2004 INFINITI FX35 ground

COMBINATION METERS
DI-21
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Revision: 2004 November 2004 FX35/FX45
4. CHECK FUEL LEVEL SENSOR (MAIN·SUB) CIRCUIT
1. Disconnect fuel level sensor unit and fuel pump (main) connector.
2. Check continuity between fuel level sensor unit (sub) harness
connector B40 terminal 2 (Y) and fuel level sensor unit and fuel
pump (main) harness connector B39 terminal 2 (Y).
3. Check continuity between fuel level sensor unit (sub) harness
connector B40 terminal 2 (Y) and ground.
OK or NG
OK >> GO TO 5.
NG >> Repair harness or connector.
5. CHECK FUEL LEVEL SENSOR (MAIN) CIRCUIT
1. Check continuity between fuel level sensor unit and fuel pump
(main) harness connector B39 terminal 5 (B) and unified meter
and A/C amp. harness connector M56 terminal 36 (B/W).
2. Check continuity between fuel level sensor unit and fuel pump
(main) harness connector B39 terminal 5 (B) and ground.
OK or NG
OK >> GO TO 6.
NG >> Repair harness or connector.
6. CHECK INSTALLATION CONDITION
Check fuel level sensor unit installation, and check whether the float arm interferes or binds with any of the
internal components in the fuel tank.
OK or NG
OK >> Replace unified meter and A/C amp. Refer to DI-34, "Removal and Installation of Unified Meter
and A/C Amp." .
NG >> Install the fuel level sensor unit properly.
Fuel Level Sensor Signal Inspection 2AKS005MZ
The following symptoms do not indicate a malfunction.
LOW-FUEL WARNING LAMP
Depending on vehicle position or driving circumstance, the fuel in the tank flows and the warning lamp ON tim-
ing may change.
1. CHECK FUEL GAUGE
Check if fuel gauge is normally operating.
YES >> Replace combination meter.
NO >> Go to DI-20, "
Fuel Level Sensor Signal Inspection 1" . Continuity should exist.
Continuity should not exist.
SKIA5204E
Continuity should exist.
Continuity should not exist.
SKIA5205E

DI-22
COMBINATION METERS
Revision: 2004 November 2004 FX35/FX45
CAN Communication System InspectionAKS005N0
1. CHECK CAN COMMUNICATION
1. Select “SELF-DIAG RESULTS” mode for “METER A/C AMP” with CONSULT-II.
2. Print out CONSULT-II screen.
>> Go to “CAN system”. Refer to LAN-4, "
Precautions When Using CONSULT-II" .
Communication Line InspectionAKS005N1
1. CHECK CONNECTOR
Check combination meter, unified meter and A/C amp. and terminals (combination meter-side, unified meter
and A/C amp. side, and harness side) for looseness or bent terminals.
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.
2. CHECK METER/GAUGES VISUALLY
Does the pointer on the meter/gauge fluctuate at the engine start?
Is the fluctuation acceptable?
YES >> GO TO 3.
NO >> GO TO 6.
3. CHECK CONTINUITY COMMUNICATION CIRCUIT (TX: COMBINATION METER)
1. Turn ignition switch OFF.
2. Disconnect the combination meter connector and unified meter and A/C amp. connector.
3. Check continuity between combination meter harness connector
M20 terminal 13 (L/B) and unified meter and A/C amp. harness
connector M55 terminal 19 (L/B).
4. Check continuity between combination meter harness connector
M20 terminal 13 (L/B) and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair harness or connector.
4. CHECK VOLTAGE OF UNIFIED METER AND A/C AMP.
1. Connect unified meter and A/C amp. connector.
2. Turn ignition switch ON.
3. Check voltage between combination meter harness connector
M20 terminal 13 (L/B) and ground.
OK or NG
OK >> GO TO 5.
NG >> Replace unified meter and A/C amp. Refer to DI-34,
"Removal and Installation of Unified Meter and A/C
Amp." . Continuity should exist.
Continuity should not exist.
SKIA4837E
Approx. 5V
SKIA4886E

COMBINATION METERS
DI-23
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Revision: 2004 November 2004 FX35/FX45
5. CHECK VOLTAGE SIGNAL OF COMBINATION METER
1. Turn ignition switch OFF and connect combination meter connector.
2. Turn ignition switch ON.
3. Check voltage signal between combination meter harness con-
nector M20 terminal 13 (L/B) and ground with simple oscillo-
scope of CONSULT-II.
OK or NG
OK >> Replace unified meter and A/C amp. Refer to DI-34, "Removal and Installation of Unified Meter
and A/C Amp." .
NG >> Replace combination meter.
6. CHECK CONTINUITY COMMUNICATION CIRCUIT (RX: COMBINATION METER)
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
M20 terminal 14 (PU) and unified meter and A/C amp. harness
connector M55 terminal 9 (PU).
4. Check continuity between combination meter harness connector
M20 terminal 14 (PU) and ground.
OK or NG
OK >> GO TO 7.
NG >> Repair harness or connector.
7. CHECK VOLTAGE OF COMBINATION METER
1. Connect combination meter connector.
2. Turn ignition switch ON.
3. Check voltage between unified meter and A/C amp. harness
connector M55 terminal 9 (PU) and ground.
OK or NG
OK >> GO TO 8.
NG >> Replace combination meter.13 (L/B) - Ground:
SKIA9258ESKIA3361E
Continuity should exist.
Continuity should not exist.
SKIA4836E
Approx. 5V
SKIA9259E

