Infiniti Q45. Manual - part 827

AUTOMATIC DRIVE POSITIONER

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Check Sliding Sensor Circuit

NIS0012W

1. 

CHECK SLIDING SENSOR MECHANISM

Check the operation malfunction caused by sliding rail deformation or parts are loose.
OK or NG

OK

>> GO TO 2.

NG

>> Repair the malfunctioning part and check again.

2. 

CHECK SLIDING SENSOR INPUT/OUTPUT SIGNAL

1.

Turn ignition switch OFF.

2.

Check signal between driver seat control unit connector and
ground, with oscilloscope.

OK or NG

OK

>> System is OK.

NG

>> GO TO 3.

3. 

CHECK HARNESS CONTINUITY

1.

Disconnect driver seat control unit connector and sliding motor connector.

2.

Check continuity between driver seat control unit connector
B143 terminals 20, 32 and sliding motor B146 terminals 20, 32A.

3.

Check continuity between driver seat control unit B143 terminals
20, 32 and ground.

OK or NG

OK

>> Replace sliding motor.

NG

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

Connector

Terminals 

(Wire color)

Condition

Signal

(Reference valve)

(+)

(–)

B143

20 (G/B)

Ground

Sliding 
motor 
operation

PIIA4130E

PIIA3277E

20 (G/B) – 20 (G/B)

: Continuity should exist.

32 (R/W) – 32A (R/W)

: Continuity should exist.

20 (G/B) – Ground

:Continuity should not exist.

32 (R/W) – Ground

:Continuity should not exist.

PIIA4129E

SE-64

AUTOMATIC DRIVE POSITIONER

Check Reclining Sensor Circuit

NIS0012X

1. 

CHECK RECLINING SENSOR MECHANISM

Check the operation malfunction caused by reclining mechanism deformation or parts are loose.
OK or NG

OK

>> GO TO 2.

NG

>> Repair the malfunctioning part and check again.

2. 

CHECK RECLINING SENSOR INPUT/OUTPUT SIGNAL

1.

Turn ignition switch OFF.

2.

Check signal between driver seat control unit connector and
ground, with oscilloscope.

OK or NG

OK

>> System is OK.

NG

>> GO TO 3.

3. 

CHECK HARNESS CONTINUITY

1.

Disconnect driver seat control unit connector and reclining motor connector.

2.

Check continuity between driver seat control unit connector
B143 terminals 30, 32 and reclining motor connector B147 ter-
minals 30, 32.

3.

Check continuity between driver seat control unit connector
B143 terminals 30, 32 and ground.

OK or NG

OK

>> Replace reclining motor.

NG

>> Repair or replace harness between driver seat control unit and reclining motor.

Connector

Terminals 

(Wire color)

Condition

Signal

(Reference value)

(+)

(–)

B143

30 (L)

Ground

Reclining 
motor 
operation

PIIA4141E

PIIA3278E

30 (L) – 30 (L)

: Continuity should exist.

32 (R/W) – 32 (R/W)

: Continuity should exist.

30 (L) – Ground

:Continuity should not exist.

32 (R/W) – Ground

:Continuity should not exist.

PIIA4144E

AUTOMATIC DRIVE POSITIONER

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Check Front Lifting Sensor Circuit

NIS0012Y

1. 

CHECK FRONT LIFTING SENSOR MECHANISM

Check the operation malfunction caused by lifter mechanism deformation or parts are loose.
OK or NG

OK

>> GO TO 2.

NG

>> Repair the malfunctioning part and check again.

2. 

CHECK FRONT LIFTING SENSOR INPUT/OUTPUT SIGNAL

1.

Turn ignition switch OFF.

2.

Check signal between driver seat control unit connector and
ground, with oscilloscope.

OK or NG

OK

>> System is OK.

NG

>> GO TO 3.

3. 

CHECK HARNESS CONTINUITY

1.

Disconnect driver seat control unit connector and front lifting
motor connector.

2.

Check continuity between driver seat control unit connector
B143 terminals 21, 32 and front lifting motor connector B148 ter-
minals 21, 32B.

3.

Check continuity between driver seat control unit connector
B143 terminals 21, 32 and ground.

OK or NG

OK

>> Replace front lifting motor.

NG

>> Repair or replace harness between driver seat control unit and front lifting motor.

Connector

Terminals

 (Wire color)

Condition

Signal

(Reference value)

(+)

(–)

B143

21 (Y/B)

Ground

Front 
lifting motor 
operation

PIIA4143E

PIIA3278E

21 (Y/B) – 21 (Y/B)

: Continuity should exist.

32 (R/W) – 32B (R/W)

: Continuity should exist.

21 (Y/B) – Ground

:Continuity should not exist.

32 (R/W) – Ground

:Continuity should not exist.

PIIA4145E

SE-66

AUTOMATIC DRIVE POSITIONER

Check Rear Lifting Sensor Circuit

NIS0012Z

1. 

CHECK REAR LIFTING SENSOR MECHANISM

Check the operation malfunction caused by lifter mechanism deformation or parts are loose.
OK or NG

OK

>> GO TO 2.

NG

>> Repair the malfunctioning part and check again.

2. 

CHECK REAR LIFTING SENSOR INPUT/OUTPUT SIGNAL

1.

Turn ignition switch OFF.

2.

Check signal between driver seat control unit connector ground
with oscilloscope.

OK or NG

OK

>> System is OK.

NG

>> GO TO 3.

3. 

CHECK HARNESS CONTINUITY

1.

Disconnect driver seat control unit connector and rear lifting motor connector.

2.

Check continuity between driver seat control unit connector
B143 terminals 31, 32 and rear lifting motor connector B149 ter-
minals 31, 32C.

3.

Check continuity between driver seat control unit connector
B143 terminals 31, 32 and ground.

OK or NG

OK

>> Replace rear lifting motor.

NG

>> Repair or replace harness between driver seat control unit and rear lifting motor.

Connector

Terminals 

(Wire color)

Condition

Signal

(Reference value)

(+)

(–)

B143

31 (W/R)

Ground

Rear 
lifting motor 
operation

PIIA4146E

SIIA0693J

31 (W/R) – 31 (W/R)

: Continuity should exist.

32 (R/W) – 32C (R/W)

: Continuity should exist.

31 (W/R) – Ground

:Continuity should not exist.

32 (R/W) – Ground

:Continuity should not exist.

PIIA4142E