Infiniti FX35, FX50 (S51). Manual - part 1385

MWI

POWER SUPPLY AND GROUND CIRCUIT

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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 unified meter and A/C amp. harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Check harness between unified meter and A/C amp. and fuse.

3.

CHECK GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect unified meter and A/C amp. connector.

3.

Check continuity between unified meter and A/C amp. harness connector 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

INFOID:0000000005619020

1.

CHECK FUSES AND FUSIBLE LINK

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

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 ground.

Terminals

Ignition switch position

Value (Approx.)

(+)

(-)

Unified meter A/C amp.

Terminal

Signal name

M67

54

Battery power supply

Ground

OFF

Battery voltage

41

ACC power supply

ACC

Battery voltage

53

Ignition signal

ON

Battery voltage

Unified meter A/C amp.

Ground

Continuity

Connector

Terminal

M67

55

Existed

71

Existed

Signal name

Fuses and fusible link No.

Battery power supply

D

50

51

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< DTC/CIRCUIT DIAGNOSIS >

POWER SUPPLY AND GROUND CIRCUIT

Is the measurement value normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK GROUND CIRCUIT

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

Does continuity exist?

YES

>> INSPECTION END

NO

>> Repair harness or connector.

Terminals

Voltage

(Approx.)

(+)

(

−

)

IPDM E/R

Connector

Terminal

Ground

E4

1

Battery voltage

IPDM E/R

Ground

Continuity

Connector

Terminal

E5

12

Existed

E6

41

MWI

FUEL LEVEL SENSOR SIGNAL CIRCUIT

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FUEL LEVEL SENSOR SIGNAL CIRCUIT

Description

INFOID:0000000005524624

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 unified meter and A/C amp.

Component Function Check

INFOID:0000000005524625

1.

CHECK UNIFIED METER AND A/C AMP. 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

INFOID:0000000005524626

1.

CHECK UNIFIED METER AND A/C AMP. INPUT SIGNAL

1.

Turn ignition switch ON.

2.

Check voltage between unified meter and A/C amp. harness connector and ground.

Does it match fuel gauge reading?

YES

>> GO TO 2.

NO

>> Replace the unified meter and A/C amp.

2.

CHECK FUEL LEVEL SENSOR (SUB) CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect unified meter and A/C amp. connector and fuel level sensor unit (sub) connector.

3.

Check continuity between unified meter and A/C amp. harness connector and fuel level sensor unit (sub)
harness connector.

Fuel gauge pointer

Reference value of data monitor [L]

Full

Approx. 85.3

Three quarters

Approx. 67.3

Half

Approx. 45.4

A quarter

Approx. 22.0

Empty

Approx. 8.7

Terminals

Voltage

(Approx.)

(+)

(-)

Unified meter and A/C amp.

Ground

Connector

Terminal

M67

42

SKIB8867E

Unified meter A/C amp.

Fuel level sensor unit (sub)

Continuity

Connector

Terminal

Connector

terminal

M67

42

B21

1

Existed

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< DTC/CIRCUIT DIAGNOSIS >

FUEL LEVEL SENSOR SIGNAL CIRCUIT

4.

Check continuity between unified meter and A/C amp. harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK FUEL LEVEL SENSOR (MAIN-SUB) CIRCUIT

1.

Disconnect fuel level sensor unit and fuel pump (main) connector.

2.

Check continuity between fuel level sensor unit (sub) harness connector and fuel level sensor unit and
fuel pump (main) harness connector.

3.

Check continuity between fuel level sensor unit (sub) harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair harness or connector.

4.

CHECK FUEL LEVEL SENSOR (MAIN) CIRCUIT

Check continuity between fuel level sensor unit and fuel pump (main) harness connector and unified meter
and A/C amp. harness connector.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair harness or connector.

5.

CHECK INSTALLATION CONDITION

Check fuel level sensor unit installation, and check whether the float arm interferes or binds with any of the
internal components in the fuel tank.
Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Install the fuel level sensor unit properly.

Component Inspection

INFOID:0000000005524627

1.

REMOVE FUEL LEVEL SENSOR UNIT

Remove the fuel level sensor unit. Refer to 

FL-5, "Removal and Installation"

. 

>> GO TO 2.

2.

CHECK FUEL LEVEL SENSOR UNIT AND FUEL PUMP (MAIN)

Unified meter A/C amp.

Ground

Continuity

Connector

Terminal

M67

42

Not existed

Fuel level sensor unit (sub)

Fuel level sensor unit and fuel pump (main)

Continuity

Connector

Terminal

Connector

terminal

B21

2

B22

2

Existed

Fuel level sensor unit (sub)

Ground

Continuity

Connector

Terminal

B21

2

Not existed

Fuel level sensor unit and fuel pump (main)

Unified meter A/C amp.

Continuity

Connector

Terminal

Connector

terminal

B22

5

M67

58

Existed