Infiniti Q45. Manual - part 219

AUTO TRUNK SYSTEM

BL-145

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Trunk Motor Check

NIS000WF

1. 

MOTOR OPERATION CHECK

Check voltage between auto trunk control unit connector and ground.

OK or NG 

OK

>> GO TO 2.

NG

>> Replace auto trunk control unit.

2. 

CHECK HARNESS CONTINUITY 

1.

Turn ignition switch OFF.

2.

Disconnect auto trunk control unit and auto trunk motor connectors.

3.

Check continuity between auto trunk control unit connector B111 terminals 20, 21 and auto trunk motor
connector B109 terminals 6, 7.

4.

Check continuity between auto trunk motor connector B109 ter-
minals 6, 7 and ground.

OK or NG

OK

>> Replace auto trunk motor.

NG

>> Repair or replace harness.

Clutch Solenoid Check

NIS000WG

1. 

CHECK CLUTCH SOLENOID POWER SUPPLY 

Check voltage between auto trunk motor connector B109 terminal 10
and ground.

OK or NG

OK

>> GO TO 2.

NG

>> Check the following.

●

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

●

Harness for open or short between auto trunk motor
and fuse.

Connector

Terminals (Wire color)

Condition

Voltage (V)

(Approx.)

(+)

(-)

B111

20 (G/W)

Ground

Trunk is closed

0

Trunk is opened

Battery voltage

21 (L/W)

Trunk is closed

Battery voltage

Trunk is opened

0

PIIA2946E

20 (G/W) – 7 (G/W)

: Continuity should exist.

21 (L/W) – 6 (L/W)

: Continuity should exist.

6 (L/W) – Ground

: Continuity should not exist.

7 (G/W) – Ground

: Continuity should not exist.

PIIB0246E

10 (PU) – Ground

: Battery voltage

PIIA2947E

BL-146

AUTO TRUNK SYSTEM

2. 

CHECK CLUTCH SOLENOID SIGNAL 

Check voltage between auto trunk control unit connector and ground.

OK or NG

OK

>> Clutch solenoid system is OK.

NG

>> GO TO 3.

3. 

CHECK HARNESS CONTINUITY

1.

Disconnect auto trunk control unit and auto trunk motor connector.

2.

Check continuity between auto trunk control unit connector B110
terminal 13 and auto trunk motor connector B109 terminal 3.

OK or NG

OK

>> Check the condition of the harness and the connector.

NG

>> Repair or replace harness.

Trunk Lid Close Switch Check

NIS000WH

1. 

CHECK TRUNK LID CLOSE SWITCH SIGNAL 

Check voltage between auto trunk control unit connector and ground.

OK or NG

OK

>> Trunk lid close switch is OK.

NG

>> GO TO 2.

Connector

Terminals (Wire color)

Condition

Voltage (V)

(Approx.)

(+)

(-)

B110 13 

(L/OR)

Ground

Trunk auto operation

0

Other than above

Battery voltage

PIIA2948E

13 (L/OR) – 3 (L/OR)

: Continuity should exist.

PIIA2949E

Connector

Terminals (Wire color)

Condition

Voltage (V)

(Approx.)

(+)

(-)

B110

8 (W/R)

Ground

Trunk lid close switch 
pressed (ON)

0

Other than above (OFF)

5

PIIB0190E

AUTO TRUNK SYSTEM

BL-147

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BL

2. 

CHECK HARNESS CONTINUITY 

1.

Turn ignition switch OFF.

2.

Disconnect auto trunk control unit and trunk lid close switch connector.

3.

Check continuity between auto trunk control unit connector B110 terminal 8 and trunk lid close switch con-
nector B309 terminal 2.

4.

Check continuity between auto trunk control unit connector B110
terminal 8 and ground.

OK or NG 

OK

>> GO TO 3.

NG

>> Repair or replace harness.

3. 

CHECK TRUNK LID CLOSE SWITCH 

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

OK or NG

OK

>> GO TO 4.

NG

>> Replace trunk lid close switch.

4. 

TRUNK LID CLOSE SWITCH GROUND CIRCUIT CHECK

Check continuity between trunk lid close switch connector B309 terminal 1 and ground.

OK or NG

OK

>> Replace auto trunk control unit.

NG

>> Repair or replace harness.

8 (W/R) – 2 (W/R)

: Continuity should exist.

8 (W/R) – Ground

: Continuity should not exist.

PIIB0247E

Terminals

Condition

Continuity 

1

2

Trunk lid switch pressed (ON)

Yes

Other than above

No

PIIB0191E

1 (B) – Ground

: Continuity should exist.

PIIB0192E

BL-148

AUTO TRUNK SYSTEM

Weather Strip Detection Switch System Check

NIS000WI

1. 

CHECK WEATHER STRIP DETECTION SWITCH SIGNAL

Check voltage between auto trunk control unit connector and ground.

OK or NG

OK

>> Weather strip detection switch is OK.

NG

>> GO TO 2.

2. 

CHECK HARNESS CONTINUITY

1.

Turn ignition switch OFF.

2.

Disconnect auto trunk control unit and auto trunk motor connector.

3.

Check continuity between auto trunk control unit connector B110 terminal 10 and auto trunk motor con-
nector B109 terminal 1.

4.

Check continuity between auto trunk control unit connector B110
terminal 10 and ground.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace harness between auto trunk control

unit and auto trunk motor.

3. 

CHECK GROUND CIRCUIT 

Check continuity between trunk motor connector B109 terminal 4 and ground.

OK or NG

OK

>> GO TO 4.

NG

>> Repair or replace harness.

Connector

Terminals (Wire color)

Condition

Voltage (V)

(Approx.)

(+)

(-)

B110 10 

(Y/B)

Ground

Trunk lid fully is between 
just before fully closed 
position and fully closed 
position (OFF)

5

Other than above

0

PIIA2954E

10 (Y/B) – 1 (Y/B)

: Continuity should exist.

10 (Y/B) – Ground

: Continuity should not exist.

PIIB0248E

4 (B) – Ground

: Continuity should exist.

PIIA2956E