Infiniti F50. Manual - part 294

COMBINATION METERS

DI-19

C

D

E

F

G

H

I

J

L

M

A

B

DI

Work Flow

EKS001C6

1. 

CHECK WARNING LAMPS

1.

Turn ignition switch ON.

2.

Warning lamps should illuminate (seat belt warning or door warning etc.).

Do warning lamps illuminate?

YES

>> GO TO 2.

NO

>> Power supply and ground check. Refer to 

DI-21, "Power Supply and Ground Circuit Check"

 .

2. 

CHECK INDICATOR LAMPS

Meter/gauges/A/T indicator should indicate.
Do indicators indicate?

YES

>> GO TO 3.

NO

>> Fluorescent lamp check. Refer to 

DI-22, "Fluorescent Lamp Check"

 .

3. 

CHECK SELF-DIAGNOSIS MODE OPERATION

Preform self-diagnosis mode. Refer to 

DI-18, "Meter/Gauges Operation, Odo/Trip Meter, A/T Indicator and

ICC System Display"

Can diagnosis mode be activated?

YES

>> GO TO 4.

NO

>> Replace unified meter control unit (sub).

4. 

CHECK SEGMENTS

Check odo/trip meter segment, A/T indicator or ICC system display segment.

Do all segments illuminate?

YES

>> GO TO 5.

NO

>>

●

Check A/T indicator. Refer to  

DI-55, "A/T Indicator Does Not Illuminate"

 .

●

Check ICC system display. Refer to 

DI-26, "ICC System Display Does Not Illuminate"

 .

●

Replace unified meter control unit (sub) and meter and gauge assembly.

5. 

CHECK SELF-DIAGNOSIS MODE

Check meter/gauge operation in self-diagnosis mode. Refer to 

DI-

18, "Meter/Gauges Operation, Odo/Trip Meter, A/T Indicator and ICC
System Display"

OK or NG

OK

>> Symptom chart 2.

NG

>> Symptom chart 1.

SKIA3720E

SKIA0484E

DI-20

COMBINATION METERS

Trouble Diagnoses

EKS00101

SYMPTOM CHART 1 (MALFUNCTION INDICATED DIAGNOSIS MODE)

SYMPTOM CHART 2 (NO MALFUNCTION INDICATED IN DIAGNOSIS MODE)

Symptom

Possible cause

Repair procedure

Speedometer or odo/trip 
meter indicate(s) malfunction 
in diagnosis mode.

●

Meter and gauge assembly

●

Unified meter control unit 

●

Replace unified meter control unit (main and sub) and meter and 
gauge assembly.

Multiple meter/gauge indi-
cate malfunction in diagnosis 
mode.

●

Harness connector condition

●

Unified meter control unit 

●

Check connector conditions in combination meter.

●

Replace unified meter control unit (sub).

One of speedometer/ 
tachometer/fuel gauge/ water 
temp. gauge is malfunction-
ing.

●

Meter/Gauge

●

Unified meter control unit

●

Replace meter and gauge assembly and replace unified meter 
control unit (sub).

Symptom

Possible case

Repair order

Speedometer and odo/trip 
meter are malfunctioning.

1. Signal

–

Speedometer, odo/trip meter

2. Harness connector condition

3. Unified meter control unit 

1. Check vehicle speed signal.

INSPECTION/VEHICLE SPEED SIGNAL (Refer to 

DI-23, 

"Inspection/Vehicle Speed Signal"

 )

2. Check connector conditions in combination meter.

3. Replace unified meter control unit (sub).

Multiple meter/gauge are mal-
functioning, (except for 
speedometer, odo/trip meter)

1. Harness connector condition

2. Unified meter control unit

1. Check connector conditions in combination meter.

2. Replace unified meter control unit.

One of tachometer/fuel 
gauge/ water temp. gauge is 
malfunctioning.

