Infiniti M35/M45 Y50. Manual - part 291

VEHICLE SECURITY (THEFT WARNING) SYSTEM

BL-233

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Trouble Diagnosis Symptom Chart

NIS00204

*: Make sure the system is in the armed phase.

Procedure

Diagnostic procedure

Refer to page

Symptom

1

Vehicle security 
system cannot be 
set by ····

Door switch

Diagnostic Procedure 1 (Check door, hood and trunk switch) 

BL-234

Lock / unlock switch

Diagnostic Procedure 6 (Check door lock / unlock switch)

BL-243

Door outside key

Diagnostic Procedure 3 (Check door key cylinder switch)

BL-242

Intelligent Key

Check Intelligent Key.

BL-124

—

If the above systems are “OK”, replace BCM.

BCS-15

Security indicator does not turn “ON”.

Diagnostic Procedure 2 (Check security indicator lamp)

BL-241

If the above systems are “OK”, replace BCM.

BCS-15

2

* Vehicle security 
system does not 
alarm when ····

Any door is opened.

Diagnostic Procedure 1 (Check door, hood and trunk switch)

BL-234

If the above systems are “OK”, replace BCM.

BCS-15

3

Vehicle security 
alarm does not 
activate.

Horn alarm

Diagnostic Procedure 4 (Check vehicle security horn alarm)

BL-242

If the above systems are “OK”, replace BCM.

BCS-15

Head lamp alarm

Diagnostic Procedure 5 (Check head lamp alarm)

BL-243

If the above systems are “OK”, replace BCM.

BCS-15

Hazard lamp

Diagnostic Procedure 7 (Check hazard lamp alarm)

BL-243

If the above systems are “OK”, replace BCM.

BCS-15

4

Vehicle security 
system cannot be 
canceled by ····

Door outside key

Diagnostic Procedure 3 (Check door key cylinder switch)

BL-242

If the above systems are “OK”, replace power window main 
switch.

EI-34

Intelligent Key

Check remote keyless entry function.

BL-43

If the above systems are “OK”, replace BCM.

BCS-15

BL-234

VEHICLE SECURITY (THEFT WARNING) SYSTEM

Diagnostic Procedure 1

NIS00205

DOOR SWITCH CHECK

1. 

CHECK DOOR SWITCH INPUT SIGNAL

 With CONSULT-II

Check door switches (“DOOR SW-DR”, “DOOR SW-AS”, “DOOR SW-RL” and “DOOR SW-RR”) in “DATA
MONITOR” mode with CONSULT-II.

 Without CONSULT-II

1.

Turn ignition switch OFF.

2.

Check voltage between BCM connector and ground.

OK or NG

OK

>> Door switch circuit is OK.

NG

>> GO TO 2.

Monitor item

Condition

DOOR SW-DR

CLOSE 

→

 OPEN: OFF 

→

 ON

DOOR SW-AS

DOOR SW-RL

DOOR SW-RR

PIIA6469E

Terminals

Door condition

Voltage (V)

(Approx.)

(+)

(–)

BCM

connector

Terminal

M1

12

Ground

Front 

passenger 

side

OPEN

0

CLOSE

Battery voltage

13

Rear RH 

side

OPEN

0

CLOSE

Battery voltage

M3

62

Driver side

OPEN

0

CLOSE

Battery voltage

63

Rear LH 

side

OPEN

0

CLOSE

Battery voltage

PIIB6324E

VEHICLE SECURITY (THEFT WARNING) SYSTEM

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2. 

CHECK DOOR SWITCH

1.

Turn ignition switch OFF.

2.

Disconnect door switch connector.

3.

Check door switch.

OK or NG

OK

>> GO TO 3.

NG

>> Replace malfunction door switch.

3. 

CHECK DOOR SWITCH CIRCUIT 

1.

Disconnect BCM connector.

2.

Check continuity between BCM connector and door switch connector.

3.

Check continuity between BCM connector and ground.

OK or NG

OK

>> GO TO 4.

NG

>> Repair or replace harness between BCM and door

switch.

Terminal

Door switch

Continuity

Door switch

2

Ground part of 

door switch

Pushed

No

Released

Yes

PIIB5977E

A

B

Continuity 

BCM connector

Terminal

Door switch

connector

Terminal

M1

12

B424

2

Yes

13

B403

M3

62

B11

63

B53

A

Ground

Continuity 

BCM connector

Terminal

M1

12

No

13

M3

62

63

PIIB6325E

BL-236

VEHICLE SECURITY (THEFT WARNING) SYSTEM

4. 

CHECK BCM OUTPUT SIGNAL

1.

Connect BCM connector.

2.

Check voltage between BCM connector and ground.

OK or NG

OK

>> Check the condition of harness and connector.

NG

>> Replace BCM.

Terminals

Voltage (V)

(Approx.)

(+)

(–)

BCM connector

Terminal

M1

12

Ground

Battery voltage

13

M3

62

63

PIIB6324E