Infiniti F50. Manual - part 790

HEATED SEAT

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Rear Heated Seat Circuit Inspection 1

EIS003W2

1. 

CHECK REAR SEAT CUSHION HEATER POWER SUPPLY

1.

Turn ignition switch ON.

2.

Check voltage between rear seatback heater and ground.

OK or NG

OK

>> GO TO 5.

NG

>> When turn ignition switch ON and heater switch LOW position or HIGH position check the follow-

ing.

●

When voltage is approx. 0V, GO TO 2.

●

When voltage is approx. 12V, GO TO 3.

2. 

CHECK REAR SEAT CUSHION HEATER HARNESS

1.

Turn ignition switch OFF.

2.

Disconnect rear seatback heater connector and front seat cush-
ion heater connector.

3.

Check continuity between rear seatback connector B365 (LH),
B365 (RH) terminal A (Y/B) and ground.

OK or NG

OK

>> Replace rear seatback.

NG

>> Repair or replace harness between rear seatback and

rear seat cushion.

3. 

CHECK REAR SEAT CUSHION HEATER HARNESS

1.

Turn ignition switch OFF.

2.

Disconnect rear seatback heater connector and front seat cush-
ion heater connector.

3.

Check continuity between rear seatback connector B165 (LH),
B365 (RH) terminal A (Y/B) and rear seat cushion heater con-
nector B166 (LH), B366 (RH) terminal A (Y/B).

OK or NG

OK

>> GO TO 4.

NG

>> Repair or replace harness between rear seatback and

rear seat cushion.

Connector

Terminal

(Wire color)

Condition

Voltage (V) 

(Approx.)

(+)

(–)

B165

 (LH),

B365

(RH)

A (Y/B)

Ground

Turn ignition switch ON.
Heater switch LOW.

6.0

Turn ignition switch ON.
Heater switch HIGH.

6.0

Heater switch OFF.

0

PIIA4039E

A (Y/B) 

−

 Ground

:Continuity should not exist

PIIA4040E

A (Y/B) 

−

 A (Y/B)

:Continuity should exist

PIIA4041E

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HEATED SEAT

4. 

CHECK REAR SEAT CUSHION HEATER GROUND CIRCUIT

Check continuity between rear seat cushion heater connector B166
(LH), B366 (RH) terminal 15B (B) and ground.

OK or NG

OK

>> Rear rear heated seat cushion circuit inspection is OK.

NG

>> Repair or replace harness between rear seat cushion

heater and ground.

5. 

CHECK FRONT SEAT CUSHION

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

Does seat cushion get warm?

YES

>> Replace rear seat cushion.

NO

>> Check connector for damage or loose connection.

Rear Heated Seat Circuit Inspection 2

EIS003WB

1. 

CHECK REAR SEATBACK HEATER POWER SUPPLY

1.

Turn ignition switch ON.

2.

Check voltage between rear power seat control unit connector
and ground.

OK or NG

OK

>> GO TO 3.

NG

>> GO TO 2.

2. 

CHECK REAR SEAT BACK HEATER HARNESS

1.

Turn ignition switch OFF.

2.

Disconnect rear seat control unit connector and rear seatback
heater connector.

3.

Check continuity between rear seat control unit connector B162
(LH), B362 (RH) terminal 8 (OR) and ground.

OK or NG

OK

>> Replace rear seat control unit.

NG

>> Repair or replace harness between rear seat control unit

and seatback heater.

15B (B) 

−

 Ground

:Continuity should exist

PIIA4042E

Con-

nector

Terminal

(Wire color)

Condition

Voltage (V) 

(Approx.)

(+)

(–)

B162 

(LH),

B362 

(RH)

8 (OR)

Ground

Turn ignition switch ON.
Heater switch LOW.

 Battery voltage

Heater switch OFF.

0

PIIA4101E

8 (OR) 

−

 Ground

:Continuity should not exist

PIIA4102E

HEATED SEAT

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3. 

CHECK REAR SEATBACK HEATER HARNESS

1.

Turn ignition switch OFF.

2.

Disconnect rear seat control unit connector and rear seatback
heater connector.

3.

Check continuity between rear seat control unit connector B162
(LH), B362 (RH) terminal 8 (OR) and rear seatback heater con-
nector B165 (LH), B365 (RH) terminal 8 (OR).

OK or NG

OK

>> GO TO 4.

NG

>> Repair or replace harness between rear seat control unit

and rear seatback heater.

4. 

CHECK REAR SEATBACK HEATER

Check continuity between rear seatback heater B165 (LH), B365
(RH) terminal A (Y/B) and 8 (OR).

OK or NG

OK

>> Check the condition of the harness and connector.

NG

>> Replace rear seatback heater.

Rear Heated Seat Circuit Inspection 3

EIS003WC

1. 

CHECK REAR SEATBACK HEATER POWER SUPPLY

1.

Turn ignition switch ON.

2.

Check voltage between rear power seat control unit connector
and ground.

OK or NG

OK

>> GO TO 3.

NG

>> GO TO 2.

8 (OR) 

−

 8 (OR)

:Continuity should exist

PIIA4120E

A (Y/B) 

−

 8 (OR)

: Continuity should exist

PIIA4117E

Con-

nector

Terminal

(Wire color)

Condition

Voltage (V) 

(Approx.)

(+)

(–)

B162 

(LH),

B362 

(RH)

5 (BR)

Ground

Turn ignition switch ON.
Heater switch HIGH.

 Battery voltage

Heater switch OFF.

0

PIIA4114E

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HEATED SEAT

2. 

CHECK REAR SEAT BACK HEATER HARNESS

1.

Turn ignition switch OFF.

2.

Disconnect rear seat control unit connector and rear seatback
heater connector.

3.

Check continuity between rear seat control unit connector B162
(LH), B362 (RH) terminal 5 (BR) and ground.

OK or NG

OK

>> Replace rear power seat control unit.

NG

>> Repair or replace harness between rear power seat con-

trol unit and rear seatback heater.

3. 

CHECK REAR SEAT BACK HEATER HARNESS

1.

Turn ignition switch OFF.

2.

Disconnect rear seat control unit connector and rear seatback
heater connector.

3.

Check continuity between rear seat control unit connector B162
(LH), B362 (RH) terminal 5 (BR) and rear seatback heater con-
nector B165 (LH), B365 (RH) terminal 5 (BR).

OK or NG

OK

>> GO TO 4.

NG

>> Repair or replace harness between rear power seat con-

trol unit and rear seatback heater.

4. 

CHECK REAR SEATBACK HEATER

Check continuity between rear seatback heater B165 (LH), B365
(RH) terminal A (Y/B) and 5 (BR).

OK or NG

OK

>> Check the condition of the harness and connector.

NG

>> Replace rear seatback heater.

5 (BR) 

−

 Ground

:Continuity should not exist

PIIA4115E

5 (BR) 

−

 5 (BR)

:Continuity should exist

PIIA4116E

A (Y/B) 

−

 5 (BR)

: Continuity should exist

PIIA4118E