2004 INFINITI QX56 sensor

DI-2Revision: August 20072004 QX56 CAN Communication System Description .............. 45
Wiring Diagram — CHIME — ................................. 46
Terminals and Reference Value for BCM ................ 48
Terminals and Reference Value for Combination
Meter ...................................................................... 49
How to Proceed With Trouble Diagnosis ................ 49
Preliminary Check .................................................. 49
INSPECTION FOR POWER SUPPLY AND
GROUND CIRCUIT ............................................. 49
CONSULT-II Function (BCM) .................................. 51
CONSULT-II BASIC OPERATION PROCEDURE
... 51
DATA MONITOR .................................................. 52
ACTIVE TEST ..................................................... 52
SELF-DIAGNOSTIC RESULTS ........................... 52
All Warning Chimes Do Not Operate ...................... 53
Key Warning Chime and Light Warning Chime Do
Not Operate (Seat Belt Warning Chime Does Oper-
ate) ......................................................................... 53
Key Warning Chime Does Not Operate .................. 54
Light Warning Chime Does Not Operate ................ 56
Seat Belt Warning Chime Does Not Operate ......... 57
REAR SONAR SYSTEM ........................................... 59
Component Parts and Harness Connector Location ... 59
System Description ................................................. 60
FUNCTION .......................................................... 60
REAR SONAR SYSTEM OFF SWITCH .............. 60
SONAR BUZZER ................................................ 60
REAR SONAR SENSOR ..................................... 61
Wiring Diagram — SONAR — ................................ 62
Terminals And Reference Value For Sonar Control
Unit ......................................................................... 64
How to Proceed With Trouble Diagnosis ................ 64
Pre-diagnosis Inspection ........................................ 65
SENSOR STATUS CHECK ................................. 65
Self-diagnosis Function .......................................... 65
ENTERING DIAGNOSTICS MODE .................... 65
REQUESTING NUMBER OF FAULT CODES
MODE .................................................................. 65
REQUESTING FAULT CODES MODE ............... 66
IDLING OR CLEARING FAULT CODES MODE ... 66
Preliminary Check .................................................. 67INSPECTION FOR POWER SUPPLY AND
GROUND CIRCUIT .............................................67
Symptom Chart .......................................................68
Component Inspection ............................................69
SONAR BUZZER .................................................69
REAR SONAR SYSTEM OFF SWITCH ..............69
REAR SONAR SYSTEM OFF INDICATOR .........69
Removal and Installation of Rear Sonar System ....69
REAR SONAR SENSORS ...................................69
SONAR CONTROL UNIT ....................................69
CLOCK ......................................................................70
Wiring Diagram — CLOCK — .................................70
Removal and Installation of Clock ...........................71
REMOVAL ............................................................71
INSTALLATION ....................................................71
REAR VIEW MONITOR .............................................72
System Description .................................................72
POWER SUPPLY AND GROUND .......................72
AV COMMUNICATION LINE ...............................72
REAR VIEW CAMERA OPERATION ..................72
Component Parts and Harness Connector Location ...73
Schematic ...............................................................74
Wiring Diagram — R/VIEW — ................................75
Terminals and Reference Value for Rear View Cam-
era Control Unit .......................................................78
CONSULT-II Function (REARVIEW CAMERA) ......79
CONSULT-II BASIC OPERATION .......................79
WORK SUPPORT ...............................................80
DATA MONITOR ..................................................80
Side Distance Guideline Correction ........................81
SIDE DISTANCE GUIDELINE CORRECTION
PROCEDURE ......................................................81
Power Supply and Ground Circuit Inspection .........83
Rear View Is Not Displayed With The A/T Selector
Lever In R Position ..................................................84
Removal and Installation of Rear View Camera Con-
trol Unit ....................................................................88
REMOVAL ............................................................88
INSTALLATION ....................................................88
Removal and Installation of Rear View Camera .....88
REMOVAL ............................................................88
INSTALLATION ....................................................88

