2007 INFINITI QX56 check oil

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CONTENTS
DRIVER INFORMATION SYSTEM
SERVICE INFORMATION .. ..........................3
PRECAUTION ................................................ .....3
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
3
PREPARATION ...................................................4
Commercial Service Tool .................................... ......4
COMBINATION METERS ...................................5
Component Parts and Harness Connector Loca-
tion ...................................................................... ......
5
System Description ...................................................5
Arrangement of Combination Meter ..........................7
Internal Circuit ...........................................................8
Wiring Diagram - METER - .......................................9
Combination Meter Harness Connector Terminal
Layout .....................................................................
11
Terminal and Reference Value for Combination
Meter .......................................................................
11
Self-Diagnosis Mode of Combination Meter ........ ....12
How to Proceed with Trouble Diagnosis ............. ....15
Preliminary Check ...................................................15
Symptom Chart .......................................................16
Power Supply and Ground Circuit Inspection .........16
Vehicle Speed Signal Inspection .............................17
Engine Oil Pressure Signal Inspection ....................17
Water Temperature Signal Inspection .....................18
Engine Speed Signal Inspection ......................... ....18
Fuel Level Sensor Unit Inspection ...................... ....18
Fuel Gauge Fluctuates, Indicates Wrong Value, or
Varies .................................................................. ....
20
Fuel Gauge Does Not Move to Full-position ...........20
Electrical Component Inspection ......................... ....21
Removal and Installation of Combination Meter .....21
COMPASS AND THERMOMETER ................ ....22
System Description ............................................. ....22
Wiring Diagram - COMPAS - ..................................23
Trouble Diagnosis ............................................... ....23
Calibration Procedure for Compass .................... ....24
WARNING LAMPS ............................................26
Schematic ............................................................ ....26
Wiring Diagram - WARN - .......................................27
Oil Pressure Warning Lamp Stays Off (Ignition
Switch ON) .......................................................... ....
32
Oil Pressure Warning Lamp Does Not Turn Off
(Oil Pressure Is Normal) ...................................... ....
33
A/T INDICATOR ................................................34
Wiring Diagram - AT/IND - .......................................34
A/T Indicator Does Not Illuminate ............................34
WARNING CHIME .............................................36
Component Parts and Harness Connector Loca-
tion ....................................................................... ....
36
System Description ..................................................36
CAN Communication System Description ...............37
Wiring Diagram - CHIME - .......................................38
Terminal and Reference Value for BCM ..................39
Terminal and Reference Value for Combination
Meter ................................................................... ....
39
How to Proceed with Trouble Diagnosis ..................40
Preliminary Check ............................................... ....40
CONSULT-II Function (BCM) ..................................40
All Warning Chimes Do Not Operate .......................41
Key Warning Chime and Light Warning Chime Do
Not Operate (Seat Belt Warning Chime Does Op-
erate) .......................................................................
41
Key Warning Chime Does Not Operate ...................42
Light Warning Chime Does Not Operate .................44
Seat Belt Warning Chime Does Not Operate ..........44
REAR SONAR SYSTEM ...................................46
Component Parts and Harness Connector Loca-
tion ....................................................................... ....
46
System Description ..................................................46
Wiring Diagram - SONAR - ......................................48
Sonar Control Unit Harness Connector Terminal
Layout ......................................................................
50

COMBINATION METERSDI-5
< SERVICE INFORMATION >
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COMBINATION METERS
Component Parts and Har ness Connector LocationINFOID:0000000003533479
System DescriptionINFOID:0000000003533480
UNIFIED METER CONTROL UNIT
• Speedometer, odometer, tachometer, fuel gauge, oil pressure gauge, voltage gauge, A/T oil temperature
gauge, and water temperature gauge are controlled by the unified meter control unit, which is built into the
combination meter.
• Warning indicators are controlled by signals drawn fr om the CAN communication system, BCM (body control
module), and components connected directly to the combination meter.
• Digital meter is adopted for odometer/trip meters*, as well as the A/T position indicator display. *The record of the odometer is kept ev en if the battery cable is disconnected.
• Odometer/trip meters and A/T indicator segments can be checked in diagnosis mode.
• Meters/gauges can be checked in diagnosis mode.
