NISSAN X-TRAIL 2003 Service Repair Manual

BCS-1
BODY CONTROL SYSTEM
K ELECTRICAL
CONTENTS
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SECTION
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BCS

BODY CONTROL SYSTEM
PRECAUTIONS .......................................................... 2
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 2
Wiring Diagrams and Trouble Diagnosis .................. 2
TIME CONTROL UNIT ............................................... 3Description ................................................................ 3
OUTLINE ............................................................... 3
INPUT/OUTPUT .................................................... 3
Schematic ................................................................. 4
Time Control Unit Inspection Table ........................... 5

BCS-2
PRECAUTIONS

PRECAUTIONS PFP:00011
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EKS0079N
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.
Wiring Diagrams and Trouble Diagnosis EKS0079O
When reading wiring diagrams, refer to the following:

GI-14, "How to Read Wiring Diagrams" in GI section

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

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

GI-23, "How to Perform Efficient Diagnosis for an Electrical Incident" in PG section

TIME CONTROL UNIT
BCS-3
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TIME CONTROL UNITPFP:28491
DescriptionEKS002ZU
OUTLINE
The time control unit totally controls the following body electrical system operations.

Power door lock

Warning chime

Rear window defogger

Interior lamp

Seat belt warning
INPUT/OUTPUT
System Input Output
Power door lockDoor lock and unlock switch
Door switches
Door unlock sensor
Door key cylinder switch (driver side)Door lock actuators
Warning chimeKey switch (Insert)
Ignition switch (ON)
Lighting switch (1st)
Front door switch (driver side)
Door unlock sensorWarning chime (located in time control unit)
Rear window defoggerIgnition switch (ON)
Rear window defogger switchRear window defogger relay
Interior lampDoor switches
Door unlock sensor
Ignition switch (ON)
Key switch (Insert)Interior lamp
Seat belt warningSeat belt buckle switch (driver side)
Seat belt buckle switch (passenger side)
Combination meter (vehicle speed signal)Warning chime (located in time control unit)
Combination meter (Seat belt warning lamp)

BCS-4
TIME CONTROL UNIT

SchematicEKS002ZV
TKWA1515E

TIME CONTROL UNIT
BCS-5
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Time Control Unit Inspection TableEKS002ZW
Terminal
No.Wire
colorConnections Operation condition Voltage (Approximate values)
1 L Power source (Fuse) — 12V
3 *1 L/Y Super lock actuator Door key cylinder switchFree 0V
Released
4 G/RPassenger and rear doors lock
actuatorDoor lock/unlock switchFree 0V
Unlocked
6 *1 Y/R Super lock actuator Door key cylinder switchFree 0V
Set
8RCombination meter
[seat belt (driver side)]Seat belt warning lamp (driver side) is
illuminated (seat belt is unfastened).12V
Seat belt warning lamp (driver side) is
not illuminated (seat belt is fastened).0V
10 W Power source (C/B) — 12V
11 S BFront door lock actuator
(driver side)Door lock/unlock switchFree 0V
Unlocked
14 R/B Door lock actuator Door lock/unlock switchFree 0V
Locked
SKIA9232E
SKIA9232E
SKIA9232E
SKIA9232E
SKIA9232E