DI-6
COMBINATION METERS
Revision: August 20072004 QX56
POWER SUPPLY AND GROUND CIRCUIT
Power is supplied at all times

through 10A fuse [No.19, located in the fuse block (J/B)]

to combination meter terminal 8.
With the ignition switch in the ON or START position, power is supplied

through 10A fuse [No.14, located in the fuse block (J/B)]

to combination meter terminal 24.
With the ignition switch in the ACC or ON position, power is supplied

through 10A fuse [No.4, located in the fuse block (J/B)]

to combination meter terminal 1.
Ground is supplied

to combination meter terminal 17

through body grounds M57, M61 and M79.
WATER TEMPERATURE GAUGE
The water temperature gauge indicates the engine coolant temperature.
ECM provides an engine coolant temperature signal to combination meter via CAN communication lines.
ENGINE OIL PRESSURE GAUGE
The engine oil pressure gauge indicates the engine oil pressure.
The engine oil pressure gauge is regulated by the unified meter control unit and input from the oil pressure
sensor.
A/T OIL TEMPERATURE GAUGE
The A/T oil temperature gauge indicates the A/T fluid temperature.
TCM (transmission control module) provides an A/T fluid temperature signal to combination meter via CAN
communication lines.
V O LTA G E G A U G E
The voltage gauge indicates the battery/charging system voltage.
The voltage gauge is regulated by the unified meter control unit.
TACHOMETER
The tachometer indicates engine speed in revolutions per minute (rpm).
ECM provides an engine speed signal to combination meter via CAN communication lines.
FUEL GAUGE
The fuel gauge indicates the approximate fuel level in the fuel tank.
The fuel gauge is regulated by the unified meter control unit and a variable resistor signal supplied

to combination meter terminal 15.

through fuel level sensor unit and fuel pump terminal 2

through fuel level sensor unit and fuel pump terminal 5

from combination meter terminal 16
SPEEDOMETER
ABS actuator and electric unit (control unit) provides a vehicle speed signal to the combination meter via CAN
communication lines.
CAN COMMUNICATION SYSTEM DESCRIPTION
Refer to LAN-5, "CAN COMMUNICATION" .

DI-12
COMBINATION METERS
Revision: August 20072004 QX56
Terminals and Reference Value for Combination MeterEKS007DQ
Te r m i n a l
No.Wire
colorItemCondition
Reference value (V)
(Approx.) Ignition
switchOperation or condition
1OIgnition switch ACC or
ONACC — Battery voltage
8 Y/R Battery power supply OFF — Battery voltage
11 W C A N - H — — —
12 R CAN-L — — —
15 Y/L Fuel level sensor signal — —Refer to DI-22, "
Fuel Level Sensor
Unit Inspection" .
16 B/PFuel level sensor and oil
pressure sensor groundON — 0V
17 B Ground OFF — 0V
18 BR Illumination control switch — Lighting switch ONRefer to LT-153, "
ILLUMINATION
OPERATION BY LIGHTING
SWITCH" .
20 YOil pressure sensor sig-
nalON — 0 - 5V
22 GR/LOil pressure sensor refer-
ence voltageON — 5V
24 O/LIgnition switch ON or
STARTON — Battery voltage

