2010 INFINITI QX56 Factory Service Manual

Page 1745 of 4210

INFINITI QX56 2010  Factory Service Manual EC-392
< COMPONENT DIAGNOSIS >[VK56DE]
COOLING FAN
COOLING FAN
Diagnosis ProcedureINFOID:0000000005149469
1.CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness conne

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INFINITI QX56 2010  Factory Service Manual COOLING FANEC-393
< COMPONENT DIAGNOSIS > [VK56DE]
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2. Supply cooling fan motor terminals with battery voltage and
check operation.
Cooling fan motor should operate.
If

Page 1747 of 4210

INFINITI QX56 2010  Factory Service Manual EC-394
< COMPONENT DIAGNOSIS >[VK56DE]
ELECTRICAL LOAD SIGNAL
ELECTRICAL LOAD SIGNAL
DescriptionINFOID:0000000005149471
The electrical load signal (Headlamp switch signal, r
ear window defogger switch

Page 1748 of 4210

INFINITI QX56 2010  Factory Service Manual ELECTRICAL LOAD SIGNALEC-395
< COMPONENT DIAGNOSIS > [VK56DE]
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>>
INSPECTION END
Revision: April 20092010 QX56

Page 1749 of 4210

INFINITI QX56 2010  Factory Service Manual EC-396
< COMPONENT DIAGNOSIS >[VK56DE]
FUEL INJECTOR
FUEL INJECTOR
Component DescriptionINFOID:0000000005149473
The fuel injector is a small, precise solenoid valve. When the ECM
supplies a ground to

Page 1750 of 4210

INFINITI QX56 2010  Factory Service Manual FUEL INJECTOREC-397
< COMPONENT DIAGNOSIS > [VK56DE]
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2. Disconnect fuel injector harness connector.
3. Turn ignition switch ON.
4. Check voltage between fuel injector t

Page 1751 of 4210

INFINITI QX56 2010  Factory Service Manual EC-398
< COMPONENT DIAGNOSIS >[VK56DE]
FUEL INJECTOR
Component Inspection
INFOID:0000000005149475
FUEL INJECTOR
1. Disconnect fuel injector harness connector.
2. Check resistance between terminals as

Page 1752 of 4210

INFINITI QX56 2010  Factory Service Manual FUEL PUMPEC-399
< COMPONENT DIAGNOSIS > [VK56DE]
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FUEL PUMP
DescriptionINFOID:0000000005149476
SYSTEM DESCRIPTION
*: ECM determines the start signal status by the signal