Infiniti M45 (Y34). Manual - part 765

AUTOMATIC DRIVE POSITIONER

SE-81

C

D

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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 body ground.

OK or NG

OK

>> GO TO 4.

NG

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

4. 

RECLINING SWITCH INSPECTION

Check continuity between driver seat switch.

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 14 (B/W)
and body ground.

OK or NG

OK

>> Check the harness and connector.

NG

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

PIIA3300E

Terminals 

(Wire color)

Condition

Continuity

Connector

Terminal

(+)

(–)

B143

18 (GY/B)

14 (B/W)

Reclining switch ON 
(FR operation)

Yes

Reclining switch 
OFF

No

24 (SB)

Reclining switch ON 
(RR operation)

Yes

Reclining switch 
OFF

No

PIIA4478E

14 (B/W) – Ground

: Continuity should exist.

PIIA3297E

SE-82

AUTOMATIC DRIVE POSITIONER

Front End Seat Lifting Switch Circuit Inspection

AIS001KF

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-49, "SWITCH MONITOR"

 .

OK or NG

OK

>> Replace the driver seat control unit.

NG

>> GO TO 2.

2. 

CHECK FRONT END LIFTING SWITCH INPUT/OUTPUT

1.

Turn ignition switch OFF.

2.

Check voltage between driver seat control unit B143 and body
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"

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

LIFT RR SW–
UP

"ON/

OFF"

ON / 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

PIIA3301E

AUTOMATIC DRIVE POSITIONER

SE-83

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 19 (L/R), 25 (OR/B) and driver seat switch con-
nector B144 terminals 19 (L/R), 25 (OR/B).

3.

Check continuity between driver seat control unit connector
B143 terminals 19 (L/R), 25 (OR/B) and body ground.

OK or NG

OK

>> GO TO 4.

NG

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

4. 

CHECK FRONT END LIFTING SWITCH

Check continuity between driver seat switch.

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 connector B144
terminal 14 (B/W) and body ground.

OK or NG

OK

>> Check the harness and connector.

NG

>> Repair or replace harness between power seat switch and body ground.

19 (L/R) – 19 (L/R)

: Continuity should exist.

25 (OR/B) – 25 (OR/B)

: Continuity should exist.

19 (L/R) – Ground

: Continuity should not exist.

25 (OR/B) – Ground

: Continuity should not exist.

PIIA3302E

Connector

Terminals 

(Wire color)

Condition

Continuity

(+)

(–)

B143

19 (L/R)

14 (B/W)

Front lifting switch ON (UP 
operation)

Yes

Front lifting switch OFF

No

25 (OR/B)

Front lifting switch ON
(DOWN operation)

Yes

Front lifting switch OFF

No

PIIA4479E

14 (B/W) – Ground

: Continuity should exist.

PIIA3297E

SE-84

AUTOMATIC DRIVE POSITIONER

Rear End Seat Lifting Switch Circuit Inspection

AIS001KG

1. 

CHECK FUNCTION

With CONSULT-II

With “LIFT RR SW-UP, LIFT RR SW-DN” on the DATA MONITOR,
operate the rear lifting switch to check ON/OFF operation.

Without CONSULT-II

Carry out “SWITCH MONITOR” in the self-diagnosis function, and operate the rear lifting switch to check.
Refer to 

SE-49, "SWITCH MONITOR"

 .

OK or NG

OK

>> Replace the driver seat control unit.

NG

>> GO TO 2.

2. 

CHECK REAR END LIFTING SWITCH INPUT/OUTPUT

1.

Turn ignition switch turn OFF.

2.

Check voltage between driver seat control unit connector and
body ground.

OK or NG

OK

>> System is OK.

NG

>> GO TO 3.

Monitor item [OPERATION or 

UNIT]

Contents

LIFT RR SW–UP

"ON/OFF"

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

LIFT RR SW–DN

"ON/OFF"

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

PIIA0323E

Connector

Terminals

 (Wire color)

Condition

Voltage (V) 

(Approx)

(+)

(–)

B143

26 (P/B)

Ground

Rear lifting switch ON(UP 
operation)

0

Rear lifting switch OFF

5

27 (B/Y)

Rear lifting switch ON
(DOWN operation)

0

Rear lifting switch OFF

5

PIIA3303E