Illumination control
The unified meter control unit outputs the speedometer, odometer/trip meters, tachometer, oil pressure gauge,
voltage meter, A/T indicator, A/T temperature gauge, fuel and temperature gauge lighting when the ignition
switch is turned on. When the lighting switch is turned on, the illumination control switch can be used to adjust
the brightness of the combination meter illuminati on and the odometer/trip meters and meter illumination.
When the ignition switch is turned from the OFF to the ON position, the combination meter dial lighting will
remain off for 0.7 seconds. For additional combination meter illumination control information, refer to LT-120,
"System Description".
1. IPDM E/R E122 2. Combination meter M24 3. Fuel level sensor unit and fuel pump
C5 (view with inspection hole cover
removed)
4. ECM E16 (view with battery re- moved) 5. ABS actuator and electric unit (con-
trol unit) E125 6. Oil pressure switch F4
A. Oil pan (upper)
7. A/T assembly F9
WKIA5718E

COMBINATION METERSDI-13
< SERVICE INFORMATION >
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Next test requested EprXX Displays 8-bit software
configuration value in Hex
format.Bit Coding
7-2 = reserved for future use
1 = A/T Oil Temp (gauge)
0 = not present
1 = present
1 = Odo Units 0 = kilometers
1 = miles
Next test requested 1nFXX Displays 8-bit market info
value in Hex format.$31 = USA
$2A = Canada
Next test requested cYLXX Displays 8-bit engine con-
figuration value in Hex for-
mat.$08 = 8 cylinder
$06 = 6 cylinder
Next test requested bulb Illuminates all micro-con-
trolled lamps/LEDs re-
gardless of SW
configuration.
Next test requested D-HI Meter/LCD Illumination.
Next test requested (All segments illuminated) Lights all odometer/trip
meter, fuel, and engine
temperature display seg-
ments.Full daytime brightness all LCD
segments active
Next test requested N-HI Meter/LCD Illumination.
Next test requested (All segments illuminated) Lights all odometer/trip
meter, fuel, and engine
temperature display seg-
ments.Full nighttime brightness all
LCD segments active
Next test requested N-LO Meter/LCD Illumination.
Next test requested (All segments illuminated) Lights all odometer/trip
meter, fuel, and engine
temperature display seg-
ments.Min. nighttime brightness all
LCD segments active
Next test requested dS XX Current dimming step. 1-21
Next test requested EE XX, FAIL Hex EE level. If EE check-
sum fault exists, display
alternates between "EE
XX" and "FAIL".
Next test requested dtXXXX Hex coding of final manu-
facturing test date.
Next test requested GAGE Performs sweep of all
gauges, then displays
present gauge values.
Performs checksum tests
on ROM and EE.Gauges sweep within 10 sec-
onds
Next test requested FFXXXX Displays 16-bit fuel flow
constant "Q" in tenths of
cc/min in Hex format.$0000 - $FFFF
Next test requested tF Displays 16-bit tire factor
"A" in hundredths in Hex
format.$0000 - $FFFF
Next test requested oP Current oil pressure value
in A/D counts in hex for-
mat.
$00 - $FF
Next test requested ot1XX Displays oil pressure tell-
tale "on" threshold in A/D
counts in Hex format.$00 - $FF
Event Odometer Display Description of Test/Data Notes:

COMBINATION METERSDI-15
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How to Proceed with Trouble DiagnosisINFOID:0000000003533487
1. Confirm the symptom or customer complaint.
2. Perform preliminary check. Refer to DI-15, "
Preliminary Check".
3. According to the symptom chart, repair or replace the cause of the symptom.
4. Does the meter operate normally? If so, go to 5. If not, go to 2.
5. Inspection End.
Preliminary CheckINFOID:0000000003533488
1.CHECK WARNING INDICATOR ILLUMINATION
1. Turn ignition switch ON.
2. Make sure warning indicators (such as malfunction indicator lamp and oil pressure low/coolant tempera- ture high warning indicator) illuminate.
Do warning indicators illuminate?
YES >> GO TO 2.
NO >> Check ignition power supply system of combination meter. Refer to DI-16, "
Power Supply and
Ground Circuit Inspection".
2.CHECK OPERATION OF SELF-DIAGNOSIS MODE (COMBINATION METER)
Next test requested A04XXXA/D port A/D value (non-
ratioed).0-255
Next test requested A05XXX A/D port A/D value (non-
ratioed).