COMBINATION METERS
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Revision: August 20072004 QX56
Symptom ChartEKS007DV
Vehicle Speed Signal InspectionEKS007DW
1. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAGNOSIS
Refer to BRC-29, "
SELF-DIAGNOSIS" .
OK or NG
OK >> Replace the combination meter. Refer to IP-13, "Combination Meter" .
NG >> Perform the "Diagnostic Procedure" for displayed DTC. Refer to BRC-11, "
TROUBLE DIAGNO-
SIS" .
Engine Oil Pressure Signal Inspection EKS0086D
1. CHECK OIL PRESSURE SENSOR SIGNAL
1. Turn ignition switch ON.
2. Check voltage between combination meter harness connector
M24 terminal 20 (Y) and ground.
OK or NG
OK >> GO TO 2.
NG >> GO TO 3.
Trouble phenomenon Possible cause
Improper tachometer indication. Refer to DI-21, "
Engine Speed Signal Inspection" .
Improper water temperature gauge indication. Refer to DI-21, "
Water Temperature Signal Inspection" .
Improper speedometer or odometer. Refer to DI-19, "
Vehicle Speed Signal Inspection" .
Improper fuel gauge indication.
Refer to DI-22, "
Fuel Level Sensor Unit Inspection" .
Fuel warning lamp indication is irregular.
Improper A/T oil temperature gauge indicationRefer to AT-131, "
DTC P1710 A/T FLUID TEMPERATURE SEN-
SOR CIRCUIT" .
Improper voltage gauge indication
Replace combination meter. Refer to IP-13, "
Combination Meter"
.
More than one gauge does not give proper indication.
Improper A/T position indication. Refer to DI-41, "
A/T INDICATOR" .
Illumination control does not operate properly. Refer to LT-152, "
ILLUMINATION" .
Te r m i n a l s
Condition Voltage (V) (+)
(–)
ConnectorTe r m i n a l
(Wire color)
M24 20 (Y) GroundWhen ignition switch is in ON
position. (Engine stopped)Ye s
Engine running. (Idle speed) Yes
WKIA1833E

DI-20
COMBINATION METERS
Revision: August 20072004 QX56
2. CHECK OIL PRESSURE SENSOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect combination meter connector M24 and oil pressure
sensor connector F4.
3. Check continuity between combination meter harness connector
M24 terminal 16 (B/P) and oil pressure sensor harness connec-
tor F4 terminal 3 (B/P).
OK or NG
OK >> Replace the combination meter. Refer to IP-13, "Combi-
nation Meter" .
NG >> Repair harness or connector.
3. CHECK OIL PRESSURE SENSOR REFERENCE VOLTAGE
1. Turn ignition switch OFF.
2. Disconnect oil pressure sensor connector F4.
3. Turn ignition switch ON.
4. Check voltage between combination meter harness connector
M24 terminal 22 (GR/L) and ground.
OK or NG
OK >> GO TO 4.
NG >> Replace the combination meter. Refer to IP-13, "
Combi-
nation Meter" .
4. CHECK OIL PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect combination meter connector M24.
3. Check continuity between combination meter harness connector M24 terminal 22 (GR/L) and oil pressure
sensor harness connector F4 terminal 1 (GR/L).
4. Check continuity between combination meter harness connector
M24 terminal 22 (GR/L) and ground.
OK or NG
OK >> GO TO 5.
NG >> Repair harness or connector.Continuity should exist.
WKIA1837E
Voltage : Approx. 5V
WKIA1834E
Continuity should exist.
Continuity should not exist.
WKIA1835E

COMBINATION METERS
DI-21
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Revision: August 20072004 QX56
5. CHECK OIL PRESSURE SENSOR SIGNAL CIRCUIT
1. Check continuity between combination meter harness connector M24 terminal 20 (Y) and oil pressure
sensor harness connector F4 terminal 2 (Y).
2. Check continuity between combination meter harness connector
M24 terminal 20 (Y) and ground.
OK or NG
OK >> GO TO 6.
NG >> Repair harness or connector.
6. CHECK OIL PRESSURE SENSOR GROUND CIRCUIT
Check continuity between combination meter harness connector
M24 terminal 16 (B/P) and ground.
OK or NG
OK >> Replace oil pressure sensor.
NG >> Repair harness or connector.
Water Temperature Signal Inspection EKS007DX
1. CHECK ECM SELF-DIAGNOSIS
Perform ECM self-diagnosis. Refer to EC-107, "
SELF-DIAG RESULTS MODE" .
OK or NG
OK >> Replace the combination meter. Refer to IP-13, "Combination Meter" .
NG >> Perform "Diagnostic procedure" for displayed DTC. Refer to EC-71, "
TROUBLE DIAGNOSIS" .
Engine Speed Signal Inspection EKS007DY
1. CHECK ECM SELF-DIAGNOSIS
Perform ECM self-diagnosis. Refer to EC-107, "
SELF-DIAG RESULTS MODE" .
OK or NG
OK >> Replace the combination meter. Refer to IP-13, "Combination Meter" .
NG >> Perform "Diagnostic procedure" for displayed DTC. Refer to EC-71, "
TROUBLE DIAGNOSIS" . Continuity should exist.
Continuity should not exist.
WKIA1836E
Continuity should not exist.
WKIA2685E

