Infiniti F50. Manual - part 795

CLIMATE CONTROLLED SEAT

SE-171

C

D

E

F

G

H

J

K

L

M

A

B

SE

●

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.

Climate Controlled Relay Power Supply Circuit Check

EIS003SE

1. 

CHECK FUSE 

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

NOTE:
Refer to

SE-161, "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-

161, "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.

Turn ignition switch ON.

4.

Check voltage between climate controlled seat relay harness
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

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.

Con-

nector

Terminal

(Wire color)

Condition

Voltage (V)

(+)

(–)

E76

2 (W/G)

Ground

Turn ignition switch ON.

 Battery voltage

Turn ignition switch OFF.

0

PIIB0386E

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

SE-172

CLIMATE CONTROLLED SEAT

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 ground.

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

EIS003SF

1. 

CHECK FUSE 

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

NOTE:
Refer to 

SE-161, "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-

161, "Component Parts and Harness Connector Location"

 .

2. 

CHECK CLIMATE CONTROLLED SEAT CONTROL UNIT POWER SUPPLY CIRCUIT 1

1.

Turn ignition switch OFF.

2.

Disconnect 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, “fusible link

and relay unit” and climate controlled seat relay.

3. 

CHECK CLIMATE CONTROLLED SEAT RELAY

1.

Remove climate controlled seat relay.

2.

Check continuity between terminals 3 and 5.

OK or NG

OK

>> GO TO 4.

NG

>> Replace climate controlled seat relay.

1 (B) 

−

 Ground

: Continuity should exist

PIIB0388E

5 (R) 

−

 Ground

: Battery voltage

PIIB0389E

Terminal

Condition

Continuity

(+)

(-)

3

5

12V direct current supply 
between terminals 1 and 2

YES

No current supply

NO

SEC202B

CLIMATE CONTROLLED SEAT

SE-173

C

D

E

F

G

H

J

K

L

M

A

B

SE

4. 

CHECK CLIMATE CONTROLLED SEAT CONTROL UNIT POWER SUPPLY CIRCUIT 2

1.

Turn ignition switch OFF.

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

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

JB (W/G)

Ground

Turn ignition switch ON.

 Battery voltage

Turn ignition switch OFF.

0

PIIA3384E

Con-

nector

Terminal

(Wire color)

Condition

Voltage (V)

(Approx)

(+)

(–)

B158

JD (W/R)

Ground

Turn ignition switch ON.

 Battery voltage

Turn ignition switch OFF.

0

PIIA3385E

JC (B) 

−

 Ground

: Continuity should exist

PIIA3335E

SE-174

CLIMATE CONTROLLED SEAT

Passenger Side Climate Controlled Seat Control Unit Power Supply Circuit 
Inspection

EIS003TX

1. 

CHECK FUSE 

Check 10A fuse [No. 72, located in fuse, fusible link and relay unit]

NOTE:
Refer to

SE-161, "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-

161, "Component Parts and Harness Connector Location"

 .

2. 

CHECK CLIMATE CONTROLLED SEAT CONTROL UNIT POWER SUPPLY CIRCUIT 1

1.

Turn ignition switch OFF.

2.

Check voltage between climate controlled seat relay connector
E76 terminal 7 (L)and ground.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace harness between “fuse, fusible link

and relay unit” and climate controlled seat relay.

3. 

CHECK CLIMATE CONTROLLED SEAT RELAY

1.

Remove climate controlled seat relay.

2.

Check continuity between terminals 6 and 7.

OK or NG

OK

>> GO TO 4.

NG

>> Replace air conditioning seat relay.

7 (L) 

−

 Ground

: Battery voltage

PIIB0386E

Terminal

Condition

Continuity

(+)

(-)

6

7

12V direct current supply 
between terminals 1 and 2

YES

No current supply

NO

SEC202B