1. Signal

–

Tachometer

–

Fuel gauge

–

Water temp.gauge

2. Harness connector condition

3. Unified meter control unit

1. Check signal for malfunctioning meter/gauge.

–

INSPECTION/ENGINE SPEED SIGNAL (Refer to 

DI-22, 

"Inspection/Engine Speed Signal"

 )

–

INSPECTION/FUEL LEVEL SENSOR UNIT (Refer to 

DI-23, 

"Inspection/Fuel Level Sensor Unit"

 )

–

INSPECTION/ENGINE COOLANT TEMPERATURE SENSOR. 
(Refer to 

DI-23, "Inspection/Water Temperature Gauge"

 )

2. Check connector conditions in combination meter.

3. Replace unified meter control unit (sub).

COMBINATION METERS

DI-21

C

D

E

F

G

H

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J

L

M

A

B

DI

Power Supply and Ground Circuit Check

EKS00102

1. 

CHECK FUSES

Check that any of the fuses in combination meter is blown.

OK or NG

OK

>> GO TO 2.

NG

>> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to 

PG-

2, "POWER SUPPLY ROUTING"

 .

2. 

CHECK POWER SUPPLY CIRCUIT

1.

Disconnect the combination meter connector.

2.

Check voltage between combination meter and ground.

OK or NG

OK

>> GO TO 3.

NG

>> Check harness for open or short between combination meter and fuse.

3. 

CHECK GROUND CIRCUIT

Check continuity between combination meter and ground.

OK or NG

OK

>> Inspection end.

NG

>> Check ground harness.

Unit

Power source

Fuse No.

Combination meter

Battery 6

Ignition switch (ON) 

9

Ignition switch (ACC)

21

Terminals

Ignition switch position

(+)

(–)

OFF

ACC

ON

Connector

Terminal

(Wire color)

M41

1(L/OR)

Ground

0V

Battery 
voltage

Battery 
voltage

M43

57(Y/G)

Battery 
voltage

Battery

 voltage

Battery 
voltage

M43

59(G)

0V

0V

Battery 
voltage

SKIA0476E

Terminals

Continuity

(+)

(–)

Connector

Terminal 

(Wire color)

M43

60 (B)

Ground

Yes

61 (B)

SKIA3721E

DI-22

COMBINATION METERS

Fluorescent Lamp Check

EKS001C7

1. 

CHECK FLEXIBLE PRINT CIRCUIT (FPC) CONNECTOR 

1.

Disconnect fluorescent lamp harness connector.

2.

Check terminals for damage or loose connection. Then reconnect connectors.

3.

Check FPC connector for damage or loose connection. Then reconnect connector.

OK or NG

OK

>> Replace unified meter control unit (main and sub) and fluorescent lamp.

NG

>>

●

Repair or replace fluorescent harness connector.

●

Repair or replace FPC connector.

Inspection/Engine Speed Signal

EKS00104

1. 

CHECK VISUAL

At the engine start, does the pointer on the tachometer fluctuate?

Is the fluctuation acceptable?

YES

>> GO TO 2.

NO

>> GO TO 3.

2. 

CHECK ENGINE SPEED

Compare the engine speed and the values indicated in tachometer. 

Does the engine speed correspond to the speed indicated?

YES

>> Tachometer is OK.

NO

>> Replace unified meter control unit (sub) and meter and gauges assembly.

3. 

CHECK ECM SYSTEM

Preform ECM self-diagnosis. Refer to 

EC-52, "Emission-related Diagnostic Information"

 .

OK or NG

YES

>> GO TO 4.

NO

>> Perform “Diagnostic Procedure” for displayed DTC.

4. 

CHECK SELF-DIAGNOSIS

Preform the combination meter self-diagnosis mode, refer to 

DI-18, "Meter/Gauges Operation, Odo/Trip

Meter, A/T Indicator and ICC System Display"

 .

OK or NG

OK

>> Combination meter is OK.

NG

>> Replace unified meter control unit (sub).