Infiniti M35/M45 Y50. Manual - part 1082

CLIMATE CONTROLLED SEAT

SE-125

C

D

E

F

G

H

J

K

L

M

A

B

SE

Work Flow

NIS0027M

1.

Check the symptom and customer's requests.

2.

Understand the outline of system. Refer to 

SE-114, "System Description"

 .

3.

Perform the preliminary check. Refer to

SE-126, "Preliminary Check"

 .

4.

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

SE-126,

"Trouble Diagnoses Symptom Chart"

 .

5.

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

6.

INSPECTION END.

23

L/R

Seatback thermal electric device 
sensor signal

Input

Blower motor operated

0.5 – 4

Ignition switch OFF

0

24

L

Seatback thermal electric device 
sensor ground

—

Ignition switch ON

0

Ter-

minal

Wire 

Color

Item

Signal

Input/

Output

Condition

Voltage (V)

(Approx)

SE-126

CLIMATE CONTROLLED SEAT

Trouble Diagnoses Symptom Chart

NIS0027O

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.

●

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

°

C (68

°

F) or more of mutual differences of tem-

perature.

Preliminary Check

NIS0027N

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.

Symptom

Diagnoses / service procedure

Refer to 

page

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

1. Check climate controlled seat control unit power supply 
circuit 

SE-127

All the driver side or passenger side climate controlled seat 
do not operate.

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

SE-128

2. Check climate controlled seat switch power supply circuit 

SE-131

3. Check climate controlled seat blower motor circuit 

SE-141

4. Replace climate controlled seat control unit

SE-114

Climate controlled seat blower motor speed cannot adjust.

1. Check climate controlled seat switch power supply circuit 

SE-131

2. Check climate controlled seat switch circuit 

SE-132

3. Check climate controlled seat control unit 

SE-143

4. Replace climate controlled seat blower motor

SE-114

The climate controlled seat dose not operates when the 
switch is done in HEAT or COOL.

Check climate controlled seat switch circuit 

SE-132

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-138

2. Check seat cushion thermal electric device circuit 

SE-136

3. Check seatback thermal electric device sensor circuit

SE-140

4. Check seatback thermal electric device circuit 

SE-137

5. Check climate controlled seat blower motor circuit

SE-141

6. Replace Climate controlled seat control unit

SE-114

The climate controlled seat switch indicator do not operated 
with HEAT or COOL position

Check climate controlled seat switch indicator circuit 

SE-134

CLIMATE CONTROLLED SEAT

SE-127

C

D

E

F

G

H

J

K

L

M

A

B

SE

Check Climate Controlled Seat Control Unit Power Supply Circuit 

NIS0027P

1. 

CHECK FUSE 

Check 10A fuse [No. 12, located in fuse block (J/B)]
NOTE:
Refer to 

SE-114, "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-

3, "POWER SUPPLY ROUTING CIRCUIT"

 .

2. 

CHECK CLIMATE CONTROLLED SEAT RELAY POWER SUPPLY CIRCUIT

1.

Disconnect climate controlled seat relay connector.

2.

Turn ignition switch ON.

3.

Check voltage between climate controlled seat relay harness
connector 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

Check continuity climate controlled seat relay.

OK or NG

OK

>> GO TO 4.

NG

>> Replace climate controlled seat relay.

Terminal

Voltage (V)

(Approx.)

(+)

(–)

Climate controlled 

seat relay connector

Terminal 

E16

2 Ground

Battery 

voltage

PIIB6067E

Climate controlled  

seat relay connector

Terminal Condition

Continuity 

E16

3

5

12V direct current 

supply between

 terminals 1and 2

Yes

No current supply

No

6

7

12V direct current 

supply between 

terminals 1and 2

Yes

No current supply

No

SEC202B

SE-128

CLIMATE CONTROLLED SEAT

4. 

CHECK CLIMATE CONTROLLED SEAT RELAY GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Check continuity between climate controlled seat relay connec-
tor and ground.

OK or NG

OK

>> Check the condition of the harness and connector.

NG

>> Repair or replace harness between climate controlled

seat relay and ground.

Check Climate Controlled Seat Control Unit Power Supply and Ground Circuit 

NIS0027Q

1. 

CHECK CLIMATE CONTROLLED SEAT CONTROL UNIT POWER SUPPLY CIRCUIT

1.

Disconnect climate controlled seat control unit 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 6.

NG

>> GO TO 2.

2. 

CHECK FUSE 

●

Check 15A fuse [No. 42, located in fuse, fusible link and relay unit] (Driver side)

●

Check 15A fuse [No. 41, located in fuse, fusible link and relay unit] (Passenger side)

NOTE:
Refer to 

SE-114, "Component Parts and Harness Connector Location"

 .

OK or NG

OK

>> GO TO 3.

NG

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

PG-

3, "POWER SUPPLY ROUTING CIRCUIT"

 .

Terminal

Continuity 

Climate controlled 

seat relay connector

Terminal

Ground

E16

1 Yes

PIIB6068E

Terminal

Voltage (V)

(Approx.)

(+)

(–)

Climate controlled  seat 

control unit  connector

Terminal 

B284

(driver side)

B294

(passenger side)

2

Ground

Battery voltage

4

PIIB6069E