEL PUMP CIRCUIT
EC-443
[QR (WITH EURO-OBD)]
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FUEL PUMP CIRCUITPFP:17042
DescriptionEBS010VH
SYSTEM DESCRIPTION
*: ECM determines the start signal status by the signals of engine speed and battery voltage.
The ECM activates the fuel pump for several seconds after the ignition switch is turned ON to improve engine
startability. If the ECM receives a engine speed signal from the crankshaft position sensor (POS) and cam-
shaft position sensor (PHASE), it knows that the engine is rotating, and causes the pump to operate. If the
engine speed signal is not received when the ignition switch is ON, the engine stalls. The ECM stops pump
operation and prevents battery discharging, thereby improving safety. The ECM does not directly drive the fuel
pump. It controls the ON/OFF fuel pump relay, which in turn controls the fuel pump.
COMPONENT DESCRIPTION
A turbine type design fuel pump is used in the fuel tank.
CONSULT-II Reference Value in Data Monitor ModeEBS010VI
Specification data are reference values.
Sensor Input Signal to ECM ECM Function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed*
Fuel pump control Fuel pump relay
Battery Battery voltage*
Condition Fuel pump operation
Ignition switch is turned to ON. Operates for 1 second.
Engine running and crankingOperates.
When engine is stoppedStops in 1.5 seconds.
Except as shown aboveStops.
PBIB0513E
MONITOR ITEM CONDITION SPECIFICATION
FUEL PUMP RLY

For 1 second after turning ignition switch ON

Engine running or crankingON

Except above conditions OFF

EC-498
[QR (WITHOUT EURO-OBD)]
ENGINE CONTROL SYSTEM

MIXTURE RATIO SELF-LEARNING CONTROL
The mixture ratio feedback control system monitors the mixture ratio signal transmitted from heated oxygen
sensor 1. This feedback signal is then sent to the ECM. The ECM controls the basic mixture ratio as close to
the theoretical mixture ratio as possible. However, the basic mixture ratio is not necessarily controlled as orig-
inally designed. Both manufacturing differences (i.e., mass air flow sensor hot wire) and characteristic
changes during operation (i.e., injector clogging) directly affect mixture ratio.
Accordingly, the difference between the basic and theoretical mixture ratios is monitored in this system. This is
then computed in terms of “injection pulse duration” to automatically compensate for the difference between
the two ratios.
“Fuel trim” refers to the feedback compensation value compared against the basic injection duration. Fuel trim
includes short term fuel trim and long term fuel trim.
“Short term fuel trim” is the short-term fuel compensation used to maintain the mixture ratio at its theoretical
value. The signal from heated oxygen sensor 1 indicates whether the mixture ratio is RICH or LEAN compared
to the theoretical value. The signal then triggers a reduction in fuel volume if the mixture ratio is rich, and an
increase in fuel volume if it is lean.
“Long term fuel trim” is overall fuel compensation carried out long-term to compensate for continual deviation
of the short term fuel trim from the central value. Such deviation will occur due to individual engine differences,
wear over time and changes in the usage environment.
FUEL INJECTION TIMING
Two types of systems are used.
Sequential Multiport Fuel Injection System
Fuel is injected into each cylinder during each engine cycle according to the firing order. This system is used
when the engine is running.
Simultaneous Multiport Fuel Injection System
Fuel is injected simultaneously into all four cylinders twice each engine cycle. In other words, pulse signals of
the same width are simultaneously transmitted from the ECM.
The four injectors will then receive the signals two times for each engine cycle.
This system is used when the engine is being started and/or if the fail-safe system (CPU) is operating.
FUEL SHUT-OFF
Fuel to each cylinder is cut off during deceleration or operation of the engine at excessively high speeds.
SEF337W

FUEL PUMP CIRCUIT
EC-835
[QR (WITHOUT EURO-OBD)]
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FUEL PUMP CIRCUITPFP:17042
DescriptionEBS0114O
SYSTEM DESCRIPTION
*: ECM determines the start signal status by the signals of engine speed and battery voltage.
The ECM activates the fuel pump for several seconds after the ignition switch is turned ON to improve engine
startability. If the ECM receives a engine speed signal from the crankshaft position sensor (POS) and cam-
shaft position sensor (PHASE), it knows that the engine is rotating, and causes the pump to operate. If the
engine speed signal is not received when the ignition switch is ON, the engine stalls. The ECM stops pump
operation and prevents battery discharging, thereby improving safety. The ECM does not directly drive the fuel
pump. It controls the ON/OFF fuel pump relay, which in turn controls the fuel pump.
COMPONENT DESCRIPTION
A turbine type design fuel pump is used in the fuel tank.
CONSULT-II Reference Value in Data Monitor ModeEBS0114P
Specification data are reference values.
Sensor Input Signal to ECM ECM Function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed*
Fuel pump control Fuel pump relay
Battery Battery voltage*
Condition Fuel pump operation
Ignition switch is turned to ON. Operates for 1 second.
Engine running and crankingOperates.
When engine is stoppedStops in 1.5 seconds.
Except as shown aboveStops.
PBIB0513E
MONITOR ITEM CONDITION SPECIFICATION
FUEL PUMP RLY

