2008 NISSAN TEANA Ccu

DEF-6
< FUNCTION DIAGNOSIS >
REAR WINDOW DEFOGGER SYSTEM
WITHOUT AV CONTROL UNIT
WITHOUT AV CONTROL UNIT : System DiagramINFOID:0000000003806029
WITHOUT AV CONTROL UNIT : System DescriptionINFOID:0000000003806030
Operation Description
 Turn rear window defogger switch ON when the ignition switch is turned ON. Then A/C control unit (rear win-
dow defogger switch) transmits rear window defogger switch signal to A/C auto amp. and BCM.
 BCM turns rear window defogger relay ON and transmits rear window defogger control signal to IPDM E/R
via CAN communication when rear window defogger switch signal is received.
 Rear window defogger and door mirror defogger are supplied with power and operate when rear window
defogger relay turns ON.
 Rear window defogger relay transmits rear window defogger control signal to A/C auto amp. when rear win-
dow defogger operates.
 When receiving the signal, A/C auto amp. indicates rear defogger ON on the display. At the same time, A/C
auto amp. transmits rear defogger control signal to A/C control unit (rear window defogger switch) and illumi-
nates rear defogger switch indicator.
Timer function
 BCM turns rear window defogger relay ON for approximately 15 minutes when rear window defogger switch
is turned ON. It makes rear window defogger and door mirror defogger (with door mirror defogger) operate.
 Timer is canceled after pressing rear window defogger switch again during timer operation. Then BCM turns
rear window defogger relay OFF. The same reaction also occurs during timer operation, if the ignition switch
is turned OFF.
INPUT/OUTPUT SIGNAL CHART
JMLIA0154GB
Switch Input signal to BCM BCM function Actuator
Rear window defogger switch Defogger switch signal
Rear window defogger & Door mir-
ror defogger controlRear window defogger
Door mirror defogger
Push button ignition switch Ignition signal

DLK-8
< BASIC INSPECTION >[WITH INTELLIGENT KEY SYSTEM]
DIAGNOSIS AND REPAIR WORKFLOW
1.GET INFORMATION FOR SYMPTOM
Get the detailed information from the customer about the symptom (the condition and the environment when
the incident/malfunction occurred).
>> GO TO 2.
2.CHECK DTC
1. Check DTC for BCM.
2. Perform the following procedure if DTC is displayed.
- Record DTC and freeze frame data (print them out with CONSULT-III).
- Erase DTC.
- Study the relationship between the cause detected by DTC and the symptom described by the customer.
3. Check related service bulletins for information.
Is any symptom described and any DTC detected?
Symptom is described, DTC is displayed>>GO TO 3.
Symptom is described, DTC is not displayed>>GO TO 4.
Symptom is not described, DTC is displayed>>GO TO 5.
3.CONFIRM THE SYMPTOM
Confirm the symptom described by the customer.
Connect CONSULT-III to the vehicle in “DATA MONITOR” mode and check real time diagnosis results.
Verify relation between the symptom and the condition when the symptom is detected.
>> GO TO 5.
4.CONFIRM THE SYMPTOM
Confirm the symptom described by the customer.
Connect CONSULT-III to the vehicle in “DATA MONITOR” mode and check real time diagnosis results.
Verify relation between the symptom and the condition when the symptom is detected.
>> GO TO 6.
5.PERFORM DTC CONFIRMATION PROCEDURE
Perform DTC Confirmation Procedure for the displayed DTC, and then check that DTC is detected again.
At this time, always connect CONSULT-III to the vehicle, and check diagnostic results in real time.
If two or more DTCs are detected, refer to DLK-152, "
DTCInspectionPriorityChart" (BCM) determine trou-
ble diagnosis order.
NOTE:
Perform Component Function Check if DTC Confirmation Procedure is not included in Service Manual. This
simplified check procedure is an effective alternative though DTC cannot be detected during this check.
If the result of Component Function Check is NG, it is the same as the detection of DTC by DTC Confirmation
Procedure.
Is DTC detected?
YES >> GO TO 7.
NO >> Refer to GI-35, "
Intermittent Incident".
6.DETECT MALFUNCTIONING SYSTEM BY SYMPTOM DIAGNOSIS
Detect malfunctioning system according to SYMPTOM DIAGNOSIS based on the confirmed symptom in step
4, and determine the trouble diagnosis order based on possible causes and symptom.
>> GO TO 7.
7.DETECT MALFUNCTIONING PART BY DIAGNOSTIC PROCEDURE
Inspect according to Diagnostic Procedure of the system.
NOTE:
The Diagnostic Procedure described based on open circuit inspection. A short circuit inspection is also
required for the circuit check in the Diagnostic Procedure.