0-255
Next test requested A06XXX A/D port A/D value (non-
ratioed).0-255
Next test requested A07XXX A/D port A/D value (non-
ratioed).0-255
Next test requested A08XXX A/D port A/D value (non-
ratioed).
0-255
Next test requested A09XXX A/D port A/D value (non-
ratioed).0-255
Next test requested A10XXX A/D port A/D value (non-
ratioed).0-255
Next test requested A11XXX A/D port A/D value (non-
ratioed).
0-255
Next test requested A12XXX A/D port A/D value (non-
ratioed).0-255
Next test requested A13XXX A/D port A/D value (non-
ratioed).0-255
Next test requested A14XXX A/D port A/D value (non-
ratioed).
0-255
Next test requested A15XXX A/D port A/D value (non-
ratioed).0-255
Next test requested PA0-XX Hex value representing
state of A/D ports 0-7.
Next test requested PA1-XX Hex value representing
state of A/D ports 0-7.
Next test requested Thr-XXX Decimal value of ther-
mistor A/D reading.0-255
Next test requested rXXXX, FAIL Return to beginning of self-di-
agnosis.
Event Odometer Display Description of Test/Data Notes:

DI-16
< SERVICE INFORMATION >
COMBINATION METERS
Perform self-diagnosis mode of combination meter. Refer to DI-12, "Self-Diagnosis Mode of Combination
Meter".
Does self-diagnosis mode operate normally?
YES >> GO TO 3.
NO >> Check combination meter power supply and ground circuit. Refer to DI-16, "
Power Supply and
Ground Circuit Inspection".
3.CHECK ODOMETER OPERATION
Check segment display status of odometer.
Is the display normal?
YES >> GO TO 4.
NO >> Replace the combination meter. Refer to IP-10,
"Removal and Installation".
4.CHECK COMBINATION METER CIRCUIT
Check indication of each meter/gauge in self-diagnosis mode.
OK or NG
OK >> Go to DI-16, "Symptom Chart".
NG >> Replace the combination meter. Refer to IP-10,
"Removal and Installation".
Symptom ChartINFOID:0000000003533489
Power Supply and Ground Circuit InspectionINFOID:0000000003533490
1.CHECK FUSES
Check for blown combination meter fuses.
WKIA1531E
WKIA1814E
Trouble phenomenon Possible cause
Improper tachometer indication. Refer to DI-18, "
Engine Speed Signal Inspection".
Improper water temperature gauge indication. Refer to DI-18, "
Water Temperature Signal Inspection".
Improper speedometer or odometer. Refer to DI-17, "
Vehicle Speed Signal Inspection".
Improper fuel gauge indication. Refer to DI-18, "
Fuel Level Sensor Unit Inspection".
Fuel warning lamp indication is irregular.
Improper A/T oil temperature gauge indication Refer to AT- 11 9
.
Improper voltage gauge indication Replace combination meter. Refer to IP-10, "
Removal and Instal-
lation".
More than one gauge does not give proper indication.
Improper A/T position indication. Refer to DI-34
.
Illumination control does not operate properly. Refer to LT- 1 2 0
.

COMBINATION METERSDI-17
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Refer to DI-9, "Wiring Diagram - METER -".
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate caus e of malfunction before installing new fuse. Refer to PG-
3.
2.CHECK POWER SUPPLY CIRCUIT
1. Disconnect combination meter connector.
2. Check voltage between combination meter harness connector terminals and ground.
OK or NG
OK >> GO TO 3.
NG >> Check the harness for open between combination meter and fuse.
3.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between combination meter harness connector terminal and ground.
OK or NG
OK >> Inspection End.
NG >> Repair harness or connector.
Vehicle Speed Signal InspectionINFOID:0000000003533491
1.CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAGNOSIS
Refer to BRC-26, "
CONSULT-II Function (ABS)".
OK or NG
OK >> Replace the combination meter. Refer to IP-10, "Removal and Installation".
NG >> Perform "Diagnostic Procedure" for displayed DTC. Refer to BRC-26, "
CONSULT-II Function
(ABS)".
Engine Oil Pressure Signal InspectionINFOID:0000000003533492
1.CHECK SELF-DIAGNOSTIC RESULTS OF IPDM E/R
Select "IPDM E/R" on CONSULT-II, and perform self-diagnosis of IPDM E/R. Refer to PG-18, "
CONSULT-II
Function (IPDM E/R)".
