2011 INFINITI QX56 Factory Service Manual

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INFINITI QX56 2011 Factory Service Manual
COMPONENT PARTSSTR-5
< SYSTEM DESCRIPTION >
C
DE
F
G H
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J
K L
M A
STR
NP
O
SYSTEM DESCRIPTION
COMPONENT PARTS
Component Parts LocationINFOID:0000000006275518
Component DescriptionINFOID:000000000627

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INFINITI QX56 2011 Factory Service Manual
STR-6
< SYSTEM DESCRIPTION >
SYSTEM
SYSTEM
System DiagramINFOID:0000000006275520
System DescriptionINFOID:0000000006275521
When selector lever is P or N, power is supplied to starter relay and star

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INFINITI QX56 2011 Factory Service Manual
STARTING SYSTEMSTR-7
< WIRING DIAGRAM >
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WIRING DIAGRAM
STARTING SYSTEM
Wiring DiagramINFOID:0000000006275522
JCBWM2110GB
Revision: 2010 May2011 QX56

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INFINITI QX56 2011 Factory Service Manual
STR-8
< WIRING DIAGRAM >
STARTING SYSTEM
J C B W M 2 111 G B
Revision: 2010 May2011 QX56

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INFINITI QX56 2011 Factory Service Manual
STARTING SYSTEMSTR-9
< WIRING DIAGRAM >
C
DE
F
G H
I
J
K L
M A
STR
NP
O
JCBWM2112GB
Revision: 2010 May2011 QX56

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INFINITI QX56 2011 Factory Service Manual
STR-10
< WIRING DIAGRAM >
STARTING SYSTEM
JCBWM2113GB
Revision: 2010 May2011 QX56

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INFINITI QX56 2011 Factory Service Manual
DIAGNOSIS AND REPAIR WORKFLOWSTR-11
< BASIC INSPECTION >
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STR
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BASIC INSPECTION
DIAGNOSIS AND REPAIR WORKFLOW
Work FlowINFOID:0000000006275533
OVERALL SEQUENCE
DETAILED FLOW

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INFINITI QX56 2011 Factory Service Manual
STR-12
< BASIC INSPECTION >
DIAGNOSIS AND REPAIR WORKFLOW
NOTE:
To ensure a complete and thorough diagnosis, the battery, starter motor and alternator test segments must be
done as a set from start t

STR-12
< BASIC INSPECTION >
DIAGNOSIS AND REPAIR WORKFLOW
NOTE:
To ensure a complete and thorough diagnosis, the battery, starter motor and alternator test segments must be
done as a set from start to finish.
1.DIAGNOSIS WITH STARTING /CHARGING SYSTEM TESTER
Perform the starting system test with Starting/Char ging System Tester (SST: J-44373). For details and operat-
ing instructions, refer to Technical Service Bulletin.
Te s t r e s u l t
CRANKING VOLTAGE NORMAL>>GO TO 2.
CRANKING VOLTAGE LOW>>GO TO 5.
CHARGE BATTERY>>Perform the slow battery charging procedure. (Initial rate of charge is 10A for 12
hours.) Perform battery test again. Re fer to Technical Service Bulletin.
REPLACE BATTERY>>Before replacing battery, clean t he battery cable clamps and battery posts. Perform
battery test again. Refer to Technical Service Bu lletin. If second test result is “REPLACE BAT-
TERY”, then do so. Perform battery test again to confirm repair.
2.CRANKING CHECK
Check that the starter motor operates correctly.
Does the engine crank normally?
YES >> GO TO 3.
NO >> GO TO 4.
3.ENGINE START CHECK
Check that the engine starts.
Does the engine start?
YES >> Starter motor is OK. INSPECTION END
NO >> Perform further diagnosis of engine mechanical or engine control system. Refer EM and EC sec-
tions. Once resolved, perform battery test again.
4.STARTER MOTOR ACTIVATION
Check that the starter motor operates.
Does the starter motor turn?
YES >> Check ring gear and starter motor drive pinion. Once resolved, perform battery test again.
NO >> GO TO 7.
5.COMPARISON BETWEEN ENGINE COOLANT AND CRANKING VOLTAGE
Compare the engine coolant temperature and the cranking voltage with the specifications.
Minimum Specification of Cranking Voltage Referencing Coolant Temperature
Is the voltage less than the specified value?
YES >> GO TO 7.
NO >> GO TO 6.
6.STARTER OPERATION
Check the starter operation status.
Does the starter motor turn smoothly?
YES >> Starter motor is OK. INSPECTION END
NO >> GO TO 7.
7.“B” TERMINAL CIRCUIT INSPECTION
Check “B” terminal circuit. Refer to STR-14, "
Diagnosis Procedure".
Is
“B” terminal circuit normal?
Engine coolant temperature [ °C ( °F)] Voltage [V]
− 30 to −20 ( −22 to −4) 8.6
− 19 to −10 ( −2 to 14) 9.1
− 9 to 0 (16 to 32) 9.5
More than 1 (More than 34) 9.9
Revision: 2010 May2011 QX56

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