Infiniti F50. Manual - part 781

POWER SEAT

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Rear Power Seat Switch Circuit Inspection (With Heated Seat)

EIS003V8

1. 

CHECK REAR POWER SEAT SWITCH POWER SUPPLY

1.

Turn ignition switch OFF.

2.

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

OK or NG

OK

>> Rear power seat switch circuit check is OK.

NG

>> GO TO 2.

2. 

CHECK REAR POWER SEAT SWITCH HARNESS

1.

Disconnect rear power seat control unit connector and rear
power seat switch connector.

2.

Check continuity between rear power seat control unit connector
B163 (LH), B363 (RH) terminal 18 (BR/W), 24 (L/G) and rear
power seat switch connector D55 (LH), D75 (RH) terminal 7 (G/
Y), 8 (OR/L).

3.

Check continuity between rear power seat control unit connector B162 (LH), B362 (RH) terminal 18 (BR/
W), 24 (L/G) and ground.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace harness between rear power seat control unit and rear power seat switch.

Con-

nector

Terminal

(Wire color)

Condition

Voltage (V) 

(Approx.)

(+)

(–)

B162 

(LH)

B362 

(RH)

18 (BR/W)

Ground

Rear power seat switch (sliding 
switch) backward.

0

Rear power seat switch (sliding 
switch) OFF.

 Battery 

voltage

24 (L/G)

Ground

Rear power seat switch (sliding 
switch) forward.

0

Rear power seat switch (sliding 
switch) OFF.

 Battery 

voltage

PIIA3983E

LH

18 (BR/W) 

−

 7 (G/Y)

:Continuity should exist

24 (L/G) 

−

 8 (OR/L)

:Continuity should exist

RH

18 (BR/W) 

−

 8 (OR/L)

:Continuity should exist

24 (L/G) 

−

 7 (G/Y)

:Continuity should exist

18 (BR/W) 

−

 Ground

:Continuity should not exist

24 (L/G) 

−

 Ground

:Continuity should not exist

PIIA3984E

SE-116

POWER SEAT

3. 

CHECK REAR POWER SEAT SWITCH

Check continuity between rear power seat switch as follows.

OK or NG

OK

>> GO TO 4.

NG

>> Replace rear power seat switch.

4. 

CHECK REAR POWER SEAT SWITCH GROUND CIRCUIT

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

OK or NG

OK

>> Replace rear power seat control unit.

NG

>> Repair or replace harness between rear power seat

switch and ground.

Auto Return Cancel Switch Circuit Inspection 1 (With Heated Seat)

EIS003V9

1. 

CHECK AUTO RETURN CANCEL SWITCH POWER SUPPLY

1.

Turn ignition switch OFF.

2.

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

OK or NG

OK

>> Auto return cancel switch circuit check is OK.

NG

>> GO TO 2.

Terminal

Condition

Continuity

7

2

Rear power seat switch (sliding switch) 
backward.

YES

Rear power seat switch (sliding switch) 
OFF.

NO

8

2

Rear power seat switch (sliding switch) 
forward.

YES

Rear power seat switch (sliding switch) 
OFF.

NO

PIIA3985E

2 (B) 

−

 Ground

:Continuity should exist

PIIA3986E

Con-

nector

Terminal

(Wire color)

Condition

Voltage (V) 

(Approx.)

(+)

(–)

B163 

(LH),

B363 

(RH)

36 (LG/R)

Ground

Auto return cancel switch ON 
and, rear door LH open.

5

Other than above.

0

PIIA3987E

POWER SEAT

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2. 

CHECK REAR POWER SEAT SWITCH HARNESS

1.

Disconnect rear power seat control unit connector and auto
return cancel switch connector.

2.

Check continuity between rear power seat control unit connector
B163 (LH), B363 (RH) terminal 36 (LG/R) and auto return cancel
switch connector B504 terminal 1 (BR).

3.

Check continuity between rear power seat control unit connector
B163 (LH), B363 (RH) terminal 36 (LG/R) and ground.

OK or NG

OK

>> Check the condition of the harness and connector.

NG

>> Repair or replace harness between rear power seat control unit and auto return cancel switch.

Auto Return Cancel Switch Circuit Inspection 2 (With Heated Seat)

EIS003VA

1. 

CHECK AUTO RETURN CANCEL SWITCH HARNESS

1.

Turn ignition switch OFF.

2.

Disconnect rear power seat control unit connector and auto
return cancel switch connector.

3.

Check continuity between rear power seat control unit connector
B163 (LH), B363 (RH) terminal 36 (LG/R) and auto return cancel
switch connector B504 terminal 1 (BR).

4.

Check continuity between rear power seat control unit connector
B163 (LH), B363 (RH) terminal 36 (LG/R) and ground.

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace harness between rear power seat control unit and auto return cancel switch.

2. 

CHECK AUTO RETURN CANCEL SWITCH

Check continuity between auto cancel switch as follows.

OK or NG

OK

>> GO TO 3.

NG

>> Replace auto return cancel switch.

36 (LG/R) 

−

 1 (BR)

:Continuity should exist

36 (LG/R) 

−

 Ground

:Continuity should not exist

PIIA3988E

36 (LG/R) 

−

 1 (BR)

:Continuity should exist

36 (LG/R) 

−

 Ground

:Continuity should not exist

PIIA3988E

Terminal

Condition

Continuity

1 (BR)

2 (B)

Auto return cancel switch cancelled.

YES

Auto return cancel switch ON.

NO

PIIA3989E

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POWER SEAT

3. 

CHECK AUTO RETURN CANCEL SWITCH GROUND HARNESS

Check continuity between auto return cancel switch connector B504
terminal 2 (B) and ground.

OK or NG

OK

>> Check the harness and connector.

NG

>> Repair or replace harness between auto return cancel

switch and ground.

Rear Door Switch Circuit Inspection (With Heated Seat)

EIS003VB

1. 

CHECK REAR DOOR SWITCH POWER SUPPLY

1.

Turn ignition switch OFF.

2.

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

OK or NG

OK

>> Rear door switch circuit check is OK.

NG

>> GO TO 2.

2. 

CHECK DOOR SWITCH HARNESS

1.

Disconnect rear power seat control unit connector and door lock
assembly (door switch) connector.

2.

Check continuity between rear power seat control unit connector
B163 (LH), B363 (RH) terminal 43 (GY/R) and door lock assem-
bly (door switch) connector D62 (LH), D82(RH) terminal 1 (W).

3.

Check continuity between rear power seat control unit connector
B163 (LH), B363 (RH) terminal 43 (GY/R) and ground.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace harness between rear power seat control unit and door lock assembly (door

switch).

2 (B) 

−

 Ground

:Continuity should exist

PIIA3990E

Con-

nector

Terminal

(Wire color)

Condition

Voltage (V) 

(Approx.)

(+)

(–)

B163 

(LH),

B363 

(RH)

43 (GY/R)

Ground

Rear door open.

0

Rear door closed.

 Battery voltage

PIIA3991E

43 (GY/R) 

−

 1 (BR)

:Continuity should exist

43 (GY/R) 

−

 Ground

:Continuity should not exist

PIIA3992E