Infiniti QX56 (JA60). Manual - part 104

BCS

COMBINATION SWITCH INPUT CIRCUIT

BCS-35

< COMPONENT DIAGNOSIS >

[BCM]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

COMBINATION SWITCH INPUT CIRCUIT

Diagnosis Procedure

INFOID:0000000005146422

Regarding Wiring Diagram information, refer to 

BCS-49, "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-36

< COMPONENT DIAGNOSIS >

[BCM]

COMBINATION SWITCH INPUT CIRCUIT

Is the measurement value normal?

YES

>> GO TO 4

NO

>> Replace BCM. Refer to 

BCS-59, "Removal and Installation"

.

4.

 CHECK COMBINATION SWITCH

Check combination switch. Refer to 

BCS-38, "Description"

.

Is the check result normal?

YES

>> Replace BCM. Refer to 

BCS-59, "Removal and Installation"

.

NO

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

EXL-154, "Removal and Installation"

.

Special Repair Requirement

INFOID:0000000005146423

1.

 ADDITIONAL SERVICE WHEN REPLACING BCM

>> Refer to 

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

Requirement"

.

System

Terminals

Voltage

(Approx.)

(+)

(

−)

BCM

Ground

Connector

Terminal

INPUT 1

M18

6

Refer to 

BCS-

40, "Refer-

ence Value"

.

INPUT 2

5

INPUT 3

4

INPUT 4

3

INPUT 5

2

BCS

COMBINATION SWITCH OUTPUT CIRCUIT

BCS-37

< COMPONENT DIAGNOSIS >

[BCM]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

COMBINATION SWITCH OUTPUT CIRCUIT

Diagnosis Procedure

INFOID:0000000005146424

Regarding Wiring Diagram information, refer to 

BCS-49, "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-38, "Description"

.

Is the check result normal?

YES

>> Replace BCM. Refer to 

BCS-59, "Removal and Installation"

.

NO

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

EXL-154, "Removal and Installation"

.

Special Repair Requirement

INFOID:0000000005146425

1.

 ADDITIONAL SERVICE WHEN REPLACING BCM

>> Refer to 

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

Requirement"

.

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

ALMIA0278ZZ

System

BCM

Ground

Continuity

Connector

Terminal

OUTPUT 1

M18

36

No

OUTPUT 2

35

OUTPUT 3

34

OUTPUT 4

33

OUTPUT 5

32

ALMIA0279ZZ

BCS-38

< COMPONENT DIAGNOSIS >

[BCM]

COMBINATION SWITCH

COMBINATION SWITCH

Description

INFOID:0000000005146426

COMBINATION SWITCH MATRIX

Combination switch consists of INPUT circuit and OUTPUT circuit.

Combination switch circuit

Combination switch INPUT-OUTPUT system list

NOTE:
Headlamp has a dual system switch.

Diagnosis Procedure

INFOID:0000000005146427

1.

 CHECK LIGHT & TURN SIGNAL SWITCH

Check operation with normal light and turn signal switch installed.
Does it operate normally?

YES

>> Replace light and turn signal switch. Refer to 

EXL-154, "Removal and Installation"

.

NO

>> GO TO 2

2.

 CHECK WIPER & WASHER SWITCH

Check operation with normal wiper and washer switch installed. 
Does it operate normally?

YES

>> Replace wiper and washer switch. Refer to 

WW-85, "Wiper and Washer Switch"

.

System

OUTPUT 1

OUTPUT 2

OUTPUT 3

OUTPUT 4

OUTPUT 5

INPUT 1

—

FR WASHER

FR WIPER LOW

TURN LH

TURN RH

INPUT 2

FR WIPER HI

—

FR WIPER INT

PASSING

HEADLAMP 1

INPUT 3

INT VOLUME 1

RR WASHER

—

HEADLAMP 2

HI BEAM

INPUT 4

RR WIPER INT

INT VOLUME 3

AUTO LIGHT

—

TAIL LAMP

INPUT 5

INT VOLUME 2

RR WIPER

—

FR FOG

—

LIIA0760E