Nissan Frontier D40. Manual - part 781

DIAGNOSIS SYSTEM (BCM)

INL-79

< FUNCTION DIAGNOSIS >

[WITHOUT POWER DOOR LOCKS]

C

D

E

F

G

H

I

J

K

M

A

B

INL

N

O

P

ACTIVE TEST

KEY CYL UN-SW [ON/OFF]

Lock switch status input from door lock and unlock switch

CDL LOCK SW [ON/OFF]

Lock switch status input from door lock and unlock switch

CDL UNLOCK SW [ON/OFF]

Unlock switch status input from door lock and unlock switch

KEYLESS LOCK [ON/OFF]

Lock signal status received from remote keyless entry receiver (integrated in the 
BCM)

KEYLESS UNLOCK [ON/OFF]

Unlock signal status received from remote keyless entry receiver (integrated in the 
BCM)

Monitor Item

[Unit]

Description

Test Item

Operation

Description

IGN ILLUM

ON

Outputs the ignition keyhole illumination control signal to turn the ignition keyhole il-
lumination lamp ON.

OFF

Stops the ignition keyhole illumination control signal to turn the ignition keyhole illu-
mination lamp OFF.

INT LAMP

ON

Outputs the interior room lamp control signal to turn the interior room lamps ON.

OFF

Stops the interior room lamp control signal to turn the interior room lamps OFF.

INL-80

< COMPONENT DIAGNOSIS >

[WITHOUT POWER DOOR LOCKS]

INTERIOR ROOM LAMP

COMPONENT DIAGNOSIS

INTERIOR ROOM LAMP

Diagnosis Procedure

INFOID:0000000005272848

Regarding Wiring Diagram information, refer to 

INL-85, "Wiring Diagram"

.

CAUTION:

 Before performing the diagnosis, check that the following is normal.
• Fuse
• Interior room lamp bulbs

1.

CHECK INTERIOR ROOM LAMP POWER SUPPLY

Check voltage between interior room lamp connectors and ground.

Is the inspection result normal?

YES

>> GO TO 2

NO

>> Repair the harness or connectors.

2.

CHECK INTERIOR ROOM LAMP GROUND

1.

Disconnect interior room lamp connectors.

2.

Check continuity between interior room lamp connectors and
ground while operating the door switches.

Is the inspection result normal?

YES

>> Replace the interior room lamp. Refer to 

INL-64, "Removal and Installation"

.

NO

>> GO TO 3

3.

CHECK DOOR SWITCHES

Check the door switches. Refer to 

INL-81, "Component Inspection (Door Switch)"

.

Is the inspection result normal?

YES

>> • Crew cab models, repair the harness or connectors between the interior room lamp and the

door switches.

• King cab models, GO TO 4

NO

>> Replace the door switch.

4.

CHECK DOOR SWITCH GROUND (KING CAB)

Component

(+)

(-)

Voltage

Connector

Terminal

Front room/map lamp 
(if equipped) 

R9 (A)

1

Ground

Battery voltage

Room lamp 2nd row 

R10 (B)

2

AWLIA0824ZZ

Component

(+)

(-)

Door 

switches

Continuity

Connector

Terminal

Front room/map lamp 
(if equipped) 

R9 (A)

2

Ground

Open

Yes

Closed

No

Room lamp 2nd row 

R10 (B)

1

Open

Yes

Closed

No

AWLIA0825ZZ

INTERIOR ROOM LAMP

INL-81

< COMPONENT DIAGNOSIS >

[WITHOUT POWER DOOR LOCKS]

C

D

E

F

G

H

I

J

K

M

A

B

INL

N

O

P

Check continuity between door switch connectors and ground.

Is the inspection result normal?

YES

>> Repair the harness or connectors between the interior

room lamp and the door switches.

NO

>> Repair the harness or connectors between the door

switch and ground.

Component Inspection (Door Switch)

INFOID:0000000005272849

CREW CAB

1.

CHECK DOOR SWITCHES

1.

Disconnect door switch.

2.

Check continuity between door switch terminals.

Is the inspection result normal?

YES

>> Inspection End

NO

>> Replace door switch.

KING CAB

1.

CHECK DOOR SWITCHES

1.

Disconnect door switch.

2.

Check continuity between door switch terminals.

Is the inspection result normal?

YES

>> Inspection End

NO

>> Replace door switch.

Component

(+)

(-)

Continuity

Connector

Terminal

Front door switch LH 

D213

3

Ground

Yes

Front door switch RH 

D314

3

AWLIA0866ZZ

Terminal

Condition

Continuity

Door switch

1 – Ground

Open

Yes

Closed

No

AWLIA0864ZZ

Item

Terminal

Condition

Continuity

Door switches 

1 – 3 

Open

Yes

Closed

No

AWLIA0865ZZ

INL-82

< COMPONENT DIAGNOSIS >

[WITHOUT POWER DOOR LOCKS]

CARGO LAMP CONTROL CIRCUIT

CARGO LAMP CONTROL CIRCUIT

Description

INFOID:0000000005272850

Controls the cargo lamp relay coil (ground side) to turn the cargo lamp ON and OFF.

Diagnosis Procedure

INFOID:0000000005272851

Regarding Wiring Diagram information, refer to 

INL-85, "Wiring Diagram"

.

CAUTION:

 Before performing the diagnosis, check that the following is normal.
• Fuse
• Cargo lamp bulb

1.

CHECK CARGO LAMP OPERATION

Check the cargo lamp operation from the cargo lamp switch and the door switches.

Is the cargo lamp inoperative from all of the above switches?

YES

>> GO TO 4

NO

>> • Inoperative from cargo lamp switch only, GO TO 2

• Inoperative from door switches only, refer to 

DLK-27, "KING CAB : Description"

 (king cab), 

DLK-

29, "CREW CAB : Description"

 (crew cab).

2.

CHECK CARGO LAMP SWITCH

Check the cargo lamp switch. Refer to 

INL-84, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 3

NO

>> Replace the cargo lamp switch.

3.

CHECK CARGO LAMP SWITCH CIRCUIT

1.

Disconnect BCM connector M18 and cargo lamp switch connec-
tor.

2.

Check continuity between BCM connector M18 (A) terminal 31
and cargo lamp switch connector M71 (B) terminal 1.

3.

Check continuity between BCM connector M18 terminal 31 and ground.

Is the inspection result normal?

YES

>> Replace BCM. Refer to 

BCS-54, "Removal and Installation"

.

NO

>> Repair harness or connectors.

4.

CHECK CARGO LAMP RELAY

Check the cargo lamp relay. Refer to 

INL-84, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 5

BCM

Cargo lamp switch

Continuity

Connector

Terminal

Connector

Terminal

M18 (A)

31

M71 (B)

1

Yes

AWLIA0807ZZ

Connector

Terminal

—

Continuity

M18 (A)

31

Ground

No