Infiniti QX56 (JA60). Manual — part 696
MWI
METER SYSTEM
MWI-19
< FUNCTION DIAGNOSIS >
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WARNING LAMPS/INDICATOR LAMPS : System Description
INFOID:0000000005146063
OIL PRESSURE WARNING LAMP
• IPDM E/R reads the ON/OFF signals from the oil pressure switch and transmits the oil pressure switch sig-
nal to the combination meter via BCM with the CAN communication line.
• The combination meter turns the oil pressure warning lamp ON/OFF according to the oil pressure switch sig-
nal received via CAN communication.
WARNING LAMPS/INDICATOR LAMPS : Component Parts Location
INFOID:0000000005146064
WARNING LAMPS/INDICATOR LAMPS : Component Description
INFOID:0000000005146065
INFORMATION DISPLAY
1.
IPDM E/R E122, E124
2.
Combination meter M23, M24
3.
Fuel level sensor unit and fuel pump
C5 (view with inspection hole cover re-
moved)
4.
ECM E16 (view with battery removed) 5.
ABS actuator and electric unit (control
unit) E125
6.
Oil pressure switch F4
A: Oil pan (upper)
7.
A/T assembly F9
8.
BCM M18, M19 (view with instrument
lower panel LH removed)
AWNIA0201ZZ
Unit
Description
Combination meter
Turns the oil pressure warning lamp ON/OFF according to the oil pressure switch signal received
from BCM by means of communication.
IPDM E/R
Reads the ON/OFF signals from the oil pressure switch and transmits the oil pressure switch signal
to the combination meter via BCM with the CAN communication line.
Oil pressure switch
Refer to
BCM
Transmits the oil pressure switch signal received from IPDM E/R via CAN communication to the
combination meter via CAN communication.
MWI-20
< FUNCTION DIAGNOSIS >
METER SYSTEM
INFORMATION DISPLAY : System Diagram
INFOID:0000000005146066
INFORMATION DISPLAY : System Description
INFOID:0000000005146067
FUNCTION
The information display can indicate the following items.
• Intelligent Key operation information
• Warning/Indication messages (Door/liftgate/liftgate glass open, low fuel, low washer fluid, parking brake, A/T
oil temp)
DOOR OPEN WARNING
This warning appears when the ignition switch is ON and the front door LH, front door RH, rear door LH, rear
door RH, back door or glass hatch is opened. The BCM receives a door switch signal from the front door
switch LH, front door switch RH, rear door switch LH, rear door switch RH, back door latch and glass hatch
ajar switch. The BCM sends the door switch signal to the combination meter via CAN communication lines.
Then, when the ignition switch is turned ON, the warning message is displayed.
LOW FUEL WARNING
This warning appears when the fuel level in the fuel tank is less than approximately 11.4 (3 US gal, 2.5 Imp
gal). A variable resistor signal is supplied to the combination meter from the fuel level sensor unit to determine
the amount of fuel in the fuel tank.
LOW WINDSHIELD WASHER FLUID WARNING
This warning appears when the windshield washer fluid level is low. When the windshield washer fluid level is
low, the washer level switch provides a ground signal to the combination meter (unified meter control unit).
Once fluid is added, the message will stay on for 30 seconds and then turn off.
PARKING BRAKE INDICATOR
When the parking brake is applied, the parking brake switch provides a ground signal to the combination
meter (unified meter control unit). Then, when the ignition switch is turned ON and vehicle speed is greater
than 7 km/h (4 MPH), the message is displayed.
Refer to Owner’s Manual for additional information display items.
AWNIA0202GB
MWI
METER SYSTEM
MWI-21
< FUNCTION DIAGNOSIS >
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INFORMATION DISPLAY : Component Parts Location
INFOID:0000000005146068
INFORMATION DISPLAY : Component Description
INFOID:0000000005146069
1.
IPDM E/R E122, E124
2.
Combination meter M23, M24
3.
Fuel level sensor unit and fuel pump
C5 (view with inspection hole cover re-
moved)
4.
ECM E16 (view with battery removed) 5.
ABS actuator and electric unit (control
unit) E125
6.
Oil pressure switch F4
A: Oil pan (upper)
7.
A/T assembly F9
8.
BCM M18, M19 (view with instrument
lower panel LH removed)
AWNIA0201ZZ
Unit
Description
Combination meter
Controls the information display according to the signal received from each unit.
Fuel level sensor unit
Refer to
BCM
Transmits signals provided by various units to the combination meter via CAN communication line.
Washer level switch
Transmits the washer level signal to the combination meter.
Parking brake switch
Refer to
Door switch
Transmits the door switch signals to BCM.
Back door latch (door ajar switch) Transmits the back door switch signal to BCM.
Glass hatch ajar switch
Transmits the glass hatch ajar switch signal to BCM.
TCM
Transmits A/T oil temperature signal to the combination meter with CAN communication line.
MWI-22
< FUNCTION DIAGNOSIS >
DIAGNOSIS SYSTEM (METER)
DIAGNOSIS SYSTEM (METER)
Diagnosis Description
INFOID:0000000005146071
SELF-DIAGNOSIS MODE
The following items can be checked during Combination Meter Self-Diagnosis Mode.
• Gauge sweep and present gauge values.
• Illuminates all odometer/trip meters and A/T indicator segments.
• Illuminates all micro controlled lamps/LEDs regardless of switch position.
• Displays estimated present battery voltage.
• Displays seat belt buckle switch LH status.
OPERATION PROCEDURE
NOTE:
• Once entered, combination meter self-diagnosis mode will function with the ignition switch in ON or START.
Combination meter self-diagnosis mode will exit upon turning the ignition switch to OFF or ACC.
• If the diagnosis function is activated with trip A displayed, the mileage on trip A is reset to 0000.0. (Trip B
operates the same way.)
To initiate combination meter self-diagnosis mode, refer to the following procedure.
1. Turn the ignition switch ON, while pressing the odometer/trip meter switch for 5 - 8 seconds. When the
diagnosis function is activated, the odometer/trip meter will display tESt.
NOTE:
Check combination meter power supply and ground circuit when self-diagnosis mode of combination meter
does not start. Refer to
MWI-28, "COMBINATION METER : Diagnosis Procedure"
. Replace combination
meter if normal. Refer to
MWI-100, "Removal and Installation"
.
COMBINATION METER SELF-DIAGNOSIS MODE FUNCTIONS
To interpret combination meter self-diagnosis mode functions, refer to the following table.
Event
Odometer Display
Description of Test/Data
Notes:
Odometer/trip meter A/B
switch held from 5 to 8
seconds (or until re-
leased)
tESt
Initiating self-diagnosis mode
Switch released
GAGE
Performs sweep of all
gauges, then displays
present gauge values.
Gauges sweep within 10 seconds
Switch pressed
(All segments illuminated)
Lights all LCD segments.
Compare with picture.
Switch pressed
bulb
Illuminates all micro-con-
trolled lamps/LEDs.
Part may not be configured for all
lamps (functions) that turn on dur-
ing test. This is normal.
Switch pressed
r XXXX, FAIL
Return to normal opera-
tion of all lamps/LEDs and
displays “r XXXX”.
If a malfunction exists, “FAIL” will
flash.
Switch pressed
nrXXXX
Displays Hex ROM rev as
stored in NVM.
Switch pressed
EE XX, FAIL
Displays “EE XX”.
If a malfunction exists, “FAIL” will
flash.
Switch pressed
dtXXXX
Hex coding of final manu-
facturing test date.
AWNIA0203ZZ
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