Infiniti QX56 (Z62). Manual - part 954

MWI-70

< DTC/CIRCUIT DIAGNOSIS >

FUEL LEVEL SENSOR SIGNAL CIRCUIT

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK FUEL LEVEL SENSOR GROUND CIRCUIT

Check continuity between fuel level sensor unit harness connector and combination meter harness connector.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair harness or connector.

Component Inspection

INFOID:0000000006221750

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

Check the resistance between fuel level sensor unit and fuel pump.

*: When float rod is contact with stopper.

Is inspection result OK?

YES

>> INSPECTION END

NO

>> Replace fuel level sensor unit and fuel pump. Refer to

FL-5, "Removal and Installation"

.

Combination meter

Ground

Continuity

Connector

Terminal

M34

34

Not existed

Fuel level sensor unit

Combination meter

Continuity

Connector

Terminal

Connector

Terminal

C5

5

M34

24

Existed

Terminals

Condition

Resistance (

Ω

)

(Approx.)

Height [mm (in)]

Fuel level sensor unit

2

5

Full

*

 (A)

46.0

282 (11.10)

Empty

*

 (B)

278.0

29 (1.14)

JSNIA3018ZZ

MWI

OIL PRESSURE SWITCH SIGNAL CIRCUIT

MWI-71

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

OIL PRESSURE SWITCH  SIGNAL CIRCUIT

Component Function Check

INFOID:0000000006221751

1.

CHECK COMBINATION METER INPUT SIGNAL

Select the “Data Monitor” for the “METER/M&A” and check the “OIL W/L” monitor value.

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006221752

1.

CHECK OIL PRESSURE SWITCH CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect IPDM E/R connector and oil pressure switch connector.

3.

Check continuity between IPDM E/R harness connector and oil pressure switch harness connector.

4.

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

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair harness or connector.

Component Inspection

INFOID:0000000006221753

1.

CHECK OIL PRESSURE SWITCH

Check continuity between oil pressure switch and ground.

Is the inspection result normal?

YES

>> INSPECTION END

“OIL W/L”

Ignition switch ON

: On

Engine running

: Off

Terminals

Continuity

(+)

(

−

)

IPDM E/R

Oil pressure switch

Connector

Terminal

Connector

Terminal

E13

24

E206

1

Existed

Terminals

Continuity

(+)

(

−

)

IPDM E/R

Ground

Connector

Terminal

E13

24

Not existed

Condition

Continuity

Engine stopped

Existed

Engine running

Not existed

ELF0044D

MWI-72

< DTC/CIRCUIT DIAGNOSIS >

OIL PRESSURE SWITCH SIGNAL CIRCUIT

NO

>> Replace oil pressure switch. Refer to 

EM-58, "Removal and Installation"

.

MWI

WASHER LEVEL SWITCH SIGNAL CIRCUIT

MWI-73

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

WASHER LEVEL SWITCH SIGNAL CIRCUIT

Diagnosis Procedure

INFOID:0000000006221754

1.

CHECK WASHER LEVEL SWITCH SIGNAL CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect combination meter connector and washer level switch connector.

3.

Check continuity between combination meter harness connector and washer level switch harness con-
nector.

4.

Check continuity between combination meter harness connector and ground.

Is the inspection result normal? 

YES

>> GO TO 2.

NO

>> Repair harness or connector.

2.

CHECK WASHER LEVEL SWITCH GROUND CIRCUIT

Check continuity between washer level switch connector and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair harness or connector.

Component Inspection

INFOID:0000000006221755

1.

CHECK WASHER LEVEL SWITCH

1.

Turn ignition switch OFF.

2.

Disconnect washer level switch connector. 

3.

Check washer level switch.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace washer level switch. Refer to 

WW-62, "Removal and Installation"

.

Terminals

Continuity

Combination meter

Washer level switch

Connector

Terminal

Connector

Terminal

M34

29

E54

1

Existed

Terminals

Continuity

Combination meter

Ground

Connector

Terminal

M34

29

Not existed

Terminals

Continuity

Washer level switch

Ground

Connector

Terminal

E54

2

Existed

Terminals

Condition

Continuity

Washer level switch

1

2

Washer level switch ON

Existed

Washer level switch OFF

Not existed