DLK-182
< SYMPTOM DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
SQUEAK AND RATTLE TROUBLE DIAGNOSES
SQUEAK AND RATTLE TROUBLE DIAGNOSES
Work FlowINFOID:0000000003941377
CUSTOMER INTERVIEW
Interview the customer if possible, to determine the conditions that exist when the noise occurs. Use the Diag-
nostic Worksheet during the interview to document the facts and conditions when the noise occurs and any of
the customer's comments; refer to DLK-186, "
Diagnostic Worksheet". This information is necessary to dupli-
cate the conditions that exist when the noise occurs.
 The customer may not be able to provide a detailed description or the location of the noise. Attempt to obtain
all the facts and conditions that exist when the noise occurs (or does not occur).
 If there is more than one noise in the vehicle, be sure to diagnose and repair the noise that the customer is
concerned about. This can be accomplished by a test drive with the customer.
 After identifying the type of noise, isolate the noise in terms of its characteristics. The noise characteristics
are provided so the customer, service adviser and technician are all speaking the same language when
defining the noise.
 Squeak – (Like tennis shoes on a clean floor)
Squeak characteristics include the light contact/fast movement/brought on by road conditions/hard surfaces
= higher pitch noise/softer surfaces = lower pitch noises/edge to surface = chirping
 Creak – (Like walking on an old wooden floor)
Creak characteristics include firm contact/slow movement/twisting with a rotational movement/pitch depen-
dent on materials/often brought on by activity.
 Rattle – (Like shaking a baby rattle)
Rattle characteristics include the fast repeated contact/vibration or similar movement/loose parts/missing
clip or fastener/incorrect clearance.
 Knock – (Like a knock on a door)
Knock characteristics include hollow sounding/sometimes repeating/often brought on by driver action.
 Tick – (Like a clock second hand)
Tick characteristics include gentle contacting of light materials/loose components/can be caused by driver
action or road conditions.
 Thump – (Heavy, muffled knock noise)
Thump characteristics include softer knock/dead sound often brought on by activity.
 Buzz – (Like a bumble bee)
Buzz characteristics include high frequency rattle/firm contact.
 Often the degree of acceptable noise level will vary depending upon the person. A noise that a technician
may judge as acceptable may be very irritating to the customer.
 Weather conditions, especially humidity and temperature, may have a great effect on noise level.
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 the repair is reconfirmed.
SBT842

SQUEAK AND RATTLE TROUBLE DIAGNOSES
DLK-183
< SYMPTOM DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
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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.
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 is are suspected to be the cause of the noise.
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 is are suspected to be the cause of the noise.
Do not tap or push/pull the component with excessive force, otherwise the noise will be eliminated only tem-
porarily.
 Feeling for a vibration by hand by touching the component(s) that is are suspected to be the cause of the
noise.
 Placing a piece of paper between components that is are suspected to be the cause of the noise.
 Looking for loose components and contact marks.
Refer to DLK-184, "
Inspection Procedure".
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. These insulators are available through the authorized Nissan Parts Department.
CAUTION:
Never use excessive force as many components are constructed of plastic and may be damaged.
NOTE:
 URETHANE PADS
Insulates connectors, harness, etc.
 INSULATOR (Foam blocks)
Insulates components from contact. Can be used to fill space behind a panel.
 INSULATOR (Light foam block)
 FELT CLOTHTAPE
Used to insulate where movement does not occur. Ideal for instrument panel applications.
The following materials, not available through NISSAN Parts Department, can also be used to repair
squeaks and rattles.
 UHMW(TEFLON) TAPE
Insulates where slight movement is present. Ideal for instrument panel applications.
 SILICONE GREASE
Used in place of UHMW tape that is be visible or does not fit.
Note: Will only last a few months.
 SILICONE SPRAY
Used when grease cannot be applied.
 DUCT TAPE
Used to eliminate movement.
CONFIRM THE REPAIR
Confirm that the cause of a noise is repaired by test driving the vehicle. Operate the vehicle under the same
conditions as when the noise originally occurred. Refer to the notes on the Diagnostic Worksheet.

SQUEAK AND RATTLE TROUBLE DIAGNOSES
DLK-185
< SYMPTOM DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
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SEATS
When isolating seat noise it is important to note the position the seat is in and the load placed on the seat
when the noise occurs. 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 noises 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.

