Infiniti FX35, FX50 (S51). Manual — part 492

BACK DOOR REQUEST SWITCH

DLK-91

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

L

M

A

B

DLK

N

O

P

YES

>> Replace BCM. Refer to

BCS-83, "Removal and Installation"

.

NO

>> Repair or replace harness.

3.

CHECK BACK DOOR OPENER REQUEST SWITCH GROUND CIRCUIT

Check continuity between back door opener request switch harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace harness.

4.

CHECK BACK DOOR OPENER REQUEST SWITCH

Refer to

DLK-91, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace back door opener request switch. Refer to

EXT-49, "Removal and Installation"

.

5.

CHECK INTERMITTENT INCIDENT

Refer to

GI-36, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000005239584

1.

CHECK BACK DOOR OPENER REQUEST SWITCH

1.

Turn ignition switch OFF.

2.

Disconnect back door opener.

3.

Check back door opener request switch terminals.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace back door opener request switch. Refer to

EXT-49, "Removal and Installation"

.

Back door opener request switch assembly

Ground

Continuity

Connector

Terminal

D116

2

Existed

Back door opener request switch

Back door opener request switch condition

Continuity

Terminal

1

2

Pressed

Existed

Released

Not existed

DLK-92

< DTC/CIRCUIT DIAGNOSIS >

UNLOCK SENSOR

UNLOCK SENSOR

Description

INFOID:0000000005239585

Detects door lock condition of driver door.

Component Function Check

INFOID:0000000005239586

1.

CHECK FUNCTION

Check unlock sensor (“UNLK SEN -DR”) in “Data Monitor” mode.

Is the inspection result normal?

YES

>> Unlock sensor is OK.

NO

>> Refer to

DLK-92, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005239587

1.

CHECK BCM OUTPUT SIGNAL

1.

Turn ignition switch OFF.

2.

Disconnect front door lock assembly (driver side) connector.

3.

Check signal between front door lock assembly (driver side) harness connector and ground with oscillo-
scope.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK UNLOCK SENSOR CIRCUIT

1.

Disconnect BCM connector.

2.

Check continuity between BCM harness connector and front door lock assembly (driver side) harness
connector.

3.

Check continuity between BCM harness connector and ground.

Monitor item

Condition

UNLK SEN -DR

Front door lock (driver side) LOCK: OFF

Front door lock (driver side) UNLOCK: ON

(+)

(–)

Signal

(Reference value)

Front door lock assembly (driver side)

Connector

Terminal

D15

3

Ground

JPMIA0594GB

BCM

Front door lock assembly (driver side)

Continuity

Connector

Terminal

Connector

Terminal

M123

119

D15

3

Existed

BCM

Ground

Continuity

Connector

Terminal

M123

119

Not existed

UNLOCK SENSOR

DLK-93

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

L

M

A

B

DLK

N

O

P

Is the inspection result normal?

YES

>> Replace BCM. Refer to

BCS-83, "Removal and Installation"

.

NO

>> Repair or replace harness.

3.

CHECK UNLOCK SENSOR GROUND CIRCUIT

Check continuity between front door lock assembly (driver side) harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace harness.

4.

CHECK UNLOCK SENSOR

Refer to

DLK-93, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace front door lock assembly (driver side). Refer to

DLK-269, "DOOR LOCK : Removal and

Installation"

.

5.

CHECK INTERMITTENT INCIDENT

Refer to

GI-36, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000005239588

1.

CHECK UNLOCK SENSOR

1.

Turn ignition switch OFF.

2.

Disconnect front door lock assembly (driver side) (unlock sensor) connector.

3.

Check front door lock assembly (driver side) (unlock sensor) terminals.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace front lock assembly (driver side) (unlock sensor). Refer to

DLK-269, "DOOR LOCK :

Removal and Installation"

.

Front door lock assembly (driver side)

Ground

Continuity

Connector

Terminal

D15

4

Existed

Front door lock assembly (driver side) (unlock sensor)

Front door lock assembly (driver side) (unlock

sensor) condition

Continuity

Terminal

3

4

Unlock

Existed

Lock

Not existed

DLK-94

< DTC/CIRCUIT DIAGNOSIS >

OUTSIDE KEY ANTENNA

OUTSIDE KEY ANTENNA

Description

INFOID:0000000005239589

Detects whether Intelligent Key is outside the vehicle.
Integrated in front outside handle (driver side, passenger side) and installed in back door.

Component Function Check

INFOID:0000000005239590

1.

CHECK DOOR REQUEST SWITCH

Check door request switch. Refer to

DLK-88, "Component Function Check"

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Check door request switch. Refer to

DLK-88, "Diagnosis Procedure"

.

2.

CHECK FUNCTION

Be sure that Intelligent Key is in each outside key antenna detection area.

Does door lock/unlock when each request switch is pressed?

YES

>> Outside key antenna is OK.

NO

>> Refer to

DLK-94, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005239591

1.

CHECK OUTSIDE KEY ANTENNA INPUT SIGNAL 1

1.

Turn ignition switch OFF.

2.

Check signal between BCM harness connector and ground using an oscilloscope.

Is the inspection result normal?

YES

>> Replace BCM. Refer to

BCS-83, "Removal and Installation"

NO

>> GO TO 2.

2.

CHECK OUTSIDE KEY ANTENNA CIRCUIT

1.

Disconnect BCM connector and malfunctioning front outside key antenna connector or outside key
antenna (rear bumper) connector.

2.

Check continuity between BCM harness connector and malfunctioning outside key antenna harness con-
nector.

(+)

(–)

Condition

Signal

(Reference value)

BCM

Connector

Terminal

M122

Driver side

76, 77

Ground

Request switch

is pushed

When Intelligent Key
is in the antenna de-
tection area.

Passenger

side

74, 75

M121

Back door

38, 39

When Intelligent Key
is not in the antenna
detection area.

JMKIA0062GB

JMKIA0063GB