Nissan Frontier D40. Manual - part 55

BCS-30

< COMPONENT DIAGNOSIS >

POWER SUPPLY AND GROUND CIRCUIT

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

LIIA0915E

BCS

COMBINATION SWITCH INPUT CIRCUIT

BCS-31

< COMPONENT DIAGNOSIS >

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

COMBINATION SWITCH INPUT CIRCUIT

Diagnosis Procedure

INFOID:0000000005275698

Regarding Wiring Diagram information, refer to 

BCS-46, "Wiring Diagram"

.

1.

 CHECK INPUT 1 - 5 SYSTEM CIRCUIT FOR OPEN

1.

Turn ignition switch OFF.

2.

Disconnect BCM and combination switch.

3.

Check continuity between BCM harness connector and combi-
nation switch harness connector.

Does continuity exist?

YES

>> GO TO 2

NO

>> Repair or replace harness.

2.

 CHECK INPUT 1 - 5 SYSTEM CIRCUIT FOR SHORT

Check for continuity between BCM harness connector and ground.

Does continuity exist?

YES

>> Repair or replace harness.

NO

>> GO TO 3

3.

 CHECK BCM OUTPUT VOLTAGE

1.

Connect BCM.

2.

Turn ignition switch ON.

3.

Check voltage between BCM harness connector and ground.

System

BCM

Combination switch

Continuity

Connector

Terminal

Connector

Terminal

INPUT 1

M18

(A)

6

M28

(B)

6

Yes

INPUT 2

5

7

INPUT 3

4

10

INPUT 4

3

9

INPUT 5

2

8

ALMIA0275ZZ

System

BCM

Ground

Continuity

Connector

Terminal

INPUT 1

M18

6

No

INPUT 2

5

INPUT 3

4

INPUT 4

3

INPUT 5

2

ALMIA0276ZZ

ALMIA0277ZZ

BCS-32

< COMPONENT DIAGNOSIS >

COMBINATION SWITCH INPUT CIRCUIT

Is the measurement value normal?

YES

>> GO TO 4

NO

>> Replace BCM. Refer to 

BCS-54, "Removal and Installation"

.

4.

 CHECK COMBINATION SWITCH

Check combination switch. Refer to 

BCS-35, "Description"

.

Is the check result normal?

YES

>> Replace BCM. Refer to 

BCS-54, "Removal and Installation"

.

NO

>> Replace the combination switch (applicable parts). Refer to 

EXL-148, "Removal and Installation"

.

Special Repair Requirement

INFOID:0000000005275699

1.

 SAVING VEHICLE SPECIFICATION

Perform “READ CONFIGURATION” with CONSULT-III to save or print current vehicle specification.

>> GO TO 2

2.

 REPLACE BCM

Replace BCM. Refer to 

BCS-54, "Removal and Installation"

.

>> GO TO 3

3.

 WRITING VEHICLE SPECIFICATION

Perform “WRITE CONFIGURATION - Config file” or “WRITE CONFIGURATION - Manual selection” with
CONSULT-III to write vehicle specification. Refer to 

BCS-4, "CONFIGURATION : Special Repair Require-

ment"

.

>> GO TO 4

4.

 INITIALIZE BCM (NATS)

Perform BCM initialization. Refer to 

BCS-3, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT :

Special Repair Requirement"

.

>> Work End.

System

Terminals

Voltage

(Approx.)

(+)

(

−

)

BCM

Ground

Connector

Terminal

INPUT 1

M18

6

Refer to 

BCS-

37, "Refer-

ence Value"

.

INPUT 2

5

INPUT 3

4

INPUT 4

3

INPUT 5

2

BCS

COMBINATION SWITCH OUTPUT CIRCUIT

BCS-33

< COMPONENT DIAGNOSIS >

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

COMBINATION SWITCH OUTPUT CIRCUIT

Diagnosis Procedure

INFOID:0000000005275700

Regarding Wiring Diagram information, refer to 

BCS-46, "Wiring Diagram"

.

1.

 CHECK OUTPUT 1 - 5 SYSTEM CIRCUIT FOR OPEN

1.

Turn ignition switch OFF.

2.

Disconnect BCM and combination switch.

3.

Check continuity between BCM harness connector and combi-
nation switch harness connector.

Does continuity exist?

YES

>> GO TO 2

NO

>> Repair or replace harness.

2.

 CHECK OUTPUT 1 - 5 SYSTEM CIRCUIT FOR SHORT

Check for continuity between BCM harness connector and ground.

Does continuity exist?

YES

>> Repair or replace harness.

NO

>> GO TO 3

3.

 CHECK COMBINATION SWITCH

Check combination switch. Refer to 

BCS-35, "Description"

.

Is the check result normal?

YES

>> Replace BCM. Refer to 

BCS-54, "Removal and Installation"

.

NO

>> Replace combination switch (applicable parts). Refer to 

EXL-148, "Removal and Installation"

.

Special Repair Requirement

INFOID:0000000005275701

1.

 SAVING VEHICLE SPECIFICATION

Perform “READ CONFIGURATION” with CONSULT-III to save or print current vehicle specification.

>> GO TO 2

System

BCM

Combination switch

Continuity

Connector

Terminal

Connector

Terminal

OUTPUT 1

M18

(A)

36

M28

(B)

1

Yes

OUTPUT 2

35

2

OUTPUT 3

34

3

OUTPUT 4

33

4

OUTPUT 5

32

5

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System

BCM

Ground

Continuity

Connector

Terminal

OUTPUT 1

M18

36

No

OUTPUT 2

35

OUTPUT 3

34

OUTPUT 4

33

OUTPUT 5

32

ALMIA0279ZZ