For 1 second after turning ignition switch ON

Engine running or crankingON

Except above conditions OFF

EC-874
[YD (WITH EURO-OBD)]
INDEX FOR DTC

[YD (WITH EURO-OBD)]INDEX FOR DTCPFP:00024
Alphabetical IndexEBS0116O
Check if the vehicle is a model with Euro-OBD (E-OBD) system or not by the “Type approval number” on the
identification plate. Refer to GI-44, "
IDENTIFICATION PLATE" .
NOTE:
If DTC U1000 is displayed with other DTC, first perform the trouble diagnosis for DTC U1000. Refer to
EC-944, "
DTC U1000 CAN COMMUNICATION LINE" .
X: Applicable —: Not applicable
Items
(CONSULT-II screen terms) DTC*
1 *2
(CONSULT-II, GST )TripMI lighting
up Reference page
APP SEN 1/CIRCUIT P0122 1 —EC-987
APP SEN 1/CIRCUIT P0123 1 —EC-987
APP SEN 2/CIRCUIT P0222 1 —EC-1025
APP SEN 2/CIRCUIT P0223 1 —EC-1025
APP SENSOR P2135 1 —EC-1149
BARO SEN/CIRC P2228 3×EC-1167
BARO SEN/CIRC P2229 3×EC-1167
BATTERY VOLTAGE P0563 1 —EC-1087
CAN COMM CIRCUIT U1000 1 —EC-944
CKP SEN/CIRCUIT P0335 3×EC-1044
CKP SENSOR P0336 3×EC-1050
CMP SEN/CIRCUIT P0340 3×EC-1056
CMP SENSOR P0341 3×EC-1062
CMP/CKP RELATION P0016 3×EC-947
CYL1 INJECTOR P0201 3×EC-1005
CYL2 INJECTOR P0202 3×EC-1005
CYL3 INJECTOR P0203 3×EC-1005
CYL4 INJECTOR P0204 3×EC-1005
ECM P0605 3×EC-1089
ECM P0606 3×EC-1091
ECM RELAY P0686 1 —E C - 111 0
ECT SEN/CIRCUIT P0117 3×EC-981
ECT SEN/CIRCUIT P0118 3×EC-981
EGR SYSTEM P0401 3×EC-1073
EGR VALVE P0404 3×EC-1080
ENG OVER TEMP P0217 1×EC-1011
FRP RELIEF VALVE P1272 3×EC-1127
FRP SEN/CIRC P0192 3×EC-997
FRP SEN/CIRC P0193 3×EC-997
FUEL LEAK P0093 3×EC-959
FUEL PUMP P0089 3×EC-956
FUEL PUMP P1273 3×EC-1134
FUEL PUMP P1274 1×EC-1139
FUEL PUMP P1275 1×EC-1144
FUEL PUMP/CIRC P0628 3×EC-1093
FUEL PUMP/CIRC P0629 3×EC-1093

