service indicator NISSAN X-TRAIL 2005 Service User Guide

EC-10 CONSULT-II Reference Value in Data Monitor Mode
.946
Wiring Diagram .....................................................947
Diagnostic Procedure ...........................................948
Component Inspection ..........................................953
ASCD INDICATOR ..................................................954
Component Description ........................................954
CONSULT-II Reference Value in Data Monitor Mode
.954
Wiring Diagram .....................................................955
Diagnostic Procedure ...........................................957
MI & DATA LINK CONNECTORS ...........................958
Wiring Diagram .....................................................958
EVAPORATIVE EMISSION SYSTEM .....................962
Description ............................................................962
Component Inspection ..........................................965
POSITIVE CRANKCASE VENTILATION ...............967
Description ............................................................967
Component Inspection ..........................................967
AUTOMATIC SPEED CONTROL DEVICE (ASCD) .969
System Description ...............................................969
Component Description ........................................970
SERVICE DATA AND SPECIFICATIONS (SDS) ....971
Fuel Pressure .......................................................971
Idle Speed and Ignition Timing .............................971
Mass Air Flow Sensor ...........................................971
Intake Air Temperature Sensor .............................971
Engine Coolant Temperature Sensor ...................971
Heated Oxygen Sensor 1 Heater .........................971
Heated Oxygen sensor 2 Heater ..........................971
Crankshaft Position Sensor (POS) .......................971
Camshaft Position Sensor (PHASE) ....................972
Throttle Control Motor ...........................................972
Injector ..................................................................972
Fuel Pump ............................................................972
YD (WITH EURO-OBD)
INDEX FOR DTC .....................................................973
Alphabetical Index ................................................973
DTC No. Index ......................................................976
PRECAUTIONS .......................................................979
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ...............................................................979
On Board Diagnostic (OBD) System of Engine ....979
Precautions ...........................................................979
Wiring Diagrams and Trouble Diagnosis ..............982
PREPARATION .......................................................983
Special Service Tools ...........................................983
Commercial Service Tools ....................................983
ENGINE CONTROL SYSTEM ................................984
System Diagram ...................................................984
Vacuum Hose Drawing .........................................985
System Chart ........................................................986
Fuel Injection Control System ...............................986
Fuel Injection Timing Control System ...................988
Air Conditioning Cut Control .................................988
Fuel Cut Control (At No Load & High Engine Speed) .988Crankcase Ventilation System ..............................989
CAN Communication ............................................989
BASIC SERVICE PROCEDURE .............................994
Fuel Filter ..............................................................994
Fuel Pump Learning Value Clearing .....................994
ON BOARD DIAGNOSTIC (OBD) SYSTEM ...........996
Introduction ...........................................................996
Three Trip Detection Logic and One Trip Detection
Logic .....................................................................996
Emission-related Diagnostic Information ..............996
NATS (Nissan Anti-theft System) .........................1001
Malfunction Indicator (MI) ....................................1001
OBD System Operation Chart ..............................1004
TROUBLE DIAGNOSIS .........................................1007
Trouble Diagnosis Introduction ............................1007
DTC Inspection Priority Chart ..............................1010
Basic Inspection ...................................................1012
Symptom Matrix Chart .........................................1016
Engine Control Component Parts Location ..........1020
Circuit Diagram ....................................................1025
ECM Harness Connector Terminal Layout ...........1027
ECM Terminals And Reference Value ..................1027
CONSULT-II Function (ENGINE) .........................1034
Generic Scan Tool (GST) Function ......................1040
CONSULT-II Reference Value in Data Monitor Mode
1042
Major Sensor Reference Graph in Data Monitor
Mode ....................................................................1043
TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-
DENT ......................................................................1045
Description ...........................................................1045
Diagnostic Procedure ...........................................1045
POWER SUPPLY AND GROUND CIRCUIT ..........1046
Wiring Diagram ....................................................1046
Diagnostic Procedure ...........................................1047
Component Inspection .........................................1054
Ground Inspection ................................................1055
DTC U1000 CAN COMMUNICATION LINE ...........1056
Description ...........................................................1056
On Board Diagnosis Logic ...................................1056
DTC Confirmation Procedure ...............................1056
Wiring Diagram ....................................................1057
Diagnostic Procedure ...........................................1058
DTC P0016 CKP - CMP CORRELATION ..............1059
On Board Diagnosis Logic ...................................1059
DTC Confirmation Procedure ...............................1059
Diagnostic Procedure ...........................................1059
DTC P0045 TC BOOST CONTROL SOLENOID
VALVE .....................................................................1061
Description ...........................................................1061
On Board Diagnosis Logic ...................................1061
DTC Confirmation Procedure ...............................1061
Wiring Diagram ....................................................1062
Diagnostic Procedure ...........................................1063
Component Inspection .........................................1064
DTC P0088 FUEL SYSTEM ...................................1066
On Board Diagnosis Logic ...................................1066
DTC Confirmation Procedure ...............................1066

