Nissan Maxima. Manual - part 1008

DIAGNOSIS AND REPAIR WORK FLOW

SE-5

< BASIC INSPECTION >

[WITH CLIMATE CONTROLLED SEATS]

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Is malfunctioning part detected?

YES

>> GO TO 4.

NO

>> GO TO 2.

4.

REPAIR OR REPLACE THE MALFUNCTIONING PART

1. Repair or replace the malfunctioning part.

2. Reconnect parts or connectors disconnected during Diagnostic Procedure.

>> GO TO 5.

5.

FINAL CHECK

Refer to confirmed symptom in step 2, and make sure that the symptom is not detected.
Was the repair confirmed?

YES

>> Inspection End.

NO

>> GO TO 2.

SE-6

< SYSTEM DESCRIPTION >

[WITH CLIMATE CONTROLLED SEATS]

CLIMATE CONTROLLED SEAT SYSTEM

SYSTEM DESCRIPTION

CLIMATE CONTROLLED SEAT SYSTEM

System Diagram

INFOID:0000000010049459

System Description

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• The climate controlled seat system is controlled by the climate controlled seat control unit. 

• Operation of the climate controlled seat switch sends heated or cooled airflow and adjusts the seat tempera-

ture. 

SEAT CUSHION AND SEATBACK TEMPERATURE ADJUSTMENT FUNCTION

• A thermal electric device (TED) unit is installed in the seat cushion and seatback. The device heats or cools,

sends airflow to the seat surface, and adjusts the seat temperature.

• The thermal electric device (TED) is a heat exchanger that has a function to heat or cool the airflow from the

climate controlled seat blower motor. By changing the direction of the current from the power supply, the

device takes or gives heat, and adjusts the heat exchange process depending on voltage.

NOTE:

The climate controlled seat blower motor maintains low speed for approximately 60 seconds after turning the

climate controlled seat switch off.

CAUTION:

• The thermal electric device has a dual-climate function that allows one side to operate at a high tem-

perature and the other to operate at a low temperature simultaneously.

• Before starting work, always turn OFF the switch and check that the thermal electric device is cold.

FAIL-SAFE

The fail-safe function is adopted for the climate controlled seat control unit. Refer to 

SE-26, "Fail-safe"

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AWJIA0460GB

CLIMATE CONTROLLED SEAT SYSTEM

SE-7

< SYSTEM DESCRIPTION >

[WITH CLIMATE CONTROLLED SEATS]

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Component Parts Location

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Component Description

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1.

Climate controlled seat switch M302

2.

Climate controlled seat relay M58

3.

Seatback thermal electric device B218

4.

Seat cushion thermal electric device 
B219

5.

Climate controlled seat control unit 
B212, B216, B217

6.

Climate controlled seat blower motor 
B220

AWJIA0405ZZ

Item

Function

Climate controlled seat relay

Supplies power to the climate controlled seat control unit in accordance with the key switch 
position that is ON or OFF

Climate controlled seat control unit

Installed in the seat cushion backside and controls the climate controlled seat blower mo-
tor, seatback thermal electric device, and seat cushion thermal electric device in accor-
dance with the input signal

Climate controlled seat switch

Installed in the center console and transmits signals to climate controlled seat control unit 
in accordance with the HEAT (heated airflow) or COOL (cooled airflow) switch operation 
and the temperature switch operation

Climate controlled seat blower motor

Installed in the seat cushion backside and sends the airflow to the seatback thermal electric 
device and seat cushion thermal electric device in accordance with the control from the cli-
mate controlled seat control unit

Seatback thermal electric device

Installed in the seatback backside and heats or cools the airflow from the climate controlled 
seat blower motor in accordance with the control from the climate controlled seat control 
unit

Seat cushion thermal electric device

Installed in the seat cushion backside and heats or cools the airflow from the climate con-
trolled seat blower motor in accordance with the control from the climate controlled seat 
control unit

SE-8

< DTC/CIRCUIT DIAGNOSIS >

[WITH CLIMATE CONTROLLED SEATS]

POWER SUPPLY AND GROUND CIRCUIT

DTC/CIRCUIT DIAGNOSIS

POWER SUPPLY AND GROUND CIRCUIT

CLIMATE CONTROLLED SEAT CONTROL UNIT
CLIMATE CONTROLLED SEAT CONTROL UNIT : Diagnosis Procedure

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Regarding Wiring Diagram information, refer to 

SE-44, "Wiring Diagram"

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1.

CHECK FUSES

Check for blown fuses.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> If fuse or fusible link is blown, be sure to eliminate cause of malfunction before installing new fuse

or fusible link.

2.

CHECK BATTERY POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect climate controlled seat control unit connector B217.

3. Check voltage between climate controlled seat control unit con-

nector B217 terminal 29 and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 6.

3.

CHECK IGNITION POWER SUPPLY CIRCUIT

1. Disconnect climate controlled seat control unit connector B216.

2. Check voltage between climate controlled seat control unit con-

nector B216 terminal 21 and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 5.

4.

CHECK GROUND CIRCUIT

System component

Power Source

Fuse or Fusible Link

Location

Climate controlled seat control unit

Ignition switch ON or START

3 (10A)

Fuse block (J/B)

Battery

28 (15A)

Fuse and fusible link box

Battery

H (40A)

Fuse and fusible link box

Connector

Terminal

Ground

Voltage

(Approx.)

B217

29

—

Battery voltage

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Connector

Terminal

Ground

IgnitIon switch

Voltage

(Approx.)

B216

21

—

OFF

0V

ON

Battery voltage

START

Battery voltage

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