2008 INFINITI QX56 Factory Service Manual

Page 1697 of 4083

INFINITI QX56 2008  Factory Service Manual EC-398
< COMPONENT DIAGNOSIS >[VK56DE]
ELECTRICAL LOAD SIGNAL
>>
INSPECTION END
Revision: March 2010 2008 QX56

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INFINITI QX56 2008  Factory Service Manual FUEL INJECTOREC-399
< COMPONENT DIAGNOSIS > [VK56DE]
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FUEL INJECTOR
Component DescriptionINFOID:0000000001365875
The fuel injector is a small, precise solenoid valve. Wh

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INFINITI QX56 2008  Factory Service Manual EC-400
< COMPONENT DIAGNOSIS >[VK56DE]
FUEL INJECTOR
2. Disconnect fuel injector harness connector.
3. Turn ignition switch ON.
4. Check voltage between fuel injector terminal 1 and ground with
CONSUL

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INFINITI QX56 2008  Factory Service Manual FUEL INJECTOREC-401
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Component InspectionINFOID:0000000001365879
FUEL INJECTOR
1. Disconnect fuel injector harness connector.
2. Check r

Page 1701 of 4083

INFINITI QX56 2008  Factory Service Manual EC-402
< COMPONENT DIAGNOSIS >[VK56DE]
FUEL PUMP
FUEL PUMP
DescriptionINFOID:0000000001365881
SYSTEM DESCRIPTION
*: ECM determines the start signal status by the signals of engine speed and battery vo

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INFINITI QX56 2008  Factory Service Manual FUEL PUMPEC-403
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4. Check voltage between ECM terminal 113 and ground with
CONSULT-IIl or tester.
OK or NG
OK >> GO TO 5.
NG >> GO TO 3.

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INFINITI QX56 2008  Factory Service Manual EC-404
< COMPONENT DIAGNOSIS >[VK56DE]
FUEL PUMP
2. Disconnect 15A fuse.
3. Check 15A fuse.
OK or NG
OK >> GO TO 7.
NG >> Replace fuse.
7.CHECK CONDENSER-2 POWER SUPPLY 
CIRCUIT-II FOR OPEN AND SHORT

Page 1704 of 4083

INFINITI QX56 2008  Factory Service Manual FUEL PUMPEC-405
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>> Repair open circuit or short to ground or short to power in harness or connectors.
12.CHECK FUEL PUMP
Refer to  EC-4