Infiniti F50. Manual — part 230

VEHICLE SECURITY (THEFT WARNING) SYSTEM

BL-167

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Preliminary Check

EIS003Q9

The system operation is canceled by turning ignition switch to “ACC” at any step between START and ARMED
in the following flow chart.
NOTE:
Before performing PRELIMINARY CHECK, disconnect IVCS unit connectors not to operate INFINITI commu-
nicator.

After performing preliminary check, go to symptom chart.

PIIA2861E

BL-168

VEHICLE SECURITY (THEFT WARNING) SYSTEM

Symptom Chart

EIS003QA

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

PROCEDURE

Diagnostic procedure

SYMPTOM

1

Vehicle security
system cannot be
set by ····

All items

●

Door key cylinder

●

Electronic key

Diagnostic Procedure 1 (Check door, hood and trunk room lamp switch)
Refer to

BL-169, "Diagnostic Procedure 1"

.

Diagnostic Procedure 3 (Check door unlock sensor)
Refer to

BL-174, "Diagnostic Procedure 3"

.

Diagnostic Procedure 5 (Check trunk lid key unlock signal)
Refer to

BL-180, "Diagnostic Procedure 5"

.

Diagnostic Procedure 8 (Check ACC power supply)
Refer to

BL-184, "Diagnostic Procedure 8"

.

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

Door key cylinder

Diagnostic Procedure 4 (Check door key cylinder switch)
Refer to

BL-177, "Diagnostic Procedure 4"

.

If the above systems are “OK”, check driver door control unit (LCU01).

Security indicator does not turn “ON”.

Diagnostic Procedure 2 (Check security indicator lamp)
Refer to

BL-173, "Diagnostic Procedure 2"

.

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

2

*1
Vehicle security
system does not
alarm when ····

Any door is opened.

Diagnostic Procedure 1 (Check door, hood and trunk room lamp switch)
Refer to

BL-169, "Diagnostic Procedure 1"

.

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

Any door is unlocked without
using electronic key

Diagnostic Procedure 3 (Check door unlock sensor)
Refer to

BL-174, "Diagnostic Procedure 3"

.

If the above system is “OK”, check driver door control unit (LCU01) or door
control unit.

3

Vehicle security
alarm does not
activate.

Horn alarm

Diagnostic Procedure 6 (Check theft warning horn alarm)
Refer to

BL-181, "Diagnostic Procedure 6"

.

If the above systems are “OK”, check horn system.
Refer to

WW-29, "HORN"

.

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

Headlamp alarm

Diagnostic Procedure 7 (Check headlamp alarm)
Refer to

BL-183, "Diagnostic Procedure 7"

.

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

4

Vehicle security
system cannot be
canceled by ····

Door key cylinder

Diagnostic Procedure 4 (Check door key cylinder switch)
Refer to

BL-177, "Diagnostic Procedure 4"

.

If the above systems are “OK”, check driver door control unit (LCU01).

Trunk lid key cylinder

Diagnostic Procedure 5 (Check trunk lid key cylinder switch)
Refer to

BL-180, "Diagnostic Procedure 5"

.

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

VEHICLE SECURITY (THEFT WARNING) SYSTEM

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Diagnostic Procedure 1

EIS003QB

1 – 1 CHECK FRONT DOOR SWITCH

1.

CHECK FRONT DOOR SWITCH INPUT SIGNAL

With CONSULT-II

Check front door switch (“DOOR SW-DR” and “DOOR SW-AS”) in “DATA MONITOR” mode with CONSULT-II.

Without CONSULT-II

Check front door switch in “SWITCH MONITOR” mode.Refer to

BL-80, "SWITCH MONITOR"

.

OK or NG

OK

>> Front door switch is OK.

NG

>> GO TO 2

2.

CHECK FRONT DOOR SWITCH

1.

Turn ignition switch OFF.

2.

Disconnect front door switch connector and BCM connector.

3.

Check continuity between front door switch connector B20 (driver), B220 (passenger) terminal 1 (W/R, W/
G) and BCM connector M4 (passenger), B4 (driver) terminal 37 (W/G), 142 (W/R).

4.

Check continuity between front door switch connector B20
(driver), B220 (passenger) terminal 1(W/R, W/G) and ground.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace harness.

Monitor item

Condition

DOOR SW-DR

OPEN

: ON

CLOSE

: OFF

DOOR SW-AS

OPEN

: ON

CLOSE

: OFF

PIIA2464E

Driver side door switch

1 (W/R) – 142 (W/R)

: Continuity should exist.

Passenger side door switch

1 (W/G) – 37 (W/G)

: Continuity should exist.

Each door switches

1 (W/R, W/G) – Ground

: Continuity should not exist.

PIIA3118E

BL-170

VEHICLE SECURITY (THEFT WARNING) SYSTEM

3.

CHECK FRONT DOOR SWITCH

Check continuity between front door switch connector B20, B220 ter-
minal 1 and ground part of door switch.

OK or NG

OK

>> Check door switch case ground.

NG

>> Replace malfunction front door switch.

1 – 2 CHECK REAR DOOR SWITCH

1.

CHECK REAR DOOR SWITCH INPUT SIGNAL

With CONSULT-II

Check rear door switch (“DOOR SW-RR” and “DOOR SW-RL”) in “DATA MONITOR” mode with CONSULT-II.

Without CONSULT-II

Check front door switch in “SWITCH MONITOR” mode.Refer to

BL-80, "SWITCH MONITOR"

.

OK or NG

OK

>> Rear door switch is OK.

NG

>> GO TO 2

Terminal

Front door switch

Continuity

1

Ground part of

door switch

Pushed

NO

Released

YES

PIIA3351E

Monitor item

Condition

DOOR SW-RR

OPEN

: ON

CLOSE

: OFF

DOOR SW-RL

OPEN

: ON

CLOSE

: OFF

PIIA3117E