Infiniti Q45. Manual - part 852

CLIMATE CONTROLLED SEAT

SE-163

C

D

E

F

G

H

J

K

L

M

A

B

SE

Terminal and Reference Value for Climate Controlled Seat Control Unit

NIS0014Z

Ter-

minal

Wire 

Color

Item

Signal 

input/output

Condition

Voltage (V)

(Approx)

JB

W/G

Ignition switch power supply

Input

Ignition switch ON or START

Battery voltage

JC

B

Ground

—

—

0

JD

W/R

Ignition switch power supply

Input

Ignition switch ON or START

Battery voltage

J1

Y/G

Seat cushion thermal electric 
device power supply (HEAT)

Input

Ignition switch 
ON or START

Climate controlled seat switch 
select “HEAT”

0 – Battery 

voltage

Climate controlled seat switch 
select “OFF”

0

J2

W/L

Seat cushion thermal electric 
device power supply (COOL)

Input

Ignition switch 
ON or START

Climate controlled seat switch 
select “COOL”

0 – Battery 

voltage

Climate controlled seat switch 
select “OFF”

0

J3

GY

Ground

—

—

0

J4

G

“HEAT” switch indicator signal

Output

Ignition switch 
ON or START

Climate controlled seat switch 
select “HEAT”

Battery voltage

Climate controlled seat switch 
select “OFF”

0

J5

OR

“COOL” switch indicator signal

Output

Ignition switch 
ON or START

Climate controlled seat switch 
select “COOL”

Battery voltage

Climate controlled seat switch 
select “OFF”

0

J6

PU

“HEAT” switch signal

Input

Ignition switch 
ON or START

Climate controlled seat switch 
select “HEAT”

0

Climate controlled seat switch 
select “OFF”

Battery voltage

J7

L

Temperature dial power supply

Input

Ignition switch 
ON or START

temperature dial 1 – 4

7.1 – 11.4

Ignition switch OFF

0

J10

PU

Blower motor power supply

Input

Ignition switch 
ON or START

Climate controlled seat switch 
select “HEAT” or “COOL”
temperature dial 1 – 4

5.5 – Battery 

voltage

Climate controlled seat switch 
select “OFF”

Battery voltage

Ignition switch OFF

0

J11

B/R

Seatback thermal electric 
device power supply (HEAT) 

Input

Ignition switch 
ON or START

Climate controlled seat switch 
select “HEAT”

0 – Battery 

voltage

Climate controlled seat switch 
select “OFF”

0

J12

PU/W

Seatback thermal electric 
device power supply (COOL) 

Input

Ignition switch 
ON or START

Climate controlled seat switch 
select “COOL”

0 – Battery 

voltage

Climate controlled seat switch 
select “OFF”

0

J13

R

Blower motor speed control 
signal 

Input

Ignition switch 
ON or START

Climate controlled seat switch 
select “HEAT” or “COOL”
temperature dial 1 – 4

4.5 – 9.5

Climate controlled seat switch 
OFF

0

J14

W

Blower motor tachometer 
signal

Output

Ignition switch 
ON or START

Climate controlled seat switch 
select “HEAT” or “COOL”

5 – 7

Climate controlled seat switch 
select “OFF”

Battery voltage

SE-164

CLIMATE CONTROLLED SEAT

Work Flow

NIS00150

1.

Check the symptom and customer's requests.

2.

Understand the outline of system. Refer to 

SE-154, "System Description"

 .

3.

Perform the preliminary check. Refer to

SE-164, "Preliminary Check"

 .

4.

According to the trouble diagnosis chart, repair or replace the cause of the malfunction. Refer to 

SE-165,

"Trouble Diagnoses Symptom Chart"

 .

5.

Does climate controlled seat operate normally? YES: GO TO 6, NO: GO TO 4.

6.

INSPECTION END.

Preliminary Check

NIS00151

1. 

CHECK DUCT AND FILTER

Check the following.

●

Is that there no foreign body in the blower motor filter.

●

Is that there no foreign body in the duct.

OK or NG

OK

>> Preliminary check is OK.

NG

>> The foreign body is removed.

