2004 INFINITI QX56 Air

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.
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Continuity should exist.
Continuity should not exist.
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DI-26
COMPASS AND THERMOMETER
Revision: August 20072004 QX56
COMPASS AND THERMOMETERPFP:24835
System DescriptionEKS007E4
This unit displays the following items:

Earth magnetism and heading direction of vehicle.

Outside air temperature.

Caution for frozen road surfaces.
OUTSIDE TEMPERATURE DISPLAY
Push the mode switch when the ignition switch is in the ON position. The outside temperature will be displayed
in “°F”.

Selecting the indication range
Push the mode switch to change from °F → °C → OFF → °F.

The indicated temperature on the thermometer is not readily affected by engine heat. It changes only
when one of the following conditions is present.
–The temperature detected by the ambient sensor is lower than the indicated temperature on the thermom-
eter.
–The vehicle speed is greater than 20 km/h (13 MPH).
(This is to prevent the indicated temperature from being affected by engine heat during low-speed driv-
ing.)
–The ignition switch has been turned to the OFF position for more than 2 hours. (The engine is cold.)
DIRECTION DISPLAY
Push the mode switch when the ignition switch is in the ON position. The direction will be displayed.
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DI-28
COMPASS AND THERMOMETER
Revision: August 20072004 QX56
Trouble DiagnosesEKS007E6
PRELIMINARY CHECK FOR THERMOMETER
1. COOL DOWN CHECK
1. Turn the ignition switch to the ON position.
2. Cool down the ambient sensor with water or ice.
Does the indicated temperature drop?
Yes >> GO TO 2.
No >> The system is malfunctioning. Refer to DI-28, "
INSPECTION/COMPASS AND THERMOMETER"
.
2. WARM UP CHECK
1. Leave the vehicle for 10 minutes.
2. With the ignition switch in the ON position, disconnect and reconnect the ambient sensor connector.
Does the indicated temperature rise?
Yes >> The system is OK.
No >> The system is malfunctioning. Refer to DI-28, "
INSPECTION/COMPASS AND THERMOMETER"
.
NOTE:

The indicated temperature on the thermometer is not readily affected by engine heat. It changes only
when one of the following conditions is present.
–The temperature detected by the ambient sensor is lower than the indicated temperature on the thermom-
eter.
–The vehicle speed is greater than 20 km/h (13 MPH).
(This is to prevent the indicated temperature from being affected by engine heat during low-speed driv-
ing.)
–The ignition switch has been turned to the OFF position for more than 2 hours. (The engine is cold.)
INSPECTION/COMPASS AND THERMOMETER
Symptom Possible causes Repair order
No display at all 1. 10A fuse
2. Ground circuit
3. Compass and thermometer1. Check 10A fuse [No. 12, located in fuse block (J/B)].
Turn the ignition switch ON and verify that battery positive volt-
age is at terminal 2 of compass and thermometer.
2. Check ground circuit for compass and thermometer.
3. Replace compass and thermometer.
Forward direction indi-
cation slips off the mark
or incorrect.1. In manual correction mode (Bar and
display vanish.)
2. Zone variation change is not done.1. Drive the vehicle and turn at an angle of 90°.
2. Perform the zone variation change.
Compass reading
remains unchanged.1. Vehicle speed signal is not entered.
2. Compass and thermometer1. Check harness for open or short between combination meter
terminal 29 and compass and thermometer terminal 8.
2. Replace compass and thermometer.
Displays wrong tem-
perature when ambient
temperature is between
−40°C (−40°F) and
55°C (130°F). (See
NOTE above.)1. Check operation
2. Ambient sensor circuit
3. Vehicle speed signal is not entered.
4. Ambient sensor
5. Compass and thermometer1. Perform preliminary check shown above.
2. Check harness for open or short between ambient sensor and
compass and thermometer.
3. Check harness for open or short between combination meter
terminal 29 and compass and thermometer terminal 8.
4. Replace ambient sensor.
5. Replace compass and thermometer.
Displays SC or OC. 1. Ambient sensor circuit.
2. Ambient sensor.
3. Compass and thermometer.1. Check harness for open or short between ambient sensor and
compass and thermometer.
2. Replace ambient sensor.
3. Replace compass and thermometer.

