2003 NISSAN X-TRAIL ECU

BL-1
BODY, LOCK & SECURITY SYSTEM
I BODY
CONTENTS
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BODY, LOCK & SECURITY SYSTEM
PRECAUTIONS .......................................................... 4
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 4
Precautions for Work ................................................ 4
Wiring Diagnosis and Trouble Diagnosis ................. 4
PREPARATION ........................................................... 5
Commercial Service Tools ........................................ 5
SQUEAK AND RATTLE TROUBLE DIAGNOSES ..... 6
Work Flow ................................................................ 6
CUSTOMER INTERVIEW ..................................... 6
DUPLICATE THE NOISE AND TEST DRIVE ....... 7
CHECK RELATED SERVICE BULLETINS ........... 7
LOCATE THE NOISE AND IDENTIFY THE
ROOT CAUSE ...................................................... 7
REPAIR THE CAUSE ........................................... 7
CONFIRM THE REPAIR ....................................... 8
Generic Squeak and Rattle Troubleshooting ........... 8
INSTRUMENT PANEL .......................................... 8
CENTER CONSOLE ............................................. 8
DOORS ................................................................. 8
TRUNK .................................................................. 9
SUNROOF/HEADLINING ..................................... 9
SEATS ................................................................... 9
UNDERHOOD ....................................................... 9
Diagnostic Worksheet ............................................ 10
HOOD ....................................................................... 12
Fitting Adjustment .................................................. 12
LONGITUDINAL AND LATERAL CLEARANCE
ADJUSTMENT .................................................... 12
FRONT END HEIGHT ADJUSTMENT ............... 12
SURFACE HEIGHT ADJUSTMENT ................... 14
Removal and Installation of Hood Assembly .......... 15
REMOVAL ........................................................... 15
INSTALLATION ................................................... 15
Removal and Installation of Hood Lock Control ..... 16
REMOVAL ........................................................... 16
INSTALLATION ................................................... 16
Hood Lock Control Inspection ................................ 17
DOOR ....................................................................... 18Fitting Adjustment ................................................... 18
FRONT DOOR .................................................... 18
REAR DOOR ....................................................... 18
STRIKER ADJUSTMENT .................................... 18
Removal and Installation of Front Door .................. 19
REMOVAL ........................................................... 19
INSTALLATION ................................................... 19
Removal and Installation of Rear Door ................... 19
REMOVAL ........................................................... 20
INSTALLATION ................................................... 20
Door Weatherstrip .................................................. 21
REMOVAL ........................................................... 21
INSTALLATION ................................................... 21
POWER DOOR LOCK SYSTEM .............................. 22
System Description ................................................. 22
OPERATION ........................................................ 22
Component Parts and Harness Connector Location ... 22
Schematic ............................................................... 23
Wiring Diagram — D/LOCK — ............................... 24
Terminal and Reference Value for Time Control Unit ... 28
Symptom Chart ....................................................... 29
Power Supply and Ground Circuit Check ............... 29
Door Lock/Unlock Switch Check ............................ 30
Door Key Cylinder Switch Check ............................ 32
Front Door Lock Actuator (Driver Side) Check ....... 34
Front Door Lock Actuator (Passenger Side) Check ... 35
Rear Door Lock Actuator LH Check ....................... 36
Rear Door Lock Actuator RH Check ....................... 37
Back Door Lock Actuator Check ............................. 38
Door Switch Check ................................................. 39
Door Unlock Sensor Check .................................... 40
Key Switch Check ................................................... 41
POWER DOOR LOCK — SUPER LOCK — ............ 42
System Description ................................................. 42
OUTLINE ............................................................. 42
OPERATION ........................................................ 42
Schematic ............................................................... 44
Wiring Diagram — S/LOCK — ............................... 45
Terminal and Reference Value for Time Control Unit ... 51
Trouble Diagnoses ................................................. 53

SQUEAK AND RATTLE TROUBLE DIAGNOSES
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DUPLICATE THE NOISE AND TEST DRIVE
If possible, drive the vehicle with the customer until the noise is duplicated. Note any additional information on
the Diagnostic Worksheet regarding the conditions or location of the noise. This information can be used to
duplicate the same conditions when you confirm the repair.
If the noise can be duplicated easily during the test drive, to help identify the source of the noise, try to dupli-
cate the noise with the vehicle stopped by doing one or all of the following:
1) Close a door.
2) Tap or push/pull around the area where the noise appears to be coming from.
3) Rev the engine.
4) Use a floor jack to recreate vehicle “twist”.
5) At idle, apply engine load (electrical load, half-clutch on M/T model, drive position on A/T model).
6) Raise the vehicle on a hoist and hit a tire with a rubber hammer.

