INFINITI QX56 2011 Factory Service Manual

MWI-68
< DTC/CIRCUIT DIAGNOSIS >
TRIP COMPUTER SWITCH SIGNAL CIRCUIT
Component Inspection
INFOID:0000000006221747
1.CHECK TRIP COMPUTER SWITCH
1. Turn ignition switch OFF.
2. Disconnect trip computer switch connector.
3. Check trip computer switch.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace trip computer switch. Refer to MWI-87, "
Removal and Installation".
Te r m i n a l s
Condition Continuity
Trip computer switch
3 6When enter switch is pressed Existed
Other than the above Not existed
4 When select switch is pressed Existed
Other than the above Not existed
Revision: 2010 May2011 QX56

MWI
FUEL LEVEL SENSOR SIGNAL CIRCUITMWI-69
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G H
I
J
K L
M B A
O P
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 >
C
D E
F
G H
I
J
K L
M B A
O P
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-72
< DTC/CIRCUIT DIAGNOSIS >
OIL PRESSURE SWITCH SIGNAL CIRCUIT
NO >> Replace oil pressure switch. Refer to EM-58, "Removal and Installation".
Revision: 2010 May2011 QX56

MWI
WASHER LEVEL SWITCH SIGNAL CIRCUITMWI-73
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G H
I
J
K L
M B A
O P
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 FUEL GAUGE INDICATOR DOES NOT OPERATE
MWI-75
< SYMPTOM DIAGNOSIS >
C
D E
F
G H
I
J
K L
M B A
O P
SYMPTOM DIAGNOSIS
THE FUEL GAUGE INDICA TOR DOES NOT OPERATE
DescriptionINFOID:0000000006221757
Fuel gauge will not indicate from a certain position.
Diagnosis ProcedureINFOID:0000000006221758
1.CHECK COMBINATION METER OUTPUT SIGNAL
1. Connect CONSULT-III.
2. Select the “Data Monitor” for the “METER/M&A” and compare the “FUEL METER” monitor value with the
fuel gauge reading on the combination meter. Refer to MWI-69, "
Component Function Check".
Does monitor value match fuel gauge reading?
YES >> GO TO 2.
NO >> Replace combination meter. Refer to MWI-85, "
Removal and Installation".
2.CHECK FUEL LEVEL SENSOR SIGNAL CIRCUIT
Check the fuel level sensor signal circuit. Refer to MWI-69, "
DiagnosisProcedure".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair harness or connector.
3.CHECK FUEL LEVEL SENSOR UNIT
Perform a unit check for the fuel level sensor unit. Refer to MWI-70, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 4.
NO >> Replace fuel level sensor unit. Refer to FL-5, "
Removal and Installation".
4.CHECK FLOAT INTERFERENCE
Check that the float arm interferes with or binds to other components in the fuel tank.
Is the inspection result normal?
YES >> Replace combination meter. Refer to MWI-85, "Removal and Installation".
NO >> Repair or replace malfunctioning parts.
Revision: 2010 May2011 QX56

MWI-76
< SYMPTOM DIAGNOSIS >
THE TRIP RESET AND ILLUMINATION CONTROL SWITCH IS INOPERATIVE
THE TRIP RESET AND ILLUMINATION CONTROL SWITCH IS INOPERA-
TIVE
DescriptionINFOID:0000000006221759
If any of the following malfunctions is found for t he trip reset and illumination control switch operation.
 All switches are inoperative
 The specified switch cannot be operated
Diagnosis ProcedureINFOID:0000000006221760
1.CHECK TRIP RESET AND ILLUMINATI ON CONTROL SWITCH SIGNAL CIRCUIT
Check the trip reset and illumination cont rol switch signal circuit. Refer to MWI-65, "
Diagnosis Procedure".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair harness or connector.
2.CHECK TRIP RESET AND ILLU MINATION CONTROL SWITCH
Perform a unit check for the trip reset and illumination control switch. Refer to MWI-66, "
Component Inspec-
tion".
Is the inspection result normal?
YES >> Replace combination meter. Refer to MWI-85, "Removal and Installation".
NG >> Replace trip reset and illumination control switch. Refer to MWI-86, "
Removal and Installation".
Revision: 2010 May2011 QX56

MWI
THE TRIP COMPUTER SWITCH IS INOPERATIVEMWI-77
< SYMPTOM DIAGNOSIS >
C
DE
F
G H
I
J
K L
M B A
O P
THE TRIP COMPUTER SW ITCH IS INOPERATIVE
DescriptionINFOID:0000000006221761
If any of the following malfunctions is f ound for the trip computer switch operation.
 All switches are inoperative
 The specified switch cannot be operated
Diagnosis ProcedureINFOID:0000000006221762
1.CHECK TRIP COMPUTER SWITCH SIGNAL CIRCUIT
Check the trip computer switch signal circuit. Refer to MWI-67, "
Diagnosis Procedure".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair harness or connector.
2.CHECK TRIP COMPUTER SWITCH
Perform a unit check for the trip computer switch. Refer to MWI-68, "
Component Inspection".
Is the inspection result normal?
YES >> Replace combination meter. Refer to MWI-85, "Removal and Installation".
NG >> Replace trip computer switch. Refer to MWI-87, "
Removal and Installation".
Revision: 2010 May2011 QX56