EC-14 Wiring Diagram ....................................................1294
Diagnostic Procedure ..........................................1296
DTC P2147, P2148 FUEL INJECTOR CIRCUIT ...1297
Component Description .......................................1297
CONSULT-II Reference Value in Data Monitor Mode
1297
On Board Diagnosis Logic ...................................1297
DTC Confirmation Procedure ..............................1297
Wiring Diagram ....................................................1298
Diagnostic Procedure ..........................................1300
Component Inspection .........................................1301
Removal and Installation .....................................1302
DTC P2228, P2229 BARO SENSOR .....................1303
Description ...........................................................1303
On Board Diagnosis Logic ...................................1303
DTC Confirmation Procedure ..............................1303
Diagnostic Procedure ..........................................1304
GLOW CONTROL SYSTEM ..................................1305
Description ...........................................................1305
Wiring Diagram ....................................................1306
Diagnostic Procedure ..........................................1308
Component Inspection .........................................1312
Removal and Installation .....................................1312
BRAKE SWITCH ....................................................1313
Description ...........................................................1313
CONSULT-II Reference Value in Data Monitor Mode
1313
Wiring Diagram ....................................................1314
Diagnostic Procedure ..........................................1316
Component Inspection .........................................1320
PNP SWITCH .........................................................1322
Description ...........................................................1322
CONSULT-II Reference Value in Data Monitor Mode
1322
Wiring Diagram ....................................................1323
Diagnostic Procedure ..........................................1324
PSP SWITCH .........................................................1326
Component Description .......................................1326
CONSULT-II Reference Value in Data Monitor Mode
1326
Wiring Diagram ....................................................1327
Diagnostic Procedure ..........................................1328
Component Inspection .........................................1329
Removal and Installation .....................................1330
FUEL TRANSPORT PUMP ....................................1331
Description ...........................................................1331
Wiring Diagram ....................................................1332
Diagnostic Procedure ..........................................1334
Component Inspection .........................................1338
Removal and Installation .....................................1338
AUTOMATIC SPEED CONTROL DEVICE (ASCD) 1339
System Description ..............................................1339
Component Description .......................................1340
ASCD INDICATOR .................................................1341
Component Description .......................................1341
Wiring Diagram—LHD Models .............................1342
Wiring Diagram—RHD Models ............................1343
Diagnostic Procedure ..........................................1344START SIGNAL ......................................................1345
Wiring Diagram ....................................................1345
Diagnostic Procedure ...........................................1346
MI & DATA LINK CONNECTORS ..........................1348
Wiring Diagram ....................................................1348
SERVICE DATA AND SPECIFICATIONS (SDS) ...1350
General Specifications .........................................1350
Mass Air Flow Sensor ..........................................1350
Engine Coolant Temperature Sensor ...................1350
Fuel Rail Pressure Sensor ...................................1350
Glow Plug .............................................................1350
EGR Volume Control Valve ..................................1350
Crankshaft Position Sensor .................................1350
Camshaft Position Sensor ...................................1350
YD (WITHOUT EURO-OBD)
INDEX FOR DTC ....................................................1351
Alphabetical Index ................................................1351
DTC No. Index .....................................................1353
PRECAUTIONS ......................................................1355
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ..............................................................1355
On Board Diagnostic (OBD) System of Engine ...1355
Precautions ..........................................................1355
Wiring Diagrams and Trouble Diagnosis ..............1358
PREPARATION ......................................................1359
Special Service Tools ...........................................1359
Commercial Service Tools ...................................1359
ENGINE CONTROL SYSTEM ................................1360
System Diagram ..................................................1360
Vacuum Hose Drawing ........................................1361
System Chart .......................................................1362
Fuel Injection Control System ..............................1362
Fuel Injection Timing Control System ..................1364
Air Conditioning Cut Control ................................1364
Fuel Cut Control (At No Load & High Engine Speed) 1364
Crankcase Ventilation System .............................1365
CAN Communication ...........................................1365
BASIC SERVICE PROCEDURE ............................1370
Fuel Filter .............................................................1370
Fuel Pump Learning Value Clearing ....................1370
ON BOARD DIAGNOSTIC (OBD) SYSTEM ..........1372
DTC and MI Detection Logic ................................1372
Diagnostic Trouble Code (DTC) ...........................1372
Freeze Frame Data ..............................................1373
NATS (Nissan Anti-theft System) .........................1373
Malfunction Indicator (MI) ....................................1373
Relationship Between MI, DTC, CONSULT-II and
Driving Patterns ...................................................1376
TROUBLE DIAGNOSIS .........................................1378
Trouble Diagnosis Introduction ............................1378
DTC Inspection Priority Chart ..............................1381
Basic Inspection ...................................................1382
Symptom Matrix Chart .........................................1387
Engine Control Component Parts Location ..........1391
Circuit Diagram ....................................................1396
ECM Harness Connector Terminal Layout ...........1398

