Nissan Titan A60. Manual - part 986

WCS

SEAT BELT BUCKLE SWITCH SIGNAL CIRCUIT

WCS-19

< DTC/CIRCUIT DIAGNOSIS >

C

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F

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B

A

O

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YES

>> Inspection End.

NO

>> Repair harness or connector.

Component Inspection

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1.

CHECK SEAT BELT BUCKLE SWITCH

1. Turn ignition switch OFF.

2. Disconnect the seat belt buckle switch LH connector.

3. Check continuity between the seat belt buckle switch LH terminals 1 and 2.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Replace the seat belt buckle switch LH.

1– 2
When seat belt is 
fastened

: Continuity should not exist.

When seat belt is 
unfastened

: Continuity should exist.

WCS-20

< DTC/CIRCUIT DIAGNOSIS >

KEY SWITCH SIGNAL CIRCUIT

KEY SWITCH SIGNAL CIRCUIT

Description

INFOID:0000000006166411

Transmits a key switch signal to the BCM.

Component Function Check

INFOID:0000000006166412

1.

CHECK BCM INPUT SIGNAL

Select “DATA MONITOR” for “BCM” and check the “KEY ON SW” monitor value.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> • For vehicles with column shift, refer to 

WCS-20, "Diagnosis Procedure - Column Shift"

.

• For vehicles with floor shift, refer to 

WCS-21, "Diagnosis Procedure - Floor Shift"

.

Diagnosis Procedure - Column Shift

INFOID:0000000006713809

Regarding Wiring Diagram information, refer to 

WCS-38, "Wiring Diagram"

.

COLUMN SHIFT

1.

CHECK FUSE

Check if the key switch 10A fuse [No. 3, located in the fuse block (J/B)] is blown.
Is the fuse blown?

YES

>> Be sure to repair the cause of malfunction before installing new fuse.

NO

>> GO TO 2

2.

CHECK BCM INPUT SIGNAL

Check voltage between BCM harness connector M18 terminal 37

and ground.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> GO TO 3

3.

CHECK KEY SWITCH CIRCUIT 

KEY ON SW
When key is inserted into key cylinder

: ON

When key is removed from key cylinder : OFF

Terminals

Condition

Voltage

(Approx.)

(+)

(

−)

BCM

connector

Terminal

M18

37

Ground

Key is inserted

Battery voltage

Key is removed

0

PKIC0721E

WCS

KEY SWITCH SIGNAL CIRCUIT

WCS-21

< DTC/CIRCUIT DIAGNOSIS >

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1. Disconnect BCM connector M18 and key switch connector.

2. Check continuity between BCM harness connector M18 (A) ter-

minal 37 and key switch harness connector M80 (B) terminal 4.

3. Check continuity between BCM harness connector M18 (A) ter-

minal 37 and ground.

Is the inspection result normal?

YES

>> GO TO 4

NO

>> Repair harness or connector.

4.

CHECK KEY SWITCH POWER SUPPLY CIRCUIT

Check voltage between key switch harness connector M80 terminal

3 and ground.

Is the inspection result normal?

YES

>> Replace key switch.

NO

>> Repair harness or connector.

Diagnosis Procedure - Floor Shift

INFOID:0000000006166413

Regarding Wiring Diagram information, refer to 

WCS-38, "Wiring Diagram"

.

FLOOR SHIFT

1.

CHECK FUSE

Check if the key switch and key lock solenoid 10A fuse [No. 3, located in the fuse block (J/B)] is blown.
Is the fuse blown?

YES

>> Be sure to repair the cause of malfunction before installing new fuse.

NO

>> GO TO 2

2.

CHECK BCM INPUT SIGNAL

BCM

Key switch

Continuity

Connector

Terminal

Connector

Terminal

M18 (A)

37

M80 (B)

4

Yes

BCM

Ground

Continuity

Connector

Terminal

M18 (A)

37

No

AWNIA0178ZZ

Terminals

Voltage

(Approx.)

(+)

(

−)

Key switch 

Terminal

M80

3

Ground

Battery voltage

AWNIA0179ZZ

WCS-22

< DTC/CIRCUIT DIAGNOSIS >

KEY SWITCH SIGNAL CIRCUIT

Check voltage between BCM harness connector M18 terminal 37

and ground.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> GO TO 3

3.

CHECK KEY SWITCH CIRCUIT 

1. Disconnect BCM connector M18 and key switch and key lock solenoid connector.

2. Check continuity between BCM harness connector M18 terminal 37 and key switch and key lock solenoid

harness connector M27 terminal 4.

3. Check continuity between BCM harness connector M18 terminal 37 and ground.

Is the inspection result normal?

YES

>> GO TO 4

NO

>> Repair harness or connector.

4.

CHECK KEY SWITCH POWER SUPPLY CIRCUIT

Check voltage between key switch and key lock solenoid harness connector M27 terminal 3 and ground.

Is the inspection result normal?

YES

>> Replace key switch and key lock solenoid.

NO

>> Repair harness or connector.

Component Inspection - Column Shift

INFOID:0000000006713810

COLUMN SHIFT

1.

CHECK KEY SWITCH

Terminals

Condition

Voltage

(Approx.)

(+)

(

−)

BCM

connector

Terminal

M18

37

Ground

Key is inserted

Battery voltage

Key is removed

0

PKIC0721E

BCM

Key switch and 

key lock solenoid

Continuity

Connector

Terminal

Connector

Terminal

M18

37

M27

4

Yes

BCM

Ground

Continuity

Connector

Terminal

M18

37

No

Terminals

Voltage

(Approx.)

(+)

(

−)

Key switch and key lock 

solenoid 

Terminal

M27

3

Ground

Battery voltage