2005 NISSAN X-TRAIL wiring

EC-17
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ECA
1570
On Board Diagnosis Logic ..................................1570
DTC Confirmation Procedure ..............................1570
Wiring Diagram ...................................................1571
Diagnostic Procedure ..........................................1573
Component Inspection ........................................1574
Removal and Installation .....................................1574
DTC P0642, P0643 SENSOR POWER SUPPLY ..1575
On Board Diagnosis Logic ..................................1575
DTC Confirmation Procedure ..............................1575
Wiring Diagram ...................................................1576
Diagnostic Procedure ..........................................1577
DTC P0652, P0653 SENSOR POWER SUPPLY ..1579
On Board Diagnosis Logic ..................................1579
DTC Confirmation Procedure ..............................1579
Wiring Diagram ...................................................1580
Diagnostic Procedure ..........................................1581
DTC P0686 ECM RELAY .......................................1584
On Board Diagnosis Logic ..................................1584
DTC Confirmation Procedure ..............................1584
Wiring Diagram ...................................................1585
Diagnostic Procedure ..........................................1586
Component Inspection ........................................1587
DTC P1211 TCS CONTROL UNIT ........................1588
Description ..........................................................1588
On Board Diagnosis Logic ..................................1588
DTC Confirmation Procedure ..............................1588
Diagnostic Procedure ..........................................1588
DTC P1212 TCS COMMUNICATION LINE ...........1589
Description ..........................................................1589
On Board Diagnosis Logic ..................................1589
DTC Confirmation Procedure ..............................1589
Diagnostic Procedure ..........................................1589
DTC P1260 - P1267 FUEL INJECTOR ADJUST-
MENT RESISTOR ..................................................1590
Description ..........................................................1590
On Board Diagnosis Logic ..................................1590
DTC Confirmation Procedure ..............................1591
Wiring Diagram ...................................................1592
Diagnostic Procedure ..........................................1593
Component Inspection ........................................1594
Removal and Installation .....................................1595
DTC P1268 - P1271 FUEL INJECTOR .................1596
Component Description .......................................1596
CONSULT-II Reference Value in Data Monitor Mode
1596
On Board Diagnosis Logic ..................................1596
DTC Confirmation Procedure ..............................1597
Wiring Diagram ...................................................1598
Diagnostic Procedure ..........................................1600
Component Inspection ........................................1601
Removal and Installation .....................................1601
DTC P1272 FUEL PUMP .......................................1602
Description ..........................................................1602
CONSULT-II Reference Value in Data Monitor Mode
1602
On Board Diagnosis Logic ..................................1602
DTC Confirmation Procedure ..............................1602
Wiring Diagram ...................................................1604Diagnostic Procedure ..........................................1605
Component Inspection .........................................1607
Removal and Installation .....................................1607
DTC P1273 FUEL PUMP .......................................1609
Description ...........................................................1609
CONSULT-II Reference Value in Data Monitor Mode
1609
On Board Diagnosis Logic ...................................1609
DTC Confirmation Procedure ..............................1609
Wiring Diagram ....................................................1610
Diagnostic Procedure ..........................................1611
Component Inspection .........................................1613
Removal and Installation .....................................1613
DTC P1274 FUEL PUMP .......................................1614
Description ...........................................................1614
CONSULT-II Reference Value in Data Monitor Mode
1614
On Board Diagnosis Logic ...................................1614
DTC Confirmation Procedure ..............................1614
Wiring Diagram ....................................................1615
Diagnostic Procedure ..........................................1617
Component Inspection .........................................1618
Removal and Installation .....................................1618
DTC P1275 FUEL PUMP .......................................1619
Description ...........................................................1619
CONSULT-II Reference Value in Data Monitor Mode
1619
On Board Diagnosis Logic ...................................1619
DTC Confirmation Procedure ..............................1619
Wiring Diagram ....................................................1620
Diagnostic Procedure ..........................................1622
Component Inspection .........................................1623
Removal and Installation .....................................1623
DTC P2135 APP SENSOR ....................................1624
Description ...........................................................1624
CONSULT-II Reference Value in Data Monitor Mode
1624
On Board Diagnosis Logic ...................................1624
DTC Confirmation Procedure ..............................1624
Wiring Diagram ....................................................1626
Diagnostic Procedure ..........................................1628
Component Inspection .........................................1630
Removal and Installation .....................................1630
DTC P2146, P2149 FUEL INJECTOR POWER SUP-
PLY .........................................................................1631
Component Description .......................................1631
CONSULT-II Reference Value in Data Monitor Mode
1631
On Board Diagnosis Logic ...................................1631
DTC Confirmation Procedure ..............................1631
Wiring Diagram ....................................................1632
Diagnostic Procedure ..........................................1634
DTC P2147, P2148 FUEL INJECTOR CIRCUIT ...1635
Component Description .......................................1635
CONSULT-II Reference Value in Data Monitor Mode
1635
On Board Diagnosis Logic ...................................1635
DTC Confirmation Procedure ..............................1635
Wiring Diagram ....................................................1636

