ground INFINITI QX56 2011 Factory Service Manual

MWI-58
< BASIC INSPECTION >
DIAGNOSIS AND REPAIR WORKFLOW (METER SYSTEM)
 Check the symptom based on the inform ation obtained from the customer.
 Check that any other malfunctions are present.
>> GO TO 3.
3.CHECK ON BOARD DIAGNOSIS OPERATION
Check that the on board diagnosis function operates. Refer to MWI-29, "
On Board Diagnosis Function".
Does the on board diagnosis function operate normally?
YES >> GO TO 4.
NO >> GO TO 6.
4.CHECK CONSULT-III SELF-DIAGNOSIS RESULTS
Connect CONSULT-III and perform self-diagnosis. Refer to MWI-30, "
CONSULT-III Function".
Are self-diagnosis results normal?
YES >> GO TO 5.
NO >> GO TO 8.
5.NARROW DOWN THE MALFUNCTIONING PARTS BY SYMPTOM DIAGNOSIS
Perform symptom diagnosis and narrow down the malfunctioning parts.
>> GO TO 8.
6.CHECK COMBINATION METER POWE R SUPPLY AND GROUND CIRCUITS
Check combination meter power supply and ground circuits. Refer to MWI-64, "
COMBINATION METER :
Diagnosis Procedure".
Is inspection result OK?
YES >> GO TO 7.
NO >> GO TO 8.
7.REPLACE COMBINATION METER
Replace combination meter.
>> GO TO 9.
8.REPAIR OR REPLACE MALFUNCTIONING PARTS
Repair or replace the malfunctioning parts.
NOTE:
If DTC is displayed, erase DTC after repair or replace malfunctioning parts.
>> GO TO 9.
9.FINAL CHECK
Check that the combination meter operates normally.
Do they operate normally?
YES >> INSPECTION END
NO >> GO TO 1.
Revision: 2010 May2011 QX56

MWI-64
< DTC/CIRCUIT DIAGNOSIS >
POWER SUPPLY AND GROUND CIRCUIT
POWER SUPPLY AND GROUND CIRCUIT
COMBINATION METER
COMBINATION METER : Diagnosis ProcedureINFOID:0000000006221743
1.CHECK FUSE
Check for blown fuses.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Be sure to eliminate cause of malfunction before installing new fuse.
2.CHECK POWER SUPPLY CIRCUIT
Check voltage between combination meter harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Check harness between combination meter and fuse.
3.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect combination meter connector.
3. Check continuity between combination meter harness connector and ground.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Repair harness or connector.
Power source Fuse No.
Battery 11
Ignition switch ON or START 3
Te r m i n a l s
Ignition switch po-sition Vol tag e
(Approx.)
(+) (
−)
Combination meter
Ground
Connector Terminal
M34 1OFF
Battery voltage
2ON
Combination meter
GroundContinuity
Connector Terminal
M34 3
Existed
23
Revision: 2010 May2011 QX56

MWI
TRIP RESET AND ILLUMINATION CONTROL SWITCH SIGNAL CIRCUIT
MWI-65
< DTC/CIRCUIT DIAGNOSIS >
C
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TRIP RESET AND ILLUMINATION CO NTROL SWITCH SIGNAL CIRCUIT
Diagnosis ProcedureINFOID:0000000006221744
1.CHECK COMBINATION METER INPUT SIGNAL
1. Turn ignition switch ON.
2. Measure voltage between the following terminals of the combination meter.
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 2.
2.CHECK TRIP RESET AND ILLUMINATION CONTROL SWITCH SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect combination meter connector and trip reset and illumination control switch connector.
3. Check continuity between combination meter harness connector and trip reset and illumination control switch harness connector.
4. Check continuity between combination meter harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair harness or connector.
3.CHECK TRIP RESET AND ILLUMINATI ON CONTROL SWITCH GROUND CIRCUIT
Check continuity between trip reset and i llumination control switch connector and ground.
(+) (−)
Condition Voltag e
(Approx.)
Combination meter
Ground
Connector Terminals
M34 8
When trip reset switch is pressed 0 V
Other than the above 5 V
13 When illumination control switch (+) is pressed 0 V
Other than the above 5 V
14 When illumination control switch (
−) is pressed 0 V
Other than the above 5 V
Te r m i n a l s Continuity
Combination meter Trip reset and illumination control switch
Connector Terminal Connector Terminal
M34 8
M83 5
Existed
13 3
14 4
Combination meter GroundContinuity
Connector Terminal
M34 8
Not existed
13
14
Trip reset and illumination control switch
GroundContinuity
Connector Terminal
M83 6 Existed
Revision: 2010 May2011 QX56

