ECU NISSAN TEANA 2008 Service Manual

VENTILATION SEAT CONTROL UNIT
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LH:(O/B)
RH:(BR/W)Ground Ventilation seat HI indictor signal OutputVentilation seat HI indica-
torIlluminate 3 V
Other than
aboveBattery voltage
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LH:(O/L)
RH:(BR/Y)Ground Ventilation seat LO indictor signal OutputVentilation seat LO indi-
catorIlluminate 3 V
Other than
aboveBattery voltage
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LH:(P/L)
RH:(G/Y)Ground Heated seat switch HI signal Input Heated seat switch HIPressed 0 V
Other than
aboveBattery voltage
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LH:(P/B)
RH:(G/R)Ground Heated seat switch LO signal Input Heated seat switch LOPressed 0 V
Other than
aboveBattery voltage
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LH:(GR/R)
RH:(LG/B)Ground Heated seat HI indictor signal Output Heated seat HI indicatorIlluminate 3 V
Other than
aboveBattery voltage
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LH:(GR/L)
RH:(LG/R)Ground Heated seat LO indictor signal Output Heated seat LO indicatorIlluminate 3 V
Other than
aboveBattery voltage
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(B/W)Ground Ventilation motor ground — Ignition switch ON 0 V
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LH:(L/B)
RH:(Y/R)GroundVentilation motor speed control
signal
(seatback)Output Ventilation seatLO mode 7 V
HI mode 8.8 V
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LH:(L/W)
RH:(Y/B)GroundVentilation motor power supply
(seatback)Output Ventilation seatLO mode Battery voltage
HI mode Battery voltage
Other than
above0 V
58
LH:(G/W)
RH:(W)Ground Heated seat power supply Output Heated seatLO mode Battery voltage
HI mode Battery voltage
Other than
above0 V
59
LH:(G/B)
RH:(W/B)GroundGround
(Heated seat HI mode)— Heated seatLO mode 6.5 V
HI mode 0 V
Other than
above0 V
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LH:(G)
RH:(W/G)GroundHeated seat HI mode power sup-
ply
Output
Heated seatLO mode 0 V
Heated seat LO mode ground —HI mode Battery voltage
Other than
above0 V
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LH:(L/Y)
RH:(Y/L)GroundVentilation motor speed control
signal
(seat cushion)Output Ventilation seatLO mode 7 V
HI mode 10 V
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LH:(L/R)
RH:(Y/G)GroundVentilation motor power supply
(seat cushion)Output Ventilation seatLO mode Battery voltage
HI mode Battery voltage
Other than
above0 V Te r m i n a l N o .
(Wire color)Description
ConditionVa l u e
(Approx.)
(+) (–) Signal nameInput/
Output

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VENTILATION SEAT CONTROL UNIT
ECU DIAGNOSIS
VENTILATION SEAT CONTROL UNIT
REAR SEAT
REAR SEAT : Wiring Diagram - REAR
H E AT E D S E AT A N D V E N T I L AT I O N S E AT
SYSTEM -
INFOID:0000000003940344
JCJWA0643GB

VENTILATION SEAT CONTROL UNIT
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JCJWM0298GB

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VENTILATION SEAT CONTROL UNIT
JCJWA0644GB

VENTILATION SEAT CONTROL UNITSE-65
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JCJWA0645GB

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VENTILATION SEAT CONTROL UNIT
JCJWA0646GB

VENTILATION SEAT CONTROL UNITSE-67
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REAR SEAT : Fail-safeINFOID:0000000003940345
 The ventilation seat control unit is equipped with the fail-safe function.
 When a malfunction occurs in the system as per the follo wing, the ventilation seat control unit stops all out-
puts. The system enters in the system turns OFF position.
JCJWA0647GB

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VENTILATION SEAT CONTROL UNIT
*: System voltage is the voltage between ventilation seat control unit power source and the ground.
NOTE:
When the system enters in the fail-safe mode again after performing resetting procedure, perform diagnosis. Malfunction Malfunctioning condition Reset procedure
Ventilation motor system open circuitIn ventilation seat mode, ventilation motor
system open circuit is detected for 10 seconds
or moreTurn OFF key switch and turn ON key
switch again. System is reset
Ventilation motor system short circuitIn ventilation seat mode, heater unit system
short circuit is detected for 0.2 seconds or
moreTurn OFF key switch and turn ON key
switch again. System is reset
Heater unit system open circuitIn heated seat LO mode, heater unit system
open circuit is detected for 0.1 seconds or
moreTurn OFF key switch and turn ON key
switch again. System is reset
Heater unit system short circuitIn heated seat LO mode, heater unit system
short circuit is detected for 0.1 seconds or
moreTurn OFF key switch and turn ON key
switch again. System is reset
System voltage out of rangeSystem voltage* of ventilation seat control unit
is out of operation range (8.5 V - 16.5 V) When system voltage* returns within nor-
mal range after more than 0.5 seconds,
system recovers
 When recovering, system returns to the
same status as previous

SQUEAK AND RATTLE TROUBLE DIAGNOSES
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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 SE-82, "
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.

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SQUEAK AND RATTLE TROUBLE DIAGNOSES
Inspection Procedure
INFOID:0000000003940144
Refer to Table of Contents for specific component removal and installation information.
INSTRUMENT PANEL
Most incidents are caused by contact and movement between:
1. Cluster lid A and instrument panel
2. Acrylic lens and combination meter housing
3. Instrument panel to front pillar garnish
4. Instrument panel to windshield
5. Instrument panel mounting pins
6. Wiring harnesses behind the combination meter
7. A/C defroster duct and duct joint
These incidents can usually be located by tapping or moving the components to duplicate the noise or by
pressing on the components while driving to stop the noise. Most of these incidents can be repaired by apply-
ing felt cloth tape or silicon spray (in hard to reach areas). Urethane pads can be used to insulate wiring har-
ness.
CAUTION:
Never use silicone spray to isolate a squeak or rattle. If the area is saturated with silicone, the recheck
of repair becomes impossible.
CENTER CONSOLE
Components to pay attention to include:
1. Shifter assembly cover to finisher
2. A/C control unit and cluster lid C
3. Wiring harnesses behind audio and A/C control unit
The instrument panel repair and isolation procedures also apply to the center console.
DOORS
Pay attention to the following:
1. Finisher and inner panel making a slapping noise
2. Inside handle escutcheon to door finisher
3. Wiring harnesses tapping
4. Door striker out of alignment causing a popping noise on starts and stops
Tapping or moving the components or pressing on them while driving to duplicate the conditions can isolate
many of these incidents. The areas can usually be insulated with felt cloth tape or insulator foam blocks to
repair the noise.
TRUNK
Trunk noises are often caused by a loose jack or loose items put into the trunk by the customer.
In addition look for the following:
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.