Infiniti M35/M45 Y50. Manual - part 1086

CLIMATE CONTROLLED SEAT

SE-141

C

D

E

F

G

H

J

K

L

M

A

B

SE

3. 

CHECK SEATBACK THERMAL ELECTRIC DEVICE SENSOR

Check resistance between seatback thermal electric device connec-
tor.

OK or NG

OK

>> Check the condition of the harness and the connector.

NG

>> Replace seatback thermal electric device.

Check Climate Controlled Seat Blower Motor Circuit

NIS0027Y

1. 

CHECK CLIMATE CONTROLLED SEAT BLOWER MOTOR CIRCUIT HARNESS

1.

Turn ignition switch OFF.

2.

Disconnect climate controlled seat control unit and climate controlled seat blower motor connector.

3.

Check continuity between climate controlled seat control unit
connector and climate controlled seat blower motor connector.

4.

Check continuity between climate controlled seat control unit connector and ground.

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace harness between climate controlled seat control unit and climate controlled seat

blower motor.

Seatback thermal  electric 

device  connector

Terminal 

Resistance

(K

Ω

)

(Approx.)

B220

(driver side)

B258

(passenger side)

1

2

2

PIIB6086E

A

B

Continuity 

Climate

 controlled seat 

control unit

connector

Terminal

Climate controlled 
seat blower motor 

connector

Terminal

B283 

(driver side) 

B293 

(passenger side)

7

B282

 (driver side) 

B292

 (passenger side)

3

Yes

14

2

17

4

18

1

A

Ground

Continuity 

Climate controlled seat 

control unit connector

Terminal

B283 

(driver side) 

B293 

(passenger side)

7

No

14

17

18

PIIB6089E

SE-142

CLIMATE CONTROLLED SEAT

2. 

CHECK CLIMATE CONTROLLED SEAT BLOWER MOTOR POWER SUPPLY CIRCUIT

1.

Connect climate controlled seat control unit connector and blower motor connector.

2.

Turn ignition switch ON.

3.

Check voltage between climate controlled seat control unit con-
nector  and ground.

OK or NG

OK

>> GO TO 3.

NG

>> Replace climate controlled seat control unit.

3. 

CHECK CLIMATE CONTROLLED SEAT BLOWER MOTOR SPEED CONTROL SIGNAL CIRCUIT

Check voltage between climate controlled seat control unit connec-
tor and ground.

OK or NG

OK

>> GO TO 4.

NG

>> Replace climate controlled seat control unit.

4. 

CHECK CLIMATE CONTROLLED SEAT BLOWER MOTOR TACHOMETER SIGNAL CIRCUIT

Check voltage between climate controlled seat control unit connec-
tor and ground.

OK or NG

OK

>> Climate controlled seat blower motor circuit is OK.

NG

>> Replace climate controlled seat blower motor.

Terminal

Voltage (V)

(Approx.)

(+)

(–)

Climate controlled seat 

control unit connector

Terminal 

B283 (driver side) 

B293 (passenger side)

14

Ground

Battery voltage

PIIB6090E

Terminal

Condition

Voltage (V)

(Approx.)

(+)

(–)

Climate 

controlled

 seat control 

unit connector

Terminal 

B283 

(driver side) 

B293

(passenger 

side)

17

Ground

Climate 
controlled 
seat switch

HEAT or 

COOL

4.5 - 8.0

Other than above.

0

PIIB6091E

Terminal

Condition

Voltage (V)

(Approx.)

(+)

(–)

Climate 

controlled

 seat control 

unit connector

Terminal 

B283 

(driver side) 

B293

(passenger 

side)

18

Ground

Climate 
controlled 
seat switch

HEAT or 

COOL

4.5 - 8.0

Other than above.

Battery 
voltage

PIIB6092E

CLIMATE CONTROLLED SEAT

SE-143

C

D

E

F

G

H

J

K

L

M

A

B

SE

Check Climate Controlled Seat Control Unit

NIS0027Z

1. 

CHECK THE CLIMATE CONTROLLED SEAT CONTROL UNIT

Does the heater operate normally when the driver side or passenger side climate controlled seat control unit is
exchanged?

YES or NO

YES

>> Climate controlled seat control unit is OK.

NO

>> Replace climate controlled seat control unit.

SE-144

HEATED SEAT

HEATED SEAT

PFP:87335

Component Parts and Harness Connector Location

NIS00280

System Description 

NIS00281

NOTE:

●

When handling seat, be extremely careful not to scratch heating unit 

●

To replace heating unit, seat trim and pad should be separated.

●

Do not use any organic solvent, such as thinner, benzene, alcohol, etc. to clean trims.

Power is all time supplied

●

to rear LH seat control unit and rear RH seat control unit terminal 1.

●

through 50A fusible link [Letter F, located in the fuse block (J/B)],

●

to IPDM E/R (heated seat relay) terminal 14.

●

through 15A fuse [No.38, located in the fuse block (J/B)].

With the ignition switch to ON or START position, power is supplied

●

to rear LH seat control unit terminal 4 and

●

to rear heated seat switch LH terminal 6.

●

through IPDM E/R (heated seat relay) terminal 12

●

to rear RH seat control unit terminal 4 and

●

to rear heated seat switch RH terminal 6

●

through IPDM E/R (heated seat relay) terminal 9.

1.

Fuse, fusible link and relay block (J/B)

2.

IPDM E/R E5, E6, E9

3.

Heated seat relay E5, E6, E9
(Built into the IPDM E/R)

4.

a: Rear heated seat switch LH B507
b: Rear heated seat switch RH B558

5.

Rear seat control unit
B303, B304 (LH)
B353, B354 (RH)
(View with the rear seatback 
removed)

PIIB5890E