NISSAN X-TRAIL 2001 Service Repair Manual

TIME CONTROL UNIT
BCS-5
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BCS
Time Control Unit Inspection TableEKS002ZW
Terminal
No.Wire
colorConnections Operation condition Voltage (Approximate values)
1 L/B Power source (Fuse) — 12V
3 L/Y Super lock actuator Door key cylinder switchFree 0V
Released 12V
4G/RPassenger and rear doors lock
actuatorDoor lock/unlock switchFree 0V
Unlocked 12V
6 Y/R Super lock actuator Door key cylinder switchFree 0V
Sat 12V
8W/BCombination 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).0
10 W Power source (C/B) — 12V
11 LFront door lock actuator (driver
side)Door lock/unlock switchFree 0V
Unlocked 12V
14 R/B Door lock actuator Door lock/unlock switchFree 0V
Locked 12V
15 W/GSeat belt warning lamp (passen-
ger 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).0
16 B Ground — 0V
17 G Ignition switch (ON) — 12V
18 W/L Ignition key switch (Insert)Key inserted → key removed from
Ignition key cylinder12V → 0V
19 R/L Lighting switch 1ST, 2ND position: ON → OFF 12V → 0V
20 GY Door lock/Unlock switch Neutral → Locks 5V → 0V
21 BR/WSeat belt buckle switch (driver
side)Seat be lt buckle switch (d river side) is
unfastened.*10
Seat be lt buckle switch (d river side) is
fastened.*112V
22 G/ORSeat belt buckle switch (passen-
ger side)Seat belt buckle switch (passenger
side) is unfastened.0
Seat belt buckle switch (passenger
side) is fastened.12V
23 PU Door lock/Unlock switch Neutral → Unlocks 5V → 0V
24 OR/LDoor key cylinder switch (driver
side)OFF (Neutral) → ON (Locked) 5V → 0V
25 W/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 in “ON”
position)12V → 0V
28 Y/G Door unlock sensor (driver side) Driver door: Locked → Unlocked 5V → 0V
29 Y/L Door unlock sensor (Passenger) Passenger door: Locked → Unlocked 5V → 0V

BCS-6
TIME CONTROL UNIT
NOTE:
*1: When seat pressure switch is ON.
*2: Wire color is different depending on vehicle. Each wire color are as follows:
30 R 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 at “ON” position)0V → 5V
33 P/L Multi-remote control unitRemote controller unlock button is
pushed.
(Ignition switch is not at “ON” position)0V → 5V
34 B/Y NATS release signal Ignition switch ON→OFF 0V→5V
35 LG/B Rear window defogger switch OFF → ON 5V → 0V
36 *2 Combination meterWhen the vehicle speed is approx.
40km (25MPH). Te r m i n a l
No.Wire
colorConnections Operation condition Voltage (Approximate values)
ELF1080D
Vehicle Wire color
A/T models :L/W
M/T models with gasoline engine :L/Y
Diesel engine models :L/B

LAN-1
LAN SYSTEM
K ELECTRICAL
CONTENTS
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SECTION
A
B
LAN
LAN SYSTEM
CAN
PRECAUTIONS .......................................................... 2
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 2
Precautions For Trouble Diagnosis .......................... 2
CAN SYSTEM ....................................................... 2
Precautions For Harness Repair .............................. 2
CAN SYSTEM ....................................................... 2
CAN COMMUNICATION ............................................ 3
System Description .................................................. 3
FOR A/T MODELS ................................................ 3
FOR M/T MODELS ............................................... 3
CAN SYSTEM (FOR A/T MODELS) ........................... 5
System Description .................................................. 5
Component Parts and Harness Connector Location ..... 5
Wiring Diagram — CAN — ....................................... 6
Work Flow ................................................................ 7
CHECK SHEET ..................................................... 8
CHECK SHEET RESULTS (EXAMPLE) ............... 9
INSPECTION ........................................................ 9CAN Communication Circuit Check .......................... 9
Component Inspection ............................................ 11
ECM/TCM INTERNAL CIRCUIT INSPECTION ... 11
CAN SYSTEM (FOR M/T MODELS) ........................ 12
System Description ................................................. 12
Component Parts and Harness Connector Location ... 12
Wiring Diagram — CAN — ..................................... 13
Work Flow ............................................................... 14
CHECK SHEET ................................................... 15
CHECK SHEET RESULTS (EXAMPLE) ............. 16
INSPECTION ...................................................... 17
Circuit Check Between Steering Wheel Angle Sen-
sor and 4WD Control Unit ....................................... 17
ECM Circuit Check .............................................. ... 18
4WD Control Unit Circuit Check ............................. 19
Steering Wheel Angle Sensor Circuit Check .......... 20
ESP/TCS/ABS Control Unit Circuit Check .............. 20
CAN Communication Circuit Check ........................ 21
Component Inspection ............................................ 25
ECM / ESP/TCS/ABS CONTROL UNIT INTER-
NAL CIRCUIT INSPECTION ............................... 25

