Nissan Pathfinder. Manual - part 1004

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< ECU DIAGNOSIS INFORMATION >

CLIMATE CONTROLLED SEAT CONTROL UNIT

Fail-safe

INFOID:0000000009176464

• Climate controlled seat control unit equips fail-safe function.

• When a malfunction occurs in the systems shown as per the following, climate controlled seat control unit

stops output.

25

G

Seatback thermal electric de-
vice power supply (COOL)

Output

Ignition switch 
ON or START

Climate controlled 
seat switch select

COOL Battery 

voltage

HEAT

0V

OFF

0V

26

LG

Seat cushion thermal electric 
device power supply (COOL)

Output

Ignition switch 
ON or START

Climate controlled 
seat switch select

COOL Battery 

voltage

HEAT

0V

OFF

0V

27

L

Seat cushion thermal electric 
device power supply (HEAT)

Output

Ignition switch 
ON or START

Climate controlled 
seat switch select

HEAT

Battery voltage

COOL

0V

OFF

0V

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W

Seatback thermal electric de-
vice power supply (HEAT)

Output

Ignition switch 
ON or START

Climate controlled 
seat switch select

HEAT

Battery voltage

COOL

0V

OFF

0V

29

R

Battery power supply

Input

Ignition switch ON

Battery voltage

30

B

Ground

—

—

0V

Terminal

Wire

color

Item

Signal

Input/

Output

Condition

Voltage

(Approx.)

Malfunction

Malfunctioning condition

The temperature difference between the seatback ther-
mal electric device and seat cushion thermal electric de-
vice is 30

°C (86°F) or more

• When it detects for 4 seconds that the temperature difference between 

the seatback thermal electric device and seat cushion thermal electric 
device is 30

°C (86°F) or more, stops the output to the thermal electric de-

vice, activates the climate controlled seat blower motor in the maximum 
position, and sends the external airflow for 30 seconds.

• If the temperature difference is still 30

°C (86°F) or more after 30 seconds 

pass, it stops all output and enters the system OFF condition.

• When the temperature difference between seatback thermal electric de-

vice and seat cushion thermal electric device becomes 20

°C (68°F) or 

less, the system recovers automatically.

• If it detects that the temperature difference is 30

°C (86°F) or more after 

the automatic system recovery, it immediately stops all output and enters 
the system OFF condition.
NOTE:
When the switch operation is performed before entering the system OFF 
condition, the fail-safe mode is reset.

The temperature of thermal electric device is 110

°C 

(230

°F) or more in the HEAT mode (any thermal electric 

device in the seatback or seat cushion)

• When it detects for 4 seconds that the temperature of the thermal electric 

device is 110

°C (230°F) or more, stops the output to the thermal electric 

device, activates the climate controlled seat blower motor in the maxi-
mum position, and sends the external airflow for 30 seconds.

• If the temperature does not become 105

°C (221°F) or less after 30 sec-

onds pass, it stops all output and enters the system OFF condition.

• When the temperature of the thermal electric device becomes 105

°C 

(221

°F) or less, the system recovers automatically.

• If it detects that the temperature of the thermal electric device is 110

°C 

(230

°F) or more after the automatic system recovery, it immediately 

stops all output and enters the system OFF condition.

CLIMATE CONTROLLED SEAT CONTROL UNIT

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< ECU DIAGNOSIS INFORMATION >

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*: System voltage is the voltage between climate controlled 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.

The temperature of the thermal electric device is 45

°C 

(113

°F) or more in the COOL mode (any thermal electric 

device in the seatback or seat cushion)

• When it detects for 4 seconds that the temperature of the thermal electric 

device is between 45

°C (113°F) and 70°C (158°F), it starts the tempera-

ture monitoring of the thermal electric device at 3 second intervals.

• While monitoring, if it detects that the temperature raises 2

°C (36°F) or 

more 4 times continuously or reaches 70

°C (158°F) or more, it stops all 

output and enters the system OFF condition.

• If it detects other results of monitoring, it continues activating in the 

COOL mode.

Thermal electric device sensor system open circuit

• When it detects for 4 seconds that the thermal electric device sensor sys-

tem is an open circuit.

Climate controlled seat blower motor system open circuit

• When it detects for 2 seconds that climate controlled seat blower motor 

system is an open circuit while the climate controlled seat is being acti-
vated, it stops output to the thermal electric device.

• When it detects for 10 seconds that the climate controlled seat blower 

motor system is an open circuit while the climate controlled seat is being 
activated, it stops all output and enters the system OFF condition.
NOTE:
After detecting the climate seat blower motor system open circuit for 2 
seconds, the system recovers automatically if the activation of the cli-
mate controlled seat blower motor is detected for 1 second or more.

Switch input out of the specified range

• When it detects for 4 seconds that the rotary switch input is 30% or less 

of the vehicle battery voltage, it stops all output and enters the system 
OFF condition.

• When the switch input returns to a value within the specified range, the 

system recovers automatically.

HEAT or COOL switch input out of the specified range

• When it detects for 4 seconds that rotary switch input is 6% or less of the 

vehicle battery voltage, it stops all output and enters the system OFF 
condition.

• When the switch input returns to a value within the specified range, the 

system recovers automatically.

System voltage out of range

• System voltage* of the climate controlled seat control unit is out of the 

operation range (8.5 V – 16.5 V).

Malfunction

Malfunctioning condition

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< WIRING DIAGRAM >

POWER SEAT FOR DRIVER SIDE WITHOUT AUTOMATIC DRIVE POSITIONER

WIRING DIAGRAM

POWER SEAT FOR DRIVER SIDE WITHOUT AUTOMATIC DRIVE POSI-
TIONER

Wiring Diagram

INFOID:0000000009176465

ABJWA0352GB

POWER SEAT FOR DRIVER SIDE WITHOUT AUTOMATIC DRIVE POSITIONER

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< WIRING DIAGRAM >

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ABJIA0830GB