Infiniti FX35 / FX45. Manual - part 286

COMBINATION METERS

DI-19

< SERVICE INFORMATION >

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Engine Coolant Temperature Signal Inspection

INFOID:0000000001328447

Symptom: Water temperature gauge indication is malfunction.

1.

CHECK COMBINATION METER INPUT SIGNAL 

1.

Connect CONSULT-III, and start engine.

2.

Select “METER/M&A” on CONSULT-III.

3.

Using “W TEMP METER” on “Data Monitor”, compare the value of “Data Monitor” with water temperature
gauge pointer of combination meter. 

OK or NG

OK

>> GO TO 2.

NG

>> Replace combination meter.

2.

CHECK UNIFIED METER AND A/C AMP. INPUT SIGNAL

Select “Data Monitor” of CONSULT-“COOLAN TEMP/S” of “ENGINE” and “W TEMP METER” of “METER/
M&A”.

OK or NG

OK

>> Perform self-diagnosis of ECM. Refer to 

EC-117, "CONSULT-III Function (ENGINE)"

 (VQ35DE)

or 

EC-695, "CONSULT-III Function (ENGINE)"

 (VK45DE).

NG

>> Replace unified meter and A/C amp. Refer to 

DI-32, "Removal and Installation of Unified Meter

and A/C Amp"

.

Fuel Level Sensor Signal Inspection

INFOID:0000000001328448

Symptom:

• Fuel gauge indication is malfunctioning.
• Low-fuel warning lamp indication is irregular.
NOTE:
The following symptoms are not malfunctions.

Fuel gauge

• Depending on vehicle posture or driving circumstance, the fuel level in the tank varies, and the pointer may

fluctuate.

• If the vehicle is fueled with the ignition switch ON, the pointer will move slowly.

Low-fuel warning lamp

• Depending on vehicle posture or driving circumstance, the fuel in the tank flows and the warning lamp ON

timing may change.

1.

CHECK COMBINATION METER INPUT SIGNAL

1.

Select “METER A/C AMP” on CONSULT-III.

2.

Using “FUEL METER” on “Data Monitor”, compare the value of “Data Monitor” with fuel gauge pointer of
combination meter. 

OK or NG

Water temperature gauge pointer

Reference value of data monitor [

°

C (

°

F)]

Hot

Approx. 130 (266)

Middle

Approx. 70 - 105 (158 - 221)

Cold

Approx. 50 (122)

Fuel gauge pointer

Reference value of data monitor [lit.]

Full

Approx. 86

Three quarters

Approx. 70

Half

Approx. 48

A quarter

Approx. 25

Empty

Approx. 9

DI-20

< SERVICE INFORMATION >

COMBINATION METERS

OK

>> GO TO 2.

NG

>> Replace combination meter.

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 (A) M56 terminal 28 and fuel level sensor unit (sub)
harness connector (B) B40 terminal 1.

4.

Check continuity between unified meter and A/C amp. harness
connector (A) M56 terminal 28 and ground.

OK or NG

OK

>> GO TO 3.

NG

>> 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 (A) B40 terminal 2 and fuel level sensor unit and fuel
pump (main) harness connector (B) B39 terminal 2.

3.

Check continuity between fuel level sensor unit (sub) harness
connector (A) B40 terminal 2 and ground.

OK or NG

OK

>> GO TO 4.

NG

>> Repair harness or connector.

4.

CHECK FUEL LEVEL SENSOR (MAIN) CIRCUIT

1.

Check continuity between fuel level sensor unit and fuel pump
(main) harness connector (A) B39 terminal 5 and unified meter
and A/C amp. harness connector (B) M56 terminal 36.

2.

Check continuity between fuel level sensor unit and fuel pump
(main) harness connector (A) B39 terminal 5 and ground.

OK or NG

OK

>> GO TO 5.

NG

>> Repair harness or connector.

5.

CHECK FUEL LEVEL SENSOR

Check components. Refer to 

DI-21, "Electrical Component Inspection"

.

OK or NG

OK

>> 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. Repair or replace malfunctioning part, if neces-
sary.

NG

>> Replace fuel level sensor unit.

28 – 1

: Continuity should exist.

28 – Ground

: Continuity should not exist.

SKIB8527E

2 – 2

: Continuity should exist.

2 – Ground

: Continuity should not exist.

SKIB8697E

5 – 36

: Continuity should exist.

5 – Ground

: Continuity should not exist.

