Infiniti F50. Manual - part 788

HEATED SEAT

SE-143

C

D

E

F

G

H

J

K

L

M

A

B

SE

4. 

CHECK FRONT SEAT CUSHION HEATER HARNESS

1.

Turn ignition switch OFF.

2.

Disconnect front seat back heater connector and front seat
cushion heater connector.

3.

Check continuity between front seat back heater connector
B152 (Driver side), B352 (Passenger side) terminal C (SB) and
front seat cushion heater connector B151 (Driver side), B351
(Passenger side) terminal C (SB).

OK or NG

OK

>> GO TO 5.

NG

>> Repair or replace harness between front seat back and

font seat cushion.

5. 

CHECK FRONT SEAT CUSHION GROUND HARNESS

Check continuity between front seat cushion heater connector B151
(Driver side), B351 (Passenger side) terminal 15C (B) and ground.

OK or NG

OK

>> GO TO 6.

NG

>> Repair or replace harness between front seat  cushion

heater and ground.

6. 

CHECK FRONT SEAT CUSHION

Does the heater operate normally when the seat cushion is exchanged?

Does seat cushion get warm?

YES

>> Replace rear seatback.

NO

>> Check connector for damage or loose connection.

C (SB) 

−

 C (SB)

:Continuity should exist

PIIB0402E

15C (B) 

−

 Ground

:Continuity should exist

PIIA4108E

SE-144

HEATED SEAT

Front Heated Seat  Circuit Inspection 2

EIS003VZ

1. 

CHECK FRONT SEATBACK HEATER 1

1.

Turn ignition switch ON.

2.

Check voltage between front heated seat switch  and  ground.

OK or NG

OK

>> GO TO 3.

NG

>> GO TO 2.

2. 

CHECK FRONT HEATED SEAT SWITCH

1.

Turn ignition switch OFF.

2.

Disconnect front heated seat switch connector.

3.

Check continuity between front heated seat switch as follows.

OK or NG

OK

>> Check connector for damage or loose connection.

NG

>> Replace front heated seat switch.

Connector

Terminal

(Wire color)

Condition

Voltage (V) 

(Approx.)

(+)

(–)

M94

 (Driver side)

2 (L/W)

Ground

Turn ignition switch ON.
Front heated seat switch 
LOW.

 Battery voltage

Front heated seat switch 
OFF.

0

M95

(Passenger 

side)

2 (P)

Ground

Turn ignition switch ON.
Front heated seat switch 
LOW.

 Battery voltage

Front heated seat switch 
OFF.

0

PIIA4109E

Terminal

Condition

Continuity

1

2

Front heated seat switch LOW.

YES

Other than above.

NO

PIIA4110E

HEATED SEAT

SE-145

C

D

E

F

G

H

J

K

L

M

A

B

SE

3. 

CHECK FRONT SEATBACK HEATER HARNESS

1.

Turn ignition switch OFF.

2.

Disconnect front heated seat switch connector and front seat-
back heater connector.

3.

Check continuity between front heated seat switch connector
M94(driver side), M95 (passenger side) terminal 2 and front
seatback heater connector B152(driver side), B352(passenger
side) terminal 62(L).

4.

Check continuity between front heated seat switch connector M94(driver side), M95 (passenger side) ter-
minal 2 and ground.

OK or NG

OK

>> GO TO 4.

NG

>> Repair or replace harness between front heated seat switch and front seatback heater.

4. 

CHECK FRONT SEATBACK HEATER

Check continuity between front seatback heater B152 (LH), B352
(RH) terminal C (SB) and 62 (L).

OK or NG

OK

>> Check the condition of the harness and connector.

NG

>> Replace front seatback heater.

Driver side

2 (L/W) – 62 (L)

: Continuity should exist

Passenger side

2 (P) – 62 (L)

: Continuity should exist

Driver side

2 (L/W) – Ground

: Continuity should not exist

Passenger side

2 (P) – Ground

: Continuity should not exist

PIIA4029E

C (SB) 

−

 62 (L)

: Continuity should exist

PIIA4111E

SE-146

HEATED SEAT

Front Heated Seat Circuit Inspection 3

EIS003W0

1. 

CHECK FRONT HEATED SEAT SWITCH

1.

Turn ignition switch ON.

2.

Check voltage between front heated seat switch  and  ground.

OK or NG

OK

>> GO TO 3.

NG

>> GO TO 2.

2. 

CHECK FRONT HEATED SEAT SWITCH

1.

Turn ignition switch OFF.

2.

Disconnect front heated seat switch connector.

3.

Check continuity between front heated seat switch as follows.

OK or NG

OK

>> Check the condition of the harness and connector.

NG

>> Replace front heated seat switch.

Connector

Terminal

(Wire color)

Condition

Voltage (V) 

(Approx..)

(+)

(–)

M94

 (Driver side)

3 (R/Y)

Ground

Turn ignition switch ON.
Front heated seat switch 
HIGH.

 Battery voltage

Front heated seat switch 
OFF.

0

M95

(Passenger 

side)

3 (Y)

Ground

Turn ignition switch ON.
Front heated seat switch 
HIGH.

 Battery voltage

Front heated seat switch 
OFF.

0

PIIA4030E

Terminal

Condition

Continuity

1

3

Front heated seat switch HIGH.

YES

Other than above.

NO

PIIA4031E