Infiniti Q45. Manual - part 849

HEATED SEAT

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Check Rear Heated Seat Switch High Circuit

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1. 

CHECK REAR HEATER SWITCH POWER SUPPLY

1.

Turn ignition switch ON.

2.

Check voltage between rear power seat control unit connector
and ground.

OK or NG

OK

>> Rear heated seat HIGH circuit inspection is OK.

NG

>> When turn ignition switch ON and heater switch HIGH, check the following.

●

When voltage is approx. 0V, GO TO 2.

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When voltage is approx. 5V, GO TO 3.

2. 

CHECK REAR POWER SEAT SWITCH (HEATER SWITCH) HEATER HARNESS

1.

Turn ignition switch OFF.

2.

Disconnect rear power seat control unit connector.

3.

Check continuity between rear power seat control unit connector
B163 (LH), B363 (RH) terminal 22 and ground.

OK or NG

OK

>> Replace rear power seat control unit.

NG

>> Repair or replace harness between rear power seat con-

trol unit and rear power seat switch (heater switch).

3. 

CHECK REAR POWER SEAT SWITCH (HEATER SWITCH) HEATER HARNESS

1.

Turn ignition switch OFF.

2.

Disconnect rear power seat control unit connector and rear
power seat switch (heater switch) connector.

3.

Check continuity between rear power seat control unit connector
B163 (LH), B363 (RH) terminal 22 and rear power seat switch
(heater switch) connector D55 (LH), D75 (RH) terminal 5 (RH), 6
(LH).

OK or NG

OK

>> GO TO 4.

NG

>> Repair or replace harness between rear power seat control unit and rear power seat switch

(heater switch).

Connector

Terminal

(Wire color)

Condition

Voltage (V) 

(Approx.)

(+)

(–)

B163 (LH)

B363 (RH)

22 (L/W)

Ground

Turn ignition switch ON
Heater switch HIGH

0

Heater switch OFF

5

PIIA4047E

22 (L/W) 

−

 Ground

:Continuity should not exist

PIIB1750E

Rear seat LH

22 (L/W) 

−

 6 (Y/R)

:Continuity should exist

Rear seat RH

22 (L/W) 

−

 5 (L/W)

:Continuity should exist

PIIA4049E

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HEATED SEAT

4. 

CHECK REAR POWER SEAT SWITCH (HEATER SWITCH)

Check continuity between rear power seat switch (heater switch).

OK or NG

OK

>> Check the condition of the harness and connector.

NG

>> Replace front power seat switch (heater switch).

Check Rear Heated Seat Ground Circuit

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1. 

CHECK REAR SEATBACK HEATER HARNESS

1.

Turn ignition switch OFF.

2.

Disconnect rear power seat control unit connector.

3.

Check continuity between rear power seat control unit connector
B162 (LH), B362 (RH) terminal 8 and 15.

OK or NG

OK

>> Check the condition of the harness and connector.

NG

>> Replace rear power seat control unit.

Terminal

Condition

Continuity

5 (RH)

6 (LH)

2

Rear heater switch HIGH

Yes

Other than above

No

PIIA4046E

8 (OR) 

−

15 (B)

:Continuity should exist

PIIA4124E

CLIMATE CONTROLLED SEAT

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CLIMATE CONTROLLED SEAT

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Component Parts and Harness Connector Location

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PIIB7726E

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CLIMATE CONTROLLED SEAT

System Description

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The climate controlled seat system is controlled by climate controlled seat control unit. 
Heating and cooling are possible for a Thelma electric device (heat conversion machine).
NOTE:

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The climate controlled seat system is downed when the temperature sensor set as the seat cushion and
the seat back's thermal electric device machine detects 20 

°

C (68 

°

F)or more of mutual differences of tem-

perature.

●

In this case, by turning off ignition switch, system down is canceled and it can be reused by turning on
ignition switch again.

●

The climate controlled seat blower keep low speed for approximately 60 seconds after turning the temper-
ature switch or the dial.

CAUTION:

●

The thermal electric device has the character in which, as for an opposite side. one side becomes
high temperature at the time of low temperature.

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At the time of work, please turn OFF a switch, and carry it out after checking that the thermal elec-
tric device has got cold.

Power is at all times supplied

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through 15A fuse [No. 71, and 72, located in the fuse fusible link and relay unit] 

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to climate controlled seat relay terminals 5 and 7.

When the ignition switch turned to ON or START position,
Power is supplied

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through 10A fuse [No. 1, located in the fuse block (J/B)]

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to climate controlled seat relay terminal 2,and

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to climate controlled seat control unit (driver side and passenger side) terminal JD.

Then ground is supplied

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to climate controlled seat relay terminal 1,

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through body grounds E42, and E 62.

Then climate controlled seat relay is energized,
When climate controlled seat relay is turned to ON,
Power is supplied, 

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through climate controlled seat relay terminal 3,

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to driver side climate controlled seat control unit terminal JB.

When climate controlled seat relay is turned to ON,
Power is supplied, 

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through climate controlled seat relay terminal 6,

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to passenger side climate controlled seat control unit terminal JB.

When climate controlled switch select “HEAT”, ground is supply

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through climate controlled seat switch terminal J6,

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to climate controlled seat control unit terminal J6,

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through climate controlled seat switch terminal JCA, 

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through body grounds B17 and B57.

Then, the climate controlled control unit receives climate controlled switch “HEAT” signal.
When climate controlled switch select “COOL”, ground is supply

●

through climate controlled seat switch terminal J16,

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to climate controlled seat control unit terminal J16,

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through climate controlled seat switch terminal JCA, 

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through body grounds B17 and B57.

Then, the climate controlled control unit receives climate controlled switch “COOL” signal.
When the climate controlled seat control unit receives climate controlled seat switch signal, power is supply

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to climate controlled seat temperature dial terminal J7,

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through climate controlled seat control unit terminal J7.