Nissan Murano Z51. Manual - part 1046

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< DTC/CIRCUIT DIAGNOSIS >

B2268 WATER TEMP

B2268 WATER TEMP

Description

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

DTC Logic

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DTC DETECTION LOGIC

Diagnosis Procedure

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1.

PERFORM SELF-DIAGNOSIS OF ECM

Perform “Self Diagnosis Result” of ECM, and repair or replace malfunctioning parts.

>> Refer to 

EC-116, "CONSULT-III Function"

.

DTC

Display contents of 

CONSULT-III

Diagnostic item is detected when ...

Probable malfunction location

B2268

WATER TEMP

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

• Engine coolant temperature sensor
• ECM

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POWER SUPPLY AND GROUND CIRCUIT

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< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

K

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B

A

O

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POWER SUPPLY AND GROUND CIRCUIT

COMBINATION METER

COMBINATION METER : Diagnosis Procedure

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1.

CHECK FUSE

Check for blown fuses.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Be sure to eliminate cause of malfunction before installing new fuse.

2.

CHECK POWER SUPPLY CIRCUIT

Check voltage between combination meter harness connector terminals and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Check harness between combination meter and fuse.

3.

CHECK GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect combination meter connector.

3.

Check continuity between combination meter harness connector terminals and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair harness or connector.

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM) : Di-
agnosis Procedure

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1.

CHECK FUSES AND FUSIBLE LINK

Check that the following IPDM E/R fuses or fusible links are not blown.

Power source

Fuse No.

Battery

11

Ignition switch ON or START 

4

Terminals

Ignition switch po-

sition

Voltage

(Approx.)

(+)

(-)

Combination meter

Ground

Connector

Terminal

M34

1

OFF

Battery voltage

2

ON

Terminals

Continuity

(+)

(-)

Combination meter

Ground

Connector

Terminal

M34

3

Existed

23

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POWER SUPPLY AND GROUND CIRCUIT

Is the fuse fusing?

YES

>> Replace the blown fuse or fusible link after repairing the affected circuit if a fuse or fusible link is

blown.

NO

>> GO TO 2.

2.

CHECK POWER SUPPLY CIRCUIT

1.

Turn the ignition switch OFF.

2.

Disconnect IPDM E/R connector.

3.

Check voltage between IPDM E/R harness connector and the ground.

Is the measurement value normal?

YES

>> GO TO 3.

NO

>> Repair the harness or connector.

3.

CHECK GROUND CIRCUIT

Check continuity between IPDM E/R harness connectors and the ground.

Does continuity exist?

YES

>> INSPECTION END

NO

>> Repair the harness or connector.

Signal name

Fuses and fusible link No.

Battery power supply

E

50

51

Terminals

Voltage

(Approx.)

(+)

(

−

)

IPDM E/R

Connector

Terminal

Ground

E9

1

Battery voltage

IPDM E/R

Ground

Continuity

Connector

Terminal

E10

12

Existed

E11

41

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FUEL LEVEL SENSOR SIGNAL CIRCUIT

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< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

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FUEL LEVEL SENSOR SIGNAL CIRCUIT

Description

INFOID:0000000005524875

The fuel level sensor unit and fuel pump (main) and the fuel level sensor unit (sub) detect the fuel level in the
fuel tank and transmit the fuel gauge signal to the combination meter.

Component Function Check

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1.

CHECK COMBINATION METER OUTPUT SIGNAL

Select the “Data Monitor” for the “METER/M&A” and compare the “FUEL METER” monitor value with the fuel
gauge reading on the combination meter.

Does monitor value match fuel gauge reading?

YES

>> INSPECTION END

NO

>> Replace combination meter.

Diagnosis Procedure

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1.

CHECK COMBINATION METER INPUT SIGNAL

1.

Turn ignition switch ON.

2.

Check voltage between combination meter harness connector terminal and ground.

Does it match fuel gauge reading?

YES

>> GO TO 2.

NO

>> Replace the combination meter.

2.

CHECK FUEL LEVEL SENSOR CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect combination meter connector and fuel level sensor unit (main) connector.

3.

Check continuity between combination meter harness connector terminal and fuel level sensor unit (main)
harness connector terminal.

Fuel gauge pointer

Reference value of data monitor [lit.]

Full

Approx. 77.8

Three quarters

Approx. 63.0

Half

Approx. 42.5

A quarter

Approx. 22.0

Empty

Approx. 7.1

Terminals

Voltage

(Approx.)

(+)

(-)

Combination meter

Ground

Terminal

Connector

M34

34

JPNIA0740ZZ