2003 NISSAN X-TRAIL fuse diagram

START SIGNAL
EC-1497
[YD (WITHOUT EURO-OBD)]
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Diagnostic ProcedureEBS0126N
1. CHECK START SIGNAL OVERALL FUNCTION
With CONSULT-II
1. Turn ignition switch ON.
2. Check “START SIGNAL” in “DATA MONITOR” mode with CON-
SULT-II under the following conditions.
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
2. CHECK START SIGNAL INPUT SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector and ignition switch harness connector.
3. Check harness continuity between ECM terminal 99 and ignition switch terminal 6.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3. DETECT MALFUNCTIONING PART
Check the following.

10A fuse

Fuse block (J/B) connectors M1, E102

Harness for open or short between ECM and ignition switch
>> Repair open circuit or short to ground or short to power in harness or connectors.
4. CHECK INTERMITTENT INCIDENT
Refer to EC-1260, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Condition START SIGNAL
Ignition switch ON OFF
Ignition switch START ON
PBIB0433E
Continuity should exist.

AT-118
[EURO-OBD]
DTC P0720 VEHICLE SPEED SENSOR·A/T (REVOLUTION SENSOR)

6. CHECK HARNESS BETWEEN TCM AND REVOLUTION SENSOR (POWER)
1. Turn ignition switch OFF.
2. Disconnect the TCM connector and revolution sensor harness connector.
3. Check continuity between TCM connector terminals and revolu-
tion sensor harness connector terminals. Refer to AT- 2 1 , "
Circuit
Diagram" and AT- 3 9 5 , "Wiring Diagram — AT — MAIN" .
4. If OK, check harness for short to ground and short power.
5. Reinstall any part removed.
OK or NG
OK >> Fuse or ignition switch are malfunctioning.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
7. CHECK HARNESS BETWEEN TCM AND REVOLUTION SENSOR (SENSOR GROUND)
1. Turn ignition switch OFF.
2. Disconnect the TCM connector and revolution sensor harness connector.
3. Check continuity between TCM connector terminal and revolu-
tion sensor harness connector terminal.
4. If OK, check harness for short to ground and short power.
5. Reinstall any part removed.
OK or NG
OK >> GO TO 5.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
8. CHECK DTC
Perform AT- 11 2 , "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 5.
Item Connector No. Terminal No.
(Wire color) Continuity
TCM F46 10 (BR/W)
Ye s
Revolution sensor F15 1 (Y)
Item Connector No. Terminal No.
(Wire color) Continuity
TCM F46 19 (BR/W)
Ye s
Revolution sensor F15 1 (Y)
SCIA2617E
Item Connector No. Terminal No.
(Wire color) Continuity
TCM F47 42 (B)
Ye s
Revolution sensor F15 3 (B)
SCIA2618E

AT-204
[EURO-OBD]
TROUBLE DIAGNOSES FOR SYMPTOMS

O/D OFF Indicator Lamp Does Not Come OnECS004SU
SYMPTOM:
O/D OFF indicator lamp does not come on for about 2 seconds
when turning ignition switch to “ON”.
1. CHECK TCM POWER SOURCE
1. Turn ignition switch to ON. (Do not start engine.)
2. Check voltage between TCM connector terminals 10, 19, 28 and ground.
3. Turn ignition switch to OFF.
4. Check voltage between TCM connector terminal 28 and ground.
OK or NG
OK >> GO TO 2.
NG >> Check the following items:

Harness for short or open between ignition switch and
TCM connector terminals 10, 19 and 28

Refer to AT- 3 9 5 , "Wiring Diagram — AT — MAIN" .

Ignition switch and fuse Refer to PG-2, "POWER SUPPLY ROUTING" .
2. CHECK TCM GROUND CIRCUIT
1. Turn ignition switch to OFF.
2. Disconnect TCM connector.
3. Check continuity between TCM connector terminals 25, 48 and
ground.
If OK, check harness for short to ground and short to power.
OK or NG
OK >> GO TO 3.
NG >> Repair open circuit or short to ground or short to power
in harness or connectors. Refer to AT- 3 9 5 , "
Wiring Dia-
gram — AT — MAIN" .
3. CHECK COMBINATION METERS SYSTEM
Check combination meters system. Refer to DI-12, "
Combination Meter" .
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.
SCIA4281E
Voltage: Battery voltage
Voltage: Battery voltage
SCIA0713E
Continuity should exist.
SCIA0766E

TROUBLE DIAGNOSES FOR SYMPTOMS
AT-291
[EXC.F/EURO-OBD]
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O/D OFF Indicator Lamp Does Not Come OnECS00EBE
SYMPTOM:
O/D OFF indicator lamp does not come on for about 2 seconds
when turning ignition switch to “ON”.
1. CHECK TCM POWER SOURCE
1. Turn ignition switch to ON. (Do not start engine.)
2. Check voltage between TCM connector terminals 10, 19, 28 and ground.
3. Turn ignition switch to OFF.
4. Check voltage between TCM connector terminal 28 and ground.
OK or NG
OK >> GO TO 2.
NG >> Check the following items:

Harness for short or open between ignition switch and
TCM connector terminals 10, 19 and 28

Refer to AT- 3 9 5 , "Wiring Diagram — AT — MAIN" .