EC-876
[YD (WITH EURO-OBD)]
INDEX FOR DTC

DTC No. IndexEBS0116P
Check if the vehicle is a model with Euro-OBD (E-OBD) system or not by the “Type approval number” on the
identification plate. Refer to GI-44, "
IDENTIFICATION PLATE" .
NOTE:
If DTC U1000 is displayed with other DTC, first perform the trouble diagnosis for DTC U1000. Refer to
EC-944, "
DTC U1000 CAN COMMUNICATION LINE" .
X: Applicable —: Not applicable
DTC*
1 *2
(CONSULT-II, GST)Items
(CONSULT-II screen item) TripMI lighting
upReference page
U1000 CAN COMM CIRCUIT 1 —EC-944
P0000NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.—— —
P0016 CMP/CKP RELATION 3×EC-947
P0045 TC BOOST SOL/CIRC 3×EC-949
P0088 HIGH FUEL PRESS 3×EC-954
P0089 FUEL PUMP 3×EC-956
P0093 FUEL LEAK 3×EC-959
P0101 MAF SENSOR 3×EC-963
P0102 MAF SEN/CIRCUIT 3×EC-970
P0103 MAF SEN/CIRCUIT 3×EC-970
P0112 IAT SEN/CIRCUIT 3×EC-976
P0113 IAT SEN/CIRCUIT 3×EC-976
P0117 ECT SEN/CIRCUIT 3×EC-981
P0118 ECT SEN/CIRCUIT 3×EC-981
P0122 APP SEN 1/CIRCUIT 1 —EC-987
P0123 APP SEN 1/CIRCUIT 1 —EC-987
P0182 FUEL TEMP SEN/CIRC 3×EC-993
P0183 FUEL TEMP SEN/CIRC 3×EC-993
P0192 FRP SEN/CIRC 3×EC-997
P0193 FRP SEN/CIRC 3×EC-997
P0200 INJECTOR 3×EC-1003
P0201 CYL1 INJECTOR 3×EC-1005
P0202 CYL2 INJECTOR 3×EC-1005
P0203 CYL3 INJECTOR 3×EC-1005
P0204 CYL4 INJECTOR 3×EC-1005
P0217 ENG OVER TEMP 1×EC-1011
P0222 APP SEN 2/CIRCUIT 1 —EC-1025
P0223 APP SEN 2/CIRCUIT 1 —EC-1025
P0234 TC SYSTEM 1 —EC-1031
P0237 TC BOOST SEN/CIRC 3×EC-1038
P0238 TC BOOST SEN/CIRC 3×EC-1038
P0335 CKP SEN/CIRCUIT 3×EC-1044
P0336 CKP SENSOR 3×EC-1050
P0340 CMP SEN/CIRCUIT 3×EC-1056
P0341 CMP SENSOR 3×EC-1062
P0380 GLOW RELAY 3×EC-1069

EC-878
[YD (WITH EURO-OBD)]
PRECAUTIONS

PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EBS0116Q
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. Information necessary to service the system safely is included in the SRS and SB section of
this Service Manual.
WARNING:

To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.

Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.

Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
On Board Diagnostic (OBD) System of EngineEBS011T4
The ECM has an on board diagnostic system. It will light up the malfunction indicator (MI) to warn the driver of
a malfunction causing emission deterioration.
CAUTION:

Be sure to turn the ignition switch OFF and disconnect the battery ground cable before any repair
or inspection work. The open/short circuit of related switches, sensors, solenoid valves, etc. will
cause the MI to light up.

Be sure to connect and lock the connectors securely after work. A loose (unlocked) connector will
cause the MI to light up due to the open circuit. (Be sure the connector is free from water, grease,
dirt, bent terminals, etc.)

Certain systems and components, especially those related to OBD, may use a new style slide-
locking type harness connector. For description and how to disconnect, refer to PG-70, "
HAR-
NESS CONNECTOR" .

Be sure to route and secure the harnesses properly after work. The interference of the harness
with a bracket, etc. may cause the MI to light up due to the short circuit.

Be sure to connect rubber tubes properly after work. A misconnected or disconnected rubber tube
may cause the MI to light up due to the malfunction of the fuel system, etc.

Be sure to erase the unnecessary malfunction information (repairs completed) from the ECM
before returning the vehicle to the customer.
PrecautionsEBS0116R

Always use a 12 volt battery as power source.

Do not attempt to disconnect battery cables while engine is
running.

Before connecting or disconnecting the ECM harness con-
nector, turn ignition switch OFF and disconnect battery
ground cable. Failure to do so may damage the ECM
because battery voltage is applied to ECM even if ignition
switch is turned off.

Before removing parts, turn ignition switch OFF and then
disconnect battery ground cable.
SEF289H

ENGINE CONTROL SYSTEM
EC-885
[YD (WITH EURO-OBD)]
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System ChartEBS0116V
*1: The input signal is sent to the ECM through CAN communication line.
*2: The output signal is sent from the ECM through CAN communication line.
Fuel Injection Control SystemEBS0116W
SYSTEM DESCRIPTION
Three types of fuel injection control are provided to accommodate engine operating conditions; normal control,
idle control and start control. The ECM determines the appropriate fuel injection control. Under each control,
the amount of fuel injected is adjusted to improve engine performance.
Pulse signals are sent to fuel injectors according to the input signals to adjust the amount of fuel injected to
preset value.
START CONTROL
Input/Output Signal Chart
When the ECM receives a start signal from the ignition switch, the
ECM adapts the fuel injection system for the start control. The
amount of fuel injected at engine starting is a preset program value
in the ECM. The program is determined by the engine speed, engine
coolant temperature and fuel rail pressure.
For better startability under cool engine conditions, the lower the
coolant temperature becomes, the greater the amount of fuel
injected. The ECM ends the start control when the engine speed
reaches the specific value, and shifts the control to the normal or idle
control.
Input (Sensor) ECM Function Output (Actuator)

