fuel type NISSAN X-TRAIL 2003 Electronic Repair Manual

PRECAUTIONS
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PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
ECS004Q0
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.
WA RN ING:
lTo 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.
lImproper 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.
lDo 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 harness connectors.
Precautions for On Board Diagnostic (EURO-OBD) System of A/T and Engine —
Euro-OBD —
ECS004Q1
The ECM has an on board diagnostic system. It will light up the malfunction indicator lamp (MIL) to warn the
driver of a malfunction causing emission deterioration.
CAUTION:
lBe sure to turn the ignition switch “OFF” and disconnect the negative battery terminal before any
repair or inspection work. The open/short circuit of related switches, sensors, solenoid valves,
etc. will cause the MIL to light up.
lBe sure to connect and lock the connectors securely after work. A loose (unlocked) connector will
cause the MIL to light up due to an open circuit. (Be sure the connector is free from water, grease,
dirt, bent terminals, etc.)
lBe sure to route and secure the harnesses properly after work. Interference of the harness with a
bracket, etc. may cause the MIL to light up due to a short circuit.
lBe sure to connect rubber tubes properly after work. A misconnected or disconnected rubber tube
may cause the MIL to light up due to a malfunction of the EGR system or fuel injection system, etc.
lBe sure to erase the unnecessary malfunction information (repairs completed) from the TCM and
ECM before returning the vehicle to the customer.
Precautions For Trouble DiagnosisECS004VN
CAN SYSTEM
lDo not apply voltage of 7.0V or higher to the measurement terminals.
lUse the tester with its open terminal voltage being 7.0V or less.
Precautions For Harness RepairECS004VO
CAN SYSTEM
lSolder the repaired parts, and wrap with tape. [Frays of twisted
line must be within 110 mm (4.33 in)]
PKIA0306E

DI-50
WARNING LAMPS
Electrical Components Inspection
EKS002HK
FUEL WARNING LAMP OPERATION CHECK
1. Turn ignition switch “OFF”.
2. Disconnect fuel level sensor unit harness connector B125.
3. Connect a resistor (80W) between fuel level sensor unit harness
connector terminal 1(G) and ground.
4. Turn ignition switch “ON”.
The fuel warning lamp should come on.
OIL PRESSURE SWITCH CHECK
Check the continuity between the terminals of oil pressure switch
and body ground.
DIODE CHECK
lCheck continuity using an ohmmeter.
lDiode is functioning properly if test results are as shown in the
figure at left.
lCheck diodes at the combination meter harness connector
instead of on the combination meter assembly. Refer toDI-40,
"Wiring Diagram—WARN—/LHDModels"orDI-45, "Wiring
Diagram—WARN—/RHDModels".
NOTE:
Specification may vary depending on the type of tester. Before
performing this inspection, be sure to refer to the instruction
manual for the tester to be used.
SKIA0993E
Oil pressure kPa (bar,
kg/cm2,psi)Continuity
Engine runningMore than 10 - 20 (0.10 -
0.20,0.1-0.2,1-3)No
Engine not runningLess than 10 - 20 (0.10 -
0.20,0.1-0.2,1-3)Ye s
MEL425F
SEL901F

EC-12
[QR (WITH EURO-OBD)]
INDEX FOR DTC
[QR (WITH EURO-OBD)]INDEX FOR DTCPFP:00024
Alphabetical IndexEBS00B0G
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 toGI-45, "
IDENTIFICATION PLATE".
NOTE:
If DTC U1000 is displayed with other DTC, first perform the trouble diagnosis for DTC U1000. Refer to
EC-114
.
Items
(CONSULT-II screen terms)DTC*1
Reference page
CONSULT-II
GST*2ECM*3
APP SEN/CIRCUIT P0121 0121EC-154
A/T 1ST GR FNCTN P0731 0731AT-151
A/T 2ND GR FNCTN P0732 0732AT-158
A/T 3RD GR FNCTN P0733 0733AT-165
A/T 4TH GR FNCTN P0734 0734AT-172
ATF TEMP SEN/CIRC P0710 0710AT-136
BRAKE SW/CIRCUIT P1805 1805EC-329
CAN COMM CIRCUIT*7 U1000 1000*6EC-114
CKP SEN/CIRCUIT P0335 0335EC-217
CMP SEN/CIRCUIT P0340 0340EC-223
CYL 1 MISFIRE P0301 0301EC-206
CYL 2 MISFIRE P0302 0302EC-206
CYL 3 MISFIRE P0303 0303EC-206
CYL 4 MISFIRE P0304 0304EC-206
ECM P0605 0605EC-249
ECM BACK UP/CIRC P1065 1065EC-256
ECT SEN/CIRCUIT*5 P0117 0117EC-141
ECT SEN/CIRCUIT*5 P0118 0118EC-141
ENG OVER TEMP P1217 1217EC-311
ENGINE SPEED SIG P0725 0725AT-147
E T C A C T R P 11 2 1 11 2 1EC-271
ETC FUNCTION/CIRC P1122 1122EC-273
ETC MOT RLY/CIRC P1123 1123EC-279
FUEL SYS-LEAN-B1 P0171 0171EC-194
FUEL SYS-RICH-B1 P0172 0172EC-200
HO2S1 (B1) P0132 0132EC-160
HO2S1 (B1) P0133 0133EC-166
HO2S1 (B1) P0134 0134EC-174
HO2S1 (B1) P1143 1143EC-284
HO2S1 (B1) P1144 1144EC-290
HO2S1 HTR (B1) P0031 0031EC-120
HO2S1 HTR (B1) P0032 0032EC-120
HO2S2 (B1) P0138 0138EC-181
HO2S2 (B1) P0139 0139EC-187
HO2S2 (B1) P1146 1146EC-296
HO2S2 (B1) P1147 1147EC-303

