Nissan Leaf. Manual - part 971

MWI

COMMUNICATION SIGNAL (METER

→UPPER) CIRCUIT

MWI-87

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

COMMUNICATION SIGNAL (METER

→UPPER) CIRCUIT

Description

INFOID:0000000010122423

The communication line (METER 

→ UPPER) is used to communicate signals between the combination meter

and the upper meter in order to control the upper meter.

Diagnosis Procedure

INFOID:0000000010122424

Regarding Wiring Diagram information, refer to 

MWI-68, "Wiring Diagram"

.

1.

CHECK CONNECTOR

Check combination meter, upper meter and terminals (combination meter side, upper meter side, and harness

side) for looseness or bent.
Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace harness or connector.

2.

CHECK COMMUNICATION LINE (METER 

→ UPPER) SIGNAL CIRCUIT

1. Power switch OFF.

2. Disconnect combination meter and upper meter connector.

3. Check continuity between combination meter harness connector and upper harness connector.

4. Check continuity between combination meter harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness or connector.

3.

CHECK COMMUNICATION LINE (METER 

→ UPPER) OUTPUT SIGNAL

1. Connect combination meter and upper meter connector.

2. Power switch ON.

3. Check voltage between combination meter and ground.

Combination meter

Upper meter

Continuity

Connector

Terminal

Connector

Terminal

M34

32

M62

8

Yes

33

4

Combination meter

Ground

Continuity

Connector

Terminal

M34

32

No

33

MWI-88

< DTC/CIRCUIT DIAGNOSIS >

COMMUNICATION SIGNAL (METER

→UPPER) CIRCUIT

Is the inspection result normal?

YES

>> Replace upper meter. Refer to 

MWI-103, "Removal and Installation"

.

NO

>> Replace combination meter. Refer to 

MWI-102, "Removal and Installation"

.

Terminal

Voltage

(Approx.)

(+)

(-)

Combination meter

Connector

Terminal

Ground

M34

32

NOTE:
Reference waveform

33

NOTE:
Reference waveform

JSNIA3767GB

JSNIA3768GB

MWI

METER CONTROL SWITCH SIGNAL CIRCUIT

MWI-89

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

METER CONTROL SWITCH SIGNAL CIRCUIT

Diagnosis Procedure

INFOID:0000000010122425

Regarding Wiring Diagram information, refer to 

MWI-68, "Wiring Diagram"

.

1.

CHECK COMBINATION METER INPUT SIGNAL

1. Power switch ON.

2. Check voltage between the following terminals of the combination meter.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> GO TO 2.

2.

CHECK METER CONTROL SWITCH SIGNAL CIRCUIT

1. Power switch OFF.

2. Disconnect combination meter connector and meter control switch connector.

3. Check continuity between combination meter harness connector and meter control switch harness con-

nector.

4. Check continuity between combination meter harness connector and ground.

Combination meter

Condition

Voltage

(Approx.)

Connector

Terminals

(+)

(

−)

M34

13

12

When 

 switch (enter switch) is pressed

0 V

Other than the above

5 V

14

When 

 switch (select switch) is pressed

0 V

Other than the above

5 V

15

When trip reset switch is pressed

0 V

Other than the above

5 V

16

When 

 switch (illumination control switch) is pressed

0 V

Other than the above

5 V

Terminals

Continuity

Combination meter

Meter control switch

Connector

Terminal

Connector

Terminal

M34

12

M26

5

Yes

13

1

14

12

15

11

16

6

MWI-90

< DTC/CIRCUIT DIAGNOSIS >

METER CONTROL SWITCH SIGNAL CIRCUIT

Is the inspection result normal? 

YES

>> Inspection End.

NO

>> Repair or replace harness or connector.

Component Inspection

INFOID:0000000010122426

1.

CHECK METER CONTROL SWITCH

1. Power switch OFF.

2. Disconnect meter control switch connector. 

3. Check meter control switch.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Replace meter control switch. Refer to 

MWI-104, "Removal and Installation"

.

Combination meter

Ground

Continuity

Connector

Terminal

M34

12

No

13

14

15

16

Terminals

Condition

Continuity

Meter control switch

1

5

When 

 switch (enter switch) is pressed

Yes

Other than the above

No

6

When 

 switch (illumination control switch) is pressed

Yes

Other than the above

No

11

When trip reset switch is pressed

Yes

Other than the above

No

12

When 

 switch (select switch) is pressed

Yes

Other than the above

No