Nissan Frontier D22. Manual - part 146

POWER DOOR LOCK SYSTEM

BL-21

C

D

E

F

G

H

J

K

L

M

A

B

BL

2. 

CHECK FRONT DOOR SWITCH

1.

Disconnect door switch harness connector.

2.

Check continuity between door switch terminals.

OK or NG

OK

>> Check the following

●

Front door switch LH ground circuit or front door switch RH ground condition

●

Harness for open or short between smart entrance control unit and door switch

NG

>> Replace door switch.

KEY SWITCH (INSERTED) CHECK

1. 

CHECK KEY SWITCH INPUT SIGNAL

1.

Check voltage between smart entrance control unit harness connector M111 terminal 25 (W/G) and
ground.

2.

Refer to 

BL-16, "Wiring Diagram — D/LOCK —"

 .

OK or NG

OK

>> Key switch is OK.

NG

>> GO TO 2.

Terminals

Condition

Continuity

Front door switch 

LH

2 - 3

Closed

No

Open

Yes

Front door switch 
RH and rear door 

switches

(+) - Ground

Closed

No

Open

Yes

AEL577C

LEL010A

BL-22

POWER DOOR LOCK SYSTEM

2. 

CHECK KEY SWITCH POWER SUPPLY

1.

Disconnect key switch harness connector.

2.

Check voltage between key switch harness connector terminal 1
and ground.

Battery voltage should exist.
Refer to 

BL-16, "Wiring Diagram — D/LOCK —"

 .

OK or NG

OK

>> GO TO 3.

NG

>> Check the following

●

7.5A fuse [No. 28, located in the fuse block (J/B)]

●

Harness for open or short between key switch and
fuse

3. 

CHECK KEY SWITCH

Check continuity between key switch terminals 1 and 2.

OK or NG

OK

>> Check harness for open or short between smart

entrance control unit and key switch.

NG

>> Replace key switch.

AEL415B

Continuity

Condition of key switch

: Key is inserted.

Yes

Condition of key switch

: Key is removed.

No

AEL416B

POWER DOOR LOCK SYSTEM

BL-23

C

D

E

F

G

H

J

K

L

M

A

B

BL

DOOR LOCK/UNLOCK SWITCH CHECK

1. 

CHECK DOOR LOCK/UNLOCK SWITCH INPUT SIGNAL

1.

Disconnect smart entrance control unit harness connector.

2.

Check continuity between smart entrance control unit harness
connector M110 terminal 4 (BR) or 5 (LG/R) and ground.
Refer to 

BL-16, "Wiring Diagram — D/LOCK —"

 .

OK or NG

OK

>> Door lock/unlock switch is OK.

NG

>> GO TO 2.

2. 

CHECK DOOR LOCK/UNLOCK SWITCH

1.

Disconnect door lock/unlock switch harness connector.

2.

Check continuity between door lock/unlock switch terminals.

OK or NG

OK

>> Check the following.

●

Ground circuit for door lock/unlock switch

●

Harness for open or short between door lock/unlock switch and smart entrance control unit

NG

>> Replace door lock/unlock switch.

Terminals

Door lock/unlock switch 

(LH or RH) condition

Continuity

(+)

(-)

4

Body ground

N and Locked

No

Unlocked

Yes

5

Body ground

N and Unlocked

No

Locked

Yes

WIIA0116E

WEL865A

AEL556C

BL-24

POWER DOOR LOCK SYSTEM

DOOR KEY CYLINDER SWITCH CHECK

1. 

CHECK DOOR KEY CYLINDER SWITCH INPUT SIGNAL (LOCK/UNLOCK SIGNAL)

Check voltage between smart entrance control unit harness connector M110 terminal 10 (Y/R) or 11 (Y) and
ground.

Refer to 

BL-16, "Wiring Diagram — D/LOCK —"

 .

OK or NG

OK

>> Door key cylinder switch is OK.

NG

>> GO TO 2.

2. 

CHECK DOOR KEY CYLINDER SWITCH

1.

Disconnect door key cylinder switch harness connector.

2.

Check continuity between door key cylinder switch terminals.

OK or NG

OK

>> Check the following

●

Door key cylinder switch ground circuit

●

Harness for open or short between smart entrance control unit and door key cylinder switch

NG

>> Replace door key cylinder switch.

WEL518A

LEL032A