EC-14
[QR (WITH EURO-OBD)]
INDEX FOR DTC
DTC No. Index
EBS00B0H
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 toGI-45, "
IDENTIFICATION PLATE".
NOTE:
If DTC U1000 is displayed with other DTC, first perform the trouble diagnosis for DTC U1000. Refer to
EC-114
.
DTC*1
Items
(CONSULT-II screen terms)Reference page
CONSULT-II
GST*2ECM*3
No DTC Flashing*4NO DTC IS DETECTED.
FURTHER TESTING
MAYBEREQUIRED.EC-49
U1000 1000*6 CAN COMM CIRCUIT*7EC-114
P0000 0000NO DTC IS DETECTED.
FURTHER TESTING
MAYBEREQUIRED.—
P0011 0011 INT/V TIM CONT-B1EC-117
P0031 0031 HO2S1 HTR (B1)EC-120
P0032 0032 HO2S1 HTR (B1)EC-120
P0037 0037 HO2S2 HTR (B1)EC-125
P0038 0038 HO2S2 HTR (B1)EC-125
P0102 0102 MAF SEN/CIRCUIT*5EC-130
P0103 0103 MAF SEN/CIRCUIT*5EC-130
P 0 11 2 0 11 2 I AT S E N / C I R C U ITEC-136
P 0 11 3 0 11 3 I AT S E N / C I R C U ITEC-136
P0117 0117 ECT SEN/CIRCUIT*5EC-141
P0118 0118 ECT SEN/CIRCUIT*5EC-141
P0120 0120 THRTL POS SEN/CIRC*5EC-146
P0121 0121 APP SEN/CIRCUITEC-154
P0132 0132 HO2S1 (B1)EC-160
P0133 0133 HO2S1 (B1)EC-166
P0134 0134 HO2S1 (B1)EC-174
P0138 0138 HO2S2 (B1)EC-181
P0139 0139 HO2S2 (B1)EC-187
P0171 0171 FUEL SYS-LEAN-B1EC-194
P0172 0172 FUEL SYS-RICH-B1EC-200
P0300 0300 MULTI CYL MISFIREEC-206
P0301 0301 CYL 1 MISFIREEC-206
P0302 0302 CYL 2 MISFIREEC-206
P0303 0303 CYL 3 MISFIREEC-206
P0304 0304 CYL 4 MISFIREEC-206
P0327 0327 KNOCK SEN/CIRC-B1EC-212
P0328 0328 KNOCK SEN/CIRC-B1EC-212
P0335 0335 CKP SEN/CIRCUITEC-217
P0340 0340 CMP SEN/CIRCUITEC-223
P0420 0420 TW CATALYST SYS-B1EC-229
P0444 0444 PURG VOLUME CONT/VEC-233

EC-16
[QR (WITH EURO-OBD)]
PRECAUTIONS
PRECAUTIONS
PFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EBS00B0I
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.
WAR NIN G:
lTo 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.
lImproper 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.
lDo 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 harness connectors.
On Board Diagnostic (OBD) System of Engine and A/TEBS00B0J
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:
lBe sure to turn the ignition switch OFF and disconnect the negative battery terminal before any
repair or inspection work. The open/short circuit of related switches, sensors, solenoid valves,
etc. will cause the MI to light up.
lBe 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.)
lCertain 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 toPG-70, "
HAR-
NESS CONNECTOR".
lBe 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.
lBe 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 injection system, etc.
lBe sure to erase the unnecessary malfunction information (repairs completed) from the ECM and
TCM (Transmission control module) before returning the vehicle to the customer.
PrecautionEBS00B0K
lAlways use a 12 volt battery as power source.
lDo not attempt to disconnect battery cables while engine is
running.
lBefore connecting or disconnecting the ECM harness con-
nector, turn ignition switch OFF and disconnect negative
battery terminal. Failure to do so may damage the ECM
because battery voltage is applied to ECM even if ignition
switch is turned off.
lBefore removing parts, turn ignition switch OFF and then
disconnect battery ground cable.
SEF289H

