Infiniti QX56 (Z62). Manual — part 116

BCS-78

< DTC/CIRCUIT DIAGNOSIS >

COMBINATION SWITCH INPUT CIRCUIT

COMBINATION SWITCH INPUT CIRCUIT

Diagnosis Procedure

INFOID:0000000006274843

1.

CHECK INPUT 1 - 5 CIRCUIT FOR OPEN

1.

Turn ignition switch OFF.

2.

Disconnect BCM and combination switch connectors.

3.

Check continuity between BCM harness connector and combination switch harness connector.

Does continuity exist?

YES

>> GO TO 2.

NO

>> Repair harnesses or connectors.

2.

CHECK INPUT 1 - 5 CIRCUIT FOR SHORT

Check for continuity between BCM harness connector and ground.

Does continuity exist?

YES

>> Repair harnesses or connectors.

NO

>> GO TO 3.

3.

CHECK BCM INPUT SIGNAL

1.

Connect BCM and combination switch connectors.

2.

Turn ON any switch in the system that is malfunction.

3.

Check voltage between BCM harness connector and ground.

Is the measurement value normal?

Yes

>> Replace BCM. Refer to

BCS-81, "Removal and Installation"

.

System

BCM

Combination switch

Continuity

Connector

Terminal

Connector

Terminal

INPUT 1

M68

6

M27

12

Existed

INPUT 2

5

14

INPUT 3

4

5

INPUT 4

3

2

INPUT 5

2

8

System

BCM

Ground

Continuity

Connector

Terminal

INPUT 1

M68

6

Not existed

INPUT 2

5

INPUT 3

4

INPUT 4

3

INPUT 5

2

System

Terminals

Voltage

(Approx.)

(+)

(

−

)

BCM

Ground

Connector

Terminal

INPUT 1

M68

6

Refer to

BCS-

33, "Refer-

ence Value"

.

INPUT 2

5

INPUT 3

4

INPUT 4

3

INPUT 5

2

BCS

COMBINATION SWITCH INPUT CIRCUIT

BCS-79

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

No

>> Replace combination switch.

BCS-80

< SYMPTOM DIAGNOSIS >

COMBINATION SWITCH SYSTEM SYMPTOMS

SYMPTOM DIAGNOSIS

COMBINATION SWITCH SYSTEM SYMPTOMS

Symptom Table

INFOID:0000000006274844

1.

Perform “Data Monitor” of CONSULT-III to check for any malfunctioning item.

2.

Check the malfunction combinations.

Malfunction item:

×

3.

Identify the malfunctioning part from the agreed combination and repair or replace the part.

Data monitor item

Malfunc-

tion com-

bination

FR WI

PER HI

FR WIP

ER LOW

F

R

W

A

SH

ER

S

W

FR WI

PER INT

RR

WIPE

R

O

N

RR WIP

E

R INT

RR W

ASHER

SW

INT VOL

U

ME

TURN SIG

NAL R

TURN SIGNAL L

T

A

IL

LA

MP

SW

H

I BEAM SW

HEAD LAMP SW

1

HEAD LAMP SW

2

P

ASSI

N

G

SW

AU

T

O

LI

GH

T

S

W

FR F

O

G

SW

×

×

×

×

A

×

×

×

×

B

×

×

×

×

C

×

×

×

×

D

×

×

×

E

×

×

×

F

×

×

×

×

G

×

×

×

H

×

×

×

×

I

×

×

×

×

J

All Items

K

If only one item is detected or the item is not applicable to the combinations A to K

L

Malfunction

combination

Malfunctioning part

Repair or replace

A

Combination switch OUTPUT 1 circuit

Inspect the combination switch output circuit applicable to the malfunction-
ing part. Refer to

BCS-76, "Diagnosis Procedure"

.

B

Combination switch OUTPUT 2 circuit

C

Combination switch OUTPUT 3 circuit

D

Combination switch OUTPUT 4 circuit

E

Combination switch OUTPUT 5 circuit

F

Combination switch INPUT 1 circuit

Inspect the combination switch input circuit applicable to the malfunctioning
part. Refer to

BCS-78, "Diagnosis Procedure"

.

G

Combination switch INPUT 2 circuit

H

Combination switch INPUT 3 circuit

I

Combination switch INPUT 4 circuit

J

Combination switch INPUT 5 circuit

K

BCM

Replace BCM. Refer to

BCS-81, "Removal and Installation"

.

L

Combination switch

Replace combination switch.

BCS

BCM

BCS-81

< REMOVAL AND INSTALLATION >

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

REMOVAL AND INSTALLATION

BCM

Removal and Installation

INFOID:0000000006274845

CAUTION:

Before replacing BCM, perform “READ CONFIGURATION” to save or print current vehicle specifica-
tion. Refer to

BCS-67, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT (BCM) : Descrip-

tion"

.

REMOVAL

1.

Remove combination meter. Refer to

MWI-85, "Removal and Installation"

.

2.

Remove bolts.

3.

Remove BCM and disconnect the connectors.

INSTALLATION

Install in the reverse order of removal.

CAUTION:

• Be sure to perform “WRITE CONFIGURATION” when replacing BCM.
• Be sure to perform the system initialization (IVIS) when replacing BCM. Refer to

BCS-67, "ADDI-

TIONAL SERVICE WHEN REPLACING CONTROL UNIT (BCM) : Work Procedure"

.