Infiniti M45 (Y34). Manual - part 772

CLIMATE CONTROLLED SEAT

SE-109

C

D

E

F

G

H

J

K

L

M

A

B

SE

Trouble Diagnosis Symptom Chart

AIS002C4

●

Check that other systems using the signal of the following systems operate normally.

NOTE:

●

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

temperature.

Symptom

Diagnoses / service procedure

Refer to page

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

1. Climate controlled seat relay power supply 
circuit inspection

SE-110

Driver side climate controlled seat do not operate (Passenger 
side is operate).

1. Driver side climate controlled seat control 
unit power supply circuit inspection

SE-111

2. Climate controlled seat temperature dial cir-
cuit inspection

SE-117

3. Climate controlled seat switch ground circuit 
inspection

SE-119

4. Blower motor power supply circuit inspec-
tion

SE-124

5. Replace blower motor assembly

–

Passenger side climate controlled seat do not operate (Driver 
side is operate)

1. Passenger side climate controlled seat con-
trol unit power supply circuit inspection

SE-113

2. Climate controlled seat temperature dial cir-
cuit inspection

SE-117

3. Climate controlled seat switch ground circuit 
inspection

SE-119

4. Blower motor power supply circuit inspec-
tion

SE-124

5. Replace blower motor assembly

–

Blower motor speed cannot adjust.

1. Climate controlled temperature dial inspec-
tion

SE-117

2. Climate controlled seat control unit inspec-
tion

SE-126

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 made 
(“COOL”).

1. Climate controlled seat “HEAT” switch cir-
cuit inspection

SE-115

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

1. Climate controlled seat “COOL” switch cir-
cuit inspection

SE-116

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

1. Seat cushion Thermal electric device sensor 
circuit inspection

SE-121

2. Seat cushion Thermal electric device circuit 
inspection

SE-120

3. Seatback Thermal electric device sensor 
circuit inspection

SE-123

4. Seatback Thermal electric device circuit 
inspection

SE-122

5. Blower motor speed control circuit inspec-
tion

SE-125

6. Blower motor tachometer signal circuit 
inspection

SE-126

7. Replace Climate controlled seat control unit

–

SE-110

CLIMATE CONTROLLED SEAT

Climate Controlled Relay Power Supply Circuit Check

AIS002C5

1. 

CHECK FUSE 

Check if any of the following fuses for Fuse block (J/B) are blown.

NOTE:
Refer to 

SE-100, "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 

SE-

100, "Component Parts and Harness Connector Location"

 .

2. 

 CHECK SEAT RELAY POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect climate controlled seat relay connector.

3.

Check voltage between climate controlled seat relay connector
E76 terminal 2 (W/G) 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 between climate controlled relay terminals 3 and 5,
6 and 7.

OK or NG

OK

>> GO TO 4.

NG

>> Replace climate controlled seat relay.

COMPONENT PARTS

TERMINAL NO. (SIGNAL)

AMPERE

FUSE NO.

Fuse block (J/B)

2J (IGN power supply)

10A

1

Con-

nector

Terminal

(Wire color)

Condition

Voltage (V)

(Approx.)

(+)

(–)

E76

2 (W/G)

Ground

Turn ignition switch ON.

 Battery voltage

Turn ignition switch OFF.

0

PIIA3318E

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

CLIMATE CONTROLLED SEAT

SE-111

C

D

E

F

G

H

J

K

L

M

A

B

SE

4. 

 CHECK CLIMATE CONTROLLED SEAT CONTROL UNIT GROUND CIRCUIT

Check continuity between climate controlled seat relay connector
E76 terminal 1 (B) and ground.

OK or NG

OK

>> Climate controlled seat relay power supply circuit check

is OK.

NG

>> Repair or replace harness between climate controlled

seat relay and body ground.

Driver Side Climate Controlled Seat Control Unit Power Supply and Ground Cir-
cuit Inspection

AIS002C6

1. 

CHECK FUSE 

Check if any of the following fuses for Fuse, fusible link and relay unit (J/B) are blown.

NOTE:
Refer to 

SE-100, "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 

SE-

100, "Component Parts and Harness Connector Location"

 .

2. 

 CHECK CLIMATE CONTROLLED SEAT CONTROL UNIT POWER SUPPLY CIRCUIT 1

1.

Turn ignition switch OFF.

2.

Remove climate controlled seat relay.

3.

Check voltage between climate controlled seat relay connector
E76 terminal 5 (R) and ground.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace harness between fuse and climate

controlled seat relay.

3. 

 CHECK CLIMATE CONTROLLED SEAT RELAY

Check continuity between climate controlled seat relay terminals 3
and 5.

OK or NG

OK

>> GO TO 4.

NG

>> Replace climate controlled seat relay.

1 (B) 

−

 Ground

: Continuity should exist.

PIIA3319E

COMPONENT PARTS

AMPERE

FUSE NO.

Fuse, fusible link and relay unit

15A

72

5 (R) 

−

 Ground

: Battery voltage

PIIA3316E

Terminal

Condition

Continuity

3

5

12V direct current supply 
between terminals 1 and 2

Yes

No current supply

No

SEC202B

SE-112

CLIMATE CONTROLLED SEAT

4. 

CHECK CLIMATE CONTROLLED SEAT CONTROL UNIT POWER SUPPLY CIRCUIT 2

1.

Connect climate controlled seat relay.

2.

Disconnect climate controlled seat control unit connector.

3.

Turn ignition switch ON.

4.

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

OK or NG

OK

>> GO TO 5.

NG

>> Repair or replace harness between climate controlled seat relay and climate controlled seat con-

trol unit.

5. 

CHECK CLIMATE CONTROLLED SEAT CONTROL UNIT POWER SUPPLY CIRCUIT 3

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

OK or NG

OK

>> GO TO 6.

NG

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

climate controlled seat control unit.

6. 

 CHECK CLIMATE CONTROLLED SEAT CONTROL UNIT GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Check continuity between climate controlled seat control unit
connector B158 terminal JC (B) and ground.

OK or NG

OK

>> Driver side climate controlled seat control unit power

supply and ground circuit check is OK.

NG

>> Repair or replace harness between climate controlled

seat control unit and ground.

Con-

nector

Terminal

(Wire color)

Condition

Voltage (V)

(Approx.)

(+)

(–)

B158

JD(W/G)

Ground

Turn ignition switch ON.

 Battery voltage

Turn ignition switch OFF.

0

PIIA3385E

Con-

nector

Terminal

(Wire color)

Condition

Voltage (V)

(Approx.)

(+)

(–)

B158

JB(W/R)

Ground

Turn ignition switch ON.

 Battery voltage

Turn ignition switch OFF.

0

PIIA3384E

JC (B) 

−

 Ground

: Continuity should exist.

PIIA3335E