Infiniti Q45. Manual - part 841

POWER SEAT

SE-119

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 and ground.

OK or NG

OK

>> Check the harness and connector.

NG

>> Repair or replace harness between auto return cancel

switch and ground.

Check Rear Door Switch Circuit

NIS0013Z

WITH HEATED SEAT

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 and door lock assembly (door
switch) connector D62 (LH), D82(RH) terminal 1.

3.

Check continuity between rear power seat control unit connector
B163 (LH), B363 (RH) terminal 43 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

Connector

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 (W)

:Continuity should exist

43 (GY/R) 

−

 Ground

:Continuity should not exist

PIIA3992E

SE-120

POWER SEAT

3. 

CHECK DOOR SWITCH

Check continuity between door lock assembly connector as follows.

OK or NG

OK

>> GO TO 4.

NG

>> Replace door lock assembly.

4. 

CHECK DOOR SWITCH HARNESS

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

WITHOUT HEATED SEAT

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.

Terminal

Condition

Continuity

1

2

Door switch ON

Yes

Door switch OFF

No

PIIA3993E

2 (B) 

−

 Ground

:Continuity should exist

PIIA4025E

Connector

Terminal

(Wire color)

Condition

Voltage (V) 

(Approx.)

(+)

(–)

B168 (LH)

B368 (RH)

43 (GY/R)

Ground

rear door open

0

rear door closed

 Battery voltage

PIIA4023E

POWER SEAT

SE-121

C

D

E

F

G

H

J

K

L

M

A

B

SE

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
B168 (LH), B368 (RH) terminal 43 and door lock assembly (door
switch) connector D62 (LH), D82(RH) terminal 1.

3.

Check continuity between rear power seat control unit connector
B163 (LH), B363 (RH) terminal 43 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).

3. 

CHECK CANCEL SWITCH

Check continuity between door lock assembly connector as follows.

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 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.

43 (GY/R) 

−

 1 (W)

:Continuity should exist

43 (GY/R) 

−

 Ground

:Continuity should not exist

PIIA4024E

Terminal

Condition

Continuity

1

2

Door switch ON

Yes

Door switch OFF

No

PIIA3993E

2 (B) 

−

 Ground

:Continuity should exist

PIIA4025E

SE-122

POWER SEAT

Check Rear Power Seat Sliding Sensor Circuit

NIS00140

WITH HEATED SEAT

1. 

CHECK REAR POWER SEAT SLIDING 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 sensor circuit check is OK.

NG

>> GO TO 2.

2. 

CHECK REAR POWER SEAT SLIDING SENSOR HARNESS

1.

Disconnect rear power seat control unit connector and rear
power seat sliding motor sensor connector.

2.

Check continuity between rear power seat control unit connector
B163 (LH), B363 (RH) terminal 21, 74 and rear power seat slid-
ing motor connector B164 (LH), B364 (RH) terminal 21, 74.

3.

Check continuity between rear power seat control unit connector
B163 (LH), B363 (RH) terminal 21, 74 and ground.

OK or NG

OK

>> Replace rear power seat sliding motor.

NG

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

Connector

Terminal

(Wire color)

Condition

Signal

(Reference valve)

(+)

(–)

B163 (LH)

B363 (RH)

21

 (W/G)

Ground

Rear power 
seat switch 
(sliding switch)
forward or 
backward

PIIA3994E

SIIA0690J

21 (W/G) 

−

 21 (W/G)

:Continuity should exist.

74 (G/R) 

−

 74 (G/R)

:Continuity should exist.

21 (W/G) 

−

 Ground

:Continuity should not exist.

74 (G/R) 

−

 Ground

:Continuity should not exist.

PIIA3995E