Infiniti F50. Manual - part 772

AUTOMATIC DRIVE POSITIONER

SE-79

C

D

E

F

G

H

J

K

L

M

A

B

SE

3. 

CHECK HARNESS CONTINUITY

1.

Disconnect driver seat control unit connector and power seat switch (driver side) connector.

2.

Check continuity between driver seat control unit connector
B143 terminals 17 (Y/R), 23 (G/W) and driver power seat switch
connector B144 terminals 17 (Y/R), 23 (G/W).

3.

Check continuity between driver seat control unit connector
B143 terminals 17(Y/R), 23 (G/W) and ground.

OK or NG

OK

>> GO TO 4.

NG

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

4. 

CHECK SLIDING SWITCH

Check continuity between driver seat control unit.

OK or NG

OK

>> GO TO 5.

NG

>> Replace driver power seat switch.

5. 

CHECK POWER SEAT SWITCH GROUND CIRCUIT

Check continuity between power seat switch (driver side) connector
B144 terminal 15 (B) and ground.

OK or NG

OK

>> Check the condition of the harness and connector.

NG

>> Repair or replace harness between driver seat switch

and ground.

17 (Y/R) – 17 (Y/R)

: Continuity should exist.

23 (G/W) – 23 (G/W)

: Continuity should exist.

17 (Y/R) – Ground

: Continuity should not exist.

23 (G/W) – Ground

: Continuity should not exist.

PIIA4148E

Terminals

 (Wire color)

Condition

Continuity

Connector

Terminal

(+)

(–)

B144

17

15

Sliding switch ON 
(forward operation).

Yes

Sliding switch OFF.

No

23

Sliding switch ON 
(backward operation).

Yes

Sliding switch OFF.

No

PIIA4380E

15 (B) – Ground

: Continuity should exist.

PIIA3375E

SE-80

AUTOMATIC DRIVE POSITIONER

Seat Reclining Switch System Inspection

EIS00425

1. 

CHECK FUNCTION

With CONSULT-II

With "RECLINING SW–FR,RECLINING SWRR" on the DATA MON-
ITOR, operate the reclining switch to check ON/OFF operation.

Without CONSULT-II

Carry out "SWITCH MONITOR" in the self-diagnosis function, and operate the reclining switch to check. Refer
to 

SE-50

 .

OK or NG

OK

>> Replace the driver seat control unit.

NG

>> GO TO 2.

2. 

CHECK RECLINING SWITCH INPUT/OUTPUT

1.

Turn ignition switch OFF.

2.

Check voltage between driver seat control unit connector and
ground.

OK or NG

OK

>> System is OK.

NG

>> GO TO 3.

Monitor item [OPERA-

TION or UNIT]

Contents

RECLN SW
–FR

"ON/

OFF"

Operation (ON)/open (OFF) status judged from the 
reclining switch (FR) signal is displayed.

RECLIN S
W–RR

"ON/

OFF"

Operation (ON)/open (OFF) status judged from the 
reclining switch (RR) signal is displayed.

PIIA0313E

Terminals 

(Wire color)

Condition

Voltage (V) 

(Approx.)

Connector

(+)

(–)

B143

18 (GY/B)

Ground

Reclining switch ON 
(forward operation).

0

Reclining switch OFF.

5

24 (SB)

Reclining switch ON 
(backward operation).

0

Reclining switch OFF.

5

PIIA4149E

AUTOMATIC DRIVE POSITIONER

SE-81

C

D

E

F

G

H

J

K

L

M

A

B

SE

3. 

CHECK HARNESS CONTINUITY

1.

Disconnect driver seat control unit connector and power seat switch (driver side) connector.

2.

Check continuity between driver seat control unit connector
B143 terminals 18 (GY/B), 24 (SB) and power seat switch
(driver side) connector B144 terminals 18 (GY/B), 24 (SB). 

3.

Check continuity between driver seat control unit connector
B143 terminals 18 (GY/B), 24 (SB) and ground.

OK or NG

OK

>> GO TO 4.

NG

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

4. 

CHECK RECLINING SWITCH

Check continuity between driver seat control unit.

OK or NG

OK

>> GO TO 5.

NG

>> Replace power seat switch (driver side).

5. 

CHECK POWER SEAT SWITCH GROUND CIRCUIT

Check continuity between power seat switch B144 terminal 15 (B)
and ground.

OK or NG

OK

>> Check the condition of the harness and connector.

NG

>> Repair or replace harness between power seat switch (driver side) and ground.

18 (GY/B) – 18 (GY/B)

:Continuity should exist.

24 (SB) – 24 (SB)

:Continuity should exist.

18 (GY/B) – Ground

:Continuity should not exist.

24 (SB) – Ground

:Continuity should not exist.

PIIA4353E

Terminals 

(Wire color)

Condition

Continuity

Connector

(+)

(–)

B144

18 (GY/B)

15 (B)

Reclining switch ON 
(forward operation).

Yes

Reclining switch OFF.

No

24 (SB)

Reclining switch ON 
(backward operation).

Yes

Reclining switch OFF.

No

PIIA4381E

15 (B) – Ground:

: Continuity should exist.

PIIA3375E

SE-82

AUTOMATIC DRIVE POSITIONER

Front Lifting Switch Circuit Inspection

EIS00426

1. 

CHECK FUNCTION

With CONSULT-II

With "LIFT FR SW-UP, LIFT FR SW-DN" on the DATA MONITOR,
operate the front lifting switch to check ON/OFF operation.

Without CONSULT-II

Carry out "SWITCH MONITOR" in the self-diagnosis function, and operate the front lifting switch to check.
Refer to 

SE-50

 .

OK or NG

OK

>> Replace the driver seat control unit.

NG

>> GO TO 2

2. 

CHECK FRONT LIFTING SWITCH INPUT/OUTPUT

1.

Turn ignition switch OFF.

2.

Check voltage between driver seat control unit B143 and
ground.

OK or NG

OK

>> System is OK.

NG

>> GO TO 3.

Monitor item [OPERA-

TION or UNIT]

Contents

LIFT FR SW–
DN

"ON/

OFF"

Operation (ON)/open (OFF) status judged from the FR 
lifter switch (DOWN) signal is displayed.

LIFT RR SW–
UP

"ON/

OFF"

Operation (ON)/open (OFF) status judged from the RR 
lifter switch (UP) signal is displayed.

PIIA0323E

Connector

Terminals 

(Wire color)

Condition

Voltage (V) 

(Approx.)

(+)

(–)

B143

19 (L/R)

Ground

Front lifting switch ON (UP 
operation).

0

Front lifting switch OFF.

5

25 (OR/B)

Front lifting switch ON.
(DOWN operation)

0

Front lifting switch OFF.

5

PIIA4355E