Unit Power source Fuse No.
Combination meter Battery 19
Ignition switch ON or START 14
Terminals Ignition switch position
(+) (–) OFF ACC ON
Connector Terminal
M24 8
Ground Battery
voltage Battery
voltage Battery
voltage
24 0V 0V Battery
voltage
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Te r m i n a l s
Continuity
(+)
(–)
Connector Terminal
M24 17 Ground Yes
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DI-18
< SERVICE INFORMATION >
COMBINATION METERS
Self-diagnostic results content
No malfunction detected>>GO TO 2.
Malfunction detected>>GO TO PG-18, "
CONSULT-II Function (IPDM E/R)".
2.CHECK IPDM E/R INPUT SIGNAL
Select "IPDM E/R" on CONSULT-II. Operate ignition switch with "OIL
P SW" of "DATA MONITOR" and check operation status.
OK or NG
OK >> Replace combination meter. Refer to IP-10, "Removal
and Installation".
NG >> GO TO 3.
3.CHECK OIL PRESSURE SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector E122 and oil pressure switch
connector F4.
3. Check continuity between IPDM E/R harness connector E122 (A) terminal 42 and oil pressure switch harness connector F4 (B)
terminal 1.
OK or NG
OK >> GO TO 4.
NG >> Repair harness or connector.
4.CHECK OIL PRESSURE SWITCH
Check oil pressure switch. Refer to DI-21, "
Electrical Component Inspection".
OK or NG
OK >> Replace IPDM E/R. Refer to PG-28, "Removal and Installation of IPDM E/R".
NG >> Replace oil pressure switch.
Water Temperature Signal InspectionINFOID:0000000003533493
1.CHECK ECM SELF-DIAGNOSIS
Perform ECM self-diagnosis. Refer to E C - 111 , "
CONSULT-II Function (ENGINE)".
OK or NG
OK >> Replace the combination meter. Refer to IP-10, "Removal and Installation".
NG >> Perform "Diagnostic procedure" for displayed DTC. Refer to EC-82
.
Engine Speed Signal InspectionINFOID:0000000003533494
1.CHECK ECM SELF-DIAGNOSIS
Perform ECM self-diagnosis. Refer to E C - 111 , "
CONSULT-II Function (ENGINE)".
OK or NG
OK >> Replace the combination meter. Refer to IP-10, "Removal and Installation".
NG >> Perform "Diagnostic procedure" for displayed DTC. Refer to EC-82
.
Fuel Level Sensor Unit InspectionINFOID:0000000003533495
FUEL LEVEL SENSOR UNIT
The following symptoms do not indicate a malfunction.When ignition switch is in ON
position (Engine stopped)
: OIL P SW CLOSE
When engine running : OIL P SW OPEN
LKIA0403E
Continuity should exist.
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COMBINATION METERS
DI-21
< SERVICE INFORMATION >
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4.CHECK POINTER MOVEMENT TO EMPTY-POSITION
During driving, does the fuel gauge move gradually toward empty-position?
YES or NO
YES >> Check the fuel level sensor unit. Refer to DI-21, "Electrical Component Inspection".
NO >> Check fuel level sensor unit installation, and determine whether the float arm interferes or binds
with any of the internal components in the fuel tank.
Electrical Component InspectionINFOID:0000000003533498
FUEL LEVEL SENSOR UNIT CHECK
For removal, refer to FL-5, "Removal and Installation".
Check Fuel Level Sensor Unit and Fuel Pump
Check resistance between fuel level sensor unit and fuel pump con-
nector terminals 2 and 5.
*1 and *2: When float rod is in contact with stopper.
OIL PRESSURE SWITCH CHECK
Check continuity between the oil pressure switch and body ground.
Removal and Installation of Combination MeterINFOID:0000000003533499
Refer to "Removal and Installation of Combination Meter" for removal and installation procedures.
Terminals Float position mm (in)Resistance
value Ω
(Approx.)
25*1 Empty 25.86 (1.02) 81.66
*2 Full 254.6 (10.02) 6.98
LKIA0402E
ConditionOil pressure
kPa (kg/cm2, psi)Continuity
Engine stopped Less than 29 (0.3, 4) Yes
Engine running More than 29 (0.3, 4) No
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