EC-18 Diagnostic Procedure ..........................................1638
Component Inspection .........................................1640
Removal and Installation .....................................1640
DTC P2228, P2229 BARO SENSOR .....................1641
Description ...........................................................1641
On Board Diagnosis Logic ...................................1641
DTC Confirmation Procedure ..............................1641
Diagnostic Procedure ..........................................1642
GLOW CONTROL SYSTEM ..................................1643
Description ...........................................................1643
Wiring Diagram ....................................................1644
Diagnostic Procedure ..........................................1646
Component Inspection .........................................1650
Removal and Installation .....................................1650
EGR VOLUME CONTROL SYSTEM .....................1651
Description ...........................................................1651
CONSULT-II Reference Value in Data Monitor Mode
1652
Wiring Diagram ....................................................1653
Diagnostic Procedure ..........................................1655
Component Inspection .........................................1656
Removal and Installation .....................................1658
TC BOOST CONTROL SOLENOID VALVE ..........1659
Description ...........................................................1659
Wiring Diagram ....................................................1660
Diagnostic Procedure ..........................................1661
Component Inspection .........................................1663
Removal and Installation .....................................1663
BRAKE SWITCH ....................................................1664
Description ...........................................................1664
CONSULT-II Reference Value in Data Monitor Mode
1664
Wiring Diagram ....................................................1665
Diagnostic Procedure ..........................................1667
Component Inspection .........................................1671
PNP SWITCH .........................................................1673
Description ...........................................................1673
CONSULT-II Reference Value in Data Monitor Mode
1673Wiring Diagram ....................................................1674
Diagnostic Procedure ...........................................1675
PSP SWITCH ..........................................................1677
Component Description .......................................1677
CONSULT-II Reference Value in Data Monitor Mode
1677
Wiring Diagram ....................................................1678
Diagnostic Procedure ...........................................1679
Component Inspection .........................................1680
Removal and Installation ......................................1681
FUEL TRANSPORT PUMP ....................................1682
Description ...........................................................1682
Wiring Diagram ....................................................1683
Diagnostic Procedure ...........................................1685
Component Inspection .........................................1689
Removal and Installation ......................................1689
AUTOMATIC SPEED CONTROL DEVICE (ASCD) 1690
System Description ..............................................1690
Component Description .......................................1691
ASCD INDICATOR .................................................1692
Component Description .......................................1692
Wiring Diagram—LHD Models .............................1693
Wiring Diagram—RHD Models ............................1694
Diagnostic Procedure ...........................................1695
START SIGNAL ......................................................1696
Wiring Diagram ....................................................1696
Diagnostic Procedure ...........................................1697
MI & DATA LINK CONNECTORS ..........................1699
Wiring Diagram ....................................................1699
SERVICE DATA AND SPECIFICATIONS (SDS) ...1701
General Specifications .........................................1701
Mass Air Flow Sensor ..........................................1701
Engine Coolant Temperature Sensor ...................1701
Fuel Rail Pressure Sensor ...................................1701
Glow Plug .............................................................1701
EGR Volume Control Valve ..................................1701
Crankshaft Position Sensor .................................1701
Camshaft Position Sensor ...................................1701

EC-24
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PRECAUTIONS

PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EBS010L0
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 Engine and A/TEBS010L1
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-74, "
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 injection system, etc.

Be sure to erase the unnecessary malfunction information (repairs completed) from the ECM and
TCM (Transmission control module) before returning the vehicle to the customer.
PrecautionEBS010L2

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.
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PRECAUTIONS
EC-27
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EC


Do not depress accelerator pedal when starting.