DI-24
COMBINATION METERS
Revision: 2004 November 2004 FX35/FX45
8. CHECK VOLTAGE SIGNAL OF UNIFIED METER AND A/C AMP.
1. Turn ignition switch OFF and connect unified meter and A/C amp. connector.
2. Turn ignition switch ON.
3. Check voltage signal between combination meter harness con-
nector M20 terminal 14 (PU) and ground with simple oscillo-
scope of CONSULT-II.
OK or NG
OK >> Replace combination meter.
NG >> Replace unified meter and A/C amp. Refer to DI-34, "
Removal and Installation of Unified Meter
and A/C Amp." .
Odo/Trip Meter and Illumination Control Switch InspectionAKS005N2
1. CHECK ODO/TRIP METER AND ILLUMINATION CONTROL SWITCH
1. Remove odo/trip meter and illumination control switch. Refer to DI-27, "
Removal and Installation of Odo/
Trip Meter and Illumination Control Switch" .
2. Check continuity between odo/trip meter and illumination control
switch harness connector terminals 25, 26, 35 or 36 and 27.
OK or NG
OK >> Replace combination meter.
NG >> Replace odo/trip meter and illumination control switch.
Fuel Gauge Pointer Fluctuates, Indicator Wrong Value or VariesAKS005N3
1. CHECK FUEL GAUGE FLUCTUATION
Test drive vehicle to see if gauge fluctuates only during driving or before or after stopping.
Does the indication value vary only during driving or before or after stopping?
YES >> The pointer fluctuation may be caused by fuel level change in the fuel tank. Condition is normal.
NO >> Ask the customer about the situation when the symptom occurs in detail, and perform the trouble
diagnosis. 14 (PU) - Ground:
SKIA9260ESKIA3362E
Terminal Condition Continuity
26
27Illumination control switch (+) is pushed. Yes
Illumination control switch (+) is released. No
25Illumination control switch (–) is pushed. Yes
Illumination control switch (–) is released. No
36Trip transfer switch is pushed. Yes
Trip transfer switch is released. No
35Trip reset switch is pushed. Yes
Trip reset switch is released. No
SKIA4846E

COMBINATION METERS
DI-25
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Revision: 2004 November 2004 FX35/FX45
Fuel Gauge Does Not Move to FULL positionAKS005N4
1. QUESTION 1
Does it take a long time for the pointer to move to FULL position?
YES >> GO TO 2.
NO >> GO TO 3.
2. QUESTION 2
Was the vehicle fueled with the ignition switch ON?
YES >> Be sure to fuel the vehicle with the ignition switch OFF. Otherwise, it will take a long time to move
to FULL position because of the characteristic of the fuel gauge.
NO >> GO TO 3.
3. QUESTION 3
Is the vehicle parked on an incline?
YES >> Check the fuel level indication with vehicle on a level surface.
NO >> GO TO 4.
4. QUESTION 4
During driving, does the fuel gauge pointer move gradually toward EMPTY position?
YES >> Check the fuel level sensor unit. Refer to DI-25, "CHECK FUEL LEVEL SENSOR UNIT" .
NO >> The float arm may interfere or bind with any of the components in the fuel tank.
Electrical Components InspectionAKS005N5
CHECK FUEL LEVEL SENSOR UNIT
For removal, refer to FL-4, "FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY" .
Check Fuel Level Sensor Unit and Fuel Pump (Main)
1. Check the resistance between terminals 2 and 5.
*1 and *2: When float rod is in contact with stopper.
2. If the results of check is NG, check the fuel level sensor unit and
fuel pump (main) harness.
Check Fuel Level Sensor Unit and Pump (Main) Harness
1. Check continuity at following terminals.
2. If the results of check is NG, replace fuel pump assembly. If the
results of check is OK, replace fuel level sensor unit.
Terminal
Float position mm (in)Resistance
value Ω
(+) (−)
25*1 Empty 29 (1.14) Approx. 80
*2 Full 236 (9.29) Approx. 3
PKIA1936E
Terminal Continuity
2 - Signal terminal
Ye s
5 - Ground terminal
SKIA3582E

