Infiniti M35/M45 Y50. Manual - part 359

COMBINATION METERS

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Power Supply and Ground Circuit Inspection

NKS003U6

Symptom : When any power supply circuit is malfunction, the following function is not operative.

●

BAT : Meter face illumination, Dot matrix LCD, Ring illumination, Turn signal/hazard indicator lights

●

ACC : Meter face illumination, Dot matrix LCD, Pointer illumination, Speedometer, Tachometer

●

IGN : Meter face illumination, Dot matrix LCD, Pointer illumination, Speedometer, Tachometer, Engine
coolant temperature, Fuel gauge

1. 

CHECK FUSE

Check for blown fuses.

OK or NG

OK

>> GO TO 2.

NG

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

PG-3, "POWER

SUPPLY ROUTING CIRCUIT"

 .

2. 

CHECK POWER SUPPLY CIRCUIT

Check voltage between combination meter harness connector and
ground.

OK or NG

OK

>> GO TO 3.

NG

>> 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
and ground.

OK or NG

OK

>> INSPECTION END

NG

>> Repair harness or connector.

Power source

Fuse No.

Battery

21

Ignition switch ACC or ON 

6

Ignition switch ON or START 

14

Terminals

Ignition switch position

(+)

(–)

OFF

ACC

ON

Combination meter

connector

Terminal

M52

23

Ground

Battery
voltage

Battery
voltage

Battery
voltage

2

0  V

Battery
voltage

Battery
voltage

12

0 V

0 V

Battery
voltage

PKIB7637E

Combination meter

connector

Terminal

Ground

Continuity

M52

9 

Yes

10

11

PKIB7638E

DI-20

COMBINATION METERS

Vehicle Speed Signal Inspection

NKS003U7

Symptom: Odo/trip meter indication is malfunction.

1. 

CHECK UNIFIED METER AND A/C AMP. INPUT SIGNAL

1.

Connect CONSULT-II, and start engine.

2.

Compare the value in “SPEED METER” of “DATA MONITOR” in
“METER A/C AMP” to that in speedometer in the combination
meter during driving.

Is the value in speedometer almost same as that in the monitor?

YES

>> Preform self-diagnosis of ABS actuator and electric unit

(control unit). Refer to 

BRC-23, "CONSULT-II Functions

(ABS)"

 .

NO

>> GO TO 2.

2. 

CHECK UNIFIED METER AND A/C AMP. OUTPUT SIGNAL 

1.

Start engine and drive vehicle at approximately 40 km/h (25
MPH).

2.

Check voltage signal between unified meter and A/C amp. har-
ness connector and ground.

NOTE:
Maximum voltage may be 5 V due to specifications (connected units).

OK or NG

OK

>> GO TO 3.

NG-1

>> If monitor indicates “0 V” constantly, perform the following.

1. Check each unit inputting vehicle speed signal (8 pulse). Malfunction is caused by short circuit

between each unit and unified meter and A/C amp.

2. Repair or replace malfunctioning parts.

NG-2

>> If monitor indicates “5 V” or “12 V” constantly, replace unified meter and A/C amp.

PKIB7639E

Terminals

Voltage (Approx.)

(+)

(–)

Unified meter and 

A/C amp.connector

Terminal

M64

28

Ground

PKIB7640E

PKIA1935E

COMBINATION METERS

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3. 

CHECK CONTINUITY BETWEEN COMBINATION METER AND UNIFIED METER AND A/C AMP. 

1.

Turn ignition switch OFF.

2.

Disconnect combination meter connector and unified meter and
A/C amp. connector.

3.

Check continuity between combination meter harness connector
(A) and unified meter and A/C amp. harness connector (B).

OK or NG

OK

>> Replace combination meter.

NG

>> Repair harness or connector.

Engine Speed Signal Inspection 

NKS003U8

Symptom: Tachometer indication is malfunction.

1. 

CHECK UNIFIED METER AND A/C AMP. INPUT SIGNAL

1.

Start engine and select “METER A/C AMP” on CONSULT-II.

2.

Using “TACHO METER” on “DATA MONITOR”, compare the
value of “DATA MONITOR” to that of tachometer of combination
meter. 

Is the value in tachometer almost same as the value in the monitor?

OK

>> GO TO 2.

NG

>> Replace combination meter. (Perform self-diagnosis of

ECM when the value in the monitor indicates 8191.875
rpm. Then repair or replace the malfunction part.)

2. 

CHECK ECM OUTPUT SIGNAL

1.

Select “ENGINE” on CONSULT-II.

2.

Using “ENG SPEED” on “DATA MONITOR”, print out the CON-
SULT-II screen when the engine is idling.

3.

Select “METER A/C AMP” on CONSULT-II.

4.

Using “TACHO METER” on “DATA MONITOR”, compare the
value of “DATA MONITOR” of the idling speed to that of the
“ENG SPEED”.

OK or NG

OK

>> Perform self-diagnosis of ECM. Refer to 

EC-123, "CON-

SULT-II Function (ENGINE)"

  (for VQ35DE) or 

EC-826,

"CONSULT-II Function (ENGINE)"

  (for VK45DE).

NG

>> Replace unified meter and A/C amp.

A

B

Continuity

Connector

Terminal Connector

Terminal 

M52

1  

M64

28

Yes

PKIB7641E

PKIA2090E

SKIA4367E

DI-22

COMBINATION METERS

Engine Coolant Temperature Signal Inspection

NKS003U9

Symptom: Water temperature gauge indication is malfunction.

1. 

CHECK UNIFIED METER AND A/C AMP. INPUT SIGNAL 

1.

Start engine and select “METER A/C AMP” on CONSULT-II.

2.

Using “W TEMP METER” on “DATA MONITOR”, compare the
value of “DATA MONITOR” to the indication of water tempera-
ture gauge of combination meter. 

Is the indication of water temperature gauge same as the value in
the monitor?

OK

>> GO TO 2.

NG

>> Replace combination meter. [Perform self-diagnosis of ECM when the value in the monitor indi-

cates 215

°

C (419

°

F). Then repair or replace the malfunction part.]

2. 

CHECK UNIFIED METER AND A/C AMP. INPUT SIGNAL

1.

Select “ENGINE” on CONSULT-II.

2.

Using “COOLAN TEMP/S” on “DATA MONITOR”, print out the
CONSULT-II screen.

3.

Select “METER A/C AMP” on CONSULT-II.

4.

Using “W TEMP METER” on “DATA MONITOR”, compare the
value of “DATA MONITOR” to that of the “COOLAN TEMP/S”.

OK or NG

OK

>> Perform self-diagnosis of ECM. Refer to 

EC-123, "CON-

SULT-II Function (ENGINE)"

  (for VQ35DE) or 

EC-826,

"CONSULT-II Function (ENGINE)"

  (for VK45DE).

NG

>> Replace unified meter and A/C amp.

Fuel Level Sensor Signal Inspection

NKS003UA

Symptom:

●

Fuel gauge indication is malfunction.

●

Low-fuel warning lamp indication is irregular.

NOTE:
The following symptoms are not malfunction.

Fuel level sensor unit

●

Depending on vehicle position 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 position or driving circumstance, the fuel in the tank flows and the warning lamp ON
timing may change.

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)

PKIA2091E

SKIA4368E