MWI
TRIP COMPUTER SWITCH SIGNAL CIRCUITMWI-67
< DTC/CIRCUIT DIAGNOSIS >
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TRIP COMPUTER SWITCH SIGNAL CIRCUIT
Diagnosis ProcedureINFOID:0000000006221746
1.CHECK COMBINATION METER INPUT SIGNAL
1. Turn ignition switch ON.
2. Measure voltage between the following terminals of the combination meter.
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 2.
2.CHECK TRIP COMPUTER SWITCH SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect combination meter connector and trip computer switch connector.
3. Check continuity between combination meter harnes s connector and trip computer switch harness con-
nector.
4. Check continuity between combination meter harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair harness or connector.
3.CHECK TRIP COMPUTER SWITCH GROUND CIRCUIT
Check continuity between trip computer switch connector and ground.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Repair harness or connector.
(+) ( −)
Condition Voltag e
(Approx.)
Combination meter
Ground
Connector Terminals
M34 11
When enter switch is pressed 0 V
Other than the above 5 V
12 When select switch is pressed 0 V
Other than the above 5 V
Te r m i n a l s
Continuity
Combination meter Trip computer switch
Connector Terminal Connector Terminal
M34 11
M84 3
Existed
12 4
Combination meter GroundContinuity
Connector Terminal
M34 11
Not existed
12
Trip computer switch
GroundContinuity
Connector Terminal
M84 6 Existed
Revision: 2010 May2011 QX56

MWI
FUEL LEVEL SENSOR SIGNAL CIRCUITMWI-69
< DTC/CIRCUIT DIAGNOSIS >
C
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FUEL LEVEL SENSOR SIGNAL CIRCUIT
Component Function CheckINFOID:0000000006221748
1.CHECK COMBINATION METER OUTPUT SIGNAL
Select the “Data Monitor” for the “METER/M&A” and compare the “FUEL ME TER” monitor value with the fuel
gauge reading on the combination meter.
Does monitor value match fuel gauge reading?
YES >> INSPECTION END
NO >> Replace combination meter. Refer to MWI-85, "
Removal and Installation".
Diagnosis ProcedureINFOID:0000000006221749
1.CHECK COMBINATION METER INPUT SIGNAL
1. Turn ignition switch ON.
2. Check voltage between combination meter harness connector and ground.
Does it match fuel gauge reading?
YES >> GO TO 2.
NO >> Replace the combination meter. Refer to MWI-85, "
Removal and Installation".
2.CHECK FUEL LEVEL SENSOR CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect combination meter connector and fuel level sensor unit connector.
3. Check continuity between combination meter harnes s connector and fuel level sensor unit harness con-
nector.
4. Check continuity between combination meter harness connector and ground.
Fuel gauge indication position Reference value of data monitor [L] 1 Approx. 101.8
3/4 Approx. 77.3
1/2 Approx. 52.3
1/4 Approx. 27.3 0Approx. 2.3
Te r m i n a l s
Vo l ta g e
(Approx.)
(+) (
−)
Combination meter
Ground
Connector Terminal
M34 34
JSNIA3013ZZ
Combination meter Fuel level sensor unit Continuity
Connector Terminal Connector Terminal
M34 34 C5 2 Existed
Revision: 2010 May2011 QX56

