Infiniti Q45. Manual - part 215

TRUNK CLOSURE SYSTEM

BL-129

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Terminal and Reference Value for Trunk Closure Control Unit

NIS000VZ

*: The trunk room lamp illuminates.

Preliminary Check

NIS000W0

●

Remove the fuse No.15 for the trunk closure with the trunk closure inactive. Check that the trunk lid can
be open/closed normally with the trunk opener switch, trunk button on electronic key, or key in trunk key
cylinder.

Symptom Chart

NIS000W1

Closure Control Unit Power Supply and Ground Circuit Check

NIS000W2

1. 

POWER SUPPLY CIRCUIT CHECK

1.

Turn ignition switch OFF.

2.

Disconnect trunk closure control unit connector.

3.

Check voltage between trunk closure control unit connector B56 terminal 2 and ground.

OK or NG

OK

>> GO TO 2.

NG

>> Check the following.

●

20A fuse [No.15, located in the fuse block (J/B) No.1].

●

Harness for open or short between trunk closure con-
trol unit and fuse.

Terminal

Wire color

Item

Condition

Voltage (V)

(Approx.)

1 

P

Trunk lid lock switch signal

Engage the trunk lock (OFF)

 Battery voltage

Except than the above (ON)

0

2 

PU

Power source (Fuse)

—

Battery voltage

3 

P/L

Trunk lid striker switch signal

Pressed  the striker switch lever (OFF)

Battery voltage

Except than the above (ON)

0*

4 B

Ground

—

 

0

5 

—

Trunk closure motor ground

—

 0

6

—

Trunk closure motor output signal 

Trunk closure motor is operation

Battery voltage

Except than the above 

0

Symptom

Malfunctioning system

Reference 

page

Trunk closure does not operate
 (opening/closing)

Trunk closure control unit power supply and ground circuit check.

BL-129

Trunk lid lock switch check.

BL-130

Trunk lid striker switch check.

BL-131

If above systems are “OK”, replace closure control unit.

—

Trunk closure does not operate.
(Trunk room lamp illuminates / goes off with the 
striker switch ON-OFF operation.)

Replace closure control unit.

—

Trunk closure does not stop.

Replace closure control unit (stop switch is malfunction).

—

Malfunctioning trunk closure stop position.

2 (PU) – Ground

: Battery voltage

PIIA2806E

BL-130

TRUNK CLOSURE SYSTEM

2. 

GROUND CIRCUIT CHECK

Check continuity between trunk closure control unit connector B56 terminal 4 and ground.

OK or NGF

OK

>> Power supply and ground circuit is OK.

NG

>> Repair or replace harness.

Trunk Lid Lock Switch Check

NIS000W3

1. 

TRUNK LID LOCK SWITCH SIGNAL CHECK

1.

Turn ignition switch OFF.

2.

Check voltage between trunk closure control unit connector and ground.

OK or NG

OK

>> Trunk lid lock switch is OK.

NG

>> GO TO 2.

2. 

 TRUNK LID LOCK SWITCH CIRCUIT CHECK

1.

Disconnect trunk closure control unit and trunk lid lock switch connector.

2.

Check continuity between trunk closure control unit connector B56 terminal 1 and trunk lid lock switch
connector B312 terminal 1.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace harness.

4 (B) – Ground

: Continuity should exist.

PIIA2807E

Terminals

Condition

Voltage (V)

(Approx.)

( + )

( – )

Connector

Terminal

(Wire color)

Ground

B56

1 (P)

Engage the latch 
of trunk lock (OFF)

Battery voltage

Other than the 
above (ON)

0

PIIA2808E

1 (P) – 1 (P)

: Continuity should exist.

PIIA3071E

TRUNK CLOSURE SYSTEM

BL-131

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B

BL

3. 

TRUNK LID LOCK SWITCH GROUND CIRCUIT CHECK

Check continuity between trunk lid lock switch connector B312 terminal 2 and ground.

OK or NG

OK

>> GO TO 4.

NG

>> Repair or replace harness.

4. 

TRUNK LID LOCK SWITCH CHECK

Check continuity between trunk lid lock switch terminals 1 and 2.

OK or NG

OK

>> Replace trunk closure control unit.

NG

>> Replace trunk lid lock switch.

Trunk Lid Striker Switch Check

NIS000W4

1. 

TRUNK LID STRIKER SWITCH SIGNAL CHECK

1.

Turn ignition switch OFF.

2.

Check voltage between trunk closure control unit connector and ground.

OK or NG

OK

>> Trunk lid striker switch is OK.

NG

>> GO TO 2.

2 (B/W) – Ground

: Continuity should exist.

PIIA3072E

Terminals

Condition

Continuity

1

2

Trunk is closed

No

Trunk is opened

Yes

PIIA3073E

Terminals

Condition

Voltage (V)

(Approx.)

( + )

( – )

Connector

Terminal

(Wire color)

Ground

B56

3 (P/L)

Pressed the striker 
switch lever (OFF)

Battery voltage

Other than the 
above (ON)

0

PIIA3074E

BL-132

TRUNK CLOSURE SYSTEM

2. 

TRUNK LID STRIKER SWITCH CIRCUIT CHECK

1.

Disconnect trunk closure control unit and trunk lid striker switch connector.

2.

Check continuity between trunk closure control unit connector B56 terminal 3 and trunk lid striker switch
connector B55 terminal 1.

OK or NG

OK

>> GO TO 3

NG

>> Repair or replace harness.

3. 

TRUNK LID STRIKER SWITCH GROUND CIRCUIT CHECK

Check continuity between trunk lid striker switch connector B55 terminal 2 and ground.

OK or NG

OK

>> GO TO 4.

NG

>> Repair or replace harness.

4. 

TRUNK LID STRIKER SWITCH CHECK

Check continuity between trunk lid striker switch terminals 1 and 2.

OK or NG

OK

>> Replace trunk closure control unit.

NG

>> Replace trunk lid striker switch.

3 (P/L) – 1 (P/L)

: Continuity should exist

PIIA3075E

2 (B) – Ground

: Continuity should exist

PIIA3076E

Terminals

Condition

Continuity

1

2

Pressed the striker switch lever (OFF)

No

Other then the above (ON)

Yes

PIIA3077E