J15

Y

Temperature dial signal

Input

Ignition switch 
ON or START

temperature dial 1 – 4

0 – 5

Ignition switch OFF

0

J16

R

“COOL” switch signal

Input

Ignition switch 
ON or START

Climate controlled seat switch 
select “COOL”

0

Climate controlled seat switch 
select “OFF”

Battery voltage

J17

B/R

Seat cushion thermal electric 
device sensor ground

—

Ignition switch ON

0 

J18

G/R

Seat cushion thermal electric 
device sensor signal

Input

Ignition switch ON or START

0.5 – 4

Ignition switch OFF

0

J19

L/OR

Seatback thermal electric 
device sensor signal

Input

Ignition switch ON or START

0.5 – 4

Ignition switch OFF

0

J20

R/L

Seatback thermal electric 
device sensor ground

Input

Ignition switch ON

0

Ter-

minal

Wire 

Color

Item

Signal 

input/output

Condition

Voltage (V)

(Approx)

CLIMATE CONTROLLED SEAT

SE-165

C

D

E

F

G

H

J

K

L

M

A

B

SE

Trouble Diagnoses Symptom Chart

NIS00152

NOTE:
Make sure other systems using the signal of the following systems operate normally.

NOTE:

●

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

●

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.

Symptom

Diagnoses / service procedure

Refer to page

Climate controlled seat do not operate 
(Neither the driver' s side nor passenger's side operate).

Check climate controlled seat relay power supply circuit 

SE-166

All the driver side climate controlled seat do not operate 
(Passenger side operates).

1. Check driver side climate controlled seat control unit 
power supply and ground circuit 

SE-167

2. Check climate controlled seat temperature dial circuit 

SE-173

3. Check climate controlled seat switch ground circuit 

SE-174

4. Check blower motor power supply circuit 

SE-178

5. Replace blower motor assembly

–

All the passenger side climate controlled seat do not 
operate (Driver side operates)

1. Check passenger side climate controlled seat control 
unit power supply and ground circuit 

SE-168

2. Check climate controlled seat temperature dial circuit 

SE-173

3. Check climate controlled seat switch ground circuit 

SE-174

4. Check blower motor power supply circuit 

SE-178

5. Replace blower motor assembly

–

Blower motor speed cannot adjust.

1. Check climate controlled temperature dial 

SE-172

2. Check climate controlled seat control unit 

SE-181

3. Replace blower motor assembly

—

The climate controlled seat dose not operates when the 
switch is done in “HEAT” 
(The wind rises when the switch is in “COOL” mode).

Check climate controlled seat “HEAT” switch circuit 

SE-170

The climate controlled seat dose not operates when the 
switch is done in “COOL” 
(The wind rises when the switch is in “HEAT” mode).

Check climate controlled seat “COOL” switch circuit 

SE-171

When the climate controlled seat switch is turned on, 
operation stops at nose (When the climate controlled seat 
switch is in “HEAT” or “COOL” mode after ignition switch is 
turned ON again, the motor operates).

1. Check seat cushion thermal electric device sensor 
circuit 

SE-176

2. Check seat cushion thermal electric device circuit 

SE-175

3. Check seatback thermal electric device sensor circuit 

SE-178

4. Check seatback thermal electric device circuit 

SE-177

5. Check blower motor speed control circuit

SE-180

6. Check blower motor tachometer signal circuit

SE-180

7. Replace Climate controlled seat control unit

–

SE-166

CLIMATE CONTROLLED SEAT

Check Climate Controlled Relay Power Supply Circuit 

NIS00153

1. 

CHECK FUSE 

Check 10A fuse [No. 1, located in fuse block (J/B)]
NOTE:
Refer to

SE-153, "Component Parts and Harness Connector Location"

 .

OK or NG

OK

>> GO TO 2.

NG

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

PG-

2, "POWER SUPPLY ROUTING"

 .

2. 

CHECK SEAT RELAY POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect climate controlled seat relay connector.

3.

Turn ignition switch ON.

4.

Check voltage between climate controlled seat relay harness
connector B324 terminal 2 and ground.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace harness between fuse block (J/B) and

climate controlled seat relay.

3. 

CHECK CLIMATE CONTROLLED SEAT RELAY

1.

Turn ignition switch OFF.

2.

Remove climate controlled seat relay.

3.

Check continuity between terminals 3 and 5, 6 and 7.

OK or NG

OK

>> GO TO 4.

NG

>> Replace climate controlled seat relay.

Connector

Terminal

(Wire color)

Condition

Voltage (V)

(+)

(–)

B324

2 (W/G)

Ground

Turn ignition switch ON

 Battery voltage

Turn ignition switch OFF

0

PIIB2122E

Terminal

Condition

Continuity

3

5

12V direct current supply 
between terminals 1 and 2

Yes

No current supply

No

6

7

12V direct current supply 
between terminals 1 and 2

Yes

No current supply

No

SEC202B