Immediately after starting, do not rev up engine unneces-
sarily.

Do not rev up engine just prior to shutdown.

When installing C.B. ham radio or a mobile phone, be sure
to observe the following as it may adversely affect elec-
tronic control systems depending on installation location.
–Keep the antenna as far as possible from the electronic
control units.
–Keep the antenna feeder line more than 20 cm (8 in) away
from the harness of electronic controls.
Do not let them run parallel for a long distance.
–Adjust the antenna and feeder line so that the standing-
wave radio can be kept smaller.
–Be sure to ground the radio to vehicle body.
Wiring Diagrams and Trouble DiagnosisEBS010L3
When you read wiring diagrams, refer to the following:

GI-14, "How to Read Wiring Diagrams"

PG-2, "POWER SUPPLY ROUTING" for power distribution circuit
When you perform trouble diagnosis, refer to the following:

GI-10, "HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES"

GI-23, "How to Perform Efficient Diagnosis for an Electrical Incident"
SEF709Y
SEF708Y

ENGINE CONTROL SYSTEM
EC-39
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CAN Communication UnitEBS010LD
SYSTEM DESCRIPTION
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
CAN COMMUNICATION UNIT
TYPE 2
System Diagram
Input/output Signal Chart
T: Transmit R: Receive Body type Wagon
Axle 4WD 2WD
Transmission M/T A/T M/T A/T M/T
Brake control ABS ESP ABS
CAN system type 2 3 5 6 7
ECM×××××
TCM××
ESP/TCS/ABS control unit××
ABS actuator and electric unit (con-
trol unit)×× ×
Steering angle sensor××
4WD control unit××××
Combination meter×××××
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

TROUBLE DIAGNOSIS
EC-73
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TROUBLE DIAGNOSISPFP:00004
Trouble Diagnosis IntroductionEBS010LP
INTRODUCTION
The engine has an ECM to control major systems such as fuel con-
trol, ignition control, idle air control system, etc. The ECM accepts
input signals from sensors and instantly drives actuators. It is essen-
tial that both input and output signals are proper and stable. At the
same time, it is important that there are no malfunctions such as vac-
uum leaks, fouled spark plugs, or other malfunctions with the engine.
It is much more difficult to diagnose an incident that occurs intermit-
tently rather than continuously. Most intermittent incidents are
caused by poor electric connections or improper wiring. In this case,
careful checking of suspected circuits may help prevent the replace-
ment of good parts.
A visual check only may not find the cause of the incidents. A road
test with CONSULT-II (or GST) or a circuit tester connected should
be performed. Follow EC-74, "
WORK FLOW" .
Before undertaking actual checks, take a few minutes to talk with a
customer who approaches with a driveability complaint. The cus-
tomer can supply good information about such incidents, especially
intermittent ones. Find out what symptoms are present and under
what conditions they occur. A Diagnostic Worksheet like the example
on EC-76, "
Worksheet Sample" should be used.
Start your diagnosis by looking for conventional malfunctions first.
This will help troubleshoot driveability malfunctions on an electroni-
cally controlled engine vehicle.
MEF036D
SEF233G
SEF234G

