Infiniti FX35 / FX45. Manual - part 221

 

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Infiniti FX35 / FX45. Manual - part 221

 

 

BACK DOOR AUTO CLOSURE SYSTEM

BL-151

< SERVICE INFORMATION >

C

D

E

F

G

H

J

K

L

M

A

B

BL

N

O

P

TIWM1672E

BL-152

< SERVICE INFORMATION >

BACK DOOR AUTO CLOSURE SYSTEM

Terminal and Reference Value for Back Door Closure Control Unit

INFOID:0000000001327891

*, (): Models with Intelligent Key

Termi-

nal

Wire 

color

Item

Signal 

Input/

output

Condition

Voltage (V)

(Approx.)

1

R

Power source (Fuse)

Input

Battery voltage

2

PU

Closure motor (open) signal

Output

Fully close 

 fully open

3

G

Closure motor (close) signal

Output

Fully open 

 fully close

4

B

Ground

0

5

W

(B)

Ground*

0*

Unlock sensor signal
(passenger side)

Input

Passenger side door lock is locked

5

Passenger side door lock is un-
locked

0

6

Y

(LG)

Back door opener switch sig-
nal

Input

Back door opener switch is ON

0

Other than above

5

7

OR

Half-latch switch signal

Input

Fully open 

 fully close

8

L

Close switch signal

Input

Fully open 

 fully close

9

P

Open switch signal 

Input

Fully open 

 fully close

SIIA1480J

SIIA1480J

SIIA1479J

SIIA1478J

SIIA1481J

BACK DOOR AUTO CLOSURE SYSTEM

BL-153

< SERVICE INFORMATION >

C

D

E

F

G

H

J

K

L

M

A

B

BL

N

O

P

Work Flow

INFOID:0000000001327892

1.

Check the symptom and customer's requests.

2.

Understand the outline of system. Refer to 

BL-148, "System Description"

.

3.

Perform the preliminary check, Refer to 

BL-153, "Preliminary Check"

4.

According to the trouble diagnosis chart, repair or replace the cause of the malfunction. Refer to 

BL-153,

"Trouble Diagnosis Chart by Symptom"

.

5.

Does back door auto closure system operate normally? If Yes, GO TO 6, If No, GO TO 4.

6.

INSPECTION END

Preliminary Check

INFOID:0000000001327893

Remove the fuse No.18 for the back door closure with the back door closure inactive.
Check that the back door can be open / close normally.

CAUTION:

It is judged it is abnormal, discontinues closure operation, and drive lever returns to a neutral position
if not becoming full-latch within about three seconds after half-latch.
When this operation is done continuously three times, both back door closure and back door opener
switch are not operated because the function of back door closure is stopped.
Thing to reset power supply by pulling out and opening fuse in that case.

Trouble Diagnosis Chart by Symptom

INFOID:0000000001327894

Check Back Door Closure Control Unit Power Supply and Ground Circuit

INFOID:0000000001327895

1.

CHECK POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Check voltage between back door closure control unit connector
D106 terminal 1 and ground.

OK or NG

OK

>> GO TO 2.

NG

>>

Check the following.

• 15A fuse [No.18, located in fuse block (J/B)]
• Harness for open or short between back door closure

control unit and fuse.

Symptom

Diagnostic procedure and repair order

Refer to page

Back door closure does not operate.

1. Check back door closure motor power supply and 
ground circuit 

BL-153

2. Check half-latch switch

BL-154

3. Check close switch

BL-155

4. Check open switch

BL-156

5. Check closure motor

BL-161

6. Replace back door closure control unit.

BL-162

Back door does not open (with Intelligent Key system).

1. Check Intelligent Key system

BL-103

2. Check back door opener switch

BL-157

Back door does not open

1. Check back door opener switch

BL-159

2. Check unlock sensor

BL-160

3. Replace back door closure control unit.

BL-162

Back door does not enter fully closed states through 
back door closure operates.

1. Back door fitting adjustment.

BL-141

2. Replace back door lock assembly.

BL-146

1 (R) – Ground

: Battery voltage

PIIA6166E

BL-154

< SERVICE INFORMATION >

BACK DOOR AUTO CLOSURE SYSTEM

2.

CHECK GROUND CIRCUIT

1.

Disconnect back door closure control unit connector.

2.

Check continuity between back door closure control unit con-
nector D106 terminal 4 and ground.

OK or NG

OK

>> Power supply and ground circuit are OK.

NG

>> Repair or replace harness.

Check Half-Latch Switch

INFOID:0000000001327896

1.

CHECK HALF-LATCH SWITCH SIGNAL

1.

Turn ignition switch OFF.

2.

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

OK or NG

OK

>> Half-latch switch is OK.

NG

>> GO TO 2.

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 terminal 7 and back door closure motor connector
D109 terminal 6.

3.

Check continuity between back door closure control unit con-
nector D106 terminal 7 and ground.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace harness.

3.

CHECK GROUND CIRCUIT

4 (B) – Ground

: Continuity should exist.

PIIA6167E

Con-

nector

Terminals (Wire color)

Back door 

condition

Signal

(Reference value)

(+)

(-)

D106

7 (OR)

Ground

Fully open 

 

fully closed

PIIA6168E

SIIA1479J

7 (OR) – 6 (OR)

: Continuity should exist.

7 (OR) – Ground

: Continuity should not exist.

PIIA6169E

 

 

 

 

 

 

 

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