Ignition switch and fuse Refer to PG-2, "POWER SUPPLY ROUTING" .
2. CHECK TCM GROUND CIRCUIT
1. Turn ignition switch to OFF.
2. Disconnect TCM connector.
3. Check continuity between TCM connector terminals 25, 48 and
ground.
If OK, check harness for short to ground and short to power.
OK or NG
OK >> GO TO 3.
NG >> Repair open circuit or short to ground or short to power
in harness or connectors. Refer to AT- 3 9 5 , "
Wiring Dia-
gram — AT — MAIN" .
3. CHECK COMBINATION METERS SYSTEM
Check combination meters system. Refer to DI-12, "
Combination Meter" .
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.
SCIA4281E
Voltage: Battery voltage
Voltage: Battery voltage
SCIA0713E
Continuity should exist.
SCIA0766E

AT-338
[ALL]
VEHICLE SPEED SENSOR·A/T (REVOLUTION SENSOR)

6. CHECK HARNESS BETWEEN TCM AND REVOLUTION SENSOR (POWER)
1. Turn ignition switch OFF.
2. Disconnect the TCM connector and revolution sensor harness connector.
3. Check continuity between TCM connector and revolution sensor
harness connector. Refer to AT- 2 1 , "
Circuit Diagram" and AT-
395, "Wiring Diagram — AT — MAIN" .
4. If OK, check harness for short to ground and short power.
5. Reinstall any part removed.
OK or NG
OK >> Fuse or ignition switch are malfunctioning.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
7. CHECK HARNESS BETWEEN TCM AND REVOLUTION SENSOR (SENSOR GROUND)
1. Turn ignition switch OFF.
2. Disconnect the TCM connector and revolution sensor harness connector.
3. Check continuity between TCM connector and revolution sensor
harness connector.
4. If OK, check harness for short to ground and short power.
5. Reinstall any part removed.
OK or NG
OK >> GO TO 5.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
8. CHECK DTC
Perform AT- 3 3 2 , "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 5.
Item Connector No. Terminal No.
(Wire color) Continuity
TCM F46 10 (BR/W)
Ye s
Revolution sensor F15 1 (Y)
Item Connector No. Terminal No.
(Wire color) Continuity
TCM F46 19 (BR/W)
Ye s
Revolution sensor F15 1 (Y)
SCIA2617E
Item Connector No. Terminal No.
(Wire color) Continuity
TCM F47 42 (B)
Ye s
Revolution sensor F15 3 (B)
SCIA2618E

SRS-8
TROUBLE DIAGNOSIS

TROUBLE DIAGNOSISPFP:00004
Trouble Diagnosis IntroductionEHS000CL
CAUTION:

Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harness can be identified by yellow and/or orange harnesses or har-
ness connector.

Do not attempt to repair, splice or modify the SRS wiring harness. If the harness is damaged,
replace it with a new one.

Keep ground portion clean.
DIAGNOSIS FUNCTION
The SRS self-diagnosis results can be read by using “AIR BAG” warning lamp and/or CONSULT-II.
The User mode is exclusively prepared for the customer (driver). This mode warns the driver of a system mal-
function through the operation of the “AIR BAG” warning lamp.
The Diagnosis mode allows the technician to locate and inspect the malfunctioning part.
The mode applications for the “AIR BAG” warning lamp and CONSULT-II are as follows:
NOTE:
Seat belt pre-tensioner malfunction is indicated by “AIR BAG” warning lamp.
HOW TO PERFORM TROUBLE DIAGNOSES FOR QUICK AND ACCURATE REPAIR
A good understanding of the malfunction conditions can make troubleshooting faster and more accurate.
In general, each customer feels differently about a malfunction. It is important to fully understand the symp-
toms or conditions for a customer complaint.
Information From Customer
WHAT..... Vehicle model
WHEN..... Date, Frequencies
WHERE..... Road conditions
HOW..... Operating conditions, Symptoms
Preliminary Check
Check that the following parts are in good order.

Battery (Refer to SC-3, "How to Handle Battery" .)

Fuse (Refer to SRS-11, "Wiring Diagram — SRS — /LHD models" or SRS-13, "Wiring Diagram — SRS
— /RHD models" .)

System component-to-harness connections
User mode Diagnosis mode Display type
“AIR BAG” warning lamp X X ON-OFF operation
CONSULT-II — X Monitoring