DLK-192
< ON-VEHICLE REPAIR >[WITH INTELLIGENT KEY SYSTEM]
HOOD
HOOD ASSEMBLY : Removal and Installation
INFOID:0000000003813384
CAUTION:
Operate with two workers, because of its heavy weight.
REMOVAL
1. Remove hood insulator.
2. Remove washer nozzle and washer tube. Refer to WW-102, "
Removal and Installation".
3. Support hood assembly with a proper material to prevent it from falling.
WARNING:
Bodily injury may occur if no supporting rod is holding the hood open when removing the hood
stay.
4. Remove hood hinge mounting nuts on the hood to remove the hood assembly.
5. Remove the following parts after removing the hood assembly.
 Radiator core seal
 Hood bumper rubber (lower, side)
 Hood seal (front)
1. Hood assembly 2. Hood bumper rubber 3. Hood lock assembly
4. Hood hinge 5. Front bumper fascia 6. Front combination lamp
7. Front fender
Refer to GI-4, "
Components" for symbols in the figure.
JMKIA2391GB

HOOD
DLK-195
< ON-VEHICLE REPAIR >[WITH INTELLIGENT KEY SYSTEM]
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HOOD SUPPORT ROD : Exploded ViewINFOID:0000000003819556
HOOD SUPPORT ROD : Removal and InstallationINFOID:0000000003813389
REMOVAL
1. Support hood assembly with a proper material to prevent it from falling.
WARNING:
Bodily injury may occur if no supporting rod is holding the hood open when removing the hood
support rod.
2. Pull hood support rod from grommet and remove.
INSTALLATION
Install in the reverse order of removal.
1. Hood insulator 2. Hood hinge (RH/LH) 3. Hood seal (front) (RH/LH)
4. Radiator core seal 5. Grommet 6. Hood support rod
7. Clamp 8. Hood assembly 9. Hood bumper rubber (lower) (RH/
LH)
10. Hood bumper rubber (side) (RH/LH)
Refer to GI-4, "
Components" for symbols in the figure.
JMKIA2380ZZ

RADIATOR CORE SUPPORT
DLK-197
< ON-VEHICLE REPAIR >[WITH INTELLIGENT KEY SYSTEM]
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13. Disconnect connector of refrigerant pressure sensor. Refer to HA-50, "Exploded View".
14. Remove mounting bolt, and then remove engine coolant reservoir tank. Refer to CO-13, "
Exploded View".
15. Remove mounting bolts, and then disconnect condenser pipe assembly. Refer to HA-48, "
Exploded
View".
16. Remove condenser. Refer to HA-46, "
Removal and Installation".
17. Remove mounting nut of radiator upper hose from radiator core support, and then remove radiator upper
hose and hood switch bracket. Refer to CO-25, "
Exploded View".
18. Disconnect radiator upper hose from radiator pipe (upper). Refer to CO-25, "
Exploded View".
19. Disconnect radiator lower hose (3). Refer to CO-25, "
Exploded View".
20. Disconnect CVT fluid cooler hose on radiator side. Refer to TM-165, "
Exploded View" (CVT: RE0F09B) or
TM-329, "
Exploded View" (CVT: RE0F10A).
21. Remove power steering oil cooler pipe from radiator core sup-
port at point shown by arrows in the figure.
22. Disconnect connectors of the following parts.
 Cooling fan (RH/LH). Refer to CO-16, "
Exploded View".
 Crash zone sensor. Refer to SR-18, "
Removal and Installation".
23. Remove radiator upper clip. Refer to CO-13, "
Exploded View".
24. Remove all harness clips from radiator core support.
CAUTION:
Never damage radiator.
25. Support hood assembly with a proper material to prevent it from falling.
WARNING:
Bodily injury may occur if no supporting rod is holding the hood open when removing the hood
stay.
26. Remove hood support rod. Refer to DLK-195, "
HOOD SUPPORT ROD : Removal and Installation".
27. Remove mounting bolts, and then remove radiator core support.
CAUTION:
 Operate with two workers, because of its heavy weight.
 Never damage power steering oil cooler pipe.
28. Remove the following parts after removing radiator core support.
 Radiator lower hose, radiator upper hose, radiator pipe. Refer to CO-25, "
Exploded View".
 Radiator. Refer to CO-13, "
Exploded View".
 Cooling fan (RH/LH). Refer to CO-16, "
Exploded View".
 Crash zone sensor. Refer to SR-18, "
Exploded View".
 Power steering oil cooler pipe clip. Refer to ST-34, "
Exploded View".
INSTALLATION
Install in the reverse order of removal.
JMKIA2395ZZ
: harness clip
JMKIA2396ZZ