Infiniti Q45. Manual - part 847

HEATED SEAT

SE-143

C

D

E

F

G

H

J

K

L

M

A

B

SE

2. 

CHECK FRONT HEATED SEAT SWITCH GROUND HARNESS

Check continuity between front heated seat switch connector M94
(Driver side), M95 (passenger side) terminal 4 and ground.

OK or NG

OK

>> Check connector for damage or loose connection.

NG

>> Repair or replace harness between front heated seat

switch and ground.

Check Rear Power Seat Control Unit Power Supply Circuit

NIS0014M

1. 

CHECK REAR POWER SEAT OPERATION

Does the rear power seat operate normally?
YES or NO

YES

>> GO TO 4.

NO

>> GO TO 2.

2. 

CHECK FUSIBLE LINK 

Check 40A fusible link (letter H  located in the fuse and fusible link box).
NOTE:
Refer to

SE-124, "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-

2, "POWER SUPPLY ROUTING"

 .

3. 

CHECK REAR POWER SEAT CONTROL UNIT BATTERY POWER SUPPLY CIRCUIT

1.

Disconnect rear power seat control unit connector.

2.

Check voltage between rear power seat control unit connector
B162 (LH), B362 (RH) terminal 2 and ground.

OK or NG

OK

>> Check the condition of the harness connector.

NG

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

rear power seat control unit.

4. 

CHECK REAR POWER SEAT CONTROL UNIT IGNITION POWER SUPPLY CIRCUIT

1.

Turn ignition switch ON.

2.

Check voltage between rear power seat control unit connector
B162 (LH), B362 (RH) connector terminal 44 and ground.

OK or NG

OK

>> Check the condition of the harness and connector.

NG

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

rear power seat control unit.

4 (B) 

−

 Ground

:Continuity should exist

PIIA4034E

2 (G) 

−

 Ground

: Battery voltage

PIIA3978E

44 (GY/B) 

−

 Ground

: Battery voltage

PIIA4035E

SE-144

HEATED SEAT

Check Rear Power Seat Control Unit Power Supply and Ground Circuit

NIS0014N

1. 

CHECK REAR POWER SEAR OPERATION

Does the rear power seat operate normally?
YES or NO

YES

>> GO TO 4.

NO

>> GO TO 2.

2. 

CHECK REAR POWER SEAT CONTROL UNIT POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect rear power seat control unit connector.

3.

Check voltage between rear power seat control unit connector
B162 (LH), B362 (RH) terminal 2 and ground.

OK or NG

OK

>> GO TO 3.

NG

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

rear power seat control unit.

3. 

CHECK REAR POWER SEAT CONTROL UNIT GROUND CIRCUIT

Check continuity between rear power seat control unit connector
B162 (LH), B362 (RH) terminal 15 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 ground.

4. 

CHECK REAR POWER SEAT CONTROL UNIT POWER SUPPLY CIRCUIT

1.

Disconnect rear power seat control unit connector.

2.

Turn ignition switch ON.

3.

Check voltage between rear power seat control unit B162 (LH),
B362 (RH) connector terminal 44 and ground.

OK or NG

OK

>> Check the condition of the harness and connector.

NG

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

rear power seat control unit.

2 (G) 

−

 Ground

: Battery voltage

PIIA3978E

15 (B) 

−

 Ground

:Continuity should exist

PIIA4036E

44 (GY/B) 

−

 Ground

: Battery voltage

PIIA4035E

HEATED SEAT

SE-145

C

D

E

F

G

H

J

K

L

M

A

B

SE

Check Rear Power Seat Switch (Heater Switch) Ground Circuit

NIS0014O

1. 

CHECK REAR POWER SEAT SWITCH (HEATER SWITCH)

1.

Turn ignition switch OFF.

2.

Disconnect rear power seat switch (heater switch) connector.

3.

Check continuity between rear power seat switch (heater switch)
as follows.

OK or NG

OK

>> GO TO 2.

NG

>> Replace rear power seat switch (Heater switch).

2. 

CHECK REAR POWER SEAT SWITCH (HEATER SWITCH) GROUND CIRCUIT

Check continuity between rear power seat switch (heater switch)
connector D55 (LH), D75 (RH) terminal 2 and ground.

OK or NG

OK

>> Rear power seat switch (heater switch) ground circuit

check is OK.

NG

>> Repair or replace harness between rear power seat

switch (heater switch) and ground.

Check Rear Heated Seat Circuit 1

NIS0014P

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.

Terminal

Condition

Continuity

5

2

Rear heater switch HIGH

Yes

Other than above

No

6

Rear heater switch LOW

Yes

Other than above

No

PIIA4046E

2 (B) 

−

 Ground

:Continuity should exist

PIIA4038E

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

SE-146

HEATED SEAT

2. 

CHECK REAR SEAT CUSHION HEATER HARNESS

1.

Turn ignition switch OFF.

2.

Disconnect rear seatback heater connector.

3.

Check continuity between rear seatback connector B165 (LH),
B365 (RH) terminal A and ground.

OK or NG

OK

>> Replace rear seatback heater.

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 rear seat cush-
ion heater connector.

3.

Check continuity between rear seatback connector B165 (LH),
B365 (RH) terminal A and rear seat cushion heater connector
B166 (LH), B366 (RH) terminal A.

OK or NG

OK

>> GO TO 4.

NG

>> Repair or replace harness between rear seatback

heater and rear seat cushion heater.

4. 

CHECK REAR SEAT CUSHION HEATER GROUND CIRCUIT

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

A (Y/B) 

−

 Ground

:Continuity should not exist

PIIA4040E

A (Y/B) 

−

 A (Y/B)

:Continuity should exist

PIIA4041E

15B (B) 

−

 Ground

:Continuity should exist

PIIA4042E