Infiniti F50. Manual - part 768

AUTOMATIC DRIVE POSITIONER

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3. 

CHECK HARNESS CONTINUITY

1.

Turn ignition switch OFF. 

2.

Disconnect BCM connector and tilt motor connector.

3.

Check continuity between BCM connector M4 terminals 102 (P), 103 (R/B) and tilt motor connector M58
terminals 1 (R/B), 2 (P).

4.

Check continuity between BCM connector M4 terminals 102 (P),
103 (R/B) and ground.

OK or NG

OK

>> GO TO 4.

NG

>> Repair or replace harness between BCM and tilt motor.

4. 

CHECK BCM OUTPUT SIGNAL

1.

Connect BCM connector and tilt motor connector.

2.

Check voltage between BCM connector.

OK or NG

OK

>> Replace tilt motor.

NG

>> Replace BCM.

Seat Sliding Sensor Circuit Inspection

EIS0041T

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.

102 (P) – 2 (P)

: Continuity should exist.

103 (R/B) – 1 (R/B)

: Continuity should exist.

102 (P) – Ground

:Continuity should not exist.

103 (R/B) – Ground

:Continuity should not exist.

PIIA3266E

Connector

Terminals

 (Wire color)

Condition

Voltage (V) 

(Approx.)

(+)

(–)

M4

102 (P)

Ground

Tilt switch
(DOWN operation).

Battery voltage

Tilt switch OFF.

0

103 (R/B)

Tilt switch
(UP operation).

Battery voltage

Tilt switch OFF.

0

PIIA4385E

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AUTOMATIC DRIVE POSITIONER

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 (G/B), 32 (R/W) and sliding motor B146 ter-
minals 20 (G/B), 32A (R/W).

3.

Check continuity between driver seat control unit B143 terminals
20 (G/B), 32 (R/W) and ground.

OK or NG

OK

>> Replace sliding motor.

NG

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

Seat Reclining Sensor Circuit Inspection

EIS0041U

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.

Connector

Terminals 

(Wire color)

Condition

Signal

(+)

(–)

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

AUTOMATIC DRIVE POSITIONER

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D

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A

B

SE

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 (L), 32 (R/W) and reclining motor connector
B147 terminals 30 (L), 32 (R/W).

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

(+)

(–)

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

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AUTOMATIC DRIVE POSITIONER

Front Lifting sensor Circuit Inspection

EIS0041V

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 (Y/B), 32 (R/W) and front lifting motor con-
nector B148 terminals 21 (Y/B), 32B (R/W).

3.

Check continuity between driver seat control unit connector
B143 terminals 21 (Y/B), 32 (R/W) 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

(+)

(–)

B143

21 (Y/B)

Ground

Front lift-
ing 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