Drive the vehicle and attempt to duplicate the conditions the customer states exist when the noise occurs.

If it is difficult to duplicate the noise, drive the vehicle slowly on an undulating or rough road to stress the
vehicle body.
CHECK RELATED SERVICE BULLETINS
After verifying the customer concern or symptom, check ASIST for Technical Service Bulletins (TSBs) related
to that concern or symptom.
If a TSB relates to the symptom, follow the procedure to repair the noise.
LOCATE THE NOISE AND IDENTIFY THE ROOT CAUSE
1. Narrow down the noise to a general area. To help pinpoint the source of the noise, use a listening tool
(Engine Ear or mechanics stethoscope).
2. Narrow down the noise to a more specific area and identify the cause of the noise by:

removing the components in the area that you suspect the noise is coming from.
Do not use too much force when removing clips and fasteners, otherwise clips and fastener can be broken
or lost during the repair, resulting in the creation of new noise.

tapping or pushing/pulling the component that you suspect is causing the noise.
Do not tap or push/pull the component with excessive force, otherwise the noise will be eliminated only
temporarily.

feeling for a vibration with your hand by touching the component(s) that you suspect is (are) causing the
noise.

placing a piece of paper between components that you suspect are causing the noise.

looking for loose components and contact marks.
Refer to BL-8, "
Generic Squeak and Rattle Troubleshooting" .
REPAIR THE CAUSE

If the cause is a loose component, tighten the component securely.

If the cause is insufficient clearance between components:
–separate components by repositioning or loosening and retightening the component, if possible.
–insulate components with a suitable insulator such as urethane pads, foam blocks, felt cloth tape or ure-
thane tape are available through your authorized Nissan Parts Department.
CAUTION:
Do not use excessive force as many components are constructed of plastic and may be damaged.
Always check with the Parts Department for the latest parts information.
Each item can be ordered separately as needed.
URETHANE PADS [1.5 mm (0.059 in) thick]
Insulates connectors, harness, etc.
76268-9E005: 100 × 135 mm (3.94 × 5.31 in)/76884-71L01: 60×85 mm (2.36 × 3.35 in)/76884-71L02: 15 ×
25 mm (0.59 × 0.98 in)
INSULATOR (Foam blocks)
Insulates components from contact.Can be used to fill space behind a panel.
73982-9E000: 45 mm (1.77 in) thick, 50 × 50 mm (1.97 × 1.97 in)/73982-50Y00: 10 mm (0.39 in) think,
50 × 50 mm (1.97 × 1.97 in)
INSULATOR (Light foam block)
80845-71L00: 30 mm (1.18 in) thick, 30 × 50 mm (1.18 × 1.97 in)

SQUEAK AND RATTLE TROUBLE DIAGNOSES
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TRUNK
Trunk noises are often caused by a loose jack or loose items put into the trunk by the owner.
In addition look for:
1. Trunk lid dumpers out of adjustment
2. Trunk lid striker out of adjustment
3. Trunk lid torsion bars knocking together
4. A loose license plate or bracket
Most of these incidents can be repaired by adjusting, securing or insulating the item(s) or component(s) caus-
ing the noise.
SUNROOF/HEADLINING
Noises in the sunroof/headlining area can often be traced to one of the following:
1. Sunroof lid, rail, linkage or seals making a rattle or light knocking noise
2. Sunvisor shaft shaking in the holder
3. Front or rear windshield touching headlining and squeaking
Again, pressing on the components to stop the noise while duplicating the conditions can isolate most of these
incidents. Repairs usually consist of insulating with felt cloth tape.
SEATS
When isolating seat noise it's important to note the position the seat is in and the load placed on the seat when
the noise is present. These conditions should be duplicated when verifying and isolating the cause of the
noise.
Cause of seat noise include:
1. Headrest rods and holder
2. A squeak between the seat pad cushion and frame
3. Rear seatback lock and bracket
These noises can be isolated by moving or pressing on the suspected components while duplicating the con-
ditions under which the noise occurs. Most of these incidents can be repaired by repositioning the component
or applying urethane tape to the contact area.
UNDERHOOD
Some interior noise may be caused by components under the hood or on the engine wall. The noise is then
transmitted into the passenger compartment.
Causes of transmitted underhood noise include:
1. Any component mounted to the engine wall
2. Components that pass through the engine wall
3. Engine wall mounts and connectors
4. Loose radiator mounting pins
5. Hood bumpers out of adjustment
6. Hood striker out of adjustment
These noise can be difficult to isolate since they cannot be reached from the interior of the vehicle. The best
method is to secure, move or insulate one component at a time and test drive the vehicle. Also, engine RPM
or load can be changed to isolate the noise. Repairs can usually be made by moving, adjusting securing, or
insulating the component causing the noise.