BCS-6
TIME CONTROL UNIT

15 W/GSeat belt warning lamp
(passenger side)Seat belt warning lamp (passenger
side) is illuminated (seat belt is unfas-
tened).12V
Seat belt warning lamp (passenger
side) is not illuminated (seat belt is
unfastened).0V
16 B/R Ground — 0V
17 G Ignition switch (ON) — 12V
18 W/L Ignition key switch (Insert)Key inserted → key removed from Igni-
tion key cylinder12V → 0V
19 R/L Lighting switch 1ST, 2ND position: ON → OFF 12V → 0V
20 GY Door lock/unlock switch Neutral → Locked 5V → 0V
21 BR/WSeat belt buckle switch
(driver side)Seat belt buckle switch (driver side) is
unfastened.*20V
Seat belt buckle switch (driver side) is
fastened.*212V
22 G/ORSeat belt buckle switch
(passenger side)Seat belt buckle switch (passenger
side) is unfastened.0V
Seat belt buckle switch (passenger
side) is fastened.12V
23 PU Door lock/unlock switchNeutral → Door lock/Unlock switch is
pushed.5V → 0V
24 LG/RDoor key cylinder switch
(driver side)OFF (neutral) → ON (locked) 5V → 0V
25 GY/LDoor key cylinder switch
(driver side)OFF (neutral) → ON (unlocked) 5V → 0V
26 R/Y Interior room lampWhen interior room lamp is operated
using remote controller
(Lamp switch is “DOOR” position.)12V → 0V
27 G/W Rear window defogger relayOFF → ON
(Ignition key is “ON” position.)12V → 0V
28 Y/G Door unlock sensor (driver side) Driver door: Locked → Unlocked 10V → 0V
29*1 Y/LDoor unlock sensor
(passenger side)Passenger door: Locked → Unlocked 5V → 0V
30 SB Front door switch (driver side) OFF (closed) → ON (open) 5V → 0V
31 R/W Passenger and rear doors switch OFF (closed) → ON (open) 5V → 0V
32 OR Multi-remote control unitRemote controller lock button is pushed.
(Ignition switch is not “ON” position.)0V → 5V
33 P/L Multi-remote control unitRemote controller unlock button is
pushed.
(Ignition switch is not “ON” position.)0V → 5V
34 B/Y NATS release signal Ignition switch ON→OFF 0V → 5V Terminal
No.Wire
colorConnections Operation condition Voltage (Approximate values)

TIME CONTROL UNIT
BCS-7
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NOTE:
*1: With super lock system.
*2: When seat pressure switch is ON.
*3: Wire color is different depending on vehicle. Each wire color is as follows:
35 LG/B Rear window defogger switchRear window defogger switch is
pushed.0V
Rear window defogger switch is not
pushed.5V
36 *3 Combination meterWhen the vehicle speed is approx. 40
km (25 MPH). Terminal
No.Wire
colorConnections Operation condition Voltage (Approximate values)
ELF1080D
Vehicle Wire color
A/T models L/B
M/T models L/Y

