Infiniti M35/M45 Y50. Manual — part 359
COMBINATION METERS
DI-19
C
D
E
F
G
H
I
J
L
M
A
B
DI
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
.
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
.
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
DI-21
C
D
E
F
G
H
I
J
L
M
A
B
DI
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
"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
"CONSULT-II Function (ENGINE)"
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
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