Accelerator pedal position sensor

Fuel rail pressure sensor

Fuel pump temperature sensor

Engine coolant temperature sensor

Mass air flow sensor

Intake air temperature sensor

Crankshaft position sensor

Camshaft position sensor

Turbocharger boost sensor

Vehicle speed sensor*1

ESP/TCS/ABS control unit*1

Ignition switch

Stop lamp switch

Air conditioner switch*1

Park/neutral position switch

Battery voltage

Fuel level switch

Power steering pressure switch Fuel injection control Fuel injector and Fuel pump
Fuel injection timing control Fuel injector and Fuel pump
Fuel cut control Fuel injector and Fuel pump
Glow control system
Glow relay and glow indicator lamp*
2
On board diagnostic system
Malfunction indicator (MI)*2
EGR volume control EGR volume control valve
Cooling fan control Cooling fan relay
Turbocharger boost controlTurbocharger boost control solenoid
valve
Fuel transport pump control Fuel transport pump relay
Air conditioning cut control Air conditioner relay
Sensor Input Signal to ECM ECM Function Actuator
Engine coolant temperature sensor Engine coolant temperature
Fuel injection
control (start
control)Fuel injector
Fuel pump Crankshaft position sensor Engine speed
Camshaft position sensor Piston position
Ignition switch Start signal
Fuel rail pressure sensor Fuel rail pressure
SEF648S

INDEX FOR DTC
EC-1205
[YD (WITHOUT EURO-OBD)]
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EC

[YD (WITHOUT EURO-OBD)]INDEX FOR DTCPFP:00024
Alphabetical IndexEBS011WP
Check if the vehicle is a model with Euro-OBD (E-OBD) system or not by the “Type approval number” on the
identification plate. Refer to GI-44, "
IDENTIFICATION PLATE" .
NOTE:
If DTC U1000 is displayed with other DTC, first perform the trouble diagnosis for DTC U1000. Refer to
EC-1268, "
DTC U1000 CAN COMMUNICATION LINE" .
X: Applicable —: Not applicable
Items
(CONSULT-II screen terms) DTC* MI lighting up Reference page
APP SEN 1/CIRCUIT P0122 —EC-1297
APP SEN 1/CIRCUIT P0123 —EC-1297
APP SEN 2/CIRCUIT P0222 —EC-1332
APP SEN 2/CIRCUIT P0223 —EC-1332
APP SENSOR P2135 —EC-1437
BARO SEN/CIRC P2228 —EC-1455
BARO SEN/CIRC P2229 —EC-1455
BATTERY VOLTAGE P0563 —EC-1376
CAN COMM CIRCUIT U1000 —EC-1268
CKP SEN/CIRCUIT P0335×EC-1351
CKP SENSOR P0336×EC-1357
CMP SEN/CIRCUIT P0340×EC-1363
CMP SENSOR P0341×EC-1369
CMP/CKP RELATION P0016 —EC-1271
CYL1 INJECTOR P0201 —EC-1314
CYL2 INJECTOR P0202 —EC-1314
CYL3 INJECTOR P0203 —EC-1314
CYL4 INJECTOR P0204 —EC-1314
ECM P0605×EC-1378
ECM P0606×EC-1380
ECM RELAY P0686 —EC-1399
ECT SEN/CIRCUIT P0117 —EC-1291
ECT SEN/CIRCUIT P0118 —EC-1291
ENG OVER TEMP P0217×EC-1320
FRP RELIEF VALVE P1272 —EC-1416
FRP SEN/CIRC P0192 —EC-1307
FRP SEN/CIRC P0193 —EC-1307
FUEL LEAK P0093×EC-1277
FUEL PUMP P0089 —EC-1275
FUEL PUMP P1273 —EC-1422
FUEL PUMP P1274×EC-1427
FUEL PUMP P1275×EC-1432
FUEL PUMP/CIRC P0628×EC-1382
FUEL PUMP/CIRC P0629×EC-1382
FUEL TEMP SEN/CIRC P0182 —EC-1303
FUEL TEMP SEN/CIRC P0183 —EC-1303