Infiniti F50. Manual - part 775

AUTOMATIC DRIVE POSITIONER

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4. 

CHECK HARNESS CONTINUITY

1.

Disconnect BCM connector.

2.

Check continuity between BCM connector M4 terminals 106
(BR/Y), 112 (L/W) and seat memory switch connector D3 termi-
nals 6 (BR/Y), 7 (L/W). 

3.

Check continuity between BCM connector M4 terminals 106
(BR/Y), 112 (L/W) and ground.

OK or NG

OK

>> GO TO 5.

NG

>> Repair or replace harness between BCM and memory switch.

5. 

CHECK SEAT MEMORY SWITCH INDICATOR SIGNAL

Check voltage between BCM connector M4 terminals 106 (BR/Y),
112 (L/W) and ground.

OK or NG

OK

>> Replace BCM.

NG

>> Replace seat memory switch.

Lumber Support Circuit Inspection

EIS0042B

1. 

CHECK LUMBER SUPPORT SWITCH

1.

Turn ignition switch OFF.

2.

Disconnect front power seat switch (driver side) connector.

3.

Check voltage between power seat switch (driver side) connec-
tor B144 terminal 16 (R) and ground.

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace harness between fuse block (J/B) and power seat switch (Driver side). 

106 (BR/Y) – 6 (BR/Y)

: Continuity should exist.

112 (L/W) – 7 (L/W)

: Continuity should exist.

106 (BR/Y) – Ground

: Continuity should not exist.

112 (L/W) – Ground

: Continuity should not exist.

PIIA4373E

106 (BR/Y) – Ground

: Battery voltage.

112 (L/W) – Ground

: Battery voltage.

PIIA3313E

16 (R) – Ground:

: Battery voltage.

PIIA3376E

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AUTOMATIC DRIVE POSITIONER

2. 

CHECK LUMBER SUPPORT SWITCH

Check continuity power seat switch.

OK or NG

OK

>> GO TO 3.

NG

>> The harness and connector is checked, and it is normal, replace power seat switch.

3. 

CHECK LUMBER SUPPORT MOTOR HARNESS

1.

Disconnect lumber support motor connector.

2.

Check continuity between power seat switch connector (driver
side) B144 terminal 3 (GY), 5 (W/B) and lumber support motor
connector B195 terminal 3 (GY), 5 (W/B).

3.

Check continuity between power seat switch connector (driver
side) B144 terminal 3 (GY), 5 (W/B) and ground.

OK or NG

OK

>> GO TO 4.

NG

>> Repair or replace harness between power seat switch (driver side) and lumber support motor.

4. 

 LUMBER SUPPORT SWITCH INSPECTION

Check continuity between power seat switch connector (driver side)
B144 terminal 14 (B/W) and ground.

OK or NG

OK

>> Check harness and connector.

NG

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

Con-

nector

Terminal

Condition

Continuity

(+)

(–)

B144

3 

16

Lumber support switch forward.

 Continuity should 

exist

14

Lumber support switch backward.

Continuity should 

exist

5 (W/

B)

16

Lumber support switch backward.

Continuity should 

exist

14

Lumber support switch forward.

Continuity should 

exist

PIIB0385E

3 (GY) 

−

 3 (GY)

:Continuity should exist.

5 (W/B) 

−

 5 (W/B)

:Continuity should exist.

3 (GY) 

−

 Ground

:Continuity should not exist.

5 (W/B) 

−

 Ground

:Continuity should not exist.

PIIA4375E

14 (B/W) – Ground

: Continuity should exist.

PIIA3297E

AUTOMATIC DRIVE POSITIONER

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Rear Power Seat Turnout Operation Inspection

EIS0042F

1. 

CHECK REAR POWER SEAR CONDITION

Front power window main switch operation normally when the power window is operated?
OK or NG

OK

>> GO TO 2.

NG

>> Check the power window system

GW-16, "POWER WINDOW SYSTEM"

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2. 

CHECK REAR POWER SEAT CONTROL UNIT HARNESS

1.

Turn ignition switch OFF.

2.

Disconnect rear LH door control unit connector and rear power
seat control unit LH connector.

3.

Check continuity between rear LH door control unit connector
B163 terminal 18 (BR/W) and rear power seat control unit LH
connector D58 terminal 12 (OR/L).

4.

Check continuity between rear LH door control unit connector
B163 terminal 18 (BR/W) and ground.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace harness between ear LH door control unit and rear power seat control unit LH.

3. 

CHECK REAR POWER SEAT AUTO RETURN SIGNAL

1.

Connect rear power seat control unit LH connector.

2.

Check voltage between rear LH door control unit connector and
ground.

OK or NG

OK

>> Replace rear power seat control unit LH.

NG

>> Replace rear LH door control unit.

18 (BR/W) 

−

 12 (OR/L)

:Continuity should exist.

18 (BR/W) 

−

 Ground

:Continuity should not exist.

PIIA4122E

Connector

Terminals 

(Wire color)

Condition

Voltage (V) 

(Approx.)

(+)

(–)

D58

12

(OR/L)

Ground

Driver side seat auto 
return operation (back 
ward)

0

When driver side seat auto 
return stops

Battery voltage

PIIA4121E

SE-94

POWER SEAT

POWER SEAT

PFP:87016

System Description

EIS000ZK

The rear power seat (LH / RH) retreats when the auto return cancel switch is turned on and each door is
opened.
When the slide switch turned on, or auto return cancel switch is canceled, an auto return is discontinued.
The LH seat moves backward when the driver seat is moved backward by the auto driving position system.
Refer to 

SE-13, "System Description"

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Power is all times supplied

●

through 40A fusible link [letter H, located in the fuse block (J/B)],

●

to front power seat passenger side terminal 16, and

●

to rear power seat control unit LH, rear power seat control unit RH terminal 2.

FRONT POWER SEAT (PASSENGER SIDE) OPERATION

When sliding switch is forward, power is supplied

●

through power seat switch terminal 1.

●

to sliding motor terminal 1,

Then ground is supplied

●

to sliding motor terminal 8,

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through power seat switch terminal 8,

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through power seat switch terminal 15A,

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through body grounds B217 and B256.

When power and ground are supplied, front passenger seat slide moves forward.
When sliding switch is backward, power is supplied

●

through power seat switch terminal 8.

●

to sliding motor terminal 8,

Then ground is supplied

●

to sliding motor terminal 1,

●

through power seat switch terminal 1,

●

through power seat switch terminal 15A,

●

through body grounds B217 and B256.

When power and ground are supplied, front passenger seat slide moves backward.
When reclining switch is forward, power is supplied

●

through power seat switch terminal 2.

●

to reclining motor terminal 2,

Then ground is supplied

●

to reclining motor terminal 9,

●

through power seat switch terminal 9,

●

through power seat switch terminal 15A,

●

through body grounds B217 and B256.

When power and ground are supplied, front passenger seat reclining moves forward.
When reclining switch is backward, power is supplied

●

through power seat switch terminal 9.

●

to reclining motor terminal 9,

Then ground is supplied

●

to reclining motor terminal 2,

●

through power seat switch terminal 2,

●

through power seat switch terminal 15A,

●

through body grounds B217 and B256.

When power and ground are supplied, front passenger seat reclining moves backward.
This seat does reclining backward.
When front lifting switch is upward, power is supplied