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
[QR (WITH EURO-OBD)]
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.
SEF289H

EC-52
[QR (WITH EURO-OBD)]
ON BOARD DIAGNOSTIC (OBD) SYSTEM

ON BOARD DIAGNOSTIC (OBD) SYSTEMPFP:00028
IntroductionEBS01FF0
The ECM has an on board diagnostic system, which detects malfunctions related to engine sensors or actua-
tors. The ECM also records various emission-related diagnostic information including:
The above information can be checked using procedures listed in the table below.
×: Applicable —: Not applicable
*: When DTC and 1st trip DTC simultaneously appear on the display, they cannot be clearly distinguished from each other.
The malfunction indicator (MI) on the instrument panel lights up when the same malfunction is detected in two
consecutive trips (Two trip detection logic), or when the ECM enters fail-safe mode. (Refer to EC-78, "
Fail-
Safe Chart" .)
Two Trip Detection LogicEBS010LK
When a malfunction is detected for the first time, 1st trip DTC and 1st trip Freeze Frame data are stored in the
ECM memory. The MI will not light up at this stage. <1st trip>
If the same malfunction is detected again during the next drive, the DTC and Freeze Frame data are stored in
the ECM memory, and the MI lights up. The MI lights up at the same time when the DTC is stored. <2nd trip>
The “trip” in the “Two Trip Detection Logic” means a driving mode in which self-diagnosis is performed during
vehicle operation. Specific on board diagnostic items will cause the ECM to light up or blink the MI, and store
DTC and Freeze Frame data, even in the 1st trip, as shown below.
×: Applicable —: Not applicable
When there is an open circuit on MI circuit, the ECM can not warn the driver by lighting up MI when there is
trouble on engine control system.
Therefore, when electrical controlled throttle and part of ECM related diagnoses are continuously detected as
NG for 5 trips, ECM warns the driver that engine control system has trouble and MI circuit is open by means of
operating fail-safe function.
Emission-related diagnostic information ISO Standard
Diagnostic Trouble Code (DTC) Service $03 of ISO 15031-5
Freeze Frame data Service $02 of ISO 15031-5
System Readiness Test (SRT) code Service $01 of ISO 15031-5
1st Trip Diagnostic Trouble Code (1st Trip DTC) Service $07 of ISO 15031-5
1st Trip Freeze Frame data
Test values and Test limits Service $06 of ISO 15031-5
Calibration ID Service $09 of ISO 15031-5
DTC 1st trip DTCFreeze Frame
data1st trip Freeze
Frame dataSRT code Test value
CONSULT-II×× × × ×—
GST×× ×—××
ECM××*— ———
ItemsMI DTC 1st trip DTC
1st trip 2nd trip
1st trip
displaying2nd trip
displaying1st trip
displaying2nd trip
display-
ing BlinkingLighting
upBlinkingLighting
up
Misfire (Possible three way catalyst
damage) — DTC: P0300 - P0304 is
being detected×———— —×—
Misfire (Possible three way catalyst
damage) — DTC: P0300 - P0304 is
being detected——×——×——
One trip detection diagnoses
(Refer to EC-19
)—×——×———
Except above — — —×—××—

