Nissan Titan A60. Manual - part 847

SEC-26

< DTC/CIRCUIT DIAGNOSIS >

POWER SUPPLY AND GROUND CIRCUIT

POWER SUPPLY AND GROUND CIRCUIT

BCM
BCM : Diagnosis Procedure

INFOID:0000000006752633

Regarding Wiring Diagram information, refer to 

BCS-46, "Wiring Diagram"

.

1.

 CHECK FUSES AND FUSIBLE LINK

Check that the following fuses and fusible link are not blown.

Is the fuse blown?

YES

>> Replace the blown fuse or fusible link after repairing the affected circuit.

NO

>> GO TO 2

2.

 CHECK POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect BCM.

3. Check voltage between BCM harness connector and ground.

Is the measurement value normal?

YES

>> GO TO 3

NO

>> Repair or replace harness.

3.

 CHECK GROUND CIRCUIT

Terminal No.

Signal name

Fuses and fusible link No.

57

Battery power supply

22 (15A)

70

F (50A)

11

Ignition ACC or ON

4 (10A)

38

Ignition ON or START

59 (10A)

Connector

Terminals 

Power

source

Condition

Voltage (V) (Ap-

prox.)

(+)

(-)

M18

11

Ground

ACC 

power 

supply

Ignition 

switch 

ACC or 

ON

Battery voltage

38

Ground

Ignition 

power 

supply

Ignition 

switch ON 

or START

Battery voltage

M20

57

Ground

Battery 

power 

supply

Ignition 

switch 

OFF

Battery voltage

70

Ground

Battery 

power 

supply

Ignition 

switch 

OFF

Battery voltage

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POWER SUPPLY AND GROUND CIRCUIT

SEC-27

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

Check continuity between BCM harness connector and ground.

Does continuity exist?

YES

>> Inspection End.

NO

>> Repair or replace harness.

BCM

Ground

Continuity

Connector

Terminal

M20

67

Yes

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SEC-28

< DTC/CIRCUIT DIAGNOSIS >

KEY CYLINDER SWITCH

KEY CYLINDER SWITCH

KING CAB
KING CAB : Description

INFOID:0000000006161588

The main power window and door lock/unlock switch detects condition of the door key cylinder switch and

transmits to BCM as the LOCK or UNLOCK signal. 

KING CAB : Component Function Check

INFOID:0000000006161589

1.

CHECK DOOR KEY CYLINDER SWITCH INPUT SIGNAL

Check "KEY CYL LK-SW" AND "KEY CYL UN-SW" in DATA MONITOR mode for “POWER DOOR LOCK

SYSTEM” with CONSULT-III.

Is the inspection result normal?

YES

>> Key cylinder switch is OK.

NO

>> Refer to 

SEC-28, "KING CAB : Diagnosis Procedure"

.

KING CAB : Diagnosis Procedure

INFOID:0000000006161590

Regarding Wiring Diagram information, refer to 

SEC-54, "Wiring Diagram"

.

1.

CHECK DOOR KEY CYLINDER SWITCH LH

With CONSULT-III

Check front door lock assembly LH (key cylinder switch) ("KEY CYL LK-SW") and ("KEY CYL UN-SW) in

DATA MONITOR mode with CONSULT–III. Refer to 

BCS-16, "DOOR LOCK : CONSULT-III Function (BCM -

DOOR LOCK)"

.

• When key inserted in front key cylinder is turned to LOCK:

• When key inserted in front key cylinder is turned to UNLOCK:

Without CONSULT-III

Check voltage between main power window and door lock/unlock switch connector D15 terminals 6, 7 and

ground.

Monitor item

Condition

KEY CYL LK-SW

Lock

: ON

Neutral / Unlock

: OFF

KEY CYL UN-SW

Unlock

: ON

Neutral / Lock

: OFF

KEY CYL LK-SW

: ON

KEY CYL UN-SW

: ON

KEY CYLINDER SWITCH

SEC-29

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

Is the inspection result normal?

YES

>> Front door lock assembly LH (key cylinder switch) signal is OK.

NO

>> GO TO 2

2.

CHECK DOOR KEY CYLINDER SWITCH LH GROUND HARNESS

1. Turn ignition switch OFF.

2. Disconnect front door lock assembly LH (key cylinder switch).

3. Check continuity between front door lock assembly LH (key cyl-

inder switch) connector (A) D14 terminal 5 and body ground.

Is the inspection result normal?

YES

>> GO TO 3

NO

>> Repair or replace harness.

3.

CHECK DOOR KEY CYLINDER SWITCH LH

Check continuity between front door lock assembly LH (key cylinder

switch) terminals.

Is the inspection result normal?

YES

>> GO TO 4

NO

>> Replace front door lock assembly LH (key cylinder switch). Refer to 

DLK-127, "Removal and

Installation"

.

4.

CHECK DOOR KEY CYLINDER HARNESS

1. Disconnect main power window and door lock/unlock switch.

Connector

Terminals

Condition

Voltage (V)

(Approx.)

(+)

(–)

D15

6

Ground

Neutral/Unlock

5

Lock

0

7

Neutral/Lock

5

Unlock

0

LIIA1256E

Connector

Terminals

Continuity

D14

5 – Ground

Yes

WIIA0755E

Terminals

Condition

Continuity

1 – 5 

Key is turned to UNLOCK or neutral.

No

Key is turned to LOCK.

Yes

5 – 6

Key is turned to LOCK or neutral.

No

Key is turned to UNLOCK.

Yes

LIIA1573E