Infiniti FX35 / FX45. Manual - part 223

BACK DOOR AUTO CLOSURE SYSTEM

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< SERVICE INFORMATION >

C

D

E

F

G

H

J

K

L

M

A

B

BL

N

O

P

Check continuity between back door opener switch terminals 1 and
2.

OK or NG

OK

>> GO TO 6.

NG

>> Replace back door opener switch.

6.

CHECK BACK DOOR CLOSURE CONTROL UNIT OUTPUT SIGNAL

1.

Connect back door closure control unit connector.

2.

Check voltage between back door closure control unit connector
D106 terminal 6 and ground.

OK or NG

OK

>> Replace Intelligent Key unit.

NG

>> Replace back door closure control unit.

Check Back Door Opener Switch (Without Intelligent Key)

INFOID:0000000001327900

1.

CHECK BACK DOOR OPENER SWITCH SIGNAL

1.

Turn ignition switch OFF.

2.

Check voltage between back door closure control unit connector and ground.

OK or NG

OK

>> Back door opener switch is OK.

NG

>> GO TO 2.

2.

CHECK HARNESS CONTINUITY

1.

Disconnect back door closure control unit and back door opener switch connector.

2.

Check continuity between back door closure control unit con-
nector D106 terminal 6 and back door opener switch connector
D112 terminal 1.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace harness between back door closure

control unit and back door opener switch.

3.

CHECK GROUND CIRCUIT

Terminals

Condition

Continuity

1

2

Back door opener switch: ON

Yes

Back door opener switch: OFF

No

PIIA6181E

6 (LG) – Ground

: Approx. 5V

PIIA6178E

Connector

Terminals (Wire color)

Condition

Voltage (V)

(Approx.)

(+)

(-)

D106

6 (Y)

Ground

Back door opener switch 
: ON

0

Back door opener switch 
: OFF

5

PIIA6178E

6 (Y) – 1 (Y)

: Continuity should exist.

PIIA6179E

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< SERVICE INFORMATION >

BACK DOOR AUTO CLOSURE SYSTEM

Check continuity between back door opener switch connector D112
terminal 2 and ground.

OK or NG

OK

>> GO TO 4.

NG

>> Repair or replace harness.

4.

CHECK BACK DOOR OPENER SWITCH

Check continuity between back door opener switch terminals 1 and
2.

OK or NG

OK

>> GO TO 5.

NG

>> Replace back door opener switch.

5.

CHECK BACK DOOR CLOSURE CONTROL UNIT OUTPUT SIGNAL

1.

Connect back door closure control unit connector.

2.

Check voltage between back door closure control unit connector
D106 terminal 6 and ground.

OK or NG

OK

>> Check condition of harness and connector.

NG

>> Replace back door closure control unit.

Check Unlock Sensor (Without Intelligent Key)

INFOID:0000000001327901

1.

CHECK UNLOCK SENSOR SIGNAL

1.

Turn ignition switch OFF.

2.

Check voltage between back door closure control unit connector
and ground.

OK or NG

OK

>> Unlock sensor is OK.

NG

>> GO TO 2.

2.

CHECK HARNESS CONTINUITY

1.

Disconnect back door closure control unit and front door lock assembly (passenger side) connector.

2 (B) – Ground

: Continuity should exist.

PIIA6180E

Terminals

Condition

Continuity

1

2

Back door opener switch: ON

Yes

Back door opener switch: OFF

No

PIIA6181E

6 (Y) – Ground

: Approx. 5V

PIIA6178E

Connector

Terminals (Wire color)

Condition

Voltage (V)

(Approx.)

(+)

(-)

D106

5 (W)

Ground

Passenger side door lock is 
locked

5

Passenger side door lock is 
unlocked

0

PIIA6182E

BACK DOOR AUTO CLOSURE SYSTEM

BL-161

< SERVICE INFORMATION >

C

D

E

F

G

H

J

K

L

M

A

B

BL

N

O

P

2.

Check continuity between back door closure control unit con-
nector D106 terminal 5 and front door lock assembly (passenger
side) connector D40 terminal 5.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace harness between back door closure

control unit and front door lock assembly (passenger
side).

3.

CHECK GROUND CIRCUIT

Check continuity between front door lock assembly (passenger side)
connector D40 terminal 4 and ground.

OK or NG

OK

>> GO TO 4.

NG

>> Repair or replace harness.

4.

CHECK BACK DOOR CLOSURE CONTROL UNIT OUTPUT SIGNAL

1.

Connect back door closure control unit connector.

2.

Check voltage between back door closure control unit connector
D106 terminal 5 and ground.

OK or NG

OK

>> Replace front door lock assembly (passenger side).

NG

>> Replace back door closure control unit.

Check Closure Motor

INFOID:0000000001327902

1.

CHECK BACK DOOR CLOSURE MOTOR

1.

Turn ignition switch OFF.

2.

Check the signal between back door closure control unit connector and ground with oscilloscope.

OK or NG

OK

>> GO TO 2.

NG

>> Replace back door closure control unit.

5 (W) – 5 (W)

: Continuity should exist.

PIIA6183E

4 (B) – Ground

: Continuity should exist.

PIIA6184E

5 (W) – Ground

: Approx. 5V

PIIA6182E

Con-

nector

Terminals (Wire color)

Back door 

condition

Signal

(Reference value)

(+)

(-)

D106

2 (PU)

Ground

Fully closed 

→

 fully open

3 (G)

Fully open 

→

 

fully closed

PIIA6185E

SIIA1480J

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< SERVICE INFORMATION >

BACK DOOR AUTO CLOSURE SYSTEM

2.

CHECK HARNESS CONTINUITY

1.

Disconnect back door closure control unit and back door closure motor connector.

2.

Check continuity between back door closure control unit con-
nector D106 terminals 2, 3 and back door closure motor connec-
tor D109 terminals 1, 2.

3.

Check continuity between back door closure control unit con-
nector D106 terminals 2, 3 and ground.

OK or NG

OK

>> Replace back door closure motor.

NG

>> Repair or replace harness.

Removal and Installation of Back Door Closer Control Unit

INFOID:0000000001327903

1.

Remove the back door finisher.

EI-47, "Component Parts Location"

.

2.

Disconnect the back door closer control unit harness, remove the screw and back door closer control unit.

2 (PU) – 1 (PU)

: Continuity should exist.

3 (G) – 2 (G)

: Continuity should exist.

2 (PU) – Ground

: Continuity should not exist.

3 (G) – Ground

: Continuity should not exist.

PIIA6186E