EC-64
[QR (WITH EURO-OBD)]
ON BOARD DIAGNOSTIC (OBD) SYSTEM

2. Perform AT- 4 3 , "HOW TO ERASE DTC (WITH GST)" . (The DTC in the TCM will be erased.)
3. Select Service $04 with GST (Generic Scan Tool).
No Tools
NOTE:
If the DTC is not for A/T related items (see EC-19, "
INDEX FOR DTC" ), skip step 2.
1. If the ignition switch stays ON after repair work, be sure to turn ignition switch OFF once.
Wait at least 10 seconds and then turn it ON (engine stopped) again.
2. Perform AT- 4 3 , "
HOW TO ERASE DTC (NO TOOLS)" . (The DTC in TCM will be erased.)
3. Change the diagnostic test mode from Mode II to Mode I by depressing the accelerator pedal. Refer to
EC-66, "
HOW TO SWITCH DIAGNOSTIC TEST MODE" .

If the battery is disconnected, the emission-related diagnostic information will be lost within 24
hours.

The following data are cleared when the ECM memory is erased.
–Diagnostic trouble codes
–1st trip diagnostic trouble codes
–Freeze frame data
–1st trip freeze frame data
–System readiness test (SRT) codes
–Test values
Actual work procedures are explained using a DTC as an example. Be careful so that not only the DTC, but all
of the data listed above, are cleared from the ECM memory during work procedures.
NATS (Nissan Anti-theft System)EBS010LM

If the security indicator lights up with the ignition switch in
the ON position or “NATS MALFUNCTION” is displayed on
“SELF-DIAG RESULTS” screen, perform self-diagnostic
results mode with CONSULT-II using NATS program card.
Refer to BL-108, "
NATS (NISSAN ANTI-THEFT SYSTEM)" .

Confirm no self-diagnostic results of NATS is displayed
before touching “ERASE” in “SELF-DIAG RESULTS” mode
with CONSULT-II.

When replacing ECM, initialization of NATS system and reg-
istration of all NATS ignition key IDs must be carried out
with CONSULT-II using NATS program card.
Therefore, be sure to receive all keys from vehicle owner.
Regarding the procedures of NATS initialization and all NATS ignition key ID registration, refer to
CONSULT-II Operation Manual, NATS.
Malfunction Indicator (MI)EBS010LN
DESCRIPTION
The MI is located on the instrument panel.
1. The MI will light up when the ignition switch is turned ON without
the engine running. This is a bulb check.
If the MI does not light up, refer to DI-35, "
WARNING LAMPS"
or see EC-518, "MI & DATA LINK CONNECTORS" .
2. When the engine is started, the MI should go off.
If the MI remains on, the on board diagnostic system has
detected an engine system malfunction.
ON BOARD DIAGNOSTIC SYSTEM FUNCTION
The on board diagnostic system has the following four functions.
SEF515Y
SAT652J

TROUBLE DIAGNOSIS
EC-79
[QR (WITH EURO-OBD)]
C
D
E
F
G
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J
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L
MA
EC

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
SEF983U
SEF976U
SEF977U

PRECAUTIONS
EC-537
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC

PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EBS010WG
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 EngineEBS010WH
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 erase the unnecessary malfunction information (repairs completed) from the ECM.
PrecautionEBS010WI

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

EC-578
[QR (WITHOUT EURO-OBD)]
TROUBLE DIAGNOSIS

Basic InspectionEBS010X7
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.
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
SEF983U
SEF976U
SEF977U

PRECAUTIONS
EC-979
[YD (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC

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-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 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