Content .. 1011 1012 1013 1014 ..

Nissan Maxima. Manual - part 1013

CLIMATE CONTROLLED SEAT CONTROL UNIT

SE-25

< ECU DIAGNOSIS INFORMATION >

[WITH CLIMATE CONTROLLED SEATS]

ECU DIAGNOSIS INFORMATION

CLIMATE CONTROLLED SEAT CONTROL UNIT

Reference Value

INFOID:0000000010049485

TERMINAL LAYOUT

PHYSICAL VALUES

AWJIA0387ZZ

Terminal

Wire

color

Item

Signal

Input/

Output

Condition

Voltage

(Approx.)

HEAT switch signal

Input

Ignition switch
ON or START

Climate controlled
seat switch select

HI HEAT

2.6V – 3.5V

MED HEAT

1.6V – 2.5V

LO HEAT

0.5V – 1.5V

OFF

Blower motor speed control
signal

Input

Ignition switch
ON or START

Climate controlled
seat switch select

HEAT or

COOL

4.5V – 8.0V

OFF

Blower motor ground

—

Blower motor power supply

Input

Ignition switch ON or START

Battery voltage

COOL switch signal

Input

Ignition switch
ON or START

Climate controlled
seat switch select

HI COOL

2.6V – 3.5V

MED COOL

1.6V – 2.5V

LO COOL

0.5V – 1.5V

OFF

G/B

Seat cushion thermal electric
device sensor ground

—

Ignition switch ON

G/R

Seat cushion thermal electric
device sensor signal

Input

Blower motor operated

0.5V – 4.0V

Ignition switch OFF

G/Y

Seatback thermal electric de-
vice sensor ground

—

Ignition switch ON

Seatback thermal electric de-
vice sensor signal

Input

Blower motor operated

0.5V – 4.0V

Ignition switch OFF

COOL switch indicator signal

Output

Ignition switch
ON or START

Climate controlled
seat switch select

COOL

Battery voltage

OFF

HEAT switch indicator signal

Output

Ignition switch
ON or START

Climate controlled
seat switch select

HEAT Battery

voltage

OFF

GR/W

Ignition switch power supply

Input

Ignition switch ON or START

Battery voltage

Climate controlled seat switch
power supply

Input

Ignition switch ON or START

Battery voltage

SE-26

< ECU DIAGNOSIS INFORMATION >

[WITH CLIMATE CONTROLLED SEATS]

CLIMATE CONTROLLED SEAT CONTROL UNIT

Fail-safe

INFOID:0000000010049486

• 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.

Seatback thermal electric de-
vice power supply (COOL)

Output

Ignition switch
ON or START

Climate controlled
seat switch select

COOL Battery

voltage

HEAT

OFF

Y/B

Seat cushion thermal electric
device power supply (COOL)

Output

Ignition switch
ON or START

Climate controlled
seat switch select

COOL Battery

voltage

HEAT

OFF

L/O

Seat cushion thermal electric
device power supply (HEAT)

Output

Ignition switch
ON or START

Climate controlled
seat switch select

HEAT

Battery voltage

COOL

OFF

Seatback thermal electric de-
vice power supply (HEAT)

Output

Ignition switch
ON or START

Climate controlled
seat switch select

HEAT

Battery voltage

COOL

OFF

GR/W

Battery power supply

Input

Ignition switch ON or OFF

Battery voltage

GR/B

Ground

—

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

SE-27

< ECU DIAGNOSIS INFORMATION >

[WITH CLIMATE CONTROLLED SEATS]

*: 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

SE-28

< WIRING DIAGRAM >

[WITH CLIMATE CONTROLLED SEATS]

POWER SEAT FOR DRIVER SIDE

WIRING DIAGRAM

POWER SEAT FOR DRIVER SIDE

Wiring Diagram - Without Automatic Drive Positioner

INFOID:0000000010049487

ABJWA0372GB

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