BL-14
HOOD

SURFACE HEIGHT ADJUSTMENT
1. Remove hood lock, and adjust the surface height difference of hood, fender and headlamp according to
the fitting standard dimension, by rotating RH and LH bumper rubbers.
2. Install hood lock temporarily, and move hood lock laterally until the centers of striker and lock become ver-
tical when viewed from the front.
3. Make sure that the hood lock secondary latch is properly
engaged with the secondary striker with hood's own weight.
4. Make sure that the hood lock primary latch is securely engaged
with the hood striker with hood's own weight by dropping hood
from approx. 200 mm(7.87 in) height.
CAUTION:
Do not drop hood from a height of 300 mm (11.81 in) or
more.
5. Move hood lockup and down until striker smoothly engages the
lock when the hood is closed.
6. When pulling the hood opener lever gently, make sure that front
end of the hood rises by approximately 20 mm (0.79 in) and that hood striker and hood lock primary latch
is disengaged. Also make sure that hood opener returns to the original position.
7. After adjustment, tighten lock bolts to the specified torque.
PIIB1082E

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HOOD

Removal and Installation of Hood Lock ControlEIS009QJ
REMOVAL
1. Remove hood lock cable from hood lock and clip of upper por-
tion of radiator core support and hood ledge.
2. Remove dash side finisher. Refer to EI-35, "
BODY SIDE TRIM" .
3. Remove attaching screw and then the hood opener.
4. Remove dash panel grommet and pull hood lock cable toward
the passenger compartment.
NOTE:
When pulling the cable, be careful not to strip or scratch the
outer surface.
INSTALLATION
1. Pass hood lock cable through the opening while keeping the
winding radius 100 mm (3.94 in) or larger.
2. After confirming that the grommet is properly positioned, push
the grommet securely into the hole.
3. Apply sealant to the area on the grommet indicated with the *
mark.
PIIA3650E
SIIA0156E
PIIA0173E

HOOD
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4. Connect cable securely to the lock.
5. After connection, confirm proper adjustment and operation for
both hood lock and hood opener.
Hood Lock Control InspectionEIS009QK
CAUTION:
If the hood lock cable is bent or deformed, replace it.
1. Make sure that the hood lock secondary latch is securely
engaged with the secondary striker with hood's own weight.
2. Make sure that the hood lock primary latch is securely engaged
with the hood striker with hood's own weight by dropping it from
approx 200 mm (7.87 in) height.
CAUTION:
Do not drop hood from a height of 300 mm (11.81 in) or
more.
3. When pulling hood opener lever gently, make sure that front end of the hood rises by approximately 20
mm (0.79 in) and that hood striker and hood lock primary latch are disengaged. Also make sure that hood
opener returns to the original position.
4. Confirm hood lock is properly lubricated. If necessary, apply
“body grease” at the point shown in the figure.
PIIA3552E
PIIB1082E
PIIA3550E

FRONT DOOR LOCK
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14. Remove outside handle mount bolts and slide the outside han-
dle rearward to pull the front end of the outside handle escutch-
eon from the outer panel. Remove outside handle.
INSTALLATION
Install in the reverse order of removal.
NOTE:

Install the outside handle by pressing it forward and downward while tightening the bolts.

Install each rod by rotating the rod holder until it engages with a tactile feel.
Disassembly and AssemblyEIS009QP
DISASSEMBLY
NOTE:
The door lock actuator must be removed and installed with the door lock assembly off the vehicle.
1. Remove mount screws and door lock actuator from door lock
assembly.
2. Pull the door lock actuator straight down to separate it from door
lock assembly.
ASSEMBLY
1. Align door lock actuator pivot with the door lock assembly knob lever cutout.
2. Move the knob lever and door lock actuator pivot toward the LOCK position to ensure that they are
securely engaged.
Disassembly and AssemblyEIS009QQ
DISASSEMBLY (SUPER LOCK)
NOTE:
The door lock actuator must be removed and installed with the door lock assembly off the vehicle.
1. Disconnect lock knob rod.
2. Remove mount screws and door lock actuator from door lock
assembly.
3. Pull the door lock actuator straight down to separate it from door
lock assembly.
SIIA0161E
PIIA0558E
PIIB1433E

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FRONT DOOR LOCK

ASSEMBLY
1. Align door lock actuator pivot with the door lock assembly knob lever cutout.
2. Move the knob lever and door lock actuator pivot toward the LOCK position to ensure that they are
securely engaged.