MWI-70
< DTC/CIRCUIT DIAGNOSIS >
FUEL LEVEL SENSOR SIGNAL CIRCUIT
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair harness or connector.
3.CHECK FUEL LEVEL SENSOR GROUND CIRCUIT
Check continuity between fuel level sensor unit harness connector and combination meter harness connector.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Repair harness or connector.
Component InspectionINFOID:0000000006221750
1.REMOVE FUEL LEVEL SENSOR UNIT
Remove the fuel level sensor unit. Refer to FL-5, "
Removal and Installation".
>> GO TO 2.
2.CHECK FUEL LEVEL SENSOR UNIT
Check the resistance between fuel level sensor unit and fuel pump.
*: When float rod is contact with stopper.
Is inspection result OK?
YES >> INSPECTION END
NO >> Replace fuel level sensor unit and fuel pump. Refer to FL-5, "
Removal and Installation".
Combination meter
GroundContinuity
Connector Terminal
M34 34 Not existed
Fuel level sensor unit Combination meter Continuity
Connector Terminal Connector Terminal
C5 5 M34 24 Existed
Te r m i n a l s ConditionResistance (
Ω)
(Approx.) Height [mm (in)]
Fuel level sensor unit
25 Full
* (A)
46.0 282 (11.10)
Empty
* (B) 278.0 29 (1.14)
JSNIA3018ZZ
Revision: 2010 May2011 QX56

MWI
OIL PRESSURE SWITCH SIGNAL CIRCUIT
MWI-71
< DTC/CIRCUIT DIAGNOSIS >
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OIL PRESSURE SWITCH SIGNAL CIRCUIT
Component Function CheckINFOID:0000000006221751
1.CHECK COMBINATION METER INPUT SIGNAL
Select the “Data Monitor” for the “METER/M& A” and check the “OIL W/L” monitor value.
>> INSPECTION END
Diagnosis ProcedureINFOID:0000000006221752
1.CHECK OIL PRESSURE SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector and oil pressure switch connector.
3. Check continuity between IPDM E/R harness c onnector and oil pressure switch harness connector.
4. Check continuity between IPDM E/R harness connector and ground.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Repair harness or connector.
Component InspectionINFOID:0000000006221753
1.CHECK OIL PRESSURE SWITCH
Check continuity between oil pressure switch and ground.
Is the inspection result normal?
YES >> INSPECTION END
“OIL W/L”
Ignition switch ON : On
Engine running : Off
Te r m i n a l s Continuity
(+) (
−)
IPDM E/R Oil pressure switch
Connector Terminal Connector Terminal E1324E2061Existed
Te r m i n a l s Continuity
(+) (
−)
IPDM E/R Ground
Connector Terminal
E13 24 Not existed
Condition Continuity
Engine stopped Existed Engine running Not existed
ELF0044D
Revision: 2010 May2011 QX56

MWI
WASHER LEVEL SWITCH SIGNAL CIRCUITMWI-73
< DTC/CIRCUIT DIAGNOSIS >
C
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M B A
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WASHER LEVEL SWITCH SIGNAL CIRCUIT
Diagnosis ProcedureINFOID:0000000006221754
1.CHECK WASHER LEVEL SWITCH SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect combination meter connector and washer level switch connector.
3. Check continuity between combination meter har ness connector and washer level switch harness con-
nector.
4. Check continuity between combination meter harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair harness or connector.
2.CHECK WASHER LEVEL SWITCH GROUND CIRCUIT
Check continuity between washer level switch connector and ground.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Repair harness or connector.
Component InspectionINFOID:0000000006221755
1.CHECK WASHER LEVEL SWITCH
1. Turn ignition switch OFF.
2. Disconnect washer level switch connector.
3. Check washer level switch.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace washer level switch. Refer to WW-62, "
Removal and Installation".
Te r m i n a l s
Continuity
Combination meter Washer level switch
Connector Terminal Connector Terminal M34 29 E54 1 Existed
Te r m i n a l s Continuity
Combination meter
Ground
Connector Terminal
M34 29 Not existed
Te r m i n a l s Continuity
Washer level switch
Ground
Connector Terminal
E54 2 Existed
Te r m i n a l s Condition Continuity
Washer level switch
12 Washer level switch ON Existed
Washer level switch OFF Not existed
Revision: 2010 May2011 QX56