EC-26
[QR (WITH 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 film) 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

DTC P0300 - P0304 MULTIPLE CYLINDER MISFIRE, NO. 1 - 4 CYLINDER MIS-
FIRE
EC-209
[QR (WITH EURO-OBD)]
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5.CHECK IGNITION SPARK
1. Disconnect ignition coil assembly from rocker cover.
2. Connect a known good spark plug to the ignition coil assembly.
3. Place end of spark plug against a suitable ground and crank engine.
4. Check for spark.
OK or NG
OK >> GO TO 6.
NG >> Check ignition coil, power transistor and their circuits.
Refer toEC-334, "
IGNITION SIGNAL".
6.CHECK SPARK PLUGS
Remove the spark plugs and check for fouling, etc.
OK or NG
OK >> GO TO 7.
NG >> Repair or replace spark plug(s) with standard type
one(s). For spark plug type, refer toMA-25, "
Checking
and Changing Spark Plugs".
7.CHECK COMPRESSION PRESSURE
Check compression pressure. Refer toEM-52, "
CHECKING COMPRESSION PRESSURE".
OK or NG
OK >> GO TO 8.
NG >> Check pistons, piston rings, valves, valve seats and cylinder head gaskets.
8.CHECK FUEL PRESSURE
1. Install all removed parts.
2. Release fuel pressure to zero. Refer toEC-34, "
FUEL PRESSURE RELEASE".
3. Install fuel pressure gauge and check fuel pressure. Refer toEC-34, "
FUEL PRESSURE CHECK".
OK or NG
OK >> GO TO 9.
NG >> Follow the construction of "FUEL PRESSURE CHECK".
SEF575Q
SEF156I
Standard:
1,190 kPa (11.9 bar, 12.1 kg/cm2, 172 psi)/250
rpm
Minimum:
990 kPa (9.9 bar, 10.1 kg/cm
2, 144 psi)/250 rpm
Difference between each
cylinder:98 kPa (0.98 bar, 1.0 kg/cm
2, 14 psi)/250 rpm
At idle: Approx. 350 kPa (3.5 bar, 3.7 kg/cm
2,51psi)

EC-352
[QR (WITH EURO-OBD)]
FUEL PUMP CIRCUIT
FUEL PUMP CIRCUIT
PFP:17042
DescriptionEBS00BDL
SYSTEM DESCRIPTION
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 180°signal from the camshaft position sensor (PHASE), it knows that the
engine is rotating, and causes the pump to operate. If the 180°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 ModeEBS00BDM
Specification data are reference values.
ECM Terminals and Reference ValueEBS00BDN
Specification data are reference values and are measured between each terminal and body ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
Sensor Input Signal to ECMECM
FunctionActuator
Crankshaft position sensor (POS) Engine speed
Fuel pump
controlFuel pump relay Camshaft position sensor (PHASE) Engine speed and cylinder number
Ignition switch Start signal
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
lFor 1 seconds after turning ignition switch ON
lEngine running or crankingON
lExcept above conditions OFF

PRECAUTIONS
EC-381
[QR (WITHOUT EURO-OBD)]
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EC
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EBS00BEL
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.
WA RN ING:
lTo 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.
lImproper 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.
lDo 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 harness connector.
On Board Diagnostic (OBD) System of Engine and A/TEBS00BEM
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:
lBe sure to turn the ignition switch OFF and disconnect the negative battery terminal before any
repair or inspection work. The open/short circuit of related switches, sensors, solenoid valves,
etc. will cause the MI to light up.
lBe 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.)
lCertain 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 toPG-70, "
HAR-
NESS CONNECTOR".
lBe 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.
lBe 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 injection system, etc.
lBe sure to erase the unnecessary malfunction information (repairs completed) from the ECM and
TCM (Transmission control module) before returning the vehicle to the customer.
PrecautionEBS00BEN
lAlways use a 12 volt battery as power source.
lDo not attempt to disconnect battery cables while engine is
running.
lBefore connecting or disconnecting the ECM harness con-
nector, turn ignition switch OFF and disconnect negative
battery terminal. Failure to do so may damage the ECM
because battery voltage is applied to ECM even if ignition
switch is turned off.
lBefore removing parts, turn ignition switch OFF and then
disconnect battery ground cable.
SEF289H

ENGINE CONTROL SYSTEM
EC-391
[QR (WITHOUT EURO-OBD)]
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MA
EC
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 film) 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