Infiniti F50. Manual - part 225

AUTO TRUNK SYSTEM

BL-147

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Trunk Open Signal Check

EIS00561

1. 

CHECK REMOTE CONTROL TRUNK OPEN SIGNAL

Check voltage between auto trunk control unit connector and ground.

OK or NG

OK

>> Trunk open signal is OK.

NG

>> GO TO 2.

2. 

CHECK HARNESS CONTINUITY

1.

Turn ignition switch OFF.

2.

Disconnect BCM and auto trunk control unit connector.

3.

Check continuity between BCM connector M4 terminal 1 and auto trunk control unit connector B110 termi-
nal 5.

OK or NG 

OK

>> GO TO 3.

NG

>> Repair or replace harness between BCM and auto trunk

control unit.

3. 

CHECK AUTO TRUNK CONTROL UNIT OUTPUT SIGNAL

Check voltage between auto trunk control unit connector B110 terminal 5 and ground.

OK or NG

OK

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

NG

>> Replace auto trunk control unit.

Connector

Terminals (Wire color)

Condition

Voltage (V)

(Approx.)

(+)

(-)

B110

5 (G/Y)

Ground

Remote controller trunk 
switch ON

5 

→

 0 

→

 5

Other than above 

5

PIIA2965E

1 (G/Y) – 5 (G/Y)

: Continuity should exist.

PIIA2966E

5 (G/Y) – Ground

: Approx. 5V

PIIA2965E

BL-148

AUTO TRUNK SYSTEM

Encoder Circuit Check

EIS00562

1. 

CHECK ENCODER POWER SUPPLY

Check voltage between auto trunk motor connector B109 terminal 5 and ground.

OK or NG

OK

>> GO TO 3.

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 14 and auto trunk motor con-
nector B109 terminal 5.

OK or NG

OK

>> Replace auto trunk control unit.

NG

>> Repair or replace harness between auto trunk control

unit and auto trunk motor.

3. 

CHECK ENCODER GROUND

1.

Turn ignition switch OFF.

2.

Disconnect auto trunk motor connector.

3.

Check continuity between auto trunk motor connector B109 terminal 9 and ground.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 4.

5 (L/R) – Ground

: Battery voltage

PIIA2967E

14 (L/R) – 5 (L/R)

: Continuity should exist.

PIIA2968E

9 (R/W) – Ground

: Continuity should exist.

PIIA2969E

AUTO TRUNK SYSTEM

BL-149

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BL

4. 

CHECK ENCODER GROUND CIRCUIT

1.

Disconnect auto trunk control unit.

2.

Check continuity between auto trunk control unit connector B110 terminal 16 and auto trunk motor con-
nector B109 terminal 9.

OK or NG

OK

>> Replace auto trunk control unit.

NG

>> Repair or replace harness between auto trunk control

unit and auto trunk motor.

5. 

CHECK ENCODER SIGNAL

1.

Connect auto trunk motor connector.

2.

Turn ignition switch ON.

3.

Check the signal between auto trunk control unit connector and ground with oscilloscope.

OK or NG

OK

>> Encoder function is OK.

NG

>> GO TO 6.

6. 

CHECK ENCODER CIRCUIT

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 15 and auto trunk motor con-
nector B109 terminal 8.

OK or NG

OK

>> Replace auto trunk motor.

NG

>> Repair or replace harness between auto trunk control

unit and auto trunk motor.

16 (R/W) – 9 (R/W)

: Continuity should exist.

PIIA2970E

Connector

Terminals (Wire color)

Condition 

Signal

(Reference value)

(+)

(-)

B110 15 

(Y)

Ground

trunk motor 
operation

PIIA2971E

OCC3383D

15 (Y) – 8 (Y)

:Continuity should exist.

PIIA2972E

BL-150

VEHICLE SECURITY (THEFT WARNING) SYSTEM

VEHICLE SECURITY (THEFT WARNING) SYSTEM

PFP:28491

Component Parts Harness Connector Location

EIS003Q3

PIIB0199E