Infiniti F50. Manual - part 223

AUTO TRUNK SYSTEM

BL-139

C

D

E

F

G

H

J

K

L

M

A

B

BL

3. 

CHECK DETENTION SWITCH

Check continuity between detention switch terminals 6 and 7.

OK or NG

OK

>> GO TO 4.

NG

>> Replace A/T device.

4. 

CHECK HARNESS CONTINUITY 

1.

Disconnect key switch connector.

2.

Check continuity between detention switch connector M97 terminal 6 and key switch connector M64 ter-
minal 4.

3.

Check continuity between detention switch connector M97 ter-
minal 6 and ground.

OK or NG

OK

>> GO TO 5.

NG

>> Repair or replace harness.

5. 

CHECK KEY SWITCH

Check continuity between key switch terminals 3 and 4.

OK or NG

OK

>> Check the following.

●

10A fuse [No.8, located in fuse block (J/B) No.1]

●

Harness for open or short between key switch and
fuse.

NG

>> Repair or replace harness.

Terminals Condition

Continuity

6 7

A/T selector lever in P position

Yes

Other than above

No

PIIA2941E

6 (PU/W) – 4 (PU/W)

: Continuity should exist,

6 (PU/W) – Ground

: Continuity should not exist.

PIIA2942E

Terminals

Condition

Continuity

3

4

Key is inserted

Yes

Key is removed

No

PIIA2943E

BL-140

AUTO TRUNK SYSTEM

Trunk Motor Check

EIS0055V

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.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace harness between auto trunk control

unit and auto trunk motor.

Clutch Solenoid Check

EIS0055W

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)]

●

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.

PIIA2945E

10 (PU) – Ground

: Battery voltage

PIIA2947E

AUTO TRUNK SYSTEM

BL-141

C

D

E

F

G

H

J

K

L

M

A

B

BL

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 between auto trunk control

unit and auto trunk motor.

Trunk Lid Close Switch Check

EIS0055X

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

BL-142

AUTO TRUNK SYSTEM

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.

OK or NG 

OK

>> GO TO 3.

NG

>> Repair or replace harness between auto trunk control

unit and trunk lid close switch.

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

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

NG

>> Repair or replace harness.

8 (W/R) – 2 (W/R)

: Continuity should exist.

PIIA2951E

Terminals

Condition

Continuity 

1

2

Trunk lid switch pressed (ON)

Yes

Other than above

No

PIIB0191E

1 (B) – Ground

: Continuity should exist.

PIIB0192E