LAN-2
[CAN]
PRECAUTIONS
[CAN]PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EKS001U0
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 harness connec-
tors.
Precautions For Trouble DiagnosisEKS001U1
CAN SYSTEM
●Do not apply voltage of 7.0V or higher to the measurement terminals.
●Use the tester with its open terminal voltage being 7.0V or less.
Precautions For Harness RepairEKS001U2
CAN SYSTEM
●Solder the repaired parts, and wrap with tape. [Frays of twisted
line must be within 110 mm (4.33 in)]
●Do not perform bypass wire connections for the repair parts.
(The spliced wire will become separated and the characteristics
of twisted line will be lost.)
PKIA0306E
PKIA0307E

CAN COMMUNICATION
LAN-3
[CAN]
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LAN
CAN COMMUNICATIONPFP:23710
System DescriptionEKS001U3
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.
FOR A/T MODELS
System diagram
Input/output signal chart
T: Transmit R: Receive
FOR M/T MODELS
System diagram
Input/output signal chart
T: Transmit R: Receive
SKIA0884E
Signals ECM TCM
Engine coolant temperature signal T R
Accelerator pedal position signal T R
A/T self-diagnosis signal R T
SKIA0885E
Signals ECMSteering wheel
angle sensor4WD control unitESP/ TCS / ABS
control unit
Engine speed signal T R R
Accelerator pedal position signal T R
ESP operation signal R R T
TCS operation signal R R T
ABS operation signal R R T
Stop lamp switch signalRT
Steering wheel angle sensor signal T R
ESP-OFF switch signalRT

LAN-4
[CAN]
CAN COMMUNICATION
Wheel speed sensor signalRT
4WD mode signalTR Signals ECMSteering wheel
angle sensor4WD control unitESP/ TCS / ABS
control unit

CAN SYSTEM (FOR A/T MODELS)
LAN-5
[CAN]
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LAN
CAN SYSTEM (FOR A/T MODELS)PFP:23710
System DescriptionEKS002AD
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.
Component Parts and Harness Connector LocationEKS002AE
SKIA0980E

LAN-6
[CAN]
CAN SYSTEM (FOR A/T MODELS)
Wiring Diagram — CAN —
EKS002AF
TKWA0728E

CAN SYSTEM (FOR A/T MODELS)
LAN-7
[CAN]
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LAN
Work FlowEKS002AG
1. Print all the data of “SELF-DIAG RESULTS” and “DATA MONITOR” for “ENGINE” and “A/T” displayed on
CONSULT-II. Refer to the following:
●EC-854, "DTC U1000 CAN COMMUNICATION LINE" (QR20 WITH EURO-OBD) for “ENGINE”
●EC-1199, "DTC U1000 CAN COMMUNICATION LINE" (QR20 WITHOUT EURO-OBD) for “ENGINE”
●EC-122, "DTC U1000 CAN COMMUNICATION LINE" (QR25 WITH EURO-OBD) for “ENGINE”
●EC-513, "DTC U1000 CAN COMMUNICATION LINE" (QR25 WITHOUT EURO-OBD) for “ENGINE”
●AT-190, "DTC U1000 CAN COMMUNICATION LINE" (EURO-OBD) for “A/T”
●AT-403, "CAN COMMUNICATION LINE" (ALL) for “A/T”
2. Attach the printed sheet of “SELF-DIAG RESULTS” and “DATA MONITOR” onto the check sheet. Refer to
LAN-8, "
CHECK SHEET" .
3. Based on the data monitor results, put “v” marks onto the items with “UNKWN” or “NG” in the check sheet
table. Refer to LAN-8, "
CHECK SHEET" .
NOTE:
If “NG” is displayed on “CAN COMM” for the diagnosed control unit, replace the control unit.
4. According to the check sheet results (example), start inspection. Refer to LAN-9, "
CHECK SHEET
RESULTS (EXAMPLE)" .

LAN-8
[CAN]
CAN SYSTEM (FOR A/T MODELS)
CHECK SHEET
SKIA0886E