MWI-74
< DTC/CIRCUIT DIAGNOSIS >
A/C AUTO AMP. CONNECTION RECOGNITION SIGNAL CIRCUIT
A/C AUTO AMP. CONNECTION RECOGNITION SIGNAL CIRCUIT
Diagnosis ProcedureINFOID:0000000006221756
1.CHECK A/C AUTO AMP. CONNECTION RECOGNITION SIGNAL
1. Turn ignition switch ON.
2. Check voltage between combination meter harness connector and ground.
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 2.
2.CHECK A/C AUTO AMP. CONNECTION RECOGNITION SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect combination meter connector and A/C auto amp. connector.
3. Check continuity between combination meter harness connector and A/C auto amp. harness connector.
4. Check continuity between combination meter harness connector and ground.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Repair harness or connector.
Te r m i n a l s
Vo l ta g e
(Approx.)
(+) (
−)
Combination meter Ground
Connector Terminal
M34 19 5 V
Combination meter A/C auto amp. Continuity
Connector Terminal Connector Terminal
M34 19 M50 6 Existed
Combination meter GroundContinuity
Connector Terminal
M34 19 Not existed
Revision: 2010 May2011 QX56

MWI
THE OIL PRESSURE WARNING LAMP DOES NOT TURN OFFMWI-79
< SYMPTOM DIAGNOSIS >
C
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THE OIL PRESSURE WARNING LAMP DOES NOT TURN OFF
DescriptionINFOID:0000000006221765
The oil pressure warning lamp remains illuminated while the engine is running (normal oil pressure).
Diagnosis ProcedureINFOID:0000000006221766
1.CHECK OIL PRESSURE WARNING LAMP
Perform auto active test. Refer to PCS-10, "
Diagnosis Description".
Is oil pressure warning lamp blinking?
YES >> GO TO 2.
NO >> GO TO 5.
2.CHECK IPDM E/R OUTPUT VOLTAGE
1. Turn ignition switch OFF.
2. Disconnect the oil pressure switch connector.
3. Turn ignition switch ON.
4. Check voltage between the oil pressure switch harness connector terminal and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 4.
3.CHECK OIL PRESSURE SWITCH
Perform a unit check for the oil pressure switch. Refer to MWI-71, "
Component Inspection".
Is the inspection result normal?
YES >> Replace IPDM E/R. Refer to PCS-32, "Removal and Installation".
NO >> Replace oil pressure switch. Refer to EM-58, "
Removal and Installation".
4.CHECK OIL PRESSURE SWITCH SIGNAL CIRCUIT
Check the oil pressure switch signal circuit. Refer to MWI-71, "
Diagnosis Procedure".
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair harness or connector.
5.CHECK COMBINATION METER INPUT SIGNAL
Connect CONSULT-III and perform an input signal check for the combination meter. Refer to MWI-71, "
Com-
ponent Function Check".
Is the inspection result normal?
YES >> Replace combination meter. Refer to MWI-85, "Removal and Installation".
NO >> Replace IPDM E/R. Refer to PCS-32, "
Removal and Installation".
Te r m i n a l s
Voltag e
(Approx.)
(+) (
−)
Oil pressure switch Ground
Connector Terminal
E206 1 12 V
Revision: 2010 May2011 QX56