Nissan Note E12. Manual - part 463

MWI-38

< DTC/CIRCUIT DIAGNOSIS >

B2268 WATER TEMP

B2268 WATER TEMP

Description

INFOID:0000000009549382

The engine coolant temperature signal is transmitted from ECM to the combination meter via CAN communi-

cation.

DTC Logic

INFOID:0000000009549383

DTC DETECTION LOGIC

Diagnosis Procedure

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1.

PERFORM SELF-DIAGNOSIS OF ECM

Perform Self Diagnostic Result of ECM, and repair or replace malfunctioning parts.

>> Refer to 

EC-53, "CONSULT Function"

.

DTC

Display Item

Malfunction detected condition

Possible malfunction

B2268

WATER TEMP METER
[B2268]

ECM continuously transmits abnormal engine coolant 
temperature signals for 60 seconds or more 

• Engine coolant temperature sensor
• ECM

MWI

POWER SUPPLY AND GROUND CIRCUIT

MWI-39

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

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J

K

L

M

B

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POWER SUPPLY AND GROUND CIRCUIT

COMBINATION METER
COMBINATION METER : Diagnosis Procedure

INFOID:0000000009549348

Regarding Wiring Diagram information, refer to 

MWI-22, "Wiring Diagram"

.

1.

CHECK FUSE

Check that the following fuses are not blown.

Is the fuse blown?

YES

>> GO TO 2.

NO

>> Replace the blown fuse after repairing the affected circuit.

2.

POWER SUPPLY CIRCUIT CHECK

1. Disconnect combination meter connector.

2. Check voltage between combination meter harness connector M24,  terminals 27, 28, 15 and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness or connector.

3.

GROUND  CIRCUIT CHECK

1. Turn ignition switch OFF.

2. Disconnect combination meter connector.

3. Check continuity between combination meter harness connector M24, terminals 21, 22, 23 and ground.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Repair or replace harness or connector.

BODY CONTROL SYSTEM

Power source

Fuse No.

Battery

8

Ignition switch ON or START 

3

Ignition switch ACC or ON 

18

Terminals

Ignition switch position

(+)

(–)

OFF

ACC

ON

START

Connector

Terminal

M24

27

Ground

Battery voltage

Battery voltage

Battery

 voltage

Battery voltage

28

0V

0V

Battery
voltage

Battery voltage

15

0V

Battery voltage

Battery 
voltage

0V

Terminals

Continuity

(+)

(–)

Connector

Terminal

M24

21

Ground

Yes

22

23

MWI-40

< DTC/CIRCUIT DIAGNOSIS >

POWER SUPPLY AND GROUND CIRCUIT

BODY CONTROL SYSTEM : Diagnosis Procedure

INFOID:0000000009643044

Regarding Wiring Diagram information, refer to 

BCS-48, "Wiring Diagram"

.

1.

CHECK FUSES AND FUSIBLE LINK

Check that the following fuses and fusible link are not blown.

Is the fuse blown?

YES

>> Replace the blown fuse or fusible link after repairing the affected circuit.

NO

>> GO TO 2.

2.

CHECK POWER SUPPLY CIRCUIT

1. Disconnect BCM connector M99.

2. Check voltage between BCM connector M99 and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK GROUND CIRCUIT

Check continuity between BCM connector M99 and ground.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Repair harness or connector.

Terminal No.

Signal name

Fuses and fusible link No.

57

Battery power supply

12 (10A)

70

G (40A)

BCM

Ground

Voltage

Connector

Terminal

M99

57

—

Battery voltage

70

BCM

Ground

Continuity

Connector

Terminal

M99

67

—

Yes

MWI

FUEL LEVEL SENSOR SIGNAL CIRCUIT

MWI-41

< DTC/CIRCUIT DIAGNOSIS >

C

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FUEL LEVEL SENSOR SIGNAL CIRCUIT

Description

INFOID:0000000009549351

The fuel level sensor unit and fuel pump detects the approximate fuel level in the fuel tank and transmits the

fuel level signal to the combination meter.

Component Function Check

INFOID:0000000009549352

1.

COMBINATION METER INPUT SIGNAL

1. Select METER/M&A on CONSULT.

2. Using FUEL METER of DATA MONITOR, compare the DATA MONITOR value with the fuel gauge posi-

tion.

Does monitor value match fuel gauge reading?

YES

>> Inspection End.

NO

>> Replace combination meter. Refer to 

MWI-48, "Removal and Installation"

.

Diagnosis Procedure

INFOID:0000000009549353

Regarding Wiring Diagram information, refer to 

MWI-22, "Wiring Diagram"

.

1.

CHECK HARNESS CONNECTOR

1. Turn ignition switch OFF.

2. Check combination meter and fuel level sensor unit terminals (meter-side and harness-side) for poor con-

nection.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace terminals or connectors.

2.

CHECK FUEL LEVEL SENSOR UNIT CIRCUIT

1. Disconnect combination meter harness connector M24 and fuel level sensor unit and fuel pump harness

connector B44.

2. Check continuity between combination meter harness connector M24 terminal 6 and fuel level sensor unit

and fuel pump harness connector B44 terminal 2.

3. Check continuity between fuel level sensor unit and fuel pump harness connector B44 terminal 2 and

ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

Fuel gauge indication position

Reference value of data monitor [L]

1

Approx.  39.7

3/4

Approx. 32.9

1/2

Approx. 22.7

1/4

Approx. 11.9

0

Approx.  2.7

Connector

Terminal

Connector

Terminal

Continuity

M24

6

B44

2

Yes

Connector

Terminal

Ground

Continuity

B44

2

No