Infiniti Q45. Manual - part 831

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 18, 24 and power seat switch (driver side) con-
nector B144 terminals 18, 24. 

3.

Check continuity between driver seat control unit connector
B143 terminals 18, 24 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 connector B144
terminal 18, 24 and 15.

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 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

Connector

Terminals Condition

Continuity

B144

18

15

Reclining switch ON 
(forward operation)

Yes

Reclining switch OFF

No

24

Reclining switch ON 
(backward operation)

Yes

Reclining switch OFF

No

PIIA4381E

15 (B) – Ground

: Continuity should exist.

PIIA3375E

SE-80

AUTOMATIC DRIVE POSITIONER

Check Front Lifting Switch Circuit

NIS00139

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 on-board 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 LIFTING 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

[OPERATION 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

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 19, 25 and driver seat switch connector B144
terminals 19, 25.

3.

Check continuity between driver seat control unit connector
B143 terminals 19, 25 and ground 

OK or NG

OK

>> GO TO 4.

NG

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

4. 

CHECK FRONT END LIFTING SWITCH

Check continuity between driver seat control unit connector B144
terminal 19, 25 and 15.

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 connector B144 termi-
nal 15 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.

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.

PIIA4354E

Connector

Terminals Condition

Continuity

B144

19

15

Front lifting switch ON
(UP operation)

Yes

Front lifting switch OFF

No

25

Front lifting switch ON
(DOWN operation)

Yes

Front lifting switch OFF

No

PIIA4382E

15 (B) – Ground

: Continuity should exist.

PIIA3375E

SE-82

AUTOMATIC DRIVE POSITIONER

Check Rear Lifting Switch Circuit

NIS0013A

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 on-board 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 LIFTING 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

[OPERATION or UNIT]

Contents

LIFT RR SW–UP

"ON/

OFF"

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

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