TROUBLE DIAGNOSIS
EC-75
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Description for Work Flow
STEP DESCRIPTION
STEP IGet detailed information about the conditions and the environment when the incident/symptom occurred using EC-76,
"DIAGNOSTIC WORKSHEET" .
STEP IIBefore confirming the concern, check and write down (print out using CONSULT-II or GST) the (1st trip) DTC and the
(1st trip) freeze frame data, then erase the DTC and the data. (Refer to EC-63, "
HOW TO ERASE EMISSION-
RELATED DIAGNOSTIC INFORMATION" .) The (1st trip) DTC and the (1st trip) freeze frame data can be used when
duplicating the incident at STEP III & IV.
If the incident cannot be verified, perform EC-124, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
Study the relationship between the cause, specified by (1st trip) DTC, and the symptom described by the customer.
(The Symptom Matrix Chart will be useful. See EC-84, "
Symptom Matrix Chart" .)
Also check related service bulletins for information.
STEP IIITry to confirm the symptom and under what conditions the incident occurs.
The DIAGNOSTIC WORK SHEET and the freeze frame data are useful to verify the incident. Connect CONSULT-II
to the vehicle in “DATA MONITOR (AUTO TRIG)” mode and check real time diagnosis results.
If the incident cannot be verified, perform EC-124, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
If the malfunction code is detected, skip STEP IV and perform STEP V.
STEP IVTry to detect the (1st trip) DTC by driving in (or performing) the DTC Confirmation Procedure. Check and read the (1st
trip) DTC and (1st trip) freeze frame data by using CONSULT-II or GST.
During the (1st trip) DTC verification, be sure to connect CONSULT-II to the vehicle in “DATA MONITOR (AUTO
TRIG)” mode and check real time diagnosis results.
If the incident cannot be verified, perform EC-124, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
In case the DTC Confirmation Procedure is not available, perform the Overall Function Check instead. The (1st trip)
DTC cannot be displayed by this check, however, this simplified check is an effective alternative.
The NG result of the Overall Function Check is the same as the (1st trip) DTC detection.
STEP VTake the appropriate action based on the results of STEP I through IV.
If the malfunction code is indicated, proceed to TROUBLE DIAGNOSIS FOR DTC PXXXX.
If the normal code is indicated, proceed to the BASIC INSPECTION. (Refer to EC-79, "
Basic Inspection" .)Then per-
form inspections according to the Symptom Matrix Chart. (Refer to EC-84, "
Symptom Matrix Chart" .)
STEP VIIdentify where to begin diagnosis based on the relationship study between symptom and possible causes. Inspect the
system for mechanical binding, loose connectors or wiring damage using (tracing) Harness Layouts.
Gently shake the related connectors, components or wiring harness with CONSULT-II set in “DATA MONITOR
(AUTO TRIG)” mode.
Check the voltage of the related ECM terminals or monitor the output data from the related sensors with CONSULT-II.
Refer to EC-95, "
ECM Terminals and Reference Value" , EC-115, "CONSULT-II Reference Value in Data Monitor
Mode" .
The Diagnostic Procedure in EC section contains a description based on open circuit inspection. A short circuit
inspection is also required for the circuit check in the Diagnostic Procedure. For details, refer to Circuit Inspection in
GI-23, "
How to Perform Efficient Diagnosis for an Electrical Incident" .
Repair or replace the malfunction parts.
If malfunctioning part cannot be detected, perform EC-124, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-
DENT" .
STEP VIIOnce you have repaired the circuit or replaced a component, you need to run the engine in the same conditions and
circumstances which resulted in the customer's initial complaint.
Perform the DTC Confirmation Procedure and confirm the normal code [DTC No. P0000] is detected. If the incident is
still detected in the final check, perform STEP VI by using a method different from the previous one.
Before returning the vehicle to the customer, be sure to erase the unnecessary (already fixed) (1st trip) DTC in ECM
and TCM (Transmission control module). (Refer to EC-63, "
HOW TO ERASE EMISSION-RELATED DIAGNOSTIC
INFORMATION" and AT-42, "HOW TO ERASE DTC" .)

TROUBLE DIAGNOSIS
EC-79
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Basic InspectionEBS010LS
1. INSPECTION START
1. Check service records for any recent repairs that may indicate a related malfunction, or a current need for
scheduled maintenance.
2. Open engine hood and check the following:
–Harness connectors for improper connections
–Wiring harness for improper connections, pinches and cut
–Vacuum hoses for splits, kinks and improper connections
–Hoses and ducts for leaks
–Air cleaner clogging
–Gasket
3. Confirm that electrical or mechanical loads are not applied.
–Headlamp switch is OFF.
–Air conditioner switch is OFF.
–Rear window defogger switch is OFF.
–Steering wheel is in the straight-ahead position, etc.
4. Start engine and warm it up until engine coolant temperature
indicator points the middle of gauge.
Ensure engine stays below 1,000 rpm.
5. Run engine at about 2,000 rpm for about 2 minutes under no
load.
6. Make sure that no DTC is displayed with CONSULT-II or GST.
OK or NG
OK >> GO TO 3.
NG >> GO TO 2.
2. REPAIR OR REPLACE
Repair or replace components as necessary according to corresponding Diagnostic Procedure.
>> GO TO 3
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SEF977U