NATS (NISSAN ANTI-THEFT SYSTEM)
BL-121
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SYMPTOM MATRIX CHART 2
Non self-diagnosis related item
DIAGNOSTIC SYSTEM DIAGRAM
Diagnostic Procedure 1EIS008F6
Self-diagnostic results:
“ECM INT CIRC-IMMU” displayed on CONSULT-II screen
1. Confirm SELF-DIAGNOSTIC RESULTS “ECM INT CIRC-IMMU”
displayed on CONSULT-II screen. Ref. part No. B.
2. Replace ECM.
3. Perform initialization with CONSULT-II.
For initialization, refer to “CONSULT-II operation manual NATS”.
SYMPTOMDIAGNOSTIC PROCEDURE
(Reference page)SYSTEM
(Malfunctioning part or mode)REFERENCE PART NO. OF
ILLUSTRATION ON SYSTEM
DIAGRAM
Security Ind. does not light up.PROCEDURE 6
(BL-128
)Security Ind. —
Open circuit between Fuse and
IMMU—
Continuation of initialization
mode—
IMMU A
Security Ind. does not blink just
after initialization even if the
vehicle is equipped with don-
gle unit.
PROCEDURE 8
(BL-130
)NATS might be initialized with-
out connecting dongle unit
properly.—
Open circuit in ground line of
dongle unit circuitC6
Security Ind. does not blink just
after ignition switch is turned to
ON when some malfunction
related to NATS is detected
even if the vehicle is equipped
with dongle unit.Open or short circuit in commu-
nication line between IMMU
and dongle unitC5
Dongle unit G
SEL028X
SEL152X

PG-1
POWER SUPPLY, GROUND & CIRCUIT ELEMENTS
K ELECTRICAL
CONTENTS
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SECTION
A
B
PG

POWER SUPPLY, GROUND & CIRCUIT ELEMENTS
POWER SUPPLY ROUTING ...................................... 2
Schematic ................................................................ 2
Wiring Diagram - POWER - ..................................... 3
BATTERY POWER SUPPLY - IGNITION SW. IN
ANY POSITION ..................................................... 3
ACCESSORY POWER SUPPLY - IGNITION SW.
IN “ACC” OR “ON” ................................................ 7
IGNITION POWER SUPPLY - IGNITION SW. IN
“ON” AND/OR “START” ......................................... 8
Fuse ....................................................................... 12
Fusible Link ............................................................ 12
Circuit Breaker ....................................................... 12
GROUND .................................................................. 13
Ground Distribution ................................................ 13
MAIN HARNESS/LHD MODELS ........................ 13
MAIN HARNESS/RHD MODELS ........................ 16
ENGINE ROOM HARNESS/LHD MODELS ....... 19
ENGINE ROOM HARNESS/RHD MODELS ....... 20
ENGINE ROOM HARNESS ................................ 21
ENGINE CONTROL HARNESS/GASOLINE
ENGINE MODELS .............................................. 22
ENGINE CONTROL HARNESS/DIESEL
ENGINE MODELS .............................................. 23
BODY HARNESS/LHD MODELS ....................... 24
BODY HARNESS/RHD MODELS ....................... 25
BODY NO. 2 HARNESS/LHD MODELS ............. 26
BODY NO. 2 HARNESS/RHD MODELS ............ 27
ROOM LAMP HARNESS .................................... 28
BACK DOOR SUB HARNESS/REAR WINDOW
DEFOGGER HARNESS ..................................... 29
HARNESS ................................................................. 30
Harness Layout ...................................................... 30
HOW TO READ HARNESS LAYOUTS ............... 30
OUTLINE/LHD MODELS .................................... 31
OUTLINE/RHD MODELS .................................... 32
MAIN HARNESS/LHD MODELS ........................ 33MAIN HARNESS/RHD MODELS ........................ 35
ENGINE ROOM HARNESS/LHD MODELS ........ 37
ENGINE ROOM HARNESS/RHD MODELS ....... 42
ENGINE CONTROL HARNESS .......................... 47
BODY HARNESS/LHD MODELS ....................... 52
BODY HARNESS/RHD MODELS ....................... 53
BODY NO. 2 HARNESS/LHD MODELS ............. 54
BODY NO. 2 HARNESS/RHD MODELS ............. 55
ROOM LAMP HARNESS .................................... 56
FRONT DOOR HARNESS/LHD MODELS .......... 57
FRONT DOOR HARNESS/RHD MODELS ......... 58
REAR DOOR HARNESS .................................... 59
BACK DOOR HARNESS .................................... 60
Wiring Diagram Codes (Cell Codes) ...................... 61
ELECTRICAL UNITS LOCATION ............................ 65
Electrical Units Location ......................................... 65
ENGINE COMPARTMENT .................................. 65
PASSENGER COMPARTMENT/LHD MODELS ... 66
PASSENGER COMPARTMENT/RHD MODELS ... 68
HARNESS CONNECTOR ......................................... 70
Description .............................................................. 70
HARNESS CONNECTOR (TAB-LOCKING
TYPE) .................................................................. 70
HARNESS CONNECTOR (SLIDE-LOCKING
TYPE) .................................................................. 71
ELECTRICAL UNITS ................................................ 72
Terminal Arrangement ............................................ 72
STANDARDIZED RELAY .......................................... 73
Description .............................................................. 73
NORMAL OPEN, NORMAL CLOSED AND
MIXED TYPE RELAYS ........................................ 73
TYPE OF STANDARDIZED RELAYS ................. 73
FUSE BLOCK - JUNCTION BOX (J/B) .................... 75
Terminal Arrangement ............................................ 75
FUSE AND FUSIBLE LINK BOX .............................. 76
Terminal Arrangement ............................................ 76