DI-38
WARNING LAMPS
Revision: August 20072004 QX56
Oil Pressure Warning Lamp Stays Off (Ignition Switch ON)EKS007EA
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.
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" .
Terminals
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
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Continuity should exist.
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Voltage : Approx. 5V
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WARNING LAMPS
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Revision: August 20072004 QX56
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.
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.Continuity should exist.
Continuity should not exist.
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Continuity should exist.
Continuity should not exist.
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Continuity should not exist.
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WARNING CHIME
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Revision: August 20072004 QX56
Terminals and Reference Value for Combination MeterEKS007EJ
How to Proceed With Trouble DiagnosisEKS007EK
1. Confirm the symptom or customer complaint.
2. Understand operation description and function description. Refer to DI-44, "
System Description" .
3. Perform the preliminary check. Refer to DI-49, "
Preliminary Check" .
4. Check symptom and repair or replace the cause of malfunction.
5. Does the warning chime operate properly? If so, go to 6. If not, go to 3.
6. Inspection End.
Preliminary CheckEKS007EL
INSPECTION FOR POWER SUPPLY AND GROUND CIRCUIT
1. CHECK FUSE AND FUSIBLE LINK
Check for blown BCM fuse or fusible link.
Refer to DI-46, "Wiring Diagram — CHIME —" .
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to PG-
4, "POWER SUPPLY ROUTING CIRCUIT" .
35 O/B Combination switch output 2
ON

Light switch and wiper switch
OFF

Wiper dial position 4 36 R/W Combination switch output 1
37 B/R Key switch signal OFFKey is removed 0
Key is inserted Battery voltage
38 W/L Ignition switch ON or START ON — Battery voltage
39 W CAN-H — — —
40 R CAN-L — — —
47 SB Front door switch LH signal OFFON (open) 0
OFF (closed) 5
67 B Ground OFF — 0
70 W/B Battery power supply OFF — Battery voltage Te r m i n a l
No.Wire
colorItem Condition
Reference value (V)
(Approx.) Ignition
switchMeasurement method
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Te r m i n a l
No.Wire
colorItem Condition
Reference value (V)
(Approx.) Ignition
switchMeasurement method
11 W C A N - H — — —
12 R CAN-L — — —
27 O/B Seat belt buckle switch LH ONUnfastened (ON) 0
Fastened (OFF) Battery voltage
Unit Power source Fuse or fusible link No.
BCMBatteryf
Ignition switch ON or START 59

DI-50
WARNING CHIME
Revision: August 20072004 QX56
2. CHECK POWER SUPPLY CIRCUIT
1. Disconnect BCM connector.
2. Check voltage between BCM harness connector terminals and
ground.
OK or NG
OK >> GO TO 3.
NG >> Check harness for open between BCM and fuse.
3. CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between BCM harness connector M20 terminal
67 (B) and ground.
OK or NG
OK >> Inspection End.
NG >> Repair harness or connector.
Terminals Ignition switch position
(+)
(–) OFF ON
ConnectorTerminal (Wire
color)
M20 70 (W/B)
GroundBattery volt-
ageBattery volt-
age
M18 38 (W/L) 0VBattery volt-
age
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Continuity should exist.
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DI-54
WARNING CHIME
Revision: August 20072004 QX56
2. CHECK FRONT DOOR SWITCH LH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector and front door switch LH connector.
3. Check continuity between BCM harness connector M19 terminal
47 (SB) and front door switch LH harness connector B8 terminal
2 (SB).
4. Check continuity between BCM harness connector M19 terminal
47 (SB) and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3. CHECK FRONT DOOR SWITCH LH
Check continuity between front door switch LH terminal 2 and
exposed metal of switch while pressing and releasing switch.
OK or NG
OK >> Replace the BCM. Refer to BCS-19, "Removal and
Installation of BCM" .
NG >> Replace the front door switch LH.
Key Warning Chime Does Not OperateEKS007EP
1. CHECK FUSE
Check if the key switch fuse [No. 19, located in the fuse block (J/B)] is blown. Refer to DI-46, "
Wiring Diagram
— CHIME —" .
Is the fuse blown?
YES >> Replace the fuse. Be sure to repair the cause of malfunction before installing new fuse.
NO >> GO TO 2.
2. CHECK WARNING CHIME OPERATION
With key removed from the ignition key cylinder and the front door LH open, turn the lighting switch to 1st or
2nd position.
Does warning chime sound?
YES >> GO TO 3.
NO >> Go to DI-53, "
All Warning Chimes Do Not Operate" or DI-53, "Key Warning Chime and Light
Warning Chime Do Not Operate (Seat Belt Warning Chime Does Operate)" . Continuity should exist.
Continuity should not exist.
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When front door switch
LH is released: Continuity should exist.
When front door switch
LH is pressed: Continuity should not
exist.
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