BCS-8
TIME CONTROL UNIT

LAN-1
LAN SYSTEM
K ELECTRICAL
CONTENTS
C
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SECTION
A
B
LAN

LAN SYSTEM
CAN
PRECAUTIONS .......................................................... 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 3
Precautions For Trouble Diagnosis .......................... 3
CAN SYSTEM ....................................................... 3
Precautions For Harness Repair .............................. 3
CAN SYSTEM ....................................................... 3
CAN COMMUNICATION ............................................ 4
System Description .................................................. 4
CAN Communication Unit ........................................ 4
TYPE 1 .................................................................. 4
TYPE 2 .................................................................. 5
TYPE 3/TYPE4 ..................................................... 6
TYPE 5 .................................................................. 7
CAN SYSTEM (TYPE 1) ............................................. 9
System Description .................................................. 9
Component Parts and Harness Connector Location ..... 9
Wiring Diagram — CAN — ..................................... 10
Work Flow .............................................................. 12
CHECK SHEET ................................................... 13
CHECK SHEET RESULTS (EXAMPLE) ............. 14
Between ABS Actuator and Electric Unit (Control
Unit) and 4WD Control Unit Circuit Inspection ....... 19
ECM Circuit Inspection ........................................... 20
ABS Actuator and Electric Unit (Control Unit) Circuit
Inspection ............................................................... 21
4WD Control Unit Circuit Inspection ....................... 21
Combination Meter Circuit Inspection .................... 22
CAN Communication Circuit Inspection ................. 22
Component Inspection ........................................... 24
CHECK ECM AND COMBINATION METER
INTERNAL CIRCUIT ........................................... 24
CAN SYSTEM (TYPE 2) ........................................... 25
System Description ................................................ 25
Component Parts and Harness Connector Location ... 25
Wiring Diagram — CAN — ..................................... 26
Work Flow .............................................................. 28
CHECK SHEET ................................................... 29CHECK SHEET RESULTS (EXAMPLE) ............. 30
Between TCM and ABS Actuator and Electric Unit
(Control Unit) Circuit Inspection .............................. 37
Between ABS Actuator and Electric Unit (Control
Unit) and 4WD Control Unit Circuit Inspection ....... 39
ECM Circuit Inspection ........................................... 41
TCM Circuit Inspection ........................................... 42
ABS Actuator and Electric Unit (Control Unit) Circuit
Inspection ............................................................... 42
4WD Control Unit Circuit Inspection ....................... 43
Combination Meter Circuit Inspection ..................... 43
CAN Communication Circuit Inspection ................. 44
Component Inspection ............................................ 49
CHECK ECM AND COMBINATION METER
INTERNAL CIRCUIT ........................................... 49
CAN SYSTEM (TYPE 3) ........................................... 50
System Description ................................................. 50
Component Parts and Harness Connector Location ... 50
Wiring Diagram — CAN — ..................................... 51
Work Flow ............................................................... 53
CHECK SHEET ................................................... 54
CHECK SHEET RESULTS (EXAMPLE) ............. 55
Between ESP/TCS/ABS Control Unit and 4WD
Control Unit Circuit Inspection ................................ 61
ECM Circuit Inspection ........................................... 62
ESP/TCS/ABS Control Unit Circuit Inspection ....... 63
Steering Angle Sensor Circuit Inspection ............... 63
4WD Control Unit Circuit Inspection ....................... 64
Combination Meter Circuit Inspection ..................... 64
CAN Communication Circuit Inspection ................. 65
Component Inspection ............................................ 67
CHECK ECM AND COMBINATION METER
INTERNAL CIRCUIT ........................................... 67
CAN SYSTEM (TYPE 4) ........................................... 68
System Description ................................................. 68
Component Parts and Harness Connector Location ... 68
Wiring Diagram — CAN — ..................................... 69
Work Flow ............................................................... 71
CHECK SHEET ................................................... 72
CHECK SHEET RESULTS (EXAMPLE) ............. 73

LAN-2 Between ESP/TCS/ABS Control Unit and 4WD
Control Unit Circuit Inspection ................................ 79
ECM Circuit Inspection ........................................... 80
ESP/TCS/ABS Control Unit Circuit Inspection ........ 81
Steering Angle Sensor Circuit Inspection ............... 81
4WD Control Unit Circuit Inspection ....................... 82
Combination Meter Circuit Inspection ..................... 82
CAN Communication Circuit Inspection .................. 83
Component Inspection ............................................ 85
CHECK ECM AND COMBINATION METER
INTERNAL CIRCUIT ........................................... 85
CAN SYSTEM (TYPE 5) ........................................... 86
System Description ................................................. 86
Component Parts and Harness Connector Location ... 86
Wiring Diagram — CAN — ..................................... 87
Work Flow ............................................................... 89CHECK SHEET ................................................... 90
CHECK SHEET RESULTS (EXAMPLE) .............. 91
Between TCM and ESP/TCS/ABS Control Unit Cir-
cuit Inspection ......................................................... 99
Between ESP/TCS/ABS Control Unit and 4WD
Control Unit Circuit Inspection ..............................101
ECM Circuit Inspection .........................................103
TCM Circuit Inspection ..........................................104
ESP/TCS/ABS Control Unit Circuit Inspection ......104
Steering Angle Sensor Circuit Inspection ..............105
4WD Control Unit Circuit Inspection .....................105
Combination Meter Circuit Inspection ...................106
CAN Communication Circuit Inspection ................107
Component Inspection .......................................... 111
CHECK ECM AND COMBINATION METER
INTERNAL CIRCUIT .......................................... 111