Infiniti M35/M45 Y50. Manual - part 241

POWER DOOR LOCK SYSTEM

BL-33

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Trouble Diagnosis Chart by Symptom

NIS001WY

Always check the “Work Flow” before troubleshooting. Refer to 

BL-31, "Work Flow"

 .

Symptom

Diagnoses service procedure

Reference 

page

Power door lock does not operate with door lock and unlock switch.

1.

Power supply and ground circuit check of 
BCM.

BL-34

2.

Check door lock and unlock switch.

BL-35

3.

Check door lock actuator (driver side)

BL-37

4.

Replace BCM.

BCS-15

Power door lock does not operate with door key cylinder operation.
(Power door lock operate properly with door lock and unlock 
switch.)

1.

Check front door key cylinder switch.

BL-41

2.

Replace power window main switch.

–

Specific door lock actuator does not operate.

1.

Check door lock actuator.

Driver side

BL-37

Passenger side

BL-38

Rear LH

BL-39

Rear RH

BL-39

2.

Replace BCM.

BCS-15

Selective unlock operation does not operate.
(All other power door lock system is “OK”.)

1.

Check select unlock mode.
Select unlock mode can be changed.
First check select unlock mode.

BL-81

2.

Replace BCM.

BCS-15

Fuel lid opener actuator does not operate.
(All door lock actuators operates properly.)

Check fuel lid lock actuator.

BL-40

BL-34

POWER DOOR LOCK SYSTEM

Power Supply and Ground Circuit Check of BCM

NIS001WZ

1. 

CHECK FUSE

Check the following fuse and fusible link.

●

50A fusible link (letter F , located in the fuse and fusible link box)

●

10A fuse [No.21, located in the fuse block (J/B)]

●

10A fuse [No.6, located in the fuse block (J/B)]

●

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

NOTE:
Refer to 

BL-24, "Component Parts and Harness Connector Location"

 .

OK or NG

OK

>> GO TO 2.

NG

>> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse, refer to 

PG-

3, "POWER SUPPLY ROUTING CIRCUIT"

 .

2. 

CHECK POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect BCM connectors.

3.

Check voltage between BCM and ground.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace BCM power supply circuit.

3. 

CHECK GROUND CIRCUIT

Check continuity between BCM harness connector and ground.

OK or NG

OK

>> Power supply and ground circuit are OK.

NG

>> Repair or replace BCM ground circuit.

Terminals

Condition 
of ignition 

switch 

position

Voltage (V)

(Approx.)

(+)

(–)

BCM connector

Terminal

M3

11

Ground

ACC

Battery voltage

38

ON

M2

42

OFF

55

PIIB6296E

BCM connector

Terminal

Continuity

M2

52

Ground

Yes

PIIB5935E

POWER DOOR LOCK SYSTEM

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Check Door Lock and Unlock Switch 

NIS001X0

1. 

CHECK POWER WINDOW SWITCH OUTPUT SIGNAL

With CONSULT-II

Check (“CDL LOCK SW ”, “CDL UNLOCK SW”) in DATA MONITOR mode with CONSULT-II.

Without CONSULT-II

1.

Remove key from ignition switch, and the door of driver side and passenger side is closed.

2.

Check signal between BCM connector and ground with oscilloscope when door lock and unlock switch
(driver side and passenger side) is turned “LOCK” or “UNLOCK”.

3.

Make sure signals which are shown in the figure below can be detected during 10 second just after door
lock and unlock switch (driver side and passenger side) is turned “LOCK” or “UNLOCK”.

OK or NG

OK

>> Door lock and unlock switch is OK.

NG

>> GO TO 2.

Monitor item

Condition

CDL LOCK SW 

LOCK

: ON

UNLOCK

: OFF

CDL UNLOCK SW 

LOCK

: OFF

UNLOCK

: ON

PIIA7068E

Terminal

Signal

(Reference value)

(+)

(–)

BCM connector

Terminal 

M1

22

Ground

PIIB5957E

PIIA1297E

BL-36

POWER DOOR LOCK SYSTEM

2. 

CHECK POWER WINDOW SWITCH GROUND 

1.

Turn ignition switch OFF.

2.

Disconnect power window main switch and front power window switch (passenger side) connector.

3.

Check continuity between power window main switch connector and ground.

4.

Check continuity between power window sub-switch (front passenger side) connector and ground.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace harness.

3. 

CHECK POWER WINDOW SERIAL LINK CIRCUIT

1.

Disconnect BCM connector.

2.

Check continuity between BCM connector and power window main switch connector.

3.

Check continuity between BCM connector and power window sub-switch (front passenger side) connec-
tor.

OK or NG

OK

>> Replace power window main switch.

NG

>> Repair or replace harness.

Power window main 

switch connector

Terminal

Continuity 

D11

17

Ground

Yes

PIIB5937E

Power window 

sub-switch 

(front passenger side) 

connector

Terminal

Continuity 

D46

11

Ground

Yes

PIIB5941E

A

B

Continuity 

BCM connector

Terminal

Power window 

main switch

connector

Terminal

M1

22

D10

14

Yes

PIIB5958E

A

B

Continuity 

BCM connector

Terminal

Power window 

sub- switch 

(front passenger side)

 connector

Terminal

M1

22

D46

16

Yes

PIIB5959E