DI-22
COMBINATION METERS
Revision: August 20072004 QX56
Fuel Level Sensor Unit InspectionEKS007DZ
FUEL LEVEL SENSOR UNIT
The following symptoms do not indicate a malfunction.

Depending on vehicle position or driving circumstance, the fuel in the tank shifts and the indication may
fluctuate.

If the vehicle is fueled with the ignition switch ON, the indication will update slowly.

If the vehicle is tilted when the ignition switch is turned ON, fuel in the tank may flow to one direction
resulting in a change of reading.
LOW-FUEL WARNING LAMP
Depending on vehicle posture or driving circumstances, the fuel level in the tank varies, and the warning lamp
ON timing may be changed.
1. CHECK SELF-DIAGNOSIS
Perform the combination meter self-diagnosis. Refer to DI-13, "
SELF-DIAGNOSIS FUNCTION" .
OK or NG
OK >> GO TO 2.
NG >> Replace the combination meter. Refer to IP-13, "
Combination Meter" .
2. CHECK HARNESS CONNECTOR
1. Turn the ignition switch OFF.
2. Check combination meter and fuel level sensor unit and fuel pump terminals (meter-side, and harness-
side) for poor connection.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace terminals or connectors.
3. CHECK HARNESS CONNECTOR OUTPUT SIGNAL
1. Disconnect fuel level sensor unit and fuel pump connector.
2. Turn ignition switch ON.
3. Check voltage between combination meter harness connector
M24 terminal 15 (Y/L) and ground.
OK or NG
OK >> GO TO 4.
NG >> Replace the combination meter. Refer to IP-13, "
Combi-
nation Meter" . Battery voltageWKIA1816E

COMBINATION METERS
DI-23
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Revision: August 20072004 QX56
4. CHECK HARNESS FOR OPEN OR SHORT CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect combination meter connector M24.
3. Check continuity between combination meter harness connector
M24 terminal 15 (Y/L) and fuel level sensor unit and fuel pump
harness connector C5 terminal 2 (Y/L).
4. Check continuity between fuel level sensor unit and fuel pump
harness connector C5 terminal 2 (Y/L) and ground.
OK or NG
OK >> GO TO 5.
NG >> Repair harness or connector.
5. CHECK FUEL LEVEL SENSOR CIRCUIT
1. Check continuity between combination meter harness connector
M24 terminal 16 (B/P) and fuel level sensor unit and fuel pump
harness connector C5 terminal 5 (B/P).
2. Check continuity between fuel level sensor unit and fuel pump
harness connector C5 terminal 5 (B/P) and ground.
OK or NG
OK >> GO TO 6.
NG >> Repair harness or connector.
6. CHECK FUEL LEVEL SENSOR UNIT
Check the fuel level sensor unit. Refer to DI-25, "
FUEL LEVEL SENSOR UNIT CHECK" .
OK or NG
OK >> GO TO 7.
NG >> Replace the fuel level sensor unit. Refer to FL-5, "
Removal and Installation" .
7. CHECK INSTALLATION CONDITION
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.
OK or NG
OK >> Replace the combination meter. Refer to IP-13, "Combination Meter" .
NG >> Install the fuel level sensor unit properly.Continuity should exist.
Continuity should not exist.
WKIA2070E
Continuity should exist.
Continuity should not exist.
WKIA2071E