WARNING LAMPS
DI-49
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Revision: 2004 November 2004 FX35/FX45
5. CHECK OIL PRESSURE SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect the IPDM E/R connector and the oil pressure switch connector.
3. Check continuity between IPDM E/R harness connector E9 ter-
minal 57 (BR) and oil pressure switch harness connector F1 ter-
minal 1 (BR).
OK or NG
OK >> GO TO 6.
NG >> Repair harness or connector.
6. CHECK OIL PRESSURE SWITCH
Check oil pressure switch. Refer to DI-50, "
OIL PRESSURE SWITCH" .
OK or NG
OK >> Replace IPDM E/R. Refer to PG-30, "Removal and Installation of IPDM E/R" .
NG >> Replace oil pressure switch.
Oil Pressure Warning Lamp Does Not Turn Off (Oil Pressure Is Normal)AKS005NG
NOTE:
For oil pressure inspection, refer to LU-8, "
OIL PRESSURE CHECK" .
1. CHECK IPDM E/R OUTPUT SIGNAL
1. Disconnect the oil pressure switch connector.
2. Turn ignition switch ON.
3. Check voltage between oil pressure switch harness connector
F1 terminal 1 (BR) and ground.
OK or NG
OK >> GO TO 2.
NG >> GO TO 3.
2. CHECK OIL PRESSURE SWITCH
1. Turn ignition switch OFF.
2. Check oil pressure switch. Refer to DI-50, "
OIL PRESSURE SWITCH" .
OK or NG
OK >> Replace IPDM E/R.
NG >> Replace oil pressure switch.Continuity should exist.
SKIA5011E
Approx. 12V
SKIA5012E

DI-50
WARNING LAMPS
Revision: 2004 November 2004 FX35/FX45
3. CHECK OIL PRESSURE SWITCH CIRCUIT
1. Disconnect the IPDM E/R connector.
2. Check continuity between IPDM E/R harness connector E9 ter-
minal 57 (BR) and ground.
OK or NG
OK >> Replace IPDM E/R.
NG >> Repair harness or connector.
Component InspectionAKS005NH
OIL PRESSURE SWITCH
Check continuity between oil pressure switch and ground.Continuity should not exist.
SKIA5013E
Condition
Oil pressure kPa (kg/cm2 , psi)Continuity
Engine stopped Less than 29 (0.3, 4) Yes
Engine running More than 29 (0.3, 4) No
ELF0044D

DI-56
WARNING CHIME
Revision: 2004 November 2004 FX35/FX45

through 15A fuse [No. 1, located in the fuse block (J/B)]

to BCM terminal 38, and

through 10A fuse [No. 12, located in the fuse block (J/B)]

to unified meter and A/C amp. terminal 22

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

to combination meter terminal 7.
Ground is supplied

to BCM terminals 49 and 52, and

to unified meter and A/C amp. terminals 29 and 30, and

to combination meter terminals 5, 6 and 15

through body grounds M35, M45 and M85.
NOTE:
When ignition key warning chime, light warning chime, and seat belt warning chime should be performed at
the same time, the priorities for each chime are the following.
1. Seat belt warning chime
2. Light warning chime
3. Ignition key warning chime
IGNITION KEY WARNING CHIME (WITHOUT INTELLIGENT KEY)
With the key inserted into the ignition switch, and the ignition switch OFF or ACC, when driver's door open, the
warning chime will sound.
Power is supplied

through key switch terminal 1

to BCM terminal 37.
Ground is supplied

to BCM terminal 62

through front door switch (driver side) terminal 1.
Front door switch (driver side) is case grounded.
BCM detects key inserted into the ignition switch, and sends key warning signal to unified meter and A/C amp.
with CAN communication line. Unified meter and A/C amp. sends key warning signal to combination meter
with communication line between unified meter and A/C amp. and combination meter.
When combination meter receives key warning signal, it sounds warning chime.
IGNITION KEY WARNING CHIME (WITH INTELLIGENT KEY)
When Mechanical Key Is Used
With the key inserted into the ignition switch, and the ignition switch LOCK or ACC, when driver's door open,
the warning chime will sound.
Power is supplied

through key switch and ignition knob switch terminal 4

to BCM terminal 37.
Ground is supplied

to BCM terminal 62

through front door switch (driver side) terminal 1.
Front door switch (driver side) is case grounded.
BCM detects key inserted into the ignition switch, and sends key warning signal to unified meter and A/C amp.
with CAN communication line. Unified meter and A/C amp. sends key warning signal to combination meter
with communication line between unified meter and A/C amp. and combination meter.
When combination meter receives key warning signal, it sounds warning chime.
When Intelligent Key Is Carried With The Driver
With the ignition knob is in LOCK (push switch ON) or ACC, when driver's door open, the warning chime will
sound.
Power is supplied

through key switch and ignition knob switch terminal 2