Infiniti F50. Manual - part 783

POWER SEAT

SE-123

C

D

E

F

G

H

J

K

L

M

A

B

SE

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 (Without Heated Seat)

EIS003VH

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

>> INSPECTION END.

NG

>> Replace rear power seat control unit.

Terminal

Condition

Continuity

7 (G/Y)

2 (B)

Rear power seat switch (sliding switch) 
backward.

YES

Rear power seat switch (sliding switch) 
OFF.

NO

8 (OR/L)

2 (B)

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.)

(+)

(–)

B168 

(LH)

B368 

(RH)

36 (LG/R)

Ground

Auto return cancel switch ON
rear door open.

5

Other than above.

0

PIIA4021E

SE-124

POWER SEAT

2. 

CHECK AUTO CANCEL 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
B168 (LH), B368 (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
B168 (LH), B368 (RH) terminal 36 (LG/R) and ground.

OK or NG

OK

>> Check 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 (Without Heated Seat)

EIS0040R

1. 

CHECK REAR 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
B168 (LH), B368 (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
B168 (LH), B368 (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

PIIA4022E

36 (LG/R) 

−

 1 (BR)

:Continuity should exist

36 (LG/R) 

−

 Ground

:Continuity should not exist

PIIA4022E

Terminal

Condition

Continuity

1 (BR)

2 (B)

Auto return cancel switch cancelled.

YES

Auto return cancel switch ON.

NO

PIIA3989E

POWER SEAT

SE-125

C

D

E

F

G

H

J

K

L

M

A

B

SE

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 (Without Heated Seat)

EIS003VI

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

>> Replace door 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 door lock
assembly (door switch) connector.

2.

Check continuity between rear power seat control unit connector
B168 (LH), B368 (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.)

(+)

(–)

B168 

(LH),

B368 

(RH)

43 (GY/R)

Ground

rear door (LH) open.

0

rear door (LH) closed.

 Battery voltage

PIIA4023E

43 (GY/R) 

−

 1 (W)

:Continuity should exist

43 (GY/R) 

−

 Ground

:Continuity should not exist

PIIA4024E

SE-126

POWER SEAT

3. 

CHECK CANCEL SWITCH

Check continuity between door lock assembly connector.

OK or NG

OK

>> GO TO 4.

NG

>> Replace door lock assembly.

4. 

CHECK REAR POWER SEAT SWITCH HARNESS

Check continuity between door lock assembly connector D62 (LH),
D82 (RH) terminal 2 (B) and ground.

OK or NG

OK

>> Check the condition of the harness and connector.

NG

>> Repair or replace harness between door lock assembly

and ground.

Rear Power Seat Sliding Sensor Circuit Inspection (Without Heated Seat)

EIS003VJ

1. 

CHECK REAR POWER SEAT SLIDING MOTOR SENSOR POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Check signal between rear power seat control unit connector
and ground with oscilloscope.

OK or NG

OK

>> Rear power seat sliding motor sensor circuit check is OK.

NG

>> GO TO 2.

Terminal

Condition

Continuity

1 (W)

2 (B)

Door switch ON.

YES

Door switch OFF.

NO

PIIA3993E

2 (B) 

−

 Ground

:Continuity should exist

PIIA4025E

Con-

nec-

tor

Terminal

(Wire color)

Condition

Voltage (V)

 (Approx.)

(+)

(–)

B168 

(LH),

B368 

(RH)

21 

(W/G)

Ground

Rear power seat 
switch (sliding switch) 
forward or backward.

PIIA4026E

SIIA0690J