SKIB8528E

COMBINATION METERS

DI-21

< SERVICE INFORMATION >

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Fuel Gauge Pointer Fluctuates, Indicator Wrong Value or Varies

INFOID:0000000001328449

1.

CHECK FUEL GAUGE FLUCTUATION

Test drive vehicle to see if gauge fluctuates only during driving or at the instant of stopping.

Does the indication value vary only during driving or at the instant of stopping?

YES

>> The pointer fluctuation may be caused by fuel level change in the fuel tank. Condition is normal.

NO

>> Ask the customer about the situation when the symptom occurs in detail, and perform the trouble

diagnosis.

Fuel Gauge Does Not Move to FULL Position

INFOID:0000000001328450

1.

QUESTION 1

Does it take a long time for the pointer to move to FULL position?

YES

>> GO TO 2.

NO

>> GO TO 3.

2.

QUESTION 2

Was the vehicle fueled with the ignition switch ON?

YES

>> Be sure to fuel the vehicle with the ignition switch OFF. Otherwise, it will take a long time to move

to FULL position because of the characteristic of the fuel gauge.

NO

>> GO TO 3.

3.

QUESTION 3

Is the vehicle parked on an incline?

YES

>> Check the fuel level indication with vehicle on a level surface.

NO

>> GO TO 4.

4.

QUESTION 4

During driving, does the fuel gauge pointer move gradually toward EMPTY position?

YES

>> Check the fuel level sensor unit. Refer to 

DI-21, "Electrical Component Inspection"

.

NO

>> The float arm may interfere or bind with any of the components in the fuel tank.

Odo/Trip Meter and Illumination Control Switch Inspection

INFOID:0000000001328451

Symptom: Illumination control does not operate.

1.

CHECK ODO/TRIP METER AND ILLUMINATION CONTROL SWITCH

1.

Remove odo/trip meter and illumination control switch. Refer to 

DI-24, "Removal and Installation of Odo/

Trip Meter and Illumination Control Switch"

.

2.

Check continuity odo/trip meter and illumination control switch. Refer to 

DI-21, "Electrical Component

Inspection"

.

OK or NG

OK

>> Replace combination meter.

NG

>> Replace odo/trip meter and illumination control switch.

Electrical Component Inspection

INFOID:0000000001328452

ODO/TRIP METER AND ILLUMINATION CONTROL SWITCH

DI-22

< SERVICE INFORMATION >

COMBINATION METERS

Check continuity between terminals 25, 26, 35 or 36 and 27.

FUEL LEVEL SENSOR UNIT

For removal, refer to 

FL-4, "Component"

.

Fuel Level Sensor Unit and Fuel Pump (Main) 

Check the resistance between terminals 2 and 5.

*1 and *2: When float rod is in contact with stopper.

• If the results of check are NG, check the fuel level sensor unit and

fuel pump (main) harness. Refer to "Fuel Level Sensor Unit and
Pump (Main) Harness".

Fuel Level Sensor Unit and Pump (Main) Harness

Check continuity at following terminals.

• If the results of check are NG, replace fuel pump assembly. If the

results of check are OK, replace fuel level sensor unit.

Fuel Level Sensor Unit (Sub)

Check resistance between terminals 1 and 2.

*1 and *2: When float rod is in contact with stopper.

Removal and Installation of Combination Meter

INFOID:0000000001328453

Refer to 

IP-10, "Component Parts Location"

.

Terminal

Condition

Continuity

25

27

Illumination control switch (–) is pressed.

Yes

Illumination control switch (–) is released.

No

26

Illumination control switch (+) is pressed.

Yes

Illumination control switch (+) is released.

No

35

Trip transfer switch is pressed.

Yes

Trip transfer switch is released.

No

36

Trip reset switch is pressed.

Yes

Trip reset switch is released.

No

SKIB8529E

Terminal

Float position

[mm (in)]

Resistance val-

ue [

Ω

]

2

5

*1

Full

236 (9.29)

Approx. 3

*2

Empty

29 (1.14)

Approx. 80

SKIB3550J

Terminal

Continuity

2 - Signal terminal (A)

Yes

5 - Ground terminal (B)

SKIB3551J

Terminal

Float position

[mm (in)]

Resistance val-

ue [

Ω

]

1

2

*1

Full

6 (0.24)

Approx. 3

*2